CN109455886A - A kind of town road sewage water treatment method and processing system - Google Patents

Abstract

The present invention relates to a kind of town road sewage water treatment method and processing systems comprising passes through the sequentially connected grid maker of pipeline, primary sedimentation pond, lye pond, pH conditioning tank, oxidation ditch, secondary sedimentation tank and disinfecting tank.Sewage successively passes through grid maker filtering, primary precipitation is carried out in primary sedimentation pond, hydrolysis occurs in lye pond, is adjusted to neutrality in pH conditioning tank, biodegrade is carried out in oxidation ditch, progress secondary precipitation and the sterilization that carries out disinfection in disinfecting tank in secondary sedimentation tank, eventually become can direct emission water purification.The present invention has the effect of to effectively remove greasy dirt, tire dust and some other organic pollutant in road sewage.

Description

A kind of town road sewage water treatment method and processing system

Technical field

The present invention relates to the technical fields of municipal wastewater processing, more particularly, to a kind of town road sewage water treatment method and Processing system.

Background technique

Can all there be a municipal Storm-water sewer below town road, when fine day and rainfall, the fine day sewage of roadside The Storm-water sewer under municipal pipeline will be entered from the inlet for stom water by town road with rainwater when rainfall, be then exhausted directly to certainly Right water body.

Under normal circumstances, due to constantly having vehicle frequently to travel on road, road usually can all accumulate greasy dirt, tire dust With some other organic dirt.When raining, these pollutants finally lead to as rainwater enters inlet for stom water and reaches in Storm-water sewer It crosses Storm-water sewer to enter in natural water, natural water is caused seriously to pollute.Moreover, because the scope of activities of the mankind is increasingly Greatly, it is also easy to accumulate the human being's production organic pollutants such as generated nitrogen phosphorus in the process, these organic pollutants on usual road surface It can enter together in the Storm-water sewer below town road with rainwater, finally entering makes water eutrophication in natural water, no Conducive to the animals and plants normal growth in water body.

One publication No. is that the patent of CN106927586A discloses a kind of urban rainwater sewage water purification system and its purification The method of water.The urban rainwater sewage disposal system is set in the rainwater Bilge of urban green belts, the urban rainwater sewage Processing system includes: eco-filtration layer, purification well, sewer；The eco-filtration layer and purification well location in the top of sewer, And eco-filtration pond is set to the purification well outer periphery, the purification well and the water passage, and the sewer Pipeline extend into the bottom center of the purification well, the pipeline opening of the sewer is higher than the rest part of purification bottom, Recessed channel is formed between the closing of the inner wall and sewer of purification well.

Urban rainwater sewage in above-mentioned prior art is entered by flowing into metalling after lawn, road collect It is flowed into after metalling primary filtration inside purification well, the sewage that purification well handles primary filtration passes through the filter hole mistake of clear water tanks It is flowed into after filter in purification well, by the absorption and filtering of active carbon (or gravel) inside purification well, flows into water storage after secondary filter Area, the water of storage area flow into outlet conduit after precipitating and are discharged into river water, realize that sewage purification utilizes.

Above-mentioned prior art has the following deficiencies: that urban rainwater sewage only passes through filtration treatment twice, and city rain Fluid contaminants and dust particles in water sewage can not be removed by filtering, greasy dirt, tire dust in urban rainwater sewage It still can be finally directly discharged into river water with some other organic dirt, cause water pollution.

Summary of the invention

The object of the present invention is to provide a kind of town road sewage water treatment method and processing systems, and having can effectively remove The effect of greasy dirt, tire dust and some other organic pollutant in the sewage of road.

Above-mentioned technical purpose of the invention has the technical scheme that

A kind of town road sewage water treatment method and processing system, comprising the following steps:

Step 1, grid filtration is filtered town road sewage by town road sewage transport by grid maker；Step 2, primary deposition will pass through in the town road sewage discharge to primary sedimentation pond of grid maker filtering, precipitation process 3-6 hours； Step 3, basic hydrolysis makes town road sewage exist in the town road sewage transport to lye pond on primary sedimentation pond upper layer Hydrolyzed under basic conditions 2-3 hours；Step 4, pH is adjusted, by the town road sewage transport to pH conditioning tank in lye pond, Adjusting pH range is 7-8；Step 5: biodegrade is reacted in the town road sewage transport to oxidation ditch in pH conditioning tank 2-4 hours；Step 6: secondary precipitation stands the town road sewage transport of fully reacting in oxidation ditch to secondary sedimentation tank Precipitating 2-4 hours；Step 7, disinfection and sterilization, by the town road sewage transport to disinfecting tank on secondary sedimentation tank upper layer, Disinfection and sterilization is handled 2 hours.Step 8: discharge purified water, by disinfecting tank disinfection and sterilization treated town road sewage Become water purification, water purification is directly discharged in natural water.

By using above-mentioned technical proposal, town road sewage is entered in sewer pipe by the inlet for stom water of road both sides, Sewage in sewer pipe first passes through grid maker and carries out primary filtration, removes larger-size solid impurity in sewage；By lattice The sewage of grid machine filtering, which is transported in primary sedimentation pond, carries out primary deposition, makes lesser by the size of grid maker in sewage Solid impurity sedimentation further removes the solid impurity in sewage；

The sewage on primary sedimentation pond upper layer is transported to again in lye pond, the ester under the alkaline environment in lye pond, in sewage Hydrolysis or neutralization reaction occur for the ingredients such as the esters auxiliary agent in type organic, organic acid and rubber dust, so as to incite somebody to action Some macromolecular polyesters substance decompositions smaller at molecular weight, more fatty acid salt and alcohol, help to improve oxidation ditch Degradation efficiency of the middle microorganism to organic matter；

In addition, the esters auxiliary agent in rubber dust can form micropore on rubber dust after hydrolysis occurs, to make rubber Dust becomes microporous graininess and is more conducive to micro- when the dust of more microporous particles shapes carries out oxygenolysis in oxidation ditch Biological and remaining Adsorption of Organic is on rubber dust, to improve the degradation efficiency in oxidation ditch；

Oxidation ditch is a kind of active sludge processing system, and aeration tank is in closed irrigation canals and ditches type, so different on hydraulic flow state In traditional activated sludge process, it is a kind of end to end cyclic aeration irrigation canals and ditches, it is in addition to applying biological treatment by sewage In the oxidation operations of various complexity be degraded to simple substance, also there is efficient dephosphorization denitrogenation ability, so as to efficient Complicated organic matter and nitrogen phosphorus compound, sewage treatment in degradation sewage is more thorough.

Sewage is handled after the microbiological oxidation degradation in oxidation ditch using secondary precipitation and disinfection and sterilization, can be with Remaining solid impurity and bacterium noxious material in sewage are more completely removed, obtained water purification degree of purity is more preferable, more to environment It is friendly.

Further preferably are as follows: the grid filtration in the step 1 includes coarse rack filtering and fine fack filtering, town road Sewage first passes through coarse rack and carries out coarse filtration, is then delivered to fine fack again and is carefully filtered.

By using above-mentioned technical proposal, the town road sewage conveyed from sewer pipe first passes through coarse rack mistake Filter removes the solid waste being washed into sewer pipe in sewage, is then carefully filtered sewage transport to fine fack, into one Larger-size granulated solid impurity in step removal sewage, the double-filtration of grid maker can be by larger-size solid impurity Removably more thoroughly, convenient that subsequent removal pollutant process is carried out to sewage.

Further preferably are as follows: the primary sedimentation pond in the step 2 is rotational flow grit chamber.

By using above-mentioned technical proposal, rotational flow grit chamber is using mechanical force control flow-shape and flow velocity, accelerates sand The precipitating of grain and the sand-catching apparatus for taking away organic matter with water flow.Rotational flow grit chamber can make miscellaneous by the solid granulates of fine fack Matter rapid precipitation further removes the solid impurity of the smaller size in sewage.

Further preferably are as follows: the lye in the step 3 in lye pond is molten using the mixing of calcium hydroxide and sodium hydroxide The molar fraction ratio of liquid, calcium hydroxide and sodium hydroxide is 1:1.5.

By using above-mentioned technical proposal, the lye in lye pond is formed by sodium hydroxide and calcium hydroxide mixed dissolution, Sodium hydroxide and Strong oxdiative calcium can both provide strong alkaline condition, and raw material is easy to get and at low cost.Fatty acid radical or rubber in greasy dirt The fatty acid radical that esters auxiliary agent hydrolyzes in rubber powder dirt is usually all polymer, all has longer carbochain, these have length The fatty acid calcium precipitating for being insoluble in water can be all formed after the fatty acid radical and calcium binding of carbochain, so as to further remove Organic pollutant in sewage mitigates the organic matter degradation load of oxidation ditch, has the dirty organic pollutants of good removal Effect.

Further preferably are as follows: strainer is installed at the liquid outlet in the lye pond in the step 3.

By using above-mentioned technical proposal, strainer is installed at the liquid outlet in lye pond, strainer can will generate in lye pond The fatty acid calcium for being insoluble in water retained, prevent the fatty acid calcium for being insoluble in water from entering in oxidation pond the oxygen for interfering microorganism Change degradation.

Further preferably are as follows: the strainer mesh number is not less than 2500 mesh.

By using above-mentioned technical proposal, since the fatty acid radical in sewage is all the polymer of macromolecule substantially, because The average grain diameter of this fatty acid calcium generated can be bigger than the average grain diameter of precipitated calcium carbonate (winnofil), and lightweight fatty acid The maximum average grain diameter of calcium is 5 μm, with reference to the general mistake sieve mesh number in the current country with partial size (μm) table of comparisons it is found that partial size is Corresponding sieve mesh number is 2500 mesh at 5 μm.Therefore, it can guarantee the pore size filter of sieve when strainer mesh number is not less than 2500 mesh Less than 5 μm, it thereby may be ensured that the retention to fatty acid calcium is more thorough.

Further preferably are as follows: the oxidation ditch in the step 5 uses improved oxidation ditch, and oxidation ditch is exposed in the circulation of closure Channeling canal shape, the both ends of oxidation ditch are respectively arranged with inlet and outlet, in oxidation ditch from water inlet along water flowing direction according to Secondary includes the first aerobic zone, the first anoxic zone, the first anaerobic zone, the second aerobic zone, the second anoxic zone and the second anaerobic zone, wherein First aerobic zone and the second anaerobic zone join end to end；Aerator is mounted in first aerobic zone and the second aerobic zone, first lacks Mechanical flow-aid device is installed in oxygen area and the second anoxic zone.

By using above-mentioned technical proposal, it is good that improved oxidation ditch successively carries out aerobic-anaerobic-anaerobism-to sewage Oxygen-anoxic-anaerobism biological treatment.This process not only has good Nitrogen/Phosphorus Removal, and in anaerobism and lacks It can be the organic cracking of macromolecule at the low-molecular-weight organic matter for being easy to aerobic biodegradation under the conditions of oxygen.

Further preferably are as follows: the disinfectant launched in the disinfecting tank in the step 7 is aqueous solution of chlorine dioxide.

By using above-mentioned technical proposal, the sterilizing ability of chlorine dioxide it is strong and be safe from harm to human body and animal and Secondary pollution is not caused to environment, is a kind of Broadspectrum environment-protective type disinfection sanitizer for not generating carcinogen, so as to avoid It carries out disinfection to sewage and generates secondary pollution when sterilizing.

In conclusion the invention has the benefit that

1. the urban road sewage entered in sewer pipe successively passes through grid maker and filters twice, is then sent to primary sedimentation pond It after interior precipitating, then is delivered in lye pond and reaction is hydrolyzed, the solid impurity removal in sewage is more thorough, and in alkaline environment Hydrolysis occurs for the part ester-based organic compound in lower sewage, generates molecular weight smaller, more fatty acid salt and alcohol, and Make to form porous structure in rubber dust particles, helps to improve in oxidation ditch microorganism to the degradation efficiency of organic matter；

2. the lye in lye pond is formed by sodium hydroxide and calcium hydroxide mixed dissolution, with the fatty acid of Long carbon chain in greasy dirt The fatty acid calcium precipitating for being insoluble in water can be all formed after root and calcium binding, it is organic in sewage so as to further remove Pollutant mitigates the organic matter degradation load of oxidation ditch；

3. oxidation ditch is improved oxidation ditch, oxidation ditch successively carries out aerobic-anaerobic-anaerobic-aerobic-anoxic-to sewage The biological treatment of anaerobism not only has good Nitrogen/Phosphorus Removal, and can be macromolecular under anaerobism and anoxia condition For the organic cracking of amount at the low-molecular-weight organic matter for being easy to aerobic biodegradation, the removal ability of organic matter is stronger.

Detailed description of the invention

Fig. 1 is the process flow chart of town road sewage disposal system in the present invention；

Fig. 2 is the structural schematic diagram of town road sewage disposal system in the present invention；；

Fig. 3 is the structural schematic diagram of oxidation ditch in Fig. 2.

In figure, 1, grid maker；11, coarse rack；12, fine fack；13, conveyer belt；2, primary sedimentation pond；3, lye pond；31, Strainer；4, pH conditioning tank；5, oxidation ditch；51, the first aerobic zone；52, the first anoxic zone；53, the first anaerobic zone；54, second best Oxygen area；55, the second anoxic zone；56, the second anaerobic zone；57, aerator；58, mechanical flow-aid device；59, partition wall；6, secondary precipitation Pond；7, disinfecting tank；71, motor；72, agitating shaft；73, paddle；8, water inlet；9, water outlet.

Specific embodiment

Below in conjunction with attached drawing, invention is further described in detail.

It is a kind of town road sewage disposal system disclosed by the invention referring to Fig. 2, including sequentially connected by pipeline Grid maker 1, primary sedimentation pond 2, lye pond 3, pH conditioning tank 4, oxidation ditch 5, secondary sedimentation tank 6 and disinfecting tank 7.

Coarse rack 11 and fine fack 12 are installed, coarse rack 11 and fine fack 12 are tiltedly mounted on grid in grid maker 1 In machine 1, the conveyer belt 13 for carrying residue is mounted at the top of coarse rack 11 and fine fack 12, into grid maker 1 Sewage successively pass through coarse rack 11 and fine fack 12 after be delivered in primary sedimentation pond 2 by conveyance conduit, primary sedimentation pond 2 For rotational flow grit chamber.Lye pond 3 is provided with lye, and strainer 31 is equipped at the liquid outlet in lye pond 3, and 31 mesh number of strainer is no less than 2500 mesh.

Referring to Fig. 3, oxidation ditch 5 is improved oxidation ditch, and oxidation ditch 5 is in the cyclic aeration irrigation canals and ditches shape of closure, oxidation ditch 5 Irrigation canals and ditches center is fixed with partition wall 59, and oxidation ditch 5 is separated into the sewage routeway of head and the tail connection by partition wall 59.The both ends of oxidation ditch 5 point Do not offer water inlet 8 and water outlet 9, in oxidation ditch 5 from water inlet 8 along water flowing direction successively include the first aerobic zone 51, First anoxic zone 52, the first anaerobic zone 53, the second aerobic zone 54, the second anoxic zone 55 and the second anaerobic zone 56.Wherein first is good Oxygen area 51 is connected to from beginning to end with the second anaerobic zone 56, and water inlet 8 is located at the first aerobic zone 51 close to one end of the second anaerobic zone 56, out The mouth of a river 9 is located at 53 middle position of the first anaerobic zone.It is mounted on aerator 57 in first aerobic zone 51 and the second aerobic zone 54, the Mechanical flow-aid device 58 is mounted in one anoxic zone 52 and the second anoxic zone 55.

Disinfecting tank 7 is provided with disinfectant, and disinfectant uses aqueous solution of chlorine dioxide, in order to keep disinfection more thorough, connects The agitating shaft 72 and paddle 73 of the driving of motor 71 are installed in touching sterilization pool 7.

Referring to Fig.1, it is a kind of town road sewage water treatment method disclosed by the invention, the steps include:

Step 1: the sewage transported from sewer pipe is passed through the bottom of grid maker 1 by grid filtration, and sewage successively passes through slightly Grid 11 and fine fack 12 carry out coarse filtration and thin filtering, the residue waste material decibel accumulated on coarse rack 11 and fine fack 12 respectively It is delivered on the conveyer belt 13 at respective top, residue waste material is transported to by rubbish by conveyer belt 13 and is focused at center Reason；

Step 2: primary deposition, by the sewage transport to primary sedimentation pond 2 filtered by grid maker 1, precipitation process 3-6 is small When, solid impurity is deposited in 2 bottom of primary sedimentation pond, is upper layer sewage above solid impurity；

Step 3: basic hydrolysis, by the upper layer sewage transport to lye pond 3 in primary sedimentation pond 2, lye pond 3 is provided with alkali Liquid, lye are mixed solution of the molar fraction than calcium hydroxide and sodium hydroxide for 1:1.5, lye and are passed through in lye pond 3 Sewage volume ratio be 1:2, sewage reacts 2-3 hours in lye pond 3；

Step 4:pH adjust, by lye pond 3 hydrolyze completely after sewage transport to pH conditioning tank 4 in, into conditioning tank 4pH Salt acid for adjusting pH is added to 7-8；

Step 5: biodegrade by the sewage transport to oxidation ditch 5 for mixing up pH in pH conditioning tank 4, reacts 2- in oxidation ditch 5 4 hours.5 design parameter of oxidation ditch are as follows: sewage sludge age 11-14 days, sludge concentration 4000-5000mg/L；

Step 6: secondary precipitation will carry out two in the sewage transport to secondary sedimentation tank 6 flowed out from the water outlet 9 of oxidation ditch 5 Secondary precipitating, sedimentation time are 2-4 hours；

Step 7: disinfection and sterilization uses chlorine dioxide in the sewage transport to disinfecting tank 7 on 6 upper layer of secondary sedimentation tank Aqueous solution carries out disinfection sterilization processing to sewage as disinfectant, handles time 2 h；

Step 8: discharge purified water, the interior sewage for completing disinfection and sterilization of disinfecting tank 7 become the water purification for meeting discharge standard, will be net Water is directly discharged in natural water.

The implementation principle of the present embodiment are as follows: urban road sewage successively passes through grid maker 1 and filters, is then sent to just twice The biggish solid impurity of particle is removed in secondary sedimentation basin 2；Reaction will be hydrolyzed in sewage transport to lye pond 3 again, sewage exists Hydrolysis occurs for the part ester-based organic compound under alkaline environment in sewage, generates smaller, the more fatty acid of molecular weight Sodium and fatty acid calcium, the fatty acid calcium of Long carbon chain are insoluble in water, then can be removed by the strainer 31 at 3 liquid outlet of lye pond；And Make to form porous structure in rubber dust particles, microorganism in oxidation ditch 5 can be improved, the degradation efficiency of organic matter is removed organic The effect of pollutant is more preferable.

This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this All by the protection of Patent Law in the scope of the claims of invention.

Claims (8)

1. a kind of town road sewage water treatment method and processing system, which comprises the following steps:

Step 1, grid filtration is filtered town road sewage by town road sewage transport by grid maker (1)；

Step 2, primary deposition, the town road sewage discharge by grid maker (1) filtering is interior to primary sedimentation pond (2), it sinks It forms sediment and handles 3-6 hours；

Step 3, basic hydrolysis makes municipal administration in the town road sewage transport on primary sedimentation pond (2) upper layer to lye pond (3) Road sewage hydrolyzes 2-3 hours under alkaline condition；

Step 4, pH is adjusted, and is by pH range in the town road sewage transport in lye pond (3) to pH conditioning tank (4), is adjusted 7-8；

Step 5: biodegrade, by the town road sewage transport in pH conditioning tank (4) to oxidation ditch (5), reaction 2-4 is small When；

Step 6: secondary precipitation, it is quiet by the town road sewage transport of oxidation ditch (5) interior fully reacting to secondary sedimentation tank (6) Set precipitating 2-4 hours；

Step 7, disinfection and sterilization disappears in the town road sewage transport on secondary sedimentation tank (6) upper layer to disinfecting tank (7) Malicious sterilization processing 2 hours；

Step 8: discharge purified water, by disinfecting tank (7) disinfection and sterilization, treated that town road sewage becomes water purification, water purification It is directly discharged in natural water.

2. a kind of town road sewage water treatment method according to claim 1 and processing system, it is characterised in that: described Grid filtration in step 1 includes coarse rack (11) filtering and fine fack (12) filtering, and town road sewage first passes through coarse rack (11) coarse filtration is carried out, fine fack (12) is then delivered to again and is carefully filtered.

3. a kind of town road sewage water treatment method according to claim 1 and processing system, it is characterised in that: the step Primary sedimentation pond (2) in rapid 2 is rotational flow grit chamber.

4. a kind of town road sewage water treatment method according to claim 1 and processing system, it is characterised in that: the step Lye in rapid 3 in lye pond (3) uses the mixed solution of calcium hydroxide and sodium hydroxide, and calcium hydroxide and sodium hydroxide rub Your score ratio is 1:1.5.

5. a kind of town road sewage water treatment method according to claim 1 or 4 and processing system, it is characterised in that: institute It states and strainer (31) is installed at the liquid outlet in the lye pond (3) in step 3.

6. a kind of town road sewage water treatment method according to claim 5 and processing system, it is characterised in that: the filter Net (31) mesh number is not less than 2500 mesh.

7. a kind of town road sewage water treatment method according to claim 1 and processing system, feature exist: the step Oxidation ditch (5) in 5 uses improved oxidation ditch, cyclic aeration irrigation canals and ditches shape of the oxidation ditch (5) in closure, oxidation ditch (5) Both ends be respectively arranged with water inlet (8) and water outlet (9), is successively wrapped from water inlet (8) along water flowing direction in oxidation ditch (5) Include the first aerobic zone (51), the first anoxic zone (52), the first anaerobic zone (53), the second aerobic zone (54), the second anoxic zone (55) With the second anaerobic zone (56), wherein the first aerobic zone (51) and the second anaerobic zone (56) join end to end；First aerobic zone (51) and It is mounted on aerator (57) in second aerobic zone (54), machinery is installed in the first anoxic zone (52) and the second anoxic zone (55) Flow-aid device (58).

8. a kind of town road sewage water treatment method according to claim 1 and processing system, it is characterised in that: the step The disinfectant launched in disinfecting tank (7) in rapid 7 is aqueous solution of chlorine dioxide.