CN109942161A - Sludge, excrement and kitchen garbage cooperate with anaerobic digestion process - Google Patents
Sludge, excrement and kitchen garbage cooperate with anaerobic digestion process Download PDFInfo
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- CN109942161A CN109942161A CN201910174596.XA CN201910174596A CN109942161A CN 109942161 A CN109942161 A CN 109942161A CN 201910174596 A CN201910174596 A CN 201910174596A CN 109942161 A CN109942161 A CN 109942161A
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- anaerobic digestion
- excrement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses sludge, excrement and kitchen garbages to cooperate with anaerobic digestion process, pretreated kitchen garbage and sludge, excrement are uniformly mixed, moisture content is adjusted to 90%, it is cooled to 38 DEG C, the anaerobic digestion of mesophilic anaerobic digestion tank is sent into react 20 days, the biogas part of generation is used for steam boiler, and natural gas is made in remainder, and steam is heated for kitchen garbage pretreatment and pyrohydrolysis reaction；Biogas residue and biogas slurry is concentrated that solid content is made to reach 15%, it is reacted again through homogeneous pulp and pyrohydrolysis, material after reaction cools to 80 DEG C, Nutrition Soil is made lower than 40% through dehydration, desiccation to moisture content, the biogas slurry a part reflux generated in dehydration utilizes, and redundance is discharged into sewage treatment plant's processing.Present invention process energy integrated treatment sludge, excrement and kitchen garbage, can output natural gas and Nutrition Soil, the biogas slurry in technical process, which flows back, to be utilized, and is reduced externally discharge, is realized sludge, excrement and changing food waste into resources, emission reduction and harmless treatment.
Description
Technical field
The invention belongs to sludge, excrement and kitchen garbage merging treatment technical field, especially sludge, excrement and kitchen rubbish
Rubbish cooperates with anaerobic digestion process.
Background technique
The pollution of sludge, excrement and kitchen garbage is always the major issue of environment protection field.Sludge components are very complicated, it is wrapped
Include the solid particles such as the silt particle, fiber, plant and animal residues being mixed into sanitary sewage or industrial wastewater and its condensation floccule, by
Organic matter, heavy metal element and salt, a small amount of pathogenic microorganism, parasitism of zoogloea and its absorption that multiple-microorganism is formed
The integrated solid materials such as worm's ovum.The key property of sludge is moisture content height, and high organic content, easy corruption is smelly, and
Grain is thinner, and specific gravity is smaller, is in colloidal liquid.Mainly there are a variety of processing sides such as desiccation method, semi-oriented, compost, anaerobic digestion at present
Method.Sludge is useful living resources, as can rationally utilizing can not only then turn waste into wealth, moreover it is possible to increase economic benefit, so, have
Effect processing is disposed and is had important practical significance using the technology of sludge
Night soil-treatment is a global problem, solves bad, will seriously affect space and the quality of human lives.Excrement
In organic matter and the substances such as nitrogen, phosphorus wherein, containing there are many enteron aisle germ, parasitic ovum and virus, development in the excrement of patient
Middle national 70% disease with it is related.
Excrement have the characteristics that water content is big, content of organics is more, nitrogen, phosphorus, cause a disease opportunistic pathogen it is more, if direct emission, can make
At water pollution, and the pernicious gas containing odor pollutants such as ammonia, hydrogen sulfide, mercaptan, thioethers is given out, causes health and environment dirty
Dye problem.Stool problems are that city environmental protection must solve the problems, such as, the resource treatment technique of excrement for resource again
It recycles and is of great significance.
Kitchen garbage is the sanitary waste that resident is formed during personal consumption, is easily rotted, and stench is distributed, and is passed
Broadcast bacterium and virus.Kitchen garbage has the characteristics that water content is big, organic matter fat content is more, complicated component.City kitchen rubbish
Rubbish quantity is very huge, and kitchen garbage full of nutrition is valuable renewable resource.
Currently, sludge generally with the methods of municipal sewage Combined Treatment, independent Anaerobic Digestion.Have individually to kitchen rubbish
The processing technique of rubbish, individually to soiled litter processing technique, but individually processing method there are at high cost, complex managements, effect
Bad, secondary pollution problems.
Summary of the invention
The object of the present invention is to provide a kind of sludge, excrement and kitchen garbages to cooperate with anaerobic digestion process, being capable of General Office
Sludge, excrement and kitchen garbage are managed, natural gas and Nutrition Soil can be produced, the biogas slurry in technical process, which flows back, to be utilized, reduction pair
Sludge, excrement and changing food waste into resources, emission reduction and harmless treatment are realized in outer discharge.
Sludge, excrement and kitchen garbage cooperate with anaerobic digestion process, comprising the following steps:
(1) kitchen garbage pre-processes: successively by multi-stage screening crushing, water-oil separating and slurrying；
(2) sludge, excrement pretreatment:
Sludge and excrement are stirred evenly, and mixed with the step (1) kitchen garbage pretreatment resulting material；
(3) Anaerobic Digestion is cooperateed with
It is uniformly mixed with step (2) resulting mixed material in blending tank through step (1) pretreated kitchen garbage, moisture content
It adjusts to 90%, is cooled to 38 DEG C, is sent into the anaerobic digestion reaction that mesophilic anaerobic digestion tank carries out 20 days；Organic matter is in described
Degradation in warm anaerobic digestor, the biogas part of generation are used for steam boiler, the steam of generation for kitchen garbage pretreatment and
High-temperature hot hydrolysis heats, and natural gas is made after the remaining purified purification of biogas；Biogas residue and biogas slurry after anaerobic digestion is through machine
Tool concentration makes solid content reach 15%, then through homogeneous pulp and pyrohydrolysis reaction to improve its dewatering, the reaction of pulp pyrohydrolysis
Material afterwards cools to 80 DEG C, dehydration to moisture content 70%, then Nutrition Soil is made lower than 40% through desiccation to moisture content, takes off
The biogas slurry a part generated during water, which flows back, to be utilized, and redundance is discharged into sewage treatment plant's processing.
It is that mechanical sorting machine removes sundries of the partial size greater than 50mm, crusberscreen that step (1) multi-stage screening, which crushes,
Broken and heat water-spraying is carried out to material, and removes the sundries that partial size is greater than 25mm, vibrating screen screen-aperture is 3mm, oversize
It is sieved again through vibrating screen after pulverizer crushes, undersize material removes the sundries such as tiny tile, sandstone, iron filings through desander.
Step (1) water-oil separating and slurrying are as follows: after material is heated to 50 ± 5 DEG C by steam heating, using
Feed separation is light phase, heavy phase, solid slag three-phase by centrifuge separation；Light phase is by carrying out water-oil separating after being steam heated to 85 ± 5 DEG C
For crude oil rouge and water phase, crude oil rouge moisture content≤3%, water phase oil content≤0.2%, water phase a part as high-temperature-hot-water reuse,
Moisture content of the remainder for the step (3) mixed material adjusts；Solid slag mixes to obtain meal after being slurried material with heavy phase
Kitchen rubbish pre-processes resulting material.
Mechanical stirring is used in step (3) the mesophilic anaerobic digestion tank.
Present invention process has the advantages that compared with prior art
(1) before high-temperature-hot-water solution is usually located at anaerobic digestion by other techniques, and high-temperature-hot-water solution is located at and detests by this technique
It is to improve material dewatering performance with high-temperature-hot-water solution rather than improve anaerobic digestion performance after oxygen digestion.Before anaerobic digestion
High-temperature-hot-water solution is carried out, can inhibit even to kill anaerobic digestion microorganism, cause subsequent anaerobic digestion process because of anaerobic digestion
Microbial activity is insufficient and less effective.High-temperature-hot-water solution is carried out after anaerobic digestion and is avoided that this problem, moreover it is possible to be improved
Material dewatering performance.
(2) this technique can be suitble to handle highly filled up to 10% organic solid waste.
(3) this technique can be suitably used for a plurality of types of wastes, as sludge, kitchen garbage, excrement, stalk, food market are organic
Waste etc..
(4) can integrated treatment sludge, excrement and kitchen garbage, natural gas and Nutrition Soil can be produced, in technical process
Biogas slurry flow back and utilize, reduce externally discharge, realize sludge, excrement and changing food waste into resources, emission reduction and harmless treatment.
Detailed description of the invention
Fig. 1 is the process flow chart that sludge, excrement and kitchen garbage of the present invention cooperate with anaerobic digestion process.
Specific embodiment
Below in conjunction with attached drawing to technology and detailed description of the invention, but do not constitute limiting the scope of the invention.
Present invention process process is as shown in Figure 1.The technique includes kitchen garbage pretreatment, sludge and excrement pretreatment, master
Processing.
1, kitchen garbage pre-processes
Kitchen garbage pretreatment includes: discharging charging, multi-stage screening crushing, water-oil separating and slurrying.
(1) discharging is fed
The vehicle of kitchen garbage is loaded after weight bridge weighing, travels to discharging hall, kitchen garbage is poured into material-receiving device
Kitchen garbage is delivered to mechanical sorting machine by the Shaftless screw conveyor of receiving hopper, receiving hopper bottom belt draining function.
It is escaped to reduce the smell that discharging generates, automatic hydraulic open-close cover is set at the top of receiving hopper, and it is fast that the discharging Room sets two pass
Fast rolling screen door, the discharging Room and material-receiving device keep negative pressure, hopper region and other areas of pretreatment workshop by odor collection system
Domain is separated by partition wall, and odor collection system is arranged to this region emphasis.
(2) multi-stage screening crushes
Mechanical sorting machine removes the sundries (such as metal, tile, vial, polybag) that partial size is greater than 50mm；Crusberscreen pair
Material is crushed, heat water-spraying, and removes the sundries (such as bottle cap, small plastic bag, chopsticks) that partial size is greater than 25mm.This two fraction
95% or more sundries, obtains the homogenous mass based on organic matter in choosing removal material.Vibrating screen screen-aperture is 3mm, on sieve
Object is sieved through vibrating screen again after pulverizer crushes, and undersize material removes the sundries such as tiny tile, sandstone, iron filings through desander,
To meet the feed needs of oil-water separation system.
(3) water-oil separating and slurrying
Heater is passed through after material is heated to 50 ± 5 DEG C by steam, and feed separation is light phase, heavy phase, solid slag by horizontal centrifuge
Three-phase.Light phase is temporarily stored into grease temporary storage tank, is promoted to heater by entering vertical centrifugal machine after being steam heated to 85 ± 5 DEG C through pump
Water-oil separating is carried out, crude oil rouge (moisture content≤3%) is stored in grease holding vessel, and water phase (oil content≤0.2%) enters storage pool,
A part is used as high-temperature-hot-water reuse, and residue is sent to the blending tank of main process task.After solid slag is slurried material by aquation beater
With heavy phase by the blending tank that is pumped into main process task.
2, sludge, excrement pretreatment
Sludge, excrement pretreating process include discharging charging, homogenate.
(1) discharging is fed
After weight bridge weighing, sludge, excrement are transported to discharging hall by transport vehicle, pour into the reception feed bin for being installed on underground, connect
Setting automatic hydraulic open-close cover prevents exhaust gas diffusion at the top of receiving warehouse.
(2) homogenate
Material is pumped to equal stock tank through screw conveyor and plunger by reception bin bottom rectangle heavy caliber discharge hole for discharge, if
The blender for being placed in equal stock tank top stirs evenly sludge and excrement, then by being pumped into blending tank and pretreated kitchen garbage
Mixing.
3, anaerobic digestion main process task technique is cooperateed with
Kitchen garbage, sludge and excrement are sent into blending tank with backflow biogas slurry after pretreatment are uniformly mixed respectively, moisture content
It adjusts to 90%, is cooled to 38 DEG C through double-tube heat exchanger, the anaerobic digestion for being pumped into the progress 20 days of mesophilic anaerobic digestion tank is anti-
It answers.Digester uses mechanical stirring.Organic matter is degraded in digester, and the biogas part of generation is used for steam boiler, generates steaming
Vapour is heated for kitchen garbage pretreatment and high-temperature hot hydrolysis, and natural gas is made after the remaining purified purification of biogas.Anaerobism
Postdigestive biogas residue and biogas slurry make solid content reach 15% through mechanical thickening, high-temperature-hot-water solution unit are pumped into, through homogeneous pulp
It reacts with the pyrohydrolysis of high temperature and high pressure steam (150~170 DEG C of temperature, 0.5~0.8MPa of pressure) effect to improve its dehydration property
Can, the material after the reaction of pulp pyrohydrolysis is cooled to 80 DEG C by cooling system, is dehydrated to moisture content about through centrifugal dehydrator
70%, it send through screw conveyor to drying bed, nutrition is made lower than 40% to moisture content using solar energy and boiler afterheat desiccation
Soil.The biogas slurry a part generated in dehydration is discharged into sewage treatment plant's processing, and a part is back to homogenate pond.
The above-mentioned technique cooperatively processing sludge of the present embodiment, kitchen garbage, the total 300t/d of excrement, wherein sludge 245t/d,
Kitchen garbage 50t/d, excrement 5t/d.Output biogas is 50Nm3Biogas/t material, 5.48 × 106Nm3/ a, Nutrition Soil 0.18t
Nutrition Soil/t material, 1.98 × 104t/a.The biogas substitution coal of generation or the CO of petrochemical industry natural gas2Emission reduction is respectively
13.12kgCO2/ t material, 1436.64 t CO2/ a and 5.04kgCO2/ t material, 551.88t CO2/a；Nutrition Soil replacing fertilizer
CO2Emission reduction is 46.26kg CO2/ t material, 5065.47t CO2/a.Degradation effect of organic compound is up to 60%.
These parameters illustrate present invention process with stable, degradation effect of organic compound is high, recycling is effective excellent
Point.
Claims (4)
1. sludge, excrement and kitchen garbage cooperate with anaerobic digestion process, which comprises the following steps:
(1) kitchen garbage pre-processes: successively by multi-stage screening crushing, water-oil separating and slurrying；
(2) sludge, excrement pretreatment:
Sludge and excrement are stirred evenly, and mixed with the step (1) kitchen garbage pretreatment resulting material；
(3) Anaerobic Digestion is cooperateed with
It is uniformly mixed in blending tank through step (1) pretreated kitchen garbage with step (2) resulting mixed material, it is aqueous
Rate is adjusted to 90%, is cooled to 38 DEG C, is sent into the anaerobic digestion reaction that mesophilic anaerobic digestion tank carries out 20 days；Organic matter is described
Degradation in mesophilic anaerobic digestion tank, the biogas part of generation are used for steam boiler, and the steam of generation is pre-processed for kitchen garbage
It is heated with high-temperature hot hydrolysis, natural gas is made after the remaining purified purification of biogas；Biogas residue and biogas slurry warp after anaerobic digestion
Mechanical thickening makes solid content reach 15%, then through homogeneous pulp and pyrohydrolysis reaction to improve its dewatering, pulp pyrohydrolysis is anti-
Material after answering cools to 80 DEG C, dehydration to moisture content 70%, then Nutrition Soil is made lower than 40% through desiccation to moisture content,
The biogas slurry a part reflux generated in dehydration utilizes, and redundance is discharged into sewage treatment plant's processing.
2. institute's sludge as described in claim 1, excrement and kitchen garbage cooperate with anaerobic digestion process, which is characterized in that described
It is that mechanical sorting machine removes sundries of the partial size greater than 50mm that step (1) multi-stage screening, which crushes, and crusberscreen carries out brokenly material
Broken and heat water-spraying, and the sundries that partial size is greater than 25mm is removed, vibrating screen screen-aperture is 3mm, and oversize is crushed through pulverizer
It is sieved again through vibrating screen afterwards, undersize material removes the sundries such as tiny tile, sandstone, iron filings through desander.
3. institute's sludge as described in claim 1, excrement and kitchen garbage cooperate with anaerobic digestion process, which is characterized in that described
Step (1) water-oil separating and slurrying are as follows: after material is heated to 50 ± 5 DEG C by steam heating, using centrifuge separation by object
Material is separated into light phase, heavy phase, solid slag three-phase；Light phase is crude oil rouge and water by carrying out water-oil separating after being steam heated to 85 ± 5 DEG C
Phase, crude oil rouge moisture content≤3%, water phase oil content≤0.2%, water phase a part are used for as high-temperature-hot-water reuse, remainder
The moisture content of step (3) mixed material adjusts；Solid slag mixes to obtain kitchen garbage pretreatment after being slurried material with heavy phase
Resulting material.
4. institute's sludge as described in claim 1, excrement and kitchen garbage cooperate with anaerobic digestion process, which is characterized in that described
Mechanical stirring is used in step (3) mesophilic anaerobic digestion tank.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407411A (en) * | 2019-08-01 | 2019-11-05 | 浙江天地环保科技有限公司 | A kind of livestock and poultry feces anaerobic digestion biogas slurry pyrohydrolysis reclaiming system and method |
| CN110479733A (en) * | 2019-07-25 | 2019-11-22 | 广东路通投资管理集团有限公司 | A kind of rubbish from cooking high temperature microbe processing method |
| CN110538861A (en) * | 2019-09-26 | 2019-12-06 | 中铁环境科技工程有限公司 | Kitchen waste and sludge co-processing system and method |
| CN110803845A (en) * | 2019-11-27 | 2020-02-18 | 长沙凯天工研院环保服务有限公司 | Biological conditioner and method for improving dehydration performance of anaerobic digestion substances of kitchen waste |
| CN111606536A (en) * | 2020-04-20 | 2020-09-01 | 同济大学 | Method for sludge dewatering by synergistic reinforcement of anaerobic biological acidification of excess sludge and low-temperature hydrothermal coupling of kitchen waste |
| CN112759428A (en) * | 2020-12-11 | 2021-05-07 | 上海然得环境科技有限公司 | A equipment for producing fertilizer |
| CN113020211A (en) * | 2021-03-08 | 2021-06-25 | 上海市城市建设设计研究总院（集团）有限公司 | Kitchen waste and sludge synergistic anaerobic digestion system and method |
| CN115254921A (en) * | 2022-05-10 | 2022-11-01 | 嘉兴市绿能环保科技有限公司 | Kitchen waste treatment process |
| CN116114569A (en) * | 2022-12-22 | 2023-05-16 | 国投信开水环境投资有限公司 | Nutrient soil and preparation method and application thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479733A (en) * | 2019-07-25 | 2019-11-22 | 广东路通投资管理集团有限公司 | A kind of rubbish from cooking high temperature microbe processing method |
| CN110407411A (en) * | 2019-08-01 | 2019-11-05 | 浙江天地环保科技有限公司 | A kind of livestock and poultry feces anaerobic digestion biogas slurry pyrohydrolysis reclaiming system and method |
| CN110538861A (en) * | 2019-09-26 | 2019-12-06 | 中铁环境科技工程有限公司 | Kitchen waste and sludge co-processing system and method |
| CN110803845A (en) * | 2019-11-27 | 2020-02-18 | 长沙凯天工研院环保服务有限公司 | Biological conditioner and method for improving dehydration performance of anaerobic digestion substances of kitchen waste |
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| CN112759428A (en) * | 2020-12-11 | 2021-05-07 | 上海然得环境科技有限公司 | A equipment for producing fertilizer |
| CN112759428B (en) * | 2020-12-11 | 2022-09-30 | 上海然得环境科技有限公司 | A equipment for producing fertilizer |
| CN113020211A (en) * | 2021-03-08 | 2021-06-25 | 上海市城市建设设计研究总院（集团）有限公司 | Kitchen waste and sludge synergistic anaerobic digestion system and method |
| CN115254921A (en) * | 2022-05-10 | 2022-11-01 | 嘉兴市绿能环保科技有限公司 | Kitchen waste treatment process |
| CN116114569A (en) * | 2022-12-22 | 2023-05-16 | 国投信开水环境投资有限公司 | Nutrient soil and preparation method and application thereof |
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