CN108383330A - A kind of decentralized type sewage processing unit - Google Patents

A kind of decentralized type sewage processing unit Download PDF

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Publication number
CN108383330A
CN108383330A CN201810269001.4A CN201810269001A CN108383330A CN 108383330 A CN108383330 A CN 108383330A CN 201810269001 A CN201810269001 A CN 201810269001A CN 108383330 A CN108383330 A CN 108383330A
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CN
China
Prior art keywords
pond
nitrification
anoxic pond
nitrification tank
sedimentation basin
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CN201810269001.4A
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Chinese (zh)
Inventor
章武首
朱龙海
安卫军
史璐璐
秦臻
梁右东
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Shaanxi Long Environmental Protection Technology Co Ltd
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Shaanxi Long Environmental Protection Technology Co Ltd
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Priority to CN201810269001.4A priority Critical patent/CN108383330A/en
Publication of CN108383330A publication Critical patent/CN108383330A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/04Disinfection
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The present invention provides a kind of decentralized type sewage processing unit, including sequentially connected regulating reservoir and anaerobic pond, and the first anoxic pond, the first nitrification tank, the second anoxic pond, the second nitrification tank and sedimentation basin are connected in turn after anaerobic pond;Particularly, sewage respectively enters anaerobic pond, the first anoxic pond and the second anoxic pond behind pond after the adjustment, it is provided with the first nitrification liquid reflux mechanism between first anoxic pond and the first nitrification tank, the second nitrification liquid reflux mechanism is provided between second anoxic pond and the second nitrification tank;Additionally there is skimming structure and box structure of cooling down.The device of the invention can guarantee that sewage effluent quality is up to standard steadily in the long term, and device operation energy consumption is low, can connect all devices with PLC, manual intervention is few, and failure rate is low.

Description

A kind of decentralized type sewage processing unit
Technical field
The present invention relates to a kind of sewage-treatment plant more particularly to a kind of decentralized type sewage processing units.
Background technology
The features such as there are total amounts for the sanitary sewage that villages and small towns resident generates greatly, point disperses and small scale, sewage composition is multiple in addition Miscellaneous, applicable technology is few, and the restriction of the factors such as financial fund deficiency, sewage disposal has become the intractable of villages and small towns Water Environmental Synthesis Dredge and asks One of topic, it is extremely urgent to seek the sewage disposal technology for being suitble to apply in villages and small towns.Integrated sewage treating apparatus is integrated with a variety of The function of sewage treatment process has the characteristics that process flow is simple, floor space is small, investment cost is low, operational management is simple, It is especially suitable for the processing of distributing town sewage.But current sewage disposal system is due to design problem, it is difficult to ensure that water quality Can be steady in a long-term up to standard, for example, the Chinese invention patent that number of patent application is CN201410777913.4 discloses one kind A3/ O-MBBR integrated sewage treating apparatus and sewage water treatment method, although its disclosed technical solution can carry out sewage There is the inadequate problem of hydraulic detention time of nitrification liquid measure deficiency or anoxic pond in denitrogenation dephosphorizing, that causes whole device removes total nitrogen It is not strong;In addition, it in anti-nitration reaction, because the nitrification liquid of air lift contains the DO (usually in 1mg/L or more) of higher concentration, makes Nitrification liquid part DO concentration in anti-nitration reaction area is higher, and be unevenly distributed, affect anti-nitration reaction it is abundant into Row.
Invention content
In order to make up for the deficiencies of the prior art, the object of the present invention is to provide a kind of decentralized type sewage processing units, solve Prior art sewage disposal water outlet quality is difficult to problem up to standard steady in a long-term.
In order to achieve the above objectives, the technical solution adopted by the present invention is as follows:
A kind of decentralized type sewage processing unit, including sequentially connected regulating reservoir and anaerobic pond are sequentially connected after anaerobic pond There are the first anoxic pond, the first nitrification tank, the second anoxic pond, the second nitrification tank and sedimentation basin;
Particularly, sewage respectively enters anaerobic pond, the first anoxic pond and the second anoxic pond behind pond after the adjustment, described first The first nitrification liquid reflux mechanism is provided between anoxic pond and the first nitrification tank, second anoxic pond and the second nitrification tank it Between be provided with the second nitrification liquid reflux mechanism;
Particularly, first nitrification liquid reflux mechanism includes stripping tube, outlet pipe, return duct and box of cooling down, and first The part of contaminated water of nitrification tank enters box of cooling down through stripping tube, and the foul water fraction cooled down in box is back to the first nitrification through return duct Pond partly enters the first anoxic pond through outlet pipe, and the box of cooling down includes hollow box body, and first partition is provided in box body And second partition, second partition is vertical with first partition and box body is divided into three spaces, wherein first partition and box body shape At space in, box body bottom is machined with sparge pipe, and sparge pipe is connected to stripping tube, and water inlet is machined in first partition;The In the two spaces that two partition boards are formed with box body, box body side is machined with water outlet and refluxing opening, water outlet and refluxing opening respectively It is connect respectively with outlet pipe and return duct, spout hole, height of the spout hole apart from box body bottom is machined on second partition Height higher than water outlet apart from box body bottom;
Particularly, the face center of the sedimentation basin is provided with skimming structure, skimming structure includes adsorption section, hollow Storage part and controller are suspended from storage part in the adsorption section, and storage part is fixed on sedimentation basin center of top, storage part bottom Portion is communicated with sludge pipe, and adsorption section is controlled by controller and carries out Rotary adsorption.
Further, it is provided with aeration plate in second nitrification tank, in the company of second nitrification tank and sedimentation basin Passage port is provided with inclined board-like grid, the board-like grid of gas outlet face of aeration plate.
Further, the regulating reservoir includes sequentially connected preconditioning pond and buffer pool, the setting of preconditioning pond inlet There is filtering fence, agitating device is provided in buffer pool.
Further, decrement pond and storage pool are connected in turn after the sedimentation basin, clear water reserviors are provided with outside sedimentation basin, It is provided with sandfiltration pot between sedimentation basin and clear water reserviors, is discharged after the water of clear water reserviors again sterilized device disinfection, the sludge of sedimentation basin Part enters anaerobic pond through sludge pipe, and excess sludge enters decrement pond.
Further, it is provided with bionic filler in the anaerobic pond, is all provided in first nitrification tank and the second nitrification tank It is equipped with biologic packing material.
Preferably, the aperture of board-like grid is less than the diameter of biologic packing material.
Further, the water inlet of the first anoxic pond and the second anoxic pond is equipped with dashpot, be equipped in dashpot with The opposite baffle of water inlet, buffering trench bottom are equipped with multiple liquid-leaking nozzles.
Further, it is provided with air inlet pipe on the pipeline of stripping tube, wind turbine and flowmeter are provided in air inlet pipe.
Further, sedimentation basin bottom is provided with sludge hopper, and sludge hopper is connected to sludge pipe.
Further, sewage backflow mechanism is equipped between sewage sludge storage pond and regulating reservoir.
Compared with prior art, the present invention has the following technical effect that:
The device of the invention can guarantee that sewage effluent quality is up to standard steadily in the long term, mainly be realized by following 4 points:
A, sewage respectively enter anaerobic pond, the first anoxic pond and the second anoxic pond behind pond after the adjustment, realize 3 points of water inlets, The first nitrification liquid reflux mechanism is provided between first anoxic pond and the first nitrification tank, the second anoxic pond and the second nitrification tank it Between be provided with the second nitrification liquid reflux mechanism, realize the reflux of two step nitrification liquids, it is innovative to introduce " 3+2 " into water and nitrification Pattern so that the present apparatus can be steady in a long-term up to standard to the removal effect of total nitrogen in sewage;
B, the present invention is between the first nitrification tank and the first nitrification liquid reflux mechanism, the second nitrification tank and the second nitrification liquid time A box of cooling down is each provided between stream mechanism, the nitrification liquid that nitrification liquid reflux mechanism air lift from nitrification tank goes out contains largely DO is entered in cooling down box by stripping tube and is stayed for some time, and the DO in nitrification liquid discharges into the atmosphere from gas outlet so that Nitrification liquid enters DO concentration in the mixed liquor after anoxic pond and is less than 0.5mg/L, the anti-nitration reaction being conducive in anoxic pond so that lacks Reaction in oxygen pond can carry out steadily in the long term;
C, the present invention are provided with skimming structure on sedimentation basin, can dispose sedimentation basin in time and show mud scum, avoid shadow It rings to the concentration of suspension in water outlet, ensures that effluent quality is up to standard for a long time;
D, the present invention is provided with board-like grid at the second nitrification tank and sedimentation basin connection, since aeration plate constantly washes away plate Formula grid so that the sewage for entering sedimentation basin has certain momentum, ensures water outlet in stable flow, a concentration range It is interior, and be not easy to plug, ensure that device can be run steadily in the long term, is further ensured that effluent quality.
Above-mentioned these technical characteristics combine, and common guarantee realizes the present apparatus treated that sewage quality can reach steadily in the long term Target technique effect.
In addition, the device of the invention operation energy consumption is low, all devices can be connect with PLC, manual intervention is few, failure rate It is low.
The invention will be further described in the following with reference to the drawings and specific embodiments.
Description of the drawings
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Fig. 2 is box structural schematic diagram of cooling down;
Fig. 3 is skimming structural schematic diagram.
In figure:1- regulating reservoirs, 2- anaerobic ponds, the first anoxic ponds of 3-, the first nitrification tanks of 4-, the second anoxic ponds of 5-, 6- second Nitrification tank, 7- sedimentation basins, the first nitrification liquids of 8- reflux mechanism, the second nitrification liquids of 9- reflux mechanism, 10- skimming structures, 11- spoil disposals Pipe, 12- precondition pond, 13- buffer pools, and 14- is reduced pond, 15- storage pools, 16- bionic fillers, 17- biologic packing materials, 18- collection mud Bucket, 19- sewage backflow pipes;
81- stripping tubes, 82- outlet pipes, 83- return ducts, 84- cool down box, 841- first partitions, 842- second partitions, 843- sparge pipes, 844- water inlets, 845- water outlets, 846- refluxing openings, 847- spout holes, 85- air inlet pipe, 86- wind turbines, 87- Flowmeter;
The adsorption sections 101-, 102- storage parts.
Specific implementation mode
In order to more fully understand the present invention technology contents, with reference to specific embodiment to technical scheme of the present invention into One step introduction and explanation, but not limited to this.
Embodiment 1:
The present embodiment provides a kind of decentralized type sewage processing units, including sequentially connected regulating reservoir 1 and anaerobic pond 2, detest It is connected with the first anoxic pond 3, the first nitrification tank 4, the second anoxic pond 5, the second nitrification tank 6 and sedimentation basin 7 behind oxygen pond 2 in turn;
Due to being chemically reacted accordingly in anaerobic pond, the first anoxic pond and the second anoxic pond, in order not to be produced to it It is raw to influence, ensure the sewage flowed into a stable flow, concentration range, and also to give the first anoxic pond and second It is mainly organic matter that anti-nitration reaction in anoxic pond, which supplements a certain amount of carbon source), sewage respectively enters anaerobism behind pond 1 after the adjustment Pond 2, the first anoxic pond 3 and the second anoxic pond 5 are realized 3 points of water inlets, are generally realized with water pipe by water pump.In the first anoxic The first nitrification liquid reflux mechanism 8 is provided between pond 3 and the first nitrification tank 4, between the second anoxic pond 5 and the second nitrification tank 6 It is provided with the second nitrification liquid reflux mechanism 9, by nitrification liquid reflow treatment twice so that effect is dispelled more to total nitrogen in sewage Good, effluent quality is more stable.
First nitrification liquid reflux mechanism 8 includes stripping tube 81, outlet pipe 82, return duct 83 and box 84 of cooling down, the first nitre The part of contaminated water for changing pond 4 enters through stripping tube 81 and cools down box 84, and the foul water fraction cooled down in box 84 is back to the through return duct 83 One nitrification tank 4 partly enters the first anoxic pond 3 through outlet pipe 82, and box 84 of cooling down includes hollow box body, is provided in box body First partition 841 and second partition 842, second partition 842 is vertical with first partition 841 and box body is divided into three spaces, Wherein, in the space that first partition 841 is formed with box body, box body bottom is machined with sparge pipe 843, sparge pipe 843 and stripping tube 81 are connected to, and water inlet 844 is machined in first partition 841;In the two spaces that second partition 842 is formed with box body, box body one Side is machined with water outlet 845 and refluxing opening 846 respectively, water outlet 845 and refluxing opening 846 respectively with outlet pipe 82 and return duct 83 Connection, is machined with spout hole 847 on second partition 842, height of the spout hole 847 apart from box body bottom higher than water outlet 845 away from Height from box body bottom;Second nitrification liquid reflux mechanism 9 is identical as the first nitrification liquid reflux 8 structure of mechanism;Nitrification liquid flows back The nitrification liquid that mechanism air lift from nitrification tank goes out contains a large amount of DO, and entering outgassing box by stripping tube stays for some time, nitre The DO changed in liquid discharges into the atmosphere from gas outlet so that nitrification liquid enters DO concentration in the mixed liquor after lacking pond and is less than 0.5mg/ L, the anti-nitration reaction being more favorable in anoxic pond, denitrification effect are more preferable.
The face center of sedimentation basin 7 is provided with skimming structure 10, skimming structure 10 includes adsorption section 101, hollow deposits Storage portion 102 and controller are suspended from storage part 102 in adsorption section 101, and storage part 102 is fixed on 7 center of top of sedimentation basin, 102 bottom of storage part is communicated with sludge pipe 11, and adsorption section 101 is controlled by controller and carries out Rotary adsorption.The effect of this part It is:Anaerobic reaction occurs because of anoxic for sedimentation basin bottom, and methane, nitrogen of generation etc. carry sludge during rising, Thus mud scum can be constantly accumulated on the surface layer of sedimentation basin, in order to dispose these mud scums in time, avoid influencing in water outlet Concentration of suspension, be provided with skimming structure 10.
It is provided with aeration plate in the second nitrification tank 6, is provided with and inclines at the communication port of the second nitrification tank 6 and sedimentation basin 7 Oblique board-like grid, the board-like grid of gas outlet face of aeration plate so that the sewage for entering sedimentation basin has certain momentum, protects Card water outlet is not easy to plug in a stable flow, concentration range, ensures that device can be run steadily in the long term, further Ensure effluent quality.
In order to improve the stability of the sewage in injection anaerobic pond, the first anoxic pond and the second anoxic pond, regulating reservoir 1 includes Sequentially connected preconditioning pond 12 and buffer pool 13, in order in advance dispose solid refuse in advance, preconditioning pond 12 enters It is provided with filtering fence at mouthful, agitating device is provided in buffer pool 13, the sewage in regulating reservoir is sufficiently stirred.
In order to handle the organic matter in sludge as possible, the total amount of sludge is reduced, is connected in turn and subtracts after sedimentation basin 7 Pond 14 and storage pool 15 are measured, clear water reserviors are provided with outside sedimentation basin 7, in order to clear up the impurity being discharged in water more thorough, is sunk Sandfiltration pot is provided between shallow lake pond 7 and clear water reserviors, filled respectively from bottom to top in sandfiltration pot thick river sand average grain diameter 0.5mm with On), middle river sand average grain diameter is in 0.35~0.5mm) and thin river sand average grain diameter in 0.25~0.35mm), topmost stays in tank There is the protection height of 30cm or so.From the water that sedimentation basin flows out from sandfiltration pot lower end is flow to, pass through thick river from bottom to top in tank Sand, middle river sand and thin river sand are finally discharged from sandfiltration pot upper end, are pumped into ultraviolet sterilizer under the power of water pump, by purple Outer row after outer disinfection, suspended matter should be no more than 20mg/L in general in water, final to ensure in conjunction with the effect of skimming structure before Suspended matter can reach in water outlet《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) level-one emission standard A.
The sludge part of sedimentation basin 7 enters anaerobic pond 2 through sludge pipe, and excess sludge enters decrement pond 14.
It is provided with bionic filler 16 in anaerobic pond 2, biologic packing material is both provided in the first nitrification tank 4 and the second nitrification tank 6 17.To ensure that effect, the aperture of board-like grid are less than the diameter of biologic packing material.
The water inlet of first anoxic pond 3 and the second anoxic pond 5 is equipped with dashpot, is equipped with and water inlet phase in dashpot To baffle, buffering trench bottom is equipped with multiple liquid-leaking nozzles, and the sewage having just enter into the first anoxic pond 3 and the second anoxic pond 5 carries Certain momentum flows after impact is on baffle in dashpot back and forth, to reduce the flow velocity of sewage, meanwhile, sewage passes through Buffer trench bottom liquid-leaking nozzle enter the first anoxic pond 3 and the second anoxic pond 5, into also more uniformly.
It is provided with air inlet pipe 85 on the pipeline of stripping tube 81, wind turbine 86 and flowmeter 87 are provided in air inlet pipe 85.Pass through Air is sent into stripping tube by wind turbine 86, and flowmeter 87 is used for measuring 86 air quantity of wind turbine.
7 bottom of sedimentation basin is provided with sludge hopper 18, and sludge hopper 18 is connected to sludge pipe 11, in storage pool 15 and regulating reservoir 1 Between be equipped with sewage backflow pipe 19.
The bionic filler of the present invention, using a kind of fixed bionic aquatic weed filler hung in anaerobic pond, these are filled out Material includes the intermediate several fibers monomer restricted, be fixed on intermediate rope.Fiber monomer is cyclic annular radioactivity structure, fibrae circulares list Body, on the rope of centre, is made of several fibrae circulares monomers and intermediate rope by knitting arrangement, has great specific surface area, can Up to 10 times of Conventional combination filler.Since its large specific surface area is generally in 800m2/m3), a large amount of anaerobic bacteria can be adhered at that time, Anaerobic bacteria can consume a small amount of DO in the first anaerobic pond in metabolic processes, ensure that the strictly anaerobic environment of anaerobic pond, It provides the foundation for subsequent anaerobic phosphorus release.Biologic packing material in the first nitrification tank and the second nitrification tank is general to use MBBR fillers.The packing ratio for saving filler is 0.25~0.5 (total volume of the floating stuffing of addition and the first nitrification tank and second The ratio of the sum of the volume of nitrification tank).
The present invention using above-mentioned sewage-treatment plant come the method for treated sewage for:
First sewage is imported in regulating reservoir, most solid sundries in sewage are conditioned the filtering of the water inlet in pond Fence filters out;The sewage in buffer pool is stirred at rabbling mechanism interval, keeps the concentration of wastewater in buffer pool roughly the same;Then Sewage is pumped into anaerobic pond with water pump, then passes through the first anoxic pond, the first nitrification tank, the second anoxic pond, the second nitre successively Change pond and sedimentation basin.Part nitrification liquid in first nitrification tank enters box of cooling down after the first nitrification liquid reflux mechanism air lift, The first anoxic pond is back to after cooling down in box of cooling down;Similarly, the part nitrification liquid in the second nitrification tank also passes through the second nitrification Liquid flows back after mechanism air lift, is back to the second anoxic pond after outgassing again in box of cooling down;Upper layer sewage in sedimentation basin enters In clear water reserviors, partial sludge flows back into anaerobic pond by sludge reflux mechanism, and remaining sludge enters dirt after being reduced pond Mud storage pool;Water in clear water reserviors is filtered through sandfiltration pot, is discharged after the sterilizer disinfection through being installed on outlet pipe;Storage pool Interior supernatant is directed in regulating reservoir.
Anaerobic bacteria in anaerobic pond decomposes the organic matter in sewage, the phosphorus containg substances of solid is discharged into sewage, simultaneously Also a part of nitrogen substance is nitrified;Sewage in anaerobic pond after about 1 hour, into the first anoxic pond;In first anoxic pond Anti-nitration reaction is carried out, is nitrogen by nitrate ion denitrification, excludes;Sewage is anti-in the first anoxic pond progress denitrification About 1.5 are answered as a child to enter the first nitrification tank.The phosphorus containg substances in aerobic bacteria treated sewage in first nitrification tank, and will P elements cure, while being nitrate ion by ammonia radical ion nitrification.Meanwhile the first part of contaminated water in nitrification tank is by the first nitre Change liquid and flow back mechanism air lift to cooling down in box, after the nitrification liquid after air lift is cooled down in box of cooling down, enters back into the first anoxic pond Interior carry out anti-nitration reaction, more preferably, effluent quality is more stable for efficiencies of nitrogen removal.Sewage in the first nitrification tank after about 3 hours, Into the second anoxic pond, continue anti-nitration reaction.Sewage subsequently enters the after the second anoxic pond stops 1.5 as a child Di-nitrated pond does not remove complete nitrogen substance and continues nitrification in the second nitrification tank at nitrate ion, and by the second nitre Change liquid and flow back mechanism air lift to cooling down in box, after the nitrification liquid after air lift is cooled down in box of cooling down, enters back into the second anoxic pond Interior carry out anti-nitration reaction, efficiencies of nitrogen removal is more preferably;Sewage about after the second nitrification tank 2 hours, enters sedimentation basin and is sunk It forms sediment.For sewage after sedimentation basin precipitates 2 hours, the supernatant liquor of sedimentation basin is transferred to clear water reserviors, after sandfiltration pot filters, By sterilizing, finally it is discharged or utilizes;The precipitation soil of sedimentation basin lower layer carries out nitrification in decrement pond, reduces 50~60% volume greatly reduces the weight of sludge, is finally transferred to be carried out inside and outside storage pool.When the upper layer of sedimentation basin When assembling more sludge, skimming structure cleans up the soil for being suspended in upper layer, ensure that the concentration of suspension of the water of discharge Reach discharging standards.
It should be noted that:Nitrogen pollutant (mainly ammonia nitrogen) in sewage passes through nitrification in the first nitrification tank It is converted into nitrate nitrogen, and nitrification is to have converted the form of nitrogen, also not really except the nitrogen in decontaminated water, thus needs to pass through Denitrification converts nitrate nitrogen to nitrogen, ensures that the total nitrogen in water outlet is up to standard, in the present invention, the nitrate nitrogen of the first nitrification tank It enters and carries out anti-nitration reaction in the first anoxic pond, the nitrate nitrogen in the second nitrification tank is entered in the second anoxic pond and carried out instead Nitration reaction;In addition, without fully changing the nitrogenous object of form in the second nitrification tank after nitration reaction, then flow back into second Denitrification is carried out in anoxic pond, is removed to convert nitrate nitrogen to nitrogen;In addition, can also remove part in anaerobic pond Nitrogen, common guarantee effluent quality.
Meanwhile sewage disposal process of the invention, water inlet, water outlet are diagonally positioned.In addition, the present invention can will own Equipment is electrically connected with PLC, is greatly facilitated and is controlled it.
Comparative example 1:
For influent quality with embodiment 1, this comparative example 1 provides a kind of sewage-treatment plant, structure and the dress in embodiment 1 The structure set is identical, and unique difference is that the first nitrification liquid return current machine is not arranged between the first nitrification tank and the first anoxic pond Structure.
Sewage water treatment method is, with sewage water treatment method in embodiment the step of is almost the same, and unique difference is dirty After water has carried out nitration reaction in the first nitrification tank, enter directly into the second anoxic pond, not flow back into the first anoxic pond into Row anti-nitration reaction.
Embodiment 2:
The present embodiment provides a kind of sewage-treatment plants, identical as 1 structure of embodiment, and influent quality is different.
Comparative example 2:
For the influent quality of this comparative example 2 with embodiment 2, difference is box structure of not cooling down.
Embodiment 3:
The present embodiment provides a kind of sewage-treatment plants, identical as 1 structure of embodiment, intake with embodiment 1 and embodiment 2 Water quality is different.
Comparative example 3:
For the influent quality of this comparative example 2 with embodiment 3, difference is do not have skimming structure.
Above-mentioned all examples, device, which is run, to be up to 1 month, and testing result is as follows:
After operation one month, the COD of embodiment 1crFor 29mg/L, ammonia nitrogen 1.5mg/L, and the COD of comparative example 1crFor 34mg/L, ammonia nitrogen 3mg/L, the present invention can guarantee long-term effluent quality.
By above table data it is found that sewage-treatment plant provided by the present invention, to the efficiencies of nitrogen removal of sewage, long-term Effluent quality effect it is more preferable.
It is above-mentioned only with embodiment come the technology contents that further illustrate the present invention, in order to which reader is easier to understand, but not It represents embodiments of the present invention and is only limitted to this, any technology done according to the present invention extends or recreation, by the present invention's Protection.

Claims (10)

1. a kind of decentralized type sewage processing unit, including sequentially connected regulating reservoir (1) and anaerobic pond (2), which is characterized in that detest Be connected in turn behind oxygen pond (2) the first anoxic pond (3), the first nitrification tank (4), the second anoxic pond (5), the second nitrification tank (6) with And sedimentation basin (7);
Sewage respectively enters anaerobic pond (2), the first anoxic pond (3) and the second anoxic pond (5) after pond (1) after the adjustment, described The first nitrification liquid reflux mechanism (8) is provided between one anoxic pond (3) and the first nitrification tank (4), in second anoxic pond (5) And second be provided with the second nitrification liquid reflux mechanism (9) between nitrification tank (6);
The first nitrification liquid reflux mechanism (8) includes stripping tube (81), outlet pipe (82), return duct (83) and box of cooling down (84), the part of contaminated water of the first nitrification tank (4) enters box (84) of cooling down, the foul water fraction in box of cooling down (84) through stripping tube (81) It is back to the first nitrification tank (4) through return duct (83), partly enters the first anoxic pond (3), the box of cooling down through outlet pipe (82) (84) include hollow box body, be provided with first partition (841) and second partition (842) in box body, second partition (842) with First partition (841) is vertical and box body is divided into three spaces, wherein in the space that first partition (841) is formed with box body, Box body bottom is machined with sparge pipe (843), and sparge pipe (843) is connected to stripping tube (81), be machined in first partition (841) into The mouth of a river (844);In the two spaces that second partition (842) and box body are formed, box body side be machined with respectively water outlet (845) and Refluxing opening (846), water outlet (845) and refluxing opening (846) are connect with outlet pipe (82) and return duct (83) respectively, second partition (842) spout hole (847) is machined on, height of the spout hole (847) apart from box body bottom is higher than water outlet (845) distance The height of box body bottom;The second nitrification liquid reflux mechanism (9) is identical as the first nitrification liquid reflux mechanism (8) structure;
The face center of the sedimentation basin (7) is provided with skimming structure (10), skimming structure (10) include adsorption section (101), Hollow storage part (102) and controller, the adsorption section (101) is interior to be suspended from storage part (102), and storage part (102) is solid Due to sedimentation basin (7) center of top, storage part (102) bottom is communicated with sludge pipe (11), and adsorption section (101) pass through controller control System carries out Rotary adsorption.
2. decentralized type sewage processing unit as described in claim 1, which is characterized in that the setting in second nitrification tank (6) There is aeration plate, inclined board-like grid, aeration plate are provided at the communication port of second nitrification tank (6) and sedimentation basin (7) The board-like grid of gas outlet face.
3. decentralized type sewage processing unit as described in claim 1, which is characterized in that the regulating reservoir (1) includes being sequentially connected Preconditioning pond (12) and buffer pool (13), preconditioning pond (12) inlet be provided with filtering fence, setting in buffer pool (13) There is agitating device.
4. decentralized type sewage processing unit as described in claim 1, which is characterized in that be sequentially connected after the sedimentation basin (7) There are decrement pond (14) and storage pool (15), is provided with clear water reserviors outside sedimentation basin (7), sedimentation basin (7) is provided between clear water reserviors Sandfiltration pot is discharged after the water of clear water reserviors again sterilized device disinfection, and the sludge part of sedimentation basin (7) enters anaerobic pond through sludge pipe (2), excess sludge enters decrement pond (14).
5. decentralized type sewage processing unit as described in claim 1, which is characterized in that be provided in the anaerobic pond (2) bionical It is both provided with biologic packing material (17) in filler (16), first nitrification tank (4) and the second nitrification tank (6).
6. decentralized type sewage processing unit as claimed in claim 5, which is characterized in that the aperture of board-like grid is less than biologic packing material Diameter.
7. decentralized type sewage processing unit as described in claim 1, which is characterized in that the first anoxic pond (3) and the second anoxic pond (5) water inlet is equipped with dashpot, and the baffle opposite with water inlet is equipped in dashpot, and buffering trench bottom is equipped with multiple leakages Fluid apertures.
8. decentralized type sewage processing unit as described in claim 1, which is characterized in that be provided on the pipeline of stripping tube (81) into Tracheae (85) is provided with wind turbine (86) and flowmeter (87) in air inlet pipe (85).
9. decentralized type sewage processing unit as described in claim 1, which is characterized in that sedimentation basin (7) bottom is provided with sludge hopper (18), sludge hopper (18) is connected to sludge pipe (11).
10. decentralized type sewage processing unit as described in claim 1, which is characterized in that storage pool (15) and regulating reservoir (1) it Between be equipped with sewage backflow pipe (19).
CN201810269001.4A 2018-03-29 2018-03-29 A kind of decentralized type sewage processing unit Pending CN108383330A (en)

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Application publication date: 20180810