KR101143897B1 - Methane fermenter using seawater - Google Patents

Abstract

The present invention relates to a digestive fermentation tank of wettable biomass using sea water, and more particularly, to stabilize and decompose organic components of wet organic matter biogas such as livestock waste, food waste and sewage sludge by anaerobic bacteria. The present invention relates to an anaerobic digestive fermentation chamber that reduces weight and produces biogas energy, digestive waste solution, and digestive fermentation tank of wet biomass using seawater that can be returned to the sea by purifying marine bacteria, plankton food, and nutrients.

The present invention is a digestive fermentation tank (80) composed of an anaerobic digestive fermentation chamber and a digestive waste liquid purification chamber integrally, the digestive fermentation tank (80) is a warming device capable of warming the inner bottom surface, and is heated by the warming device anaerobic Anaerobic digestive fermentation chamber 20 for digestive fermentation, a dome valve (Dome Valve 30) which is moved up and down from the upper portion of the anaerobic digestive fermentation chamber 20, and purifying digestive waste fluid from the upper portion of the dome valve 30 Characterized in the digestive fermentation tank of the wettable biomass using seawater, including the digestion waste liquid purification chamber (10).

Biomass, digestive fermentation tank, sludge, seawater, dome, anaerobic, digestive waste, heating device

Description

Digestion and fermentation tank of wettable biomass using seawater {METHANE FERMENTER USING SEAWATER}

The present invention relates to a digestive fermentation tank of wettable biomass using sea water, and more particularly, stabilization, lightening, and biodegradation of organic components of wet organic matter biogas such as livestock waste, food waste, and sewage sludge by anaerobic bacteria. The present invention relates to an anaerobic digestive fermentation chamber that produces gas energy, a digestive waste solution, and a digestive fermentation tank of wettable biomass using seawater that can be returned to the sea after being purified by marine bacteria, plankton food, and nutrients.

Biomass can be used as an energy source to store energy, to be renewable, to be obtained anywhere in the world if water and temperature conditions are met, and to develop with less capital, In comparison, it is environmentally safe.

Biomass is used as an energy source for direct combustion, methane fermentation and alcohol fermentation. For example, methane gas is produced when organisms rot in the absence of air. This process is called inorganic breathing, and the generated methane gas, that is, biogas, can be used as fuel for cooking and heating.

Bio-chemical conversion, which is a kind of biomass conversion technology, is divided into a process for producing biogas by an "anaerobic digestive fermentation method" and a methanol production process by a "glycosylated alcohol fermentation method". Biomass resources applied to the methane fermentation method are for the wet organic material consisting of food industry (food waste, food industry wastewater, food waste) and agricultural fisheries system (livestock waste, fish internals, agricultural waste).

A methane fermentation plant using livestock manure is called a biogas plant, including the use and utilization of methane produced there. The basic configuration of the biogas plant, as shown in Figure 4, the supply system of the manure, the reaction system in the digestive fermentation tank (including the reactor mechanism, the stirring mechanism of the bacteria), the use or utilization system of the biogas, residue and waste solution Can be divided into use and utilization.

In the supply system of manure, the water content of livestock manure as a raw material of biomass is somewhat different depending on the breeding situation, the type and structure of the barn, and the beef is 80-86%, the pig is 70-80%, and the chicken is About 50-77%, but beef and swine dung are added to the storage tank by adjusting the water content so that the solid concentration in the fermentation tank is 7-12%. Of course, it is sent to the digestive fermentation tank through the inlet ⇒ import tank (sedimentation) ⇒ contaminant sorting and grinding device ⇒ storage tank ⇒ input pump for the purpose of removing the impurities in the raw manure prior to the input.

Stock solution phase standard of pork ( mg / L)

Before input After removing stenosis BOD 25,000-50,000 12,000-15,000 SS 25,000-50,000 18,000 mg / L

When looking at the reaction system in the anaerobic digestive fermentation tank, when the livestock manure is introduced into the digestive fermentation tank, precipitation occurs first and solid molecules settle, and liquid molecules move up and down, but each part is organic hydrophilic by the anaerobic bacteria. It is decomposed into methane and carbon dioxide by decomposition and formation of volatile organic acids and gasification of methane, an absolute anaerobic bacterium. Because anaerobic digestion is achieved by the co-formation of two bacterial groups with different properties, it is necessary to maintain the environment in the digestive tank so that the anaerobic bacteria can work effectively. Among the organic components of livestock manure, biologically inactive components and minerals, which are not anaerobic decomposed, are discharged as 'digestion sludge', and the amount is about 10 to 17% of the amount of manure input.

The fire extinguishing temperature is 35 to 40 ℃, and the high temperature is 50 to 55 ℃ and the number of fire extinguishing days is 30 days as standard. The manure put into the first digestive fermentation tank is stirred while maintaining at a predetermined extinguishing temperature, in contact with the digestive sludge in the vessel, and after 15 days or more, the digestive waste liquid is transferred to the second digestive fermentation tank. Digestive fermentation of manure is almost complete in the first digestive fermentation tank, with the majority of gas evolution taking place here. Therefore, the amount of manure to be added is equalized every day as much as possible, and continuous feeding is carried out to avoid digestion of the load and to stir for as long as possible to aid digestion and prevent the occurrence of scum. In particular, operation management that keeps in mind the maintenance of the extinguishing temperature is important. When digesting waste liquid is sent from the first digestive fermentation tank to the second digestive fermentation tank, the agitation in the first digestive fermentation tank is stopped and the waste liquid is moved after a certain time.

5A and 5B are exemplary views of a waste liquid conveying apparatus using a natural oil defect method. 5A shows that the position of the first-class pipe (94) mounted on the first fire fermentation tank 97 is fixed so that only the amount of manure is directly supplied. Although there is a high possibility, FIG. 5B shows that when the valve 93 is operated up and down in accordance with the level of the first fire fermentation tank 97, the second fire extinguishing connected to the second fire extinguishing tank is stirred and mixed while being not transported during manure injection. Through the fermentation tank connecting tube 92 can be transferred to the second digestive fermentation tank. In the second digestive fermentation tank, the digested waste liquid transferred from the first digestive fermentation tank is stopped and settled in the tank to separate solid-liquid, send the digested waste liquid to the aerobic treatment facility, and send the digested sludge to the dehydration process.

As described above, when the digestive waste liquid is transferred to the second digestive fermentation tank, it is possible to first classify the digestive waste liquid of good water quality after a stop time of about 4 hours after the input or agitation is finished, and the second digestive tank is overloaded. Can be prevented. In principle, the second digestive fermentation tank is to be separated from solids by stirring and heating without stopping, so waste liquid with low BOD value should be sent as possible. When the digestive waste fluid is transferred from the second digestive fermentation tank to the aerobic treatment facility, it is preferable to send the same amount continuously for 24 hours, so that the second digestive fermentation tank is equipped with a fixed amount extraction pump. In order to smooth anaerobic digestion, it is necessary to keep a certain amount of digested sludge as a seed sludge in the tank. The higher the amount, the more active the reproductive action. In the daily operation record, the digestion status while checking the digestion to extract 1/3 to 1/5 of the tank capacity should always be maintained.

In the first digestive fermentation tank, the agitation is sufficiently brought into contact with the raw manure and the sludge to be introduced to maintain the temperature in the tank uniformly to increase the digestion efficiency, and the distribution of the manure is uniform so that the live manure in the micronized state is second digested. It is intended to prevent the flow to the fermentation tank, and to prevent the occurrence of scum (Scum), for this purpose, there are methods such as gas stirring, liquid circulation, mechanical stirring. At present, it is mainly used as a gas stirrer to circulate the generated gas from the bottom of the digester and to stir the tank with the force of the foam.

The amount of digested gas depends on the extinguishing efficiency, digestion temperature, and concentration of organic matter in the manure, but in the medium temperature fermentation tank of continuous input type, it is usually 8 ~ 10㎥ per 1㎥ of manure. In a two-digest fermentation tank, only about 1/20 of the 1st digestive fermentation tank occurs.

Biogas generation is a strong indicator of extinguishing efficiency. The composition of biogas is 60 ~ 75% of CH₄, 25 ~ 30% of CO2, 2 ~ 10% of hydrogen, 0.5 ~ 1.0% of hydrogen emulsification. Decreases. And because it has a calorific value of 5,000 ~ 7,000 ㎉ / ㎥, biogas can be stored in gas holder and used as fuel of digester heating boiler.

The capacity of the biogas tank should be able to store more than 8 hours of gas generated. In addition, the amount of biogas generated increases and decreases due to manure input, agitation, and extraction of digested sludge.

In addition, there are two types of gas holders, flow type and dry type, and manure treatment uses a lot of flow type. Water-flow gas holders are designed with a 250 ~ 300mmHg internal pressure and care must be taken in freezing in winter. In extreme areas, groundwater gas may be used or heat exchangers may be used to warm gas holders.

A dilution adjusting tank, an activated sludge method, an acid water channel method, a final settling process, a sludge treatment, etc. are used for the treatment equipment (for the purpose of discharge to the stream) of the digestive waste liquid, and the dilution adjusting tank normally operates a digestive fermentation tank. When present, the BOD value of digestive pulmonary fluid rarely exceeds 2,500 mg / L. Dilution adjustment tank dilutes digestive waste liquid 20 times with groundwater or river water, and then treats it by activated sludge method or acid water channel method.

In the activated sludge process, the aeration tank has a residence time of 6 to 8 hours, the return sludge volume is 30% by volume ratio, and the maximum conveyance is 50% sludge. The BOD load should be 0.4 kg BOD / ㎥ / day, and the aeration system should be well stirred in the aeration tank and supply 1 kg of oxygen per kg of BOD removed. In this case, the amount of air supplied by the aeration type aeration should be 1.2 m3 or more per hour for 1 m3 of the aeration tank. It is generally difficult to treat the diluent directly without dilution, or by dilution of the amount of parcel water, but it is generally difficult, but the BOD load is 0.6kgBOD / ㎥ / day or less, and the aeration intensity (acid type) is 1 A㎥. The standard shall be 2.0m3 or more per hour. It is possible by adjusting the operating conditions such as aeration time, continuous uniform injection, etc., but the BOD removal rate is more suitable than the case of 20-fold dilution. In the activated sludge process, a large amount of surplus activated sludge, which has high water content and bad dehydration, is required, and thus requires skill in maintenance.

The above-mentioned arithmetic channel method generally uses a high-speed arithmetic method, and the BOD load is 0.6 kg BOD / m 3 / day, and the water load is 15 m 3 / m 3 / day as a standard. Carriage ratios are often 1: 1 and the depth of the furnace is about 1.8 m. The removal rate of BOD is 50 ~ 60% in combination with the final settler, but it is considerably inferior to the activated sludge method, so it is often difficult to meet the discharge water quality standard. In winter, the efficiency decrease is remarkable, a large area is required, and the odor problem is often used to switch to the activated sludge process.

The final settler has a residence time of 3 hours or more, a water area load of 18 m 3 / m 2 / day or less, and the first load is 70 m 3 / m 2 / day.

The residence time of the disinfection tank should be maintained for at least 15 minutes and the chlorine injection rate should be at least 10 mg / L.

In the sludge treatment, the planned sludge amount is set based on the planned throughput. 20% (95% water content) of the planned throughput when the sludge is injected into the digested sludge output from the anaerobic digestive fermentation tank and the planned throughput is 15% (99% water content) and 30% (99% water content) of the planned throughput are used as the standard amount of surplus activated sludge.

Manure digestion sludge is easier to dehydrate due to the poorer solids compared to the digestive sludge of sewage, but surplus sulfur sludge should be washed once or twice with 2 ~ 3 times of washing water as pretreatment to reduce acidity and reduce the use of acid flocculant. Do it.

As a dehydration device, a vacuum filter, a centrifuge, and a capillary dehydration function are used. The separation liquid from this process is high in BOD and SS, and is returned to the active sludge treatment process for reprocessing. Dehydrated cakes are used for landfilling, incineration, or agricultural fertilizers, which have recently been used to produce carbon carbide.

However, at present, the recovery of energy from waste biomass is still inferior to that of developed countries, and it is well established that in Korea, it is natural to reduce animal waste to compost or to manure. In addition, the methane fermentation device has become a barrier to the following reasons.

1) Like developed countries, there is a lack of awareness of the necessity of recovering energy from all biomass either to prevent global warming or to obtain alternative energy for fossil fuels.

2) It is economically disadvantageous to recover energy from biogas due to huge expenses such as facility cost and maintenance cost in purifying digestive waste liquid.

3) It is hard to say that the farmers are still gaining understanding and cooperation on the effects of using liquid fertilizer.

4) The nitrogen concentration in digestive waste liquid is high, so the amount of nitrogen may be excessive depending on the type of crop. It is also recognized that crops that contain high levels of nitric acid are harmful to the health of livestock.

5) Practical technology development is required to reduce the concentration of high nitrogen in digestive waste fluid and to adjust the nitrogen concentration according to the target crop.

6) No risk management measures have been established regarding epidemiological safety and trace contaminants in pathogenic bacteria and viruses in digestive pulmonary fluid.

7) There is a need for a technology that can be applied to small scale methane fermentation equipment that can be installed in farmyards or large scale methane fermentation equipment of thousands of heads.

8) In the energy recovery system such as the methane fermentation system, the investment cost and the maintenance cost such as operation and repair are high, so it is not possible to procure the economy of general farmers and farm cooperatives.

9) It is not possible to sell power generated by biogas produced at a unit price to a power company.

The present invention is to solve the above problems, an object of the present invention is to decompose the organic components of wet organic matter biogas, such as livestock waste, food waste, sewage sludge by anaerobic bacteria to stabilize and lighten the biogas energy at the same time In addition, it is to provide a digestive fermentation tank of wetted biomass using seawater that can be returned to the sea by purifying by-product digestive waste liquid, sludge as marine bacteria, plankton food, nutrients.

In addition, the present invention is to put all the organic waste in the system of the seawater as a solvent to produce biogas energy in the digestive fermentation tank through slurry, heating, solubilization of the optimum state, the digested waste liquid and digestion sludge Its purpose is to provide digestive and fermentation tanks of wettable biomass using seawater that can become nutrients of marine bacteria and plankton and purify while appropriately raising fish.

The present invention is a digestive fermentation tank (80) composed of an anaerobic digestive fermentation chamber and a digestive waste liquid purification chamber integrally, the digestive fermentation tank (80) is a warming device capable of warming the inner bottom surface, and is heated by the warming device anaerobic Anaerobic digestive fermentation chamber 20 for digestive fermentation, a dome valve (Dome Valve 30) which is moved up and down from the upper portion of the anaerobic digestive fermentation chamber 20, and purifying digestive waste fluid from the upper portion of the dome valve 30 A digestive fermentation tank of wettable biomass using seawater including a digestive waste fluid purification chamber 10 is featured.

At this time, the dome valve seating jaw 31 which protrudes inward from the middle part of the said side wall 11, and the upper side wall of the dome valve seating jaw 31 is formed in the side wall 11 which forms the fire-extinguishing tank 80 At least three dome valve flow guides 33 are vertically mounted to 11 so as to have the same spacing, and a dome valve upper limit 34 is mounted at the top of the dome valve flow guide 33. The valve 30 includes a conical dome roof 32 having an open bottom, a sealing member 37 attached to the bottom periphery of the dome roof 32, a lower portion of the dome roof 32 and a roller connecting rod ( 38 and rollers 35 and 36 which are rotated by the valve flow guide 33 to be seated or floated on the dome valve seating jaw 31.

In addition, a dome valve position indicating rod 40 penetrates through an upper end of the dome valve 30, and the dome valve position indicating rod 40 is a pipe having a hollow inside. And a safety valve 41 for exposing the air inside the dome valve 30 to the outside, a solar cell unit 42 for converting light energy into electrical energy, and the dome. It is preferable that the sensor unit 43 is further mounted so as to detect the position of the valve position indicating rod 40.

In addition, the biogas collected on the inner upper end of the dome valve 30 is configured such that the biogas discharge pipe 29 is connected to the outside of the digestive fermentation tank 80 so as to be discharged to the outside of the digestive fermentation tank 80, the anaerobic The bottom surface of the digestive fermentation chamber 20 is formed with a gradient sludge settling portion 21 with a raised central portion, and the heating device is mounted inside the gradient sludge settling portion 21. The steam heating part 22 is mounted at the center portion of the gradient sludge settling portion 21, and the hot water pipe 24 is uniformly mounted inside the gradient sludge settling portion 21. .

On the other hand, the present invention, the digestive waste liquid purification chamber 10 and anaerobic digestive fermentation chamber 20 is preferably configured to be filled with sea water.

According to the present invention as described above, the digestive waste liquid is completely removed from the conventional liquid fertilizer (비 肥) to produce biogas energy by anaerobic digestion and fermentation of all wet organic wastes in a process using seawater as a solvent. The digestive waste liquid generated can be lined up with a new fish farming process using marine bacteria, plankton food, and nutrients through the entire process, and by combining the appropriate fish farming process for the process, it is possible to make profitable business while increasing the purification effect of the waste liquid. do. In addition, it is a technology to foster the methanation industry of organic waste, which is a new concept of the general method of bio-use which fuses the ineffectiveness of digestive waste liquid for the reproduction of marine organisms, and can exert the effect of resource recycling organic waste. have.

On the other hand, true methane bacteria that produce biogas can make the best use of the property of benthic bacteria. In addition, by adopting methanation using seawater, pathogens such as E. coli and typhoid bacteria, which are attached to wet organic matter such as food waste and sewage sludge, come into the seawater system from land or fresh water. Has the effect of not being able to survive long. That is, these pathogens have the advantage of killing in seawater due to the action of taking away the water in the pathogen cells due to the separation of the plasma due to the penetration pressure of the seawater, or dehydration.

Therefore, if you do a floor cleaning such as pig house barn in sea water, not only cleaning but also protects livestock from germs, it does not require disinfection facilities for hospital bacteria, viruses and the like.

Hereinafter, a digestive fermentation tank of wettable biomass using seawater according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a digestive fermentation tank of wettable biomass using seawater according to an embodiment of the present invention, and FIG. 2 is a digestive fermentation tank of wettable biomass using seawater according to an embodiment of the present invention. 3 is a schematic diagram of an anaerobic digestive fermentation facility, and FIGS. 3A and 3B are diagrams illustrating an operation state of a digestive fermentation tank of wet biomass using seawater according to one embodiment of the present invention.

In adding the reference numerals to the components of the drawings, the same components are to have the same reference numerals as possible even if displayed on different drawings, and known functions that are determined to unnecessarily obscure the subject matter of the present invention Detailed description of the configuration will be omitted. In addition, directional terms such as 'top', 'bottom', 'front', 'back', 'tip', 'front', 'back' and the like are used in connection with the arrangement direction of the disclosed drawings. Since the components of the embodiments of the present invention can be positioned in various arrangement directions, the directional terminology is used for the purpose of illustration, but not limitation.

Digestive fermentation tank of the wettable biomass using seawater according to a preferred embodiment of the present invention, as shown in Figure 1 to 3b as a digestive fermentation tank 80 that can be purified by storing the waste water inside, the inner bottom surface A heating apparatus capable of warming to, an anaerobic digestive fermentation chamber 20 heated by the warming apparatus for anaerobic digestive fermentation, and a dome valve moved up and down from the upper portion of the anaerobic digestive fermentation chamber 20 And a fire extinguishing fluid purification chamber 10 for purifying fire extinguishing fluid from an upper portion of the dome valve 30.

Therefore, the anaerobic digestive fermentation chamber 20 and the digestive waste liquid purification chamber 10 are integrally formed in a single digestive fermentation tank 80 and are separated by the dome valve 30.

The dome valve 30 includes a conical dome roof 32 having an open bottom, and a sealing member 37 attached to the bottom periphery of the dome roof 32. It is seated or floated on the dome valve seating jaw 31 protruding inward from the middle portion of the side wall 11 forming a. Here, at least three or more dome valve flow guides 33 are vertically mounted on the upper sidewall 11 of the dome valve seating jaw 31 so that the dome valve 30 flows up and down. The rollers 35 and 36 rotated by the dome valve flow guide 33 are connected to the lower portion of the dome roof 32 by a roller connecting rod 38. In addition, the upper end of the dome valve flow guide 33 is equipped with a dome valve upper limit 34 so that the dome valve 30 is not separated from the dome valve flow guide 33.

Therefore, the dome valve 30 is freely flowed up and down through the dome valve flow guide 33 and the rollers 35 and 36 mounted on the side wall 11 of the fire fermentation tank (80). In addition, the dome valve 30 seated on the dome valve seating jaw 31 formed at the lower end of the dome valve flow guide 33 is the digestion waste liquid purification chamber 10 and the anaerobic digestion and fermentation chamber by the sealing member 37. (20) will be isolated. The sealing member 37 uses a known member such as a synthetic resin material.

In addition, a dome valve position indicating rod 40 penetrates through an upper end of the dome valve 30. That is, the lower end of the dome valve position indicating rod 40 is located inside the dome valve 30 when the dome valve 30 is located on the dome valve seating jaw 31, and the upper end is purifying the digestive waste liquid. It is configured to be exposed to the top of the seal 10.

The dome valve position indicating rod 40 is a hollow pipe, and the dome valve position indicating rod 40 exposed to the upper portion of the digestion liquid purification chamber 10 is fitted with a safety valve 41 to the dome. The air inside the valve 30 can be discharged to the outside. That is, the inside of the dome valve 30 from the safety valve 41 passes through the dome valve position indicating rod 40 to discharge the air inside the dome valve 30 to the outside.

In addition, the upper end of the dome valve position indicator rod 40, the solar cell unit 42 that can convert light energy into electrical energy, and the sensor unit to detect the position of the dome valve position indicator rod 40 It is preferable that 43 is further attached and comprised.

The solar cell unit 42 supplies power for the sensor unit 43 to operate, and the sensor unit 43 is preferably composed of an infrared sensor to position the dome valve position indicating rod 40. By detecting the position of the dome valve 30 can be confirmed.

On the other hand, the biogas collected in the inner upper end of the dome valve 30 is configured such that the biogas discharge pipe 29 is connected to the outside of the digestive fermentation tank 80 to be discharged to the outside of the digestive fermentation tank (80). Therefore, the biogas collected inside the dome valve 30 is discharged to the outside through the biogas discharge pipe 29.

The anaerobic digestive fermentation chamber 20 is a space of the digestive fermentation tank 80 formed in the lower portion of the dome valve 30, the bottom surface is formed a gradient sludge sedimentation portion 21 is raised in the center, the gradient The heating device is mounted inside the sludge settling unit 21.

A vertex of the gradient sludge settling portion 21 is equipped with a wastewater spray pipe 26 connected to a wastewater supply pipe 27 for supplying wastewater and digested sludge from the outside.

In addition, the heating device is equipped with a steam heating unit 22 in the central portion near the vertex of the gradient type sludge settling portion 21, and uniformly inside the surface of the gradient type sludge settling portion 21. 24) is mounted. Therefore, the anaerobic digestion and fermentation chamber 20 is heated through a hot water supply pipe 25 connected to the hot water pipe 24, and in particular, the gradient type needle needle through the steam supply pipe 23 connected to the steam heating unit 22. The central portion of all 21 is warmed to a higher temperature. Therefore, the inside of the anaerobic digestive fermentation chamber 20 is the wastewater warmed through the steam heating unit 22 so that convection is generated by the temperature difference as shown in Figure 3b to circulate the inside.

Meanwhile, a sludge discharge port 28 penetrating the side wall 11 is formed at one lower end of the gradient sludge settling portion 21 so as to discharge the precipitated sludge 50.

The digestive waste liquid purification chamber 10 is a space in which the digestive waste fermented in the anaerobic digestive fermentation chamber 20 is purified into a space of the digestive fermentation tank 80 formed on the dome valve 30. In the digestive waste liquid purification chamber 10, a first catchment part 12 is formed at one side of the side wall 11 to collect waste fluid that over-flows the digestive fermentation tank 80. ) Is connected to the purification waste liquid discharge pipe 13 to supply the waste liquid to the first waste liquid purification tank which will be described later.

Digestive fermentation tank 80 of the present invention configured as described above is operated as a component of the anaerobic digestive fermentation facility as shown in Figure 2, the preferred embodiment of the present invention uses sea water.

2, the seawater (sea water), which is a circulating water, is first collected from the seawater intake unit 60 and stored in the seawater tank 64 installed in the pig farm 66 using the seawater transport vehicle 62. . Herein, the present invention has been described as an example of treating livestock manure, but the present invention is not limited thereto. That is, it can be easily applied to various wastewater treatment facilities.

The seawater stored in the seawater tank 64 is used as a clean water of the pig farm 66, and the manure mixed wastewater generated here is stored in the manure tank 86.

The manure mixed waste water stored in the manure tank 86 is transported to the preparation shop 72 by the manure transport vehicle 70.

The preparation plant 72 includes an import tank 73, a sorting and crusher 74, an oxidation tank 75, and a solubilization tank 76. Each of the above components is already known in the art, so the detailed Description is omitted.

Here, the manure mixed waste water transported to the manure transporting vehicle 70 passes through the import tank 73, the sorting and crusher 74 and the oxidation tank 75 of the preparation plant 72, the digestive fermentation tank 80 of the present invention. It is supplied quantitatively. In addition, when the manure mixed waste water conveyed to the manure transport vehicle 70 is mixed organic waste, it is quantitatively supplied to the digestive fermentation tank 80 of the present invention via the solubilization tank 76 and the oxidation tank 75.

The anaerobic digestive fermentation facility as described above supplies the seawater through the wastewater supply pipe 27 so that the digestive fermentation tank 80 is full as shown in FIG. 3B. At this time, the safety valve 41 mounted on the upper end of the dome valve position indicator rod 40 is opened so that air is not collected inside the lower end of the dome valve 30 and is discharged to the outside.

Therefore, the anaerobic digestive fermentation chamber 20 is filled with seawater, and the extinguishing waste liquid is discharged to the outside through the safety valve 41 of the dome valve position indicating rod 40 after the air inside the dome valve 30 is discharged to the outside. Purification chamber 10 is also filled with sea water. Thereafter, the dome valve 30 is seated on the dome valve seating jaw 31 while receiving its own weight and the load of the seawater filled in the digestion waste liquid purification chamber 10, so that the anaerobic digestive fermentation chamber 20 and the waste liquid purification chamber (10) is to be completely isolated. At this time, it is more completely isolated by the sealing member 37 attached to the outer periphery of the dome valve 30.

Thereafter, the safety valve 41 is closed, and hot water and steam are supplied to the warming device at the same time as the seed mud is injected through the waste water supply pipe 27 to be warmed.

Here, the hot water and steam heating are performed in parallel, and the seed sludge flows along the gradient surface of the gradient-type sludge settling portion 27 to form an onito layer.

When the sludge layer reaches a predetermined design thickness, the seed sludge is stopped and the wastewater is injected through the wastewater supply pipe 27.

Here, as shown in Figure 3b, the digested sludge (50) layer is to be a dwells of the methane group (methane) group, the gradient sludge settling portion 27 is an on-dol heating device at any time appropriate temperature. So that it can be adjusted. In addition, since the steam heating unit 22 installed in the central portion of the heating apparatus has a large heat capacity, a water column is formed in the central portion of the anaerobic digestion and fermentation chamber 20, so that a multiplier liquor suitable for the amount of heat is up-selling. ) To cause agitation in the room. These convection phenomena, which form a rotary flow in the columnar circumference and help the living, such as contact and activities of the waste fluid and floating bacteria and adherent bacteria in the tank, will feed on benthic methane bacteria (Formic acid: It supplies organic materials such as HCOOH) and acetic acid (CH₃COOH).

Here, many organisms, including humans, cannot live without air, and there are never a few species of bacteria that may or may not have oxygen, and there is no better thing, and the sludge 50 in the anaerobic digestive fermentation chamber 20 is such a bacterium. It is a good habitat for. For example, microorganisms called methane bacteria, such as Methanobacteria and Methanococcus, survive well in the absence of oxygen. These microorganisms are divided into groups that consume only minerals such as hydrogen and carbon dioxide, and groups that need simple organic substances such as acetic acid and ureic acid. Any group lives by using oxygen contained in carbon dioxide gas and the rest as methane gas (CH 가스). Exhale in the digestive sludge.

Organic substances such as Uisan (HCOOH) and acetic acid (CH₃COOH), or hydrogen or carbon dioxide, which are prey to the methane bacteria, are produced by the action of many bacteria that can live in the absence of oxygen such as fermentation bacteria and lactic acid reduction bacteria. The prey lives deep in the mud where it is easy to gather.

In this way, sludge layers are stacked so that various bacteria can live together, such as bacteria that produce gas from organic matter and other gases such as methane. In this way, various gases generated in the sludge layer are collected and raised, and are eventually collected in the biogas collecting part 39 at the lower end of the dome valve 30.

The collected biogas is collected in the biogas collecting unit 39 and discharged to the outside through the biogas discharge pipe 29 to produce biogas. In addition, the collected biogas raises the dome valve 30 by buoyancy.

Here, tropical currents are formed by the heating apparatus mounted inside the gradient sludge settling portion 21, and by gentle stirring, a pleasant living environment is created for various methane bacteria, thereby increasing the production of methane gas.

In addition, the gap between the dome valve 30 and the side wall 11 raised by the buoyancy of the biogas, the digestive waste liquid of the anaerobic digestive fermentation chamber 20 in the warm state and the digestive waste liquid purification chamber 10, which is mostly at room temperature. Seawater will be exchanged.

If the digestive fermentation tank 80 is in an extremely normal state, the biogas production is stable, and the seawater that is balanced with a constant amount of wastewater is over-flowed from the first-class water level surface 14 of the digestion wastewater purification chamber 10. It is sent to the first waste liquid purification tank 90 of the next process shown in FIG.

On the other hand, the up and down flow of the dome valve 30 can be accurately confirmed through the sensor unit 43 mounted on the dome valve position indicator rod 40, such measurement data is not shown in the operating portion of the fire fermentation tank It is transmitted, and the injection of waste water and the collection of biogas can be performed automatically, enabling unmanned operation while ensuring safe operation.

As shown in FIG. 2, the purified water through the digestive fermentation tank 80 passes through the first digestion liquid purification tank 90 and the second digestion liquid purification tank 92, through the discharge pipe 96, to the sea. The returned cycle ends.

The first waste liquid purification tank (90) and the second waste liquid purification tank (92) receive abundant sunlight and make it the first production with effective photosynthesis, and from the first digestive fermentation tank where many higher-order consumers inhabit The function of making the medium of residual nutrients (non-digested dissolved in the waste liquid) sent through the purification step is maximized. As one of the methods, the first digestion liquid purification tank 90 and the second digestion liquid purification tank 95 can be used as a farm for the optimum fish species, so that the problem of the waste liquid of the present issue can be fundamentally solved, and methanation of all wet organic wastes. It will be able to break the process from the level of environmental preservation projects in the past and foster new energy regeneration projects in the future.

On the other hand, the preparation plant 72 supplies the power produced by the solar cell unit 88 with an inverter, a storage battery, an electrothermal hot water boiler, an electrothermal steam boiler, a pump, and the deodorizer, and the produced biogas is self-consumed. It is not.

In the present invention, a brief look at producing biogas from wet organic wastes using sea water.

A large number of microscopic plants live on the surface of the ocean near the sun's reach. This is called phytoplankton and is directly or indirectly fed by marine animals such as zooplankton and fish. Despite its very small size, it is known to surpass land production in total because of its huge number. Nutrients, light, temperature and circulation are important conditions for growing plants in the ocean. About 3.5% of salt is dissolved in seawater. The main ions of the salts are Na, Mg, Ca, K, chlorine, sulfur and carbon, which occupy more than 99.9% of the salts contained in seawater. In addition, in the seawater, trace components and organic substances composed of almost all metal ions are dissolved. Seawater is usually alkaline and has a pH in the range of 7.9 to 8.3.

When carbon dioxide is consumed by plants, the equilibrium is broken and the pH rises. Of the trace components, the most needed are phosphorus and nitrogen compounds, and silicon is also required. Therefore, the fact that the growth rate and distribution rate of phytoplankton in marine coasts with a lot of trace components is much higher than that of distant seas, the purpose of using marine plankton and bacteria as a means of purifying digestive waste liquid is constituted by the present invention. It is emphasized that this is a step-by-step consideration.

In the present invention, the digestive waste liquid composed of organic components not used in the methane bacterium is intended to purify the waste liquid by adjusting the temperature and dilution to be a good food for phytoplankton, the primary producer in seawater. One of the purposes of using sea water.

Next, considering that pH 7.5 is appropriate for maintaining the ecology of the methane group, a biogas producer, in general, the optimum operating value is 7.0 to 7.5.

Methane is affected by the concentration of volatile organic acids, an intermediate product of methane fermentation in fresh water. If the concentration is high, alkali is consumed and the pH is finally lowered. Except for the very small amount of organic compounds dissolved in seawater, carbon in seawater is present as carbon dioxide, bicarbonate, and carbonate. These relationships show that the free carbon dioxide dominated by water temperature and hydrogen ion concentration peaks when the water is acidic, and decreases as the alkalinity increases to almost zero when the pH is 9.1.

Methane is very sensitive to the pH value, and under pH 6.6, growth is inhibited, and when pH is below 6.2, the growth becomes difficult. However, methane bacteria in an environment based on seawater (sea water) can be subjected to quantitative control of alkalinity of pH 7.9 to 8.3, so that very stable growth can be achieved. Can manage driving. Next, among the benefits of adopting seawater-based methanation, pathogens such as E. coli and typhoid bacteria, which come together with wet manure such as food waste and sewage sludge, come from land or fresh water. Even if they enter the system, their germs cannot survive long. Perhaps these pathogens have the advantage of being killed in seawater due to the separation of the plasma due to the infiltration pressure of the seawater, or to take water in the pathogen cells due to dehydration. Therefore, cleaning the bottom of pig house in this seawater system not only cleans, but also protects livestock from germs. Therefore, there is no need for disinfection facilities for hospital bacteria, viruses, and the like.

On the other hand, the digestive waste liquid purification chamber (10) at the top of the dome valve is maintained in the full water level with sea water, which is a marine life of bacteria and flora and fauna plankton, which are in exactly the same state as the ocean, is reproduced and sent through the dome valve. The digestive waste fluid provides nutrients that are beneficial to the marine organisms, especially the heat energy supplied by the warmed digestive waste fluids, which makes the living organisms active and consequently aid in the purification of the waste fluid. The digested waste liquid thus purified is flowed toward the first digestion liquid purification tank 90, which is the next process, corresponding to the amount of the raw liquid input.

Bacteria and planktonic microorganisms living in the digestive waste liquid purification chamber are converted and accumulated when the reproductive circulation is completed, and fall into the anaerobic digestive fermentation chamber 20 at the lower end during the opening and closing operation of the dome valve, and finally reduced therein to biogas.

In addition, in the bottom portion of the anaerobic digestive fermentation chamber 20, two types of heating tubes of hot water and steam, other necessary pipes, and various kinds of pipes are installed in a gradient type sludge settle portion forming a gentle slope, and solidified with cement. Is built. The stock solution heated by steam and heated by radiant heat in the center expresses heat convection to give stirring flow to the whole tank to enhance the contact effect between the bacterial group and the stock solution in the tank.

Next, one of the most important things in the present invention is to make the bedding blanket (Bed-blanket) to live according to the benthic, non-ray, oxygen-free Ito layer reproductive habit of methane bacteria group, there This provides a safe haven for methane bacteria to reproduce comfortably and produce large quantities of good quality biogas. In addition, the soil layer will be thickened with sludge that is separated from the stock solution over time, but in proportion to this, the amount of bacteria such as methane will be proliferated enormously to produce active biogas.

On the other hand, in the present invention, the raw material preparation of wet organic waste (inflow, screening, solubilization, oxidation treatment, transport of stock solution, etc.), degassing of produced biogas, removal and purification of carbon dioxide, management of gas holder, methane Except for the process of commercialization of gas (CH), anaerobic digestive fermentation tank, clarification paper, discharge of purified water and recycling process of purified water are completely unmanned and provide automatic technology.

The dome valve 30 is correlated with the biogas buoyancy and the dome valve's own weight based on the water level in the first dome valve, and the dome valve is opened and closed by using the biogas buoyancy until the water level in the dome valve reaches a certain level. The waste liquid is sent to the digestive waste liquid purification chamber 10 at the top and automatically turns on / off the feed solution inlet pump and the biogas discharge pump to maintain the position of the dome valve. However, when an abnormality of biogas occurs or when up-welling is required from the digestive fermentation chamber to control the concentration of the anaerobic digestive fermentation chamber 20, the purpose is achieved by operating ON / OFF from the central cab.

As described above, in the anaerobic digestive fermentation chamber 20, the position of the dome valve can be classified by the signal of the sensor unit equipped with various functions at the apex of the dome valve, so that the fully automated operation is possible.

On the other hand, none of the livestock manure, food waste, sewage sludge, and agricultural and fishery waste have high organic content. And these wastes are scattered over a wide area and are expensive to collect and transport, and it can be said that the purpose of biogas production is to convert them into raw materials, but to develop them into profitable companies. The present invention is more valuable because it is not yet established.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited by the matters described in the claims, but those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention if it is obvious to those skilled in the art.

1 is a schematic configuration diagram of a digestive fermentation tank of wettable biomass using seawater according to one embodiment of the present invention;

2 is a schematic configuration diagram of an anaerobic digestive fermentation facility using a digestive fermentation tank of wettable biomass using seawater according to one embodiment of the present invention;

3a and 3b is an operating state diagram of the digestive fermentation tank of the wettable biomass using seawater according to an embodiment of the present invention,

4 is a configuration diagram of a conventional general biogas plant,

Figures 5a and 5b is an illustration of the conveying device of the waste liquid by the conventional natural flow method.

<Description of Symbols for Main Parts of Drawings>

10: digestive fluid purification chamber 11: side wall

12: First-class collecting part 13: Purification waste discharge pipe

14: First-class water level 20: Anaerobic digestive fermentation room

21: gradient type sludge settling unit 22: steam heating unit

23: steam supply pipe 24: hot water pipe

25: hot water supply pipe 26: waste water spray pipe

27: wastewater supply pipe 28: sludge discharge outlet

29: biogas discharge pipe 30: dome valve

31: Dome valve seating jaw 32: Dome roof

33: Dome valve flow guide 34: Dome valve upper limit

35, 36: roller 37: sealing member

38: roller connecting rod 39: biogas collecting unit

40: dome valve position indicating rod 41: safety valve

42 and 88: solar cell unit 43: sensor unit

50: digestion sludge 60: seawater collection part

62: seawater transport vehicle 64: seawater tank

66: pig farm 68: manure tank

70: manure transport vehicle 72: preparation factory

73: import tank 74: sorting and crusher

75: oxidation tank 76: solubilization tank

80: digestive fermentation tank 82: biogas pump

84: gas holder 86: heating device

90: 1st waste liquid purification tank 91: sludge discharge pump

92: 2nd fire fermentation tank connector 93: valve

94: First-class Hall 95: Second Digestion Liquid Septic Tank

96: discharge tube 97: first digestive fermentation tank

Claims (5)

As an anaerobic digestive fermentation chamber and digestive waste liquid purification chamber 80, which is composed of integrally, The digestive fermentation tank 80, a heating device capable of warming to the inner bottom surface, an anaerobic digestive fermentation chamber 20 for warming by the warming device for anaerobic digestive fermentation, and the upper portion of the anaerobic digestive fermentation chamber 20 Wet biomass using sea water, characterized in that it comprises a dome valve (Dome Valve 30) which is moved up and down, and a digestion waste liquid purification chamber (10) for purifying the digestion waste liquid from the upper portion of the dome valve (30). Digestive fermentation tank. The method of claim 1, The side wall 11 forming the fire fermentation tank 80 includes a dome valve seating jaw 31 protruding inward from an intermediate portion of the side wall 11 and an upper side wall 11 of the dome valve seating jaw 31. At least three dome valve flow guides 33 are vertically mounted to have the same spacing, and a dome valve upper limit 34 is mounted at an uppermost end of the dome valve flow guide 33. The dome valve 30 includes a conical dome roof 32 having an open bottom, a sealing member 37 attached to the bottom periphery of the dome roof 32, a lower part of the dome roof 32 and a roller. Wet bio-type using sea water, characterized in that it is connected to the connecting table 38 is seated or floated on the dome valve seating jaw 31, including the rollers (35, 36) rotated by the valve flow guide 33 Mass digestive fermentation tank. 3. The method of claim 2, The upper end of the dome valve 30, the dome valve position indicator rod 40 is configured to pass through, The dome valve position indicator rod 40 is a safety valve for exposing the air inside the dome valve 30 to the outside by being exposed to the upper portion of the digestion liquid purification chamber 10 as a hollow pipe ( 41, a solar cell unit 42 capable of converting light energy into electrical energy, and a sensor unit 43 further configured to detect the position of the dome valve position indicating rod 40. Digestive fermentation tank of wettable biomass using seawater. The method of claim 1, The biogas collected in the upper upper end of the dome valve 30 is configured to be connected to the outside of the digestive fermentation tank 80, the biogas discharge pipe 29 so as to be discharged to the outside of the digestive fermentation tank 80, The bottom surface of the anaerobic digestive fermentation chamber 20 is formed with a gradient type sludge settling portion 21 with a raised central portion, and the heating device is mounted inside the gradient type sludge settling portion 21. The heating device is configured to be equipped with a steam heating unit 22 in the center portion of the gradient type sludge settling portion 21, and the hot water pipe 24 is uniformly mounted inside the gradient type sludge settling portion 21. Digestive fermentation tank of wettable biomass using sea water, characterized in that. The method according to any one of claims 1 to 4, The digestive waste liquid purification chamber (10) and anaerobic digestive fermentation chamber (20) is a digestive fermentation tank of wet biomass using sea water, characterized in that the filling is configured.

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