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 PDFInfo
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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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
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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| CN114426372A (en) * | 2020-10-10 | 2022-05-03 | 中国石油化工股份有限公司 | Method and device for improving activity of AO process sludge |
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