CN108046516A - A kind of OCO activated sludge modified technique and device for being used to strengthen urban wastewater treatment - Google Patents

A kind of OCO activated sludge modified technique and device for being used to strengthen urban wastewater treatment Download PDF

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CN108046516A
CN108046516A CN201711211296.1A CN201711211296A CN108046516A CN 108046516 A CN108046516 A CN 108046516A CN 201711211296 A CN201711211296 A CN 201711211296A CN 108046516 A CN108046516 A CN 108046516A
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sludge
oco
eddy flow
wastewater treatment
urban wastewater
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CN108046516B (en
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徐银香
王勇
曾涛
胡光忠
柳忠彬
刘少北
刘明
谢君科
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Sichuan University of Science and Engineering
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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
    • C02F11/00Treatment of sludge; Devices therefor
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • 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
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/06Nutrients for stimulating the growth of microorganisms
    • 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
    • C02F3/301Aerobic and anaerobic treatment in the same reactor
    • 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
    • C02F3/308Biological phosphorus removal

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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)
  • Treatment Of Sludge (AREA)
  • Physical Water Treatments (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Activated Sludge Processes (AREA)

Abstract

The present invention relates to sanitary wastewater processing and sludge treatment field, are specially a kind of town sewage OCO activated sludge modified techniques.The technique includes OCO sewage disposal systems and reflux bypass sludge releases carbon system two parts.OCO sewage disposal systems are made of grid, primary sedimentation tank, OCO biochemistry pools and secondary settling tank;Reflux bypass sludge, which releases carbon system and breaks scattered device by sludge concentration tank, ultrasonic treatment unit and eddy flow, to be formed.The present invention is that embedded reflux bypass ultrasound rotational flow releases carbon system on the basis of traditional OCO waste water treatment technologies, by strong rotational-flow shearing field, centrifugal field and and ultrasonic cavitation strengthen OCO biochemistry pools biochemical activity, it improves the effect of biological carbon and phosphorous removal and reduces the purpose of mud decrement, to realize that sludge internal carbon source recycles.So as to improve the effect of biochemical activity and mud decrement, reduce sewage disposal and sludge treatment cost.

Description

A kind of OCO activated sludge modified technique and device for being used to strengthen urban wastewater treatment
Technical field
The present invention relates to urban life wastewater treatment and technical field of sludge disposal, are specially a kind of dirty for strengthening cities and towns The OCO activated sludge modified technique and device of water process.
Background technology
OCO techniques are a kind of active sludge processing systems being combined with anaerobic- anoxic- oxic.It is with unique pond type Structure and device configuration make anoxic zone in biochemistry pool and aerobic zone that can separate and dexterously solve relatively in mixed liquor and return The contradiction of stream.Because it is with the advantages that compact-sized, space is small, and cost of investment is few, easy to operate and stable effluent quality It is widely used in the medium-small flow production waste and town sewage of Industrial-Enterprises in China.
With Chinese Urbanization and construction process quickening is industrialized, industrial wastewater and sanitary sewage generate and treating capacity is continuous Increase and both at home and abroad discharge standard it is increasingly stringent, the yield of excess sludge is caused to be significantly increased.According to national environmental protection portion Statistics, for China's wastewater discharge in 2015 up to 735.3 hundred million tons, wherein town sewage discharge capacity accounts for discharge of wastewater up to 535.2 hundred million tons The 72.8% of total amount;The sludge yield generated during urban wastewater treatment is 35,000,000 tons;Expecting the year two thousand twenty sludge yield will Break through 60,000,000 tons of year.Meanwhile strengthen how to efficiently use mud organic substance and give birth to containing substantial amounts of organic carbon source in excess sludge Object denitrogenation dephosphorizing efficiency to realize sludge carbon source reuse and sludge reduction, avoids secondary pollution, this is dirty to China's low ratio of carbon to ammonium The development of aquatic organism denitrification dephosphorization technique is of great significance.
The dirty water decontamination handles technology mainly includes Physical, chemical method, bioanalysis.Overwhelming majority sewage treatment plant of China is all Using biological carbon and phosphorous removal method as the main process of sewage disposal, activated sludge process and membrane processing method can be divided into, wherein activity is dirty Mud method technique accounts for 83.95%.OCO activated sludge processes and modified technique include OGO techniques, MOCO techniques, lateral ditch type integrated film Mud method OCO techniques, central island-type integration OCD techniques, central island-type integration OCO techniques, lateral ditch type integration OCO techniques and Double side ditch formula integration OCO techniques.Traditional OCO techniques are Ji Yanyang-Que Yang-Hao Yangqu in integrally completion biological carbon and phosphorous removal With BOD remove functions.In anaerobic zone, organic matter is hydrolyzed, and the organic matter of complicated macromolecular and difficult degradation is decomposed into Simple small molecule and deliquescent organic matter absorb beneficial to bacterial cell and reduce the BOD in sewage.In the regional sewage Hydraulic detention time it is shorter, obtain by stir sewage be sufficiently mixed with sludge.In anoxic zone, NO2 -And NO3 -By anti- Nitrification is converted into innoxious N2Denitrification process is completed in discharge.Denitrifying bacterium utilizes NO2 -And NO3 -As final electron acceptor Anaerobic respiration is carried out, and the organic matter as electron donor is decomposed.In aerobic zone, some organic matters are by oxygenolysis into CO2 And H2O simultaneously generates NH3, partial organic substances are converted into sludge, NH3NO is converted by nitration reaction2 -And NO3 -, and aerobic zone Intake of the middle polyP bacteria to phosphorus so that phosphorus concentration lowers in mixed liquor, so as to fulfill dephosphorization.
At present, many difficulties are still faced in terms of sewage disposal:First, water inlet sewage carbon source lacks, and exacerbates denitrifying bacterium With competition of the polyP bacteria to carbon source, and then it is poor to result in biological carbon and phosphorous removal effect;Second, the difficult degradation of active pollution index surface Pollutant causes sludge mass transfer to be obstructed;3rd, excess sludge processing handling problems highlight, and the disposal of traditional sludge end takes Up to the 50%~60% of sewage treatment plant's running cost.Excess sludge be by sewage suspended matter, sediment, microorganism and inhaled The aggregation that attached organic matter and microbiota metabolic activity product is formed, wherein containing substantial amounts of extracellular polymeric(EPS), and Main composition is the degradabilities ingredients such as protein, polysaccharide, nucleic acid, humic acid, amino acid and lipid, if banked up everywhere not Timely processing can cause large amount of land resources occupied, and perishable fouling, organic toxicity are big, it is easy to form the secondary dirt of environment Dye, seriously affects ecological environment and human health.For above-mentioned problem, China has been done in terms of sewage disposal technology largely grinds Study carefully work, if Chinese invention patent application CN201611154027.1 proposes a kind of sewage water treatment method and system, pass through to Water inlet sewage dosing coagulant and outer carbon source improve biological carbon and phosphorous removal effect and realization water outlet to supplement carbon source needed for denitrification Water quality reaching standard.Chinese invention patent application CN200910227265.4, which proposes a kind of ultrasound-magnetic coupling breaking sludge, makes dirt The method of mud minimizing is to handle returned sludge by ultrasonic wave and magnetic field to realize the purpose of mud decrement.Chinese invention is special The crack method and the application in fermentation and hydrogen production that profit application CN201510920896.X propositions are related to a kind of excess sludge, utilize Irradiation cracks excess sludge with alkali coupling processing.Chinese invention patent application CN201510785793.7 propositions are a kind of to utilize single line The method of state oxygen breaking sludge is by putting into catalyst pyruvic acid and oxidant peroxide(Peroxy-monosulfate, percarbonic acid Salt)Crack excess sludge.Chinese invention patent application CN 201610229815.6 proposes a kind of eddy flow for cracking excess sludge Formula is jammed cavitation device, and excess sludge is cracked using Hydrodynamic cavitation effect.Chinese utility model patent application CN201521068083.4 proposes a kind of integrated multistage OCO reactors, utilizes multiple OCO retort and a precipitation clarification Biological carbon and phosphorous removal effect is improved while being filled in degradable organic pollutant, does not efficiently solve residual sludge reduction and money Source problem.All it is mainly by adding outer carbon source, breaking though above-mentioned patent all achieves remarkable result on sewage disposal technology It solves sludge internal carbon source or mud decrement and strengthening biological carbon and phosphorous removal is realized the methods of changing technique and device, but these sides Method be related to secondary pollution, the high and low effect energy consumption of fluctuation of service, cost of investment and it is complicated for operation the problems such as.Therefore, it is how more efficient It is still that current sewage disposal need be solved the problems, such as with sludge disintegration field that ground realization sewage disposal and recycling sludge, which utilize,.
Sludge yield and unstability mainly due in sludge flco rich in caused by having a large amount of organic matters;In addition denitrification Carbon source deficiency, additional carbon is not only expensive, but also blindly adds and may generate toxic side effect to entire denitrification system, Influence effluent quality.For this purpose, the present invention proposes to supplement carbon needed for denitrifying bacterium and polyP bacteria online using surplus mud internal carbon source Source.A large amount of excess sludges generate in order to prevent simultaneously, increase transportation cost, then biomass need to be prevented during biochemical treatment Increase the generation with metabolite.For this purpose, the embedded reflux bypass ultrasound-eddy flow of the present invention releases carbon system, cut by eddy flow Shearing stress, centrifugal force and ultrasonic cavitation crack excess sludge to improve denitrogenation dephosphorizing and realize mud decrement to cooperate with, and run Medicament need not be added in journey, has many advantages, such as that operating cost is low, easy to operate, easy to maintain and no coupling product, suitable for China's work Industry enterprise production waste and urban wastewater treatment firm propose mark transformation based on OCO techniques, can meet sewage treatment plant Propose mark transformation requirement, and effluent quality meets discharging standards.
The content of the invention
The present invention is based on more than technical problems, provide a kind of OCO activated sludge for being used to strengthen urban wastewater treatment and improve Device.The device embedded bypass ultrasound-eddy flow on the exteenal reflux pipe of traditional OCO sewage disposal systems releases carbon system, By strong rotational-flow shearing field, centrifugal field and and ultrasonic cavitation strengthen OCO biochemistry pools biochemical activity, improve biological denitrificaion The effect of dephosphorization and the purpose for reducing mud decrement, to realize that sludge internal carbon source recycles.
Another goal of the invention of the application is to provide a kind of OCO activated sludge for being used to strengthen urban wastewater treatment and changes Into technique.The technique is not only to take up an area few, and investment cost is low, operating condition flexibly and stable effluent quality, and with environmental protection, Economic benefit.
In order to realize more than goal of the invention, the specific technical solution of the present invention is as follows:
A kind of OCO activated sludge modified techniques for being used to strengthen urban wastewater treatment, comprise the following steps:
(1)Sewage after setting pot separates inanimate matter particle, after by separated sewage transport in a manner of anaerobic- anoxic- oxic The OCO biochemistry pools being combined to realize the removal of denitrogenation dephosphorizing and organic matter, are provided micro- using OCO biochemistry pools aerating system The oxygen that nutrients is consumed in biological decomposition water body, finally by OCO biochemistry pools, treated that sewage carries out muddy water by sedimentation basin Separation.Water purification after will be treated is discharged, and a secondary settling tank excess sludge part releases carbon system flowback extremely by the bypass sludge that flows back The input end of OCO biochemistry pools anaerobic zone A forms returned sludge, then another part is excluded as excess sludge;
(2)By step(1)At least a portion excess sludge in the secondary settling tank is sent into sludge concentration tank, to utilize gravity Sedimentation principle carries out precipitation and further concentration;
(3)Through step(2)Sludge after concentration passes through reflux pump(6)It is sent into break in strong rotational-flow shearing flow field and dissipates into small wadding Body, and remove the netted impurity of floc sludge surface difficult degradation;Eddy flow break dissipate treated excess sludge respectively from overflow port and Underflow opening flows into ultrasonic treatment unit and carries out cavitation process, to realize that microbial cell film crushes, polymerize outside release intracellular Object and intracellular organic matter are to water body;Finally by the anaerobic zone A of carbon source sludge reflux to OCO biochemistry pools.
In the present invention, in the OCO sewage disposal systems primary sedimentation tank be gravity type rotational flow settling pond, pond body planar graph For circular or rectangle, more than 0.1mm inanimate matter particulate matters are removed.
In the present invention, the ultrasonic treatment unit be supersonic wave cleaning machine, ultrasonic frequency be 20 ~ 40kHz, power Density is 0.01 ~ 0.1W/mL, and processing time is 0.01 ~ 41h, and ultrasonic sludge disintegration rate is 5%~30%.
In the present invention, the eddy flow breaks the import operation pressure of scattered device as 0.1 ~ 0.4MPa, overflow split ratio for 5% ~ 20%, eddy flow breaks scattered sludge carbon source rate as 10%~40%.
In the present invention, eddy flow breaks the returned sludge after dissipating and is sent into further cavitation process in ultrasonic treatment unit, so as to The outer polymer of sludge intracellular and intracellular organic matter are discharged to water body, and ultrasound combines sludge disintegration rate with eddy flow for 20%~50%.
In the present invention, the ultrasonic treatment unit is placed in eddy flow and breaks scattered device end, and the sludge broken through eddy flow after dissipating mixes It closes liquid and carries out ultrasonic cavitation processing again, to realize excess sludge reduction 30%~60% and resource circulation utilization.
It is a kind of to improve device for strengthening the OCO activated sludge of urban wastewater treatment, it mainly includes grid, just sink Pond, OCO biochemistry pools, secondary settling tank, sludge concentration tank, ultrasonic treatment unit and eddy flow break scattered device, wherein, the front end of the grid It is connected with water feed apparatus, rear end is connected with primary sedimentation tank, after the excess sludge delivery pipe of the secondary settling tank is connected to sludge concentration tank It reconnects eddy flow and breaks scattered device, eddy flow breaks scattered device overflow port and is connected to OCO biochemistry pools aerobic zone C, and eddy flow breaks scattered device underflow opening and leads to Carbon source mud return line is crossed to be connected with ultrasonic treatment unit, last ultrasonic treatment unit by carbon source mud return line with It is connected along the inlet line of the OCO biochemistry pools anaerobic zone A in drainage flow direction.
In the present invention, the OCO biochemistry pools are the reactors for integrating anaerobic- anoxic- oxic.
In the present invention, it can be tangential type that the eddy flow, which breaks scattered device entrance, and multitube parallel or series connection can be used in connection mode.
In the present invention, the eddy flow breaks a diameter of 20 ~ 250mm of shell of column of scattered device, and cone angle is 4 °~20 °, single eddy flow Device treating capacity is 10 ~ 100m3/h。
The positive effect of the present invention is embodied in:
(One), the present invention embedded reflux bypass sludge on the basis of traditional OCO waste water treatment process release carbon system, by residue Sludge carbon source is simultaneously back in OCO sewage treatment process systems, not only supplements anaerobic phosphorus release and anoxic denitrification institute online The carbon source needed, and improve the high activity of activated sludge in OCO sewage treatment process systems;Realize mud decrement simultaneously 30%~60% and recycling sludge recycle, there is economical and environmentally friendly benefit.
(Two), by Strong shear, strong turbulence and centrifugation in additional eddy flow energy field, realize the fast of big flocculating body Speed grinding is broken to be dissipated and discharges most of extracellular polymeric(EPS)With intracellular organic matter, and realize that flco is female under the action of the centrifugal force Body and organic matter(Such as COD)Separation and the removal of sludge flco surface hard-degraded substance.It is broken in conjunction with ultrasonic cavitation Small flco and microorganism wall are solved, to water body, this process integration belongs to machinery and cracks the outer polymer of release intracellular, has no additional Substance is put into.
(Three), compared to other Sludge Reduction Technologies, sludge reduction method of the invention avoids adding for outer carbon source, Sludge disintegration rate is improved, improves sludge settling property, optimizes effluent quality.This operational process floor space is few, structure Simply, non-secondary pollution and system stable operation is not influenced, is effectively reduced the operating cost of sewage treatment plant.
Description of the drawings
Fig. 1 is that a kind of connection relation that device is improved for strengthening the OCO activated sludge of urban wastewater treatment is illustrated Figure.
Wherein, 1-grid;2-primary sedimentation tank;3-OCO biochemistry pools(Anaerobic zone A, anoxic zone B, aerobic zone C, mixed zone D); 4-secondary settling tank;5-sludge concentration tank;6-sludge reflux pump;7-eddy flow breaks scattered device;8-ultrasonic treatment unit;9-remaining Mud discharging pipe;10th, 11-carbon source mud return line;12-microporous aeration device.
Specific embodiment
With reference to specific embodiment, the present invention is further explained.It will be appreciated that these embodiments are merely to illustrate this hair It is bright rather than limit the scope of the invention.It should also be understood that be, after reading the content taught by the present invention, this field skill Art personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims institute The scope of restriction.
% in the application unless otherwise specified, represents its wt%.
As shown in Figure 1, a kind of improve device for strengthening the OCO activated sludge of urban wastewater treatment, mainly include OCO sewage disposal systems and reflux bypass sludge release carbon system two parts.
The OCO sewage disposal systems include grid, primary sedimentation tank, the anaerobic zone A of OCO biochemistry pools, anoxic zone B, aerobic Area C and secondary settling tank, the front end of the grid are connected with water feed apparatus, and rear end is connected with primary sedimentation tank, and are sunk successively in grid, just Sewage disposal is carried out in pond, the anaerobic zone A of OCO biochemistry pools, anoxic zone B, aerobic zone C and secondary settling tank, wherein making in secondary settling tank At least a portion excess sludge sludge bypassed by reflux embedded on exteenal reflux pipeline release carbon system back to OCO biochemistry pools Anaerobic zone A.
Wherein, grid is for intercepting the suspended matter and floating material of larger particle size in sewage;Primary sedimentation tank is gravity type Rotational flow settling pond, main function are removal more than 0.1mm inanimate matter particulate matters;OCO bioids pond is collection anaerobic-anoxic-good Oxygen has the function of biological carbon and phosphorous removal, organic matter removal and mud-water separation etc. in the reactor of one.
The reflux bypass sludge releases carbon system and mainly breaks scattered device by sludge concentration tank, ultrasonic treatment unit and eddy flow Composition;Reconnection eddy flow breaks scattered device after the excess sludge delivery pipe of the secondary settling tank is connected to sludge concentration tank, and eddy flow breaks scattered Device overflow port is connected to OCO biochemistry pools aerobic zone C, and eddy flow breaks scattered device underflow opening and passes through carbon source mud return line and ultrasonic wave Processing unit connects, and last ultrasonic treatment unit is by carbon source mud return line and the OCO biochemistry pools along drainage flow direction The inlet line connection of anaerobic zone A.
The sludge concentration tank is a kind of gravity concentration tank, can be intermittent and continous way, be existed by using particle Precipitation and further concentration are carried out under gravity;Eddy flow, which is broken scattered device and broken using shearing field with centrifugation field action, dissipates into small flco, Remove floc sludge surface hard-degraded substance;Ultrasonic treatment unit handles disruption of microorganisms cell membrane by ultrasonic cavitation, releases The outer polymer of sludge intracellular and intracellular organic matter are put to water body;Reflux bypass sludge releases carbon system as OCO biochemistry pool biological denitrificaions Carbon source needed for dephosphorization supplement anti-nitration reaction, to realize that excess sludge resource recycling utilizes.
In the present invention, it can be tangential type that eddy flow, which breaks scattered device entrance, and multitube parallel can be used in connection mode or series system connects It connects.Eddy flow breaks a diameter of 20 ~ 250mm of shell of column of scattered device, and cone angle is 4 °~20 °, and single cyclone treating capacity is 10 ~ 100m3/h。
Sanitary sewage is sent into OCO biochemistry pools after preliminary pretreatment and carries out denitrogenation dephosphorizing.The technique denitrogenation dephosphorizing process is such as Under:In anaerobic zone, organic matter is hydrolyzed, by the organic matter of complicated macromolecular and difficult degradation be decomposed into simple small molecule and Deliquescent organic matter absorbs beneficial to bacterial cell and reduces the BOD in sewage;PolyP bacteria discharges phosphorus, and absorbs aliphatic acid Etc. degradable organic matter.In anoxic zone, nitrate(NO2 -And NO3 -)Innoxious N is converted by microorganism denitrification2 Denitrification process is completed in discharge.Denitrifying bacterium utilizes nitrate(NO2 -And NO3 -)Anaerobic respiration is carried out as final electron acceptor, And the organic matter as electron donor is decomposed.In aerobic zone, some organic matters are by oxygenolysis into CO2And H2O simultaneously generates NH3, Partial organic substances are converted into sludge, NH3Nitrate is converted by microorganism nitration reaction(NO2 -And NO3 -), and in aerobic zone Intake of the polyP bacteria to phosphorus so that phosphorus concentration lowers in mixed liquor, so as to fulfill dephosphorization.By in traditional OCO sewage disposals Embedded bypass ultrasound-eddy flow releases carbon system on the exteenal reflux pipe of system, utilizes rotational-flow shearing field, centrifugal field and ultrasonic cavitation Effect improves the purpose of microbial activity of activated sludge, intensified anti-nitrated reaction and realization mud decrement.
A kind of OCO activated sludge modified techniques for being used to strengthen urban wastewater treatment, operate as follows:
(1)Sewage after setting pot separates inanimate matter sand grains, after by separated sewage transport in a manner of anaerobic- anoxic- oxic The OCO biochemistry pools being combined to realize the removal of denitrogenation dephosphorizing and organic matter, are provided micro- using OCO biochemistry pools aerating system The oxygen that nutrients is consumed in biological decomposition water body, finally by OCO biochemistry pools, treated that sewage carries out muddy water by sedimentation basin Separation.Water purification after will be treated is discharged, and a secondary settling tank excess sludge part releases carbon system flowback extremely by the bypass sludge that flows back The input end of OCO biochemistry pools anaerobic zone A forms returned sludge, then another part is excluded as excess sludge;
(2)By step(1)At least a portion excess sludge in the secondary settling tank is sent into sludge concentration tank, to be sunk using gravity Drop principle carries out precipitation and further concentration;
(3)Through step(2)Sludge after concentration passes through reflux pump(6)It is sent into break in strong rotational-flow shearing flow field and dissipates into small wadding Body, and remove the netted impurity of floc sludge surface difficult degradation;Eddy flow break dissipate treated excess sludge respectively from overflow port and Underflow opening flows into ultrasonic treatment unit and carries out cavitation process, to realize that microbial cell film crushes, polymerize outside release intracellular Object and intracellular organic matter are to water body;Finally by the anaerobic zone A of carbon source sludge reflux to OCO biochemistry pools.
In the present invention, above-mentioned steps are suitable for all OCO and its modified technique containing sludge recirculation system, such as include MOCO Technique, OGO techniques etc..
In the present invention, ultrasonic treatment unit is supersonic wave cleaning machine, and ultrasonic frequency is 20 ~ 40kHz, preferably 20kHz, power density are 0.01 ~ 0.1W/mL, and processing time is 0.01 ~ 41h, and ultrasonic sludge disintegration rate is 5%~30%.
In the present invention, eddy flow breaks the import operation pressure of scattered device as 0.1 ~ 0.4MPa, preferably 0.1~0.2MPa, overflow Split ratio is 5% ~ 20%, and eddy flow breaks scattered sludge carbon source rate as 10%~40%.
In the present invention, eddy flow breaks the returned sludge after dissipating and is sent into further cavitation process in ultrasonic treatment unit, so as to The outer polymer of sludge intracellular and intracellular organic matter are discharged to water body, and ultrasound combines sludge disintegration rate with eddy flow for 20%~50%.
In the present invention, ultrasonic treatment unit is placed in eddy flow and breaks scattered device end, and the mud mixed liquid after dissipating is broken again through eddy flow Ultrasonic cavitation processing is carried out, the carbon source sludge reflux after cracking is consumed into OCO biochemistry pools, the inorganic gas release of formation Into air, organic matter deposition is avoided as excess sludge, so as to fulfill mud decrement 30%~60% and resource circulation utilization.
Embodiment 1:
Using the secondary treatment system influent quality of certain urban wastewater treatment firm as research object, sludge flco concentration is 3000mg/L Left and right, operation temperature are room temperature, and influent quality is COD=355mg/L, BOD5=170mg/L, NH3- N=38mg/L, TN=48mg/ L, TP=15mg/L, SS=80mg/L.After the bypass ultrasound-eddy flow releases carbon system, sludge flco is crushed into small excess sludge Flocculation structure, and the netted impurity of floc sludge surface difficult degradation is eliminated, COD, polysaccharide and the protein compression of sludge supernatant The organic matters such as degree add 50%~200%, greatly supplemented with carbon source concentration and realize mud decrement.Pass through Malvern laser Particle size analyzer(Beckman Coulter LS 230)Measurement result shows that eddy flow breaks the sludge particle diameter distribution dissipated with after ultrasonic cavitation It deviates to the left, average grain diameter is reduced to original 50% or so.From the point of view of effluent quality, water outlet COD≤50mg/L, BOD5≤ 25mg/L, NH4 +_N≤5mg/L, TN≤13mg/L, TP≤2mg/L, SS≤20mg/L realize mud decrement 30%~60%.
The modernization system is stable, easy to operate, non-secondary pollution, it not only increases the biochemical effect of sewage disposal system Can, effluent quality has reached the Chinese effluent standard of country, also achieves mud decrement and recycling, big so as to reduce Measure the harm of wet mud accumulation environmental pollution and human body health.
Example described above is only the preferred embodiment of this patent, but the protection domain of this patent is not limited thereto. It should be pointed out that for those skilled in the art, on the premise of this patent principle is not departed from, according to this specially The technical solution and its inventional idea of profit, can also make several improvements and modifications, these improvements and modifications also should be regarded as this specially The protection domain of profit.

Claims (10)

1. a kind of OCO activated sludge modified techniques for being used to strengthen urban wastewater treatment, it is characterised in that the technique includes following Step:
(1)Sewage after setting pot separates inanimate matter sand grains, after by separated sewage transport in a manner of anaerobic- anoxic- oxic The OCO biochemistry pools being combined realize the removal of denitrogenation dephosphorizing and organic matter, the micro- life provided using OCO biochemistry pools aerating system Object decomposes the oxygen that is consumed of nutrients in water body, and finally by OCO biochemistry pools, treated that sewage passes through sedimentation basin carries out muddy water point From;Water purification after will be treated is discharged, and a part for secondary settling tank excess sludge releases carbon system flowback extremely by the bypass sludge that flows back The input end of OCO biochemistry pools anaerobic zone A forms returned sludge, and another part is discharged as excess sludge;
(2)By step(1)A part of excess sludge in the secondary settling tank is sent into sludge concentration tank, with former using gravitational settling Reason carries out precipitation and further concentration;
(3)Through step(2)Sludge after concentration, which is pumped into break in strong rotational-flow shearing flow field by reflux, dissipates into small flco, and Remove the netted impurity of floc sludge surface difficult degradation;Eddy flow, which is broken, dissipates treated excess sludge respectively from overflow port and underflow opening It flows into ultrasonic treatment unit and carries out cavitation process, to realize that microbial cell film crushes, the outer polymer of release intracellular and born of the same parents Interior organic matter is to water body;Finally by the anaerobic zone A of carbon source sludge reflux to OCO biochemistry pools.
2. a kind of OCO activated sludge modified techniques for being used to strengthen urban wastewater treatment according to claim 1, feature It is:Primary sedimentation tank is gravity type rotational flow settling pond in the OCO sewage disposal systems, and pond body planar graph is circular or rectangle, Remove more than 0.1mm inanimate matter particulate matters.
3. a kind of OCO activated sludge modified techniques for being used to strengthen urban wastewater treatment according to claim 1, feature It is:The ultrasonic treatment unit is supersonic wave cleaning machine, and ultrasonic frequency is 20 ~ 40kHz, power density for 0.01 ~ 0.1W/mL, processing time are 0.01 ~ 41h, and ultrasonic sludge disintegration rate is 5%~30%.
4. a kind of OCO activated sludge modified techniques for being used to strengthen urban wastewater treatment according to claim 1, feature It is:The eddy flow breaks the import operation pressure of scattered device as 0.1 ~ 0.4MPa, and overflow split ratio is 5% ~ 20%, and eddy flow breaks scattered sludge Carbon source rate is 10%~40%.
5. a kind of OCO activated sludge modified techniques for being used to strengthen urban wastewater treatment according to claim 1, feature It is:The eddy flow breaks the returned sludge after dissipating and is sent into further cavitation process in ultrasonic treatment unit, so as to discharge sludge To water body, ultrasound combines sludge disintegration rate with eddy flow for 20%~50% for the outer polymer of intracellular and intracellular organic matter.
6. a kind of OCO activated sludge modified techniques for being used to strengthen urban wastewater treatment according to claim 1, feature It is:The ultrasonic treatment unit is placed in eddy flow and breaks scattered device end, and the mud mixed liquid broken through eddy flow after dissipating carries out ultrasound again Cavitation process, to realize excess sludge reduction 30%~60% and resource circulation utilization.
7. a kind of improve device for strengthening the OCO activated sludge of urban wastewater treatment, including grid(1), primary sedimentation tank(2)、OCO Biochemistry pool(3), secondary settling tank(4), sludge concentration tank(5), ultrasonic treatment unit(8)Scattered device is broken with eddy flow(7), feature exists In:The grid(1)Front end be connected with water feed apparatus, rear end and primary sedimentation tank(2)Connection, secondary settling tank(4)Excess sludge row Put pipe(9)It is connected to sludge concentration tank(5)Eddy flow is reconnected afterwards breaks scattered device(7), eddy flow breaks scattered device(7)Overflow port is connected to OCO Biochemistry pool(3)Aerobic zone C, and eddy flow breaks scattered device(7)Underflow opening passes through carbon source mud return line(10)It is filled with ultrasonication It puts(8)Connection, last ultrasonic treatment unit(8)By carbon source mud return line(11)With the OCO lifes along drainage flow direction Change pond(3)The inlet line connection of anaerobic zone A.
8. according to claim 7 improve device for strengthening the OCO activated sludge of urban wastewater treatment, feature exists In:OCO biochemistry pools(3)To integrate the reactor of anaerobic- anoxic- oxic.
9. device is improved for strengthening the OCO activated sludge of urban wastewater treatment according to claim 7, it is characterised in that: The eddy flow breaks scattered device(7)Entrance for tangential type, connection mode is using multitube parallel or is connected in series.
10. device is improved for strengthening the OCO activated sludge of urban wastewater treatment according to claim 7, it is characterised in that: The eddy flow breaks scattered device(7)The a diameter of 20 ~ 250mm of shell of column, cone angle is 4 °~20 °, single cyclone treating capacity for 10 ~ 100m3/h。
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