CN106517516A - Industrial wastewater upgrading and reconstruction biological treatment equipment and treatment technology - Google Patents

Industrial wastewater upgrading and reconstruction biological treatment equipment and treatment technology Download PDF

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Publication number
CN106517516A
CN106517516A CN201610927425.6A CN201610927425A CN106517516A CN 106517516 A CN106517516 A CN 106517516A CN 201610927425 A CN201610927425 A CN 201610927425A CN 106517516 A CN106517516 A CN 106517516A
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pond
stage
denitrification
biological
nitration
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CN106517516B (en
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杨岳平
朱强
周俊利
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • 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
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • 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

Abstract

Industrial wastewater upgrading and reconstruction biological treatment equipment and a treatment technology belong to the field of wastewater treatment technology. The treatment equipment comprises a first-stage A/O biological treatment system and a second-stage A/O biological treatment system. The treatment technology comprises an A1-stage anaerobic hydrolysis stage, an O1-stage micro-aerobic simultaneous nitrification and denitrification stage, an A2-stage hydrolysis and denitrification stage and an O2-stage aerobic biological treatment stage. After enhancing the two-stage A/O system through a biological fluid bed technology, the equipment is suitable for treatment of industrial wastewater with low nutrient loading, poor biodegradability, high salinity and large processing difficulty, and the system has strong capacity of resisting impact load and operates stably and reliably.

Description

A kind of mark that carries of industrial wastewater transforms biological treatment device and handling process
Technical field
The invention belongs to technical field of sewage, and in particular to the mark transformation biological treatment that carries for a kind of industrial wastewater is filled Put and handling process.
Background technology
Industrial constantly to develop, the type and quantity of waste water also rapidly increase, water pollution seriously threaten the health of the mankind and Safety.Industrial wastewater complicated component, containing various different polluters, and the polluter in all types of industries waste water and concentration There is larger difference, it is more difficult to process.
Ambient pressure increasingly serious, every profession and trade is suitable for discharge standard and improves constantly now, and water re-using rate requires further tight Lattice.Such as《National environmental protection " 12 " is planned》Explicitly point out and thoroughly apply the Scientific Outlook on Development, make great efforts to improve ecological text Open fire is put down, and in-depth major pollutants total amount is reduced discharging.The major pollutants that planning is also fixed to China in " 12 " period simultaneously are total , compared with 2010, COD and sulfur dioxide (SO2) emissions total amount decline 8%, ammonia for the emission reduction targets of amount discharge and task Nitrogen and discharged nitrous oxides total amount decline 10%.
Waste water through each business processes, recycle and Treated sewage reusing after, the enrichment such as difficult degradation COD, salinity in discharge water Accumulation, although wherein COD is not high, compared with difficult for biological degradation, and high conductivity environmental effect growth of microorganism and activity.Using thing Physicochemical method processing cost is larger, and the bioremediation of routine cannot the such waste water of effective process.
Biological flow bed (biological fluidized beds, BFBs) be at the beginning of the 70's of 20th century, by The U.S. is first begin to what is developed and apply.The technique is on the basis of biomembrance process, using fluidised concept Operated, be a kind of enhanced biological process, improve the high-performance bio handling process of microbial degradation Organic substance ability, overcome Shortcoming is blocked present in static bed biomembrane method easily.
U.S. Jeris Johns et al. successfully developed Anaerobe flowing bed technique and had applied for patent in 1973, The technology is used for removing BOD5And NH3The nitration treatment of-N, BOD clearances are up to 93% within the time of staying of 16min.The U.S. Ecolotrol companies obtain biological flow bed process waste water first in the biological flow bed techniques of HY-FIO of exploitation in 1975 Patent, and it is used for two tertiary treatment of waste water.Research of the Japan in terms of the mid-1970s have started fluid bed, which is conceived to The wastewater treatment of middle-size and small-size factory, representative are Mitsubishi and Su Tian companies.Anoxkaldnes was 80 years 20th century In generation, has researched and developed the patented technology of moving bed biological membrane process (M BBR/Moving Bed Bio-film Reactor), 1989, completed for use using first municipal sewage plant of the technique, hereafter the technique and the combination with other techniques Technique is successfully applied in 47 more than 500 national cities and industrial effluent treatment plant.
Nitrogen is an important indicator in waste water, Denitrogenation be always Chinese scholars concern subject matter it One, the biological denitrificaion of ammonia nitrogen mainly includes that two processes of nitrification and denitrification need to complete under aerobic and anaerobic condition.Pass The biological denitrification process of system mainly has oxidation ditch (Oxidation Ditch) technique, A2/O(Anaerobic Anoxic Oxic) Technique, SBR (Sequencing Batch Reactor) technique.But traditional technique generally existing treatment effeciency is low, capital cost The features such as with high, running complexity.Dutch Delft polytechnical universities were you can well imagine out and are successfully developed in nineteen ninety and 1997 fraction of the year Anammox (Anammox) technique and short-cut nitrification-denitrification (SHARON) technique.Third in 1999 etc. proposes complete Autotrophic type nitrogen removes (CANON) technique, and the denitrification process efficiency that these newly emerge in large numbers is higher, but the control of practice condition is more tight Lattice, wastewater environment require higher.
Therefore, it is necessary to the difficult point of degrade in being directed to existing wastewater treatment COD and denitrogenation, proposes a kind of carrying for industrial wastewater Mark transformation biological treatment device and handling process.
The content of the invention
It is an object of the invention to overcome defect mentioned above and deficiency, and the mark that carries for providing a kind of industrial wastewater is transformed Biological treatment device.
Another object of the present invention is to the mark that carries for providing a kind of industrial wastewater transforms biological treatment
The present invention realizes that the technical scheme that its purpose is adopted is as follows.
A kind of mark that carries of industrial wastewater transforms biological treatment device, including one section of A/O biological treatment system and two-stage nitration A/O lifes Thing processing system;One section of A/O biological treatment system is by one section of Anaerobe thermopnore hydrolytic tank and one section of micro- oxygen synchronization nitre Change denitrification pond composition;The two-stage nitration A/O biological treatment systems are by the biological flow bed denitrification pond of two-stage nitration anoxia, the aerobic life of two-stage nitration Thing thermopnore pond and mud-water separation pond composition;Described one section of micro- oxygen synchronous nitration and denitrification pond one end connects one section of Anaerobe Thermopnore hydrolytic tank, the biological flow bed denitrification pond of other end connection two-stage nitration anoxia;The two-stage nitration aerobe thermopnore pond one The biological flow bed denitrification pond of end connection two-stage nitration anoxia, other end connection mud-water separation pond.
Further, one section of Anaerobe thermopnore hydrolytic tank is connected with regulating reservoir;The mud-water separation pond is provided with Sludge reflux road;The outlet on sludge reflux road connects one section of Anaerobe thermopnore hydrolytic tank, one section of micro- oxygen simultaneous nitrification and denitrification nitre Change pond, the biological flow bed denitrification pond of two-stage nitration anoxia and two-stage nitration aerobe thermopnore pond;The two-stage nitration anoxia is biological flow bed Nitrification liquid backflow road is provided between denitrification pond and two-stage nitration aerobe thermopnore pond.
Further, one section of Anaerobe thermopnore hydrolytic tank, the biological flow bed denitrification pond of two-stage nitration anoxia and two-stage nitration It is provided with aerobe thermopnore pond biological flow bed;It is biological flow bed to be provided with biologic packing material.
Further, the biologic packing material proportion in biological flow bed is close with water, can be flowed under mild agitation in water, Cube or lamellar is shaped as, size 3cm × 3cm × 3cm ~ 5cm × 5cm × 5cm, the material of biologic packing material are extra large for polyurethane Silk floss, biologic packing material volume filling rate are 5% ~ 40%.
A kind of mark that carries of industrial wastewater transforms biological treatment, including A1 section anaerobic hydrolysis stages, the micro- oxygen synchronization of O1 sections Nitration denitrification stage, the hydrolysis of A2 sections and denitrification stage and O2 section Aerobic biological process stages;Its step is as follows:
The step one .A1 section anaerobic hydrolysis stages:One section of Anaerobe thermopnore is entered after the pretreatment in the adjusted pond of industrial wastewater Hydrolytic tank, and mix with the returned sludge on sludge reflux road, using Anaerobe flowing bed process, the difficult degradation in industrial wastewater Organic substance is broken down into degradable small organic molecule;
Step 2 .O1 section micro- oxygen synchronous nitration and denitrification stage:The water outlet of one section of Anaerobe thermopnore hydrolytic tank flows into one section Micro- oxygen synchronous nitration and denitrification pond, and mix with sludge reflux road returned sludge, flowed using activated sludge process or built-in biological Bed biologic packing material technique, remove industrial wastewater in part COD while synchronize nitration denitrification effect remove ammonia nitrogen and Total nitrogen, reduces the NH in industrial wastewater4 +- N, TN contents;
Step 3 .A2 section is hydrolyzed and the denitrification stage:The water outlet in one section of micro- oxygen synchronous nitration and denitrification pond flows into the life of two-stage nitration anoxia Thing thermopnore denitrification pond, using Anaerobe flowing bed process, the nitrite nitrogen in industrial wastewater is reduced into N with nitrate nitrogen2Enter Row denitrification denitrogenation, while remaining difficult degradation COD is further hydrolyzed after one section of micro- oxygen synchronous nitration and denitrification pond is processed;
The step 4 .O2 section Aerobic biological process stage:It is aerobic that the water outlet in the biological flow bed denitrification pond of two-stage nitration anoxia enters two-stage nitration Biological flow bed pond, the biologic packing material in two-stage nitration aerobe thermopnore pond form anaerobism-and oxygen-aerobic microenvironment from the inside to the outside, The efficiency of COD degradation and denitrogenation, Biomass in raising system is improved, and reduces the yield of excess sludge;Fully aeration, removes Remaining COD, ammonia nitrogen and total nitrogen in industrial wastewater;
Step 5. the water outlet in two-stage nitration aerobe thermopnore pond standard emission of clear or advanced treating behind mud-water separation pond are returned With each pond of sludge reflux, total reflux ratio are 50 ~ 200%.
Further, step one, hydraulic detention time are 8 ~ 12h;Step 2, hydraulic detention time are 4 ~ 6h, dissolved oxygen DO Control is between 0.5 ~ 1.5mg/L;In step 3, hydraulic detention time is 5 ~ 8h, and dissolved oxygen DO is in below 0.5mg/L;Step In four, hydraulic detention time is 8 ~ 20h, and dissolved oxygen DO controls are between 2 ~ 4mg/L.
Further, one section of Anaerobe thermopnore hydrolytic tank adopts up flow type hydraulic agitation device;The mud-water separation pond For the one kind in sedimentation tank, flotation tank, MBR film separation systems, biofilter.
Further, hydrolysis bacterium and/or this kind of function of denitrifying bacterium is added in one section of Anaerobe thermopnore hydrolytic tank Bacterium;At least one of ammonia oxidizing bacteria, denitrifying bacteria, drop COD bacterium work(has been added in one section of micro- oxygen synchronous nitration and denitrification pond Can bacterium;Hydrolysis bacterium and/or this kind of function bacterium of denitrifying bacteria has been added in the biological flow bed denitrification pond of two-stage nitration anoxia;Described two Ammonia oxidizing bacteria and/or this kind of function bacteriums of drop COD has been added in section aerobe thermopnore pond.
Further, the pretreatment condition of regulating reservoir is:PH 6 ~ 9,10 ~ 50 DEG C of temperature;
The technical program employ optimization two sections of A/O Process ba- sis on integrated bio flowing bed process a kind of waste water at Science and engineering skill, the technique combine the stability and the high efficiency of new denitrification process of traditional denitrification process, while and using biological The high-biomass of thermopnore, poisoning resistant and load impact ability be strong, suitable for the advantage of low nutrition substance environment, to underload, can Biochemical is poor, salinity is high, the industrial wastewater that intractability is big has preferable treatment effect.In addition in order to improve Anaerobe stream The mobility of dynamic bed, we have proposed a kind of diversified agitation system design, and stirring can be in the following ways:1 using water inlet or Returned sludge pulsed water is stirred;2 internal reflux pulses are stirred;The auxiliary waterpower pulse stirring of 3 fresh airs.
The present invention by two sections of A/O+ biological flow bed integrated treatment process coupling integration, with advantages below:
1. after each systems of two sections of A/O of biological flow bed process strengthening, it is adaptable to process low nutrition load, biodegradability it is poor, Salinity is high, the industrial wastewater that intractability is big, and system anti impulsion load ability is strong, stable and reliable operation;
2. one section of micro- oxygen synchronous nitration and denitrification pond, aerobe thermopnore pond control dissolved oxygen it is relatively low, can effectively save exposure Gas energy consumption and cost of investment;
3. the biological flow bed denitrification pond of two-stage nitration anoxia is set behind one section of micro- oxygen synchronous nitration and denitrification pond, eliminates one section Nitrification liquid backflow in A/O denitrification process, has saved operating cost;
4. sludge output is less, and system can voluntarily digest partial sludge, reduces the cost of Treatment of Sludge;
5. practical application is flexible and changeable, can select various cell body structures, alr mode, and adjust biological flow bed biology The filling rate of filler, it might even be possible to be not filled with biologic packing material.Promote in original technique and be easier conveniently.
Description of the drawings
Fig. 1 is the apparatus structure schematic diagram of the present invention;
Fig. 2 is the process chart of the present invention;
Fig. 3 is a kind of arrangement schematic diagram of up flow type hydraulic agitation device;
Fig. 4 is another kind of arrangement schematic diagram of up flow type hydraulic agitation device;
Fig. 5 is the process chart of embodiment 1;
Fig. 6 is the process chart of embodiment 2;
Fig. 7 is the process chart of embodiment 3;
Fig. 8 is two sections of A/O intensive treatment system treatment effect figures of embodiment 3;
Fig. 9 is the process chart of embodiment 4;
Figure 10 is two sections of A/O treatment effect figures of embodiment 4;
In figure:1, one section of regulating reservoir 2, one section of Anaerobe thermopnore hydrolytic tank micro- oxygen synchronous nitration and denitrification pond 3, two-stage nitration anoxia Biological flow bed denitrification pond 4, two-stage nitration aerobe thermopnore pond 5, mud-water separation pond 6, the backflow of sludge reflux road 7, nitrification liquid Road 8.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in further detail.
The present invention is a kind of wastewater processing technology of the integrated bio flowing bed process on two sections of A/O Process ba- sis of optimization Scheme.
One section of A/O biological treatment system is by one section of Anaerobe thermopnore hydrolytic tank 2 and one section of micro- oxygen simultaneous nitrification and denitrification nitre Change pond 3 to constitute.
Two-stage nitration A/O biological treatment systems are by the biological flow bed denitrification pond 4 of two-stage nitration anoxia, two-stage nitration aerobe thermopnore pond 5 and mud-water separation pond 6 constitute.
One section of Anaerobe thermopnore hydrolytic tank 2 is connected with regulating reservoir 1.One section of micro- oxygen synchronous nitration and denitrification 3 one end of pond connects one section of Anaerobe thermopnore hydrolytic tank 2, the biological flow bed denitrification pond of other end connection two-stage nitration anoxia 4;Institute State the biological flow bed denitrification pond 4 of 5 one end of two-stage nitration aerobe thermopnore pond connection two-stage nitration anoxia, other end connection mud-water separation Pond 6.The mud-water separation pond 6 is provided with sludge reflux road 7;The outlet on sludge reflux road 7 connects one section of Anaerobe thermopnore 2, one section of micro- oxygen synchronous nitration and denitrification pond 3 of hydrolytic tank, the biological flow bed denitrification pond 4 of two-stage nitration anoxia and two-stage nitration aerobe stream Dynamic bed pond 5;Nitrification is provided between the biological flow bed denitrification pond 4 of the two-stage nitration anoxia and two-stage nitration aerobe thermopnore pond 5 Liquid backflow road 8.
The biological flow bed denitrification pond 4 of one section of Anaerobe thermopnore hydrolytic tank 2, two-stage nitration anoxia and two-stage nitration aerobe stream It is provided with dynamic bed pond 5 biological flow bed;It is biological flow bed to be provided with biologic packing material;Biologic packing material ratio in biological flow bed Weight is close with water, can flow, be shaped as cube or lamellar, size 3cm × 3cm × 3cm ~ 5cm under mild agitation in water × 5cm × 5cm, material are polyurethane sponge, and biologic packing material volume filling rate is 5% ~ 40%.
The function bacteriums such as hydrolysis bacterium, denitrifying bacterium are added in one section of Anaerobe thermopnore hydrolytic tank 2;One section of micro- oxygen is same The function bacteriums such as ammonia oxidizing bacteria, denitrifying bacteria, drop COD bacterium have been added in step nitration denitrification pond 3;The biological flowing of two-stage nitration anoxia Hydrolysis bacterium, denitrifying bacteria etc. have been added in bed denitrification pond 4;Ammonia oxygen has been added in the two-stage nitration aerobe thermopnore pond 5 Change antibacterial, drop COD function bacteriums.
This method adopts two sections of A/O techniques of optimization, including A1 section anaerobic hydrolysis stages, the micro- oxygen synchronous nitration and denitrification of O1 sections Stage, the hydrolysis of A2 sections and denitrification stage, O2 section Aerobic biological process stages;Its step is as follows:
The step one .A1 section anaerobic hydrolysis stages:One section of Anaerobe thermopnore is entered after the pretreatment in the adjusted pond of industrial wastewater 1 Hydrolytic tank 2, and mixing with the returned sludge on sludge reflux road 7, hydraulic detention time is 8 ~ 12h, the difficult degradation in industrial wastewater Organic substance is broken down into degradable small organic molecule;PH 6 ~ 9 after industrial wastewater pretreatment, 10 ~ 50 DEG C of temperature.
Industrial wastewater, the returned sludge and biologic packing material mix homogeneously under agitating device effect;A1 sections adopt Anaerobe Flowing bed process, the difficult drop in the presence of the hydrolysising microorganism in one section of Anaerobe thermopnore hydrolytic tank 2, in industrial wastewater Solution Organic substance is broken down into degradable small organic molecule, effectively improves the biodegradability of waste water, improves hydrolyzing sludge concentration, Enhanced hydrolysis treatment effect;
The agitating device of one section of Anaerobe thermopnore hydrolytic tank 2 adopts up flow type hydraulic agitation device, makes industrial wastewater and one In section Anaerobe thermopnore hydrolytic tank 2, biologic packing material and hydrolyzing sludge are fully contacted mixing, improve hydrolysis efficiency.
The up flow type hydraulic mixing is that the entrances such as water inlet, backflow are arranged on bottom of pond, water inlet, nitrification liquid backflow and dirt Mud backflow is entered from bottom of pond portion, using pulsed water distribution, is provided hydraulic blow upwards in water distribution, is made to be suspended in waste water Biologic packing material floats, and pond top arranges baffle plate, after filler is intercepted by upper strata baffle plate during floating, can produce certain squeezing Compressive strain, stop water distribution after, filler deadweight and recoverable force interaction force under the influence of, most of filler can under It is heavy.Again during water distribution, filler floats again, makes filler fluctuate in pond, and is fully contacted with the pollutant in waste water, such as Fig. 3.
Water inlet can also be arranged on bottom of pond portion by the up flow type hydraulic mixing, and interior circulation, nitrification liquid flow back and sludge Backflow is entered from pond side lower, and pond top arranges grid baffle plate, and baffle plate is arranged at dead angle, and during water distribution, mixed liquor and biologic packing material exist Do spiral-flow type motion under hydraulic action power in the counterclockwise direction, the pollutant in sewage is fully connect with the biomembrane on filler Touch, improve mass transfer effect, such as Fig. 4.
The up flow type hydraulic agitation device is in one section of micro- oxygen synchronous nitration and denitrification pond 3 and two-stage nitration aerobe thermopnore Pond 5 can also aid in waterpower pulse stirring by aeration.
Step 2 .O1 section micro- oxygen synchronous nitration and denitrification stage:The water outlet of one section of Anaerobe thermopnore hydrolytic tank 2 is flowed into One section of micro- oxygen synchronous nitration and denitrification pond 3, and mix with 7 returned sludge of sludge reflux road, hydraulic detention time is 4 ~ 6h, is dissolved Oxygen DO is controlled between 0.5 ~ 1.5mg/L, synchronizes nitration denitrification effect while removing the part COD in industrial wastewater Total nitrogen is removed, the NH in industrial wastewater is reduced4 +- N, TN contents;
One section of micro- oxygen synchronous nitration and denitrification pond 3 adopts activated sludge process or built-in biological thermopnore biologic packing material technique.
Step 3 .A2 section is hydrolyzed and the denitrification stage:The water outlet in one section of micro- oxygen synchronous nitration and denitrification pond 3 flows into two-stage nitration and lacks The biological flow bed denitrification pond 4 of oxygen, hydraulic detention time are 5 ~ 8h, and dissolved oxygen DO is in below 0.5mg/L, the stable anaerobism of formation Microenvironment, the nitrite nitrogen in industrial wastewater are reduced into N with nitrate nitrogen2Denitrification denitrogenation is carried out, while one section of micro- oxygen synchronous nitration After denitrification pond 3 is processed, remaining difficult degradation COD is further hydrolyzed;
A2 sections alr mode is identical with A1 sections;A2 sections are carried for anaerobe using Anaerobe flowing bed process, biologic packing material For stable growing environment, one-step hydrolysis that O1 water outlet denitrification denitrogenations are gone forward side by side acidifying;The anaerobism in biologic packing material and sludge In the presence of microorganism, nitrite nitrogen is reduced into N with nitrate nitrogen2Denitrification denitrogenation is carried out, while one section of micro- oxygen simultaneous nitrification and denitrification nitre Change remaining difficult degradation COD after pond 3 is processed further to be hydrolyzed, improve the biodegradability of industrial wastewater;
The step 4 .O2 section Aerobic biological process stage:It is aerobic that the water outlet in the biological flow bed denitrification pond of two-stage nitration anoxia 4 enters two-stage nitration Biological flow bed pond 5, the biologic packing material in two-stage nitration aerobe thermopnore pond 5 form anaerobism-and oxygen-aerobic micro-loop from the inside to the outside Border, improves the efficiency of COD degradation and denitrogenation, Biomass in raising system, and reduces the yield of excess sludge;During hydraulic retention Between be 8 ~ 20h, abundant aeration, remove industrial wastewater in remaining COD, ammonia nitrogen and total nitrogen;Control system dissolved oxygen, it is most of COD and remaining nitrogen here are able to effective process;
Step 5. the water outlet in two-stage nitration aerobe thermopnore pond 5 standard emission of clear or advanced treating behind mud-water separation pond 6 Reuse, each pond of sludge reflux, total reflux ratio are 50 ~ 200%.
The mud-water separation pond 6 is sedimentation tank, flotation tank, MBR film separation systems, the one kind in biofilter.
It is of the invention compared with traditional A/O techniques, its validity feature finds expression in:
1st, one section of Anaerobe thermopnore hydrolytic tank, 2, one section of micro- oxygen synchronous nitration and denitrification pond 3, the life of two-stage nitration anoxia in the present invention Thing thermopnore denitrification pond 4, two-stage nitration aerobe thermopnore pond 5 put into different with efficient function bacterium and suitable function The biologic packing material of bacteria growing.
2nd, in the present invention, one section of Anaerobe thermopnore hydrolytic tank, 2, one section of micro- oxygen synchronous nitration and denitrification pond 3, two-stage nitration lacks The biological flow bed denitrification pond 4 of oxygen, two-stage nitration aerobe thermopnore pond 5 adjust DO, HRT and reflux ratio allow by parameters optimization The function bacterium for adding preferably is grown on biomembrane, reduces the loss of function bacterium, maintains the microorganism recoverable amount in reaction tank, Impact resistance is increased, is to maintain one of stable key factor for the treatment of effeciency of whole technique.
3rd, biologic packing material of the present invention forms portion's anaerobism, anoxia, micro- oxygen and aerobic life from inside to outside by biofilm State environment, forms internal based on anaerobism/facultative microbe, the outside microorganism species based on simultaneous oxygen/aerobic microbiological, shape Into synergism, sewage treating efficiency is effectively improved.
4th, the present invention supplements a little activated sludge based on feeding function bacterium, suitably, and sludge production is few, effectively reduces dirt The discharge of mud.
5th, the present invention realizes synchronous nitration and denitrification on denitrification process, reduces aeration, saves energy consumption, compares feelings in low C/N There is under condition higher nitric efficiency.
6th, by water distribution and aeration, the present invention realizes that up flow type pulse is stirred, reduces mechanical agitation to biologic packing material and biology The damage of group, reduces energy consumption, while improving muddy water mixing, improves biochemical efficiency.
Embodiment 1:
Wet drawing process in certain large-scale steel cord enterprise plating drawing process, mainly has two kinds of lubricant waste water, respectively FP profits Lubrication prescription waste water and ADMU lubricant waste water.Two kinds of waste water water yields are less, but complicated component, and pollutant levels are high, and intractability is big. Waste water is processed into two-stage A/O system after pretreatment and senior anaerobic treatment.
Two sections of A/O technological processes are as shown in Figure 5.
1 two sections of A/O Inlet and outlet water water quality of table
Water outlet workshop section pH COD(mg/L)
Senior anaerobic reactor water outlet 6.96±0.47 2253±485
One section of A/O biological treatment system water outlet 7.69±0.25 501±62
Two grades of A/O biological treatment system water outlets 7.56±0.99 419±67
As shown above, lubricant waste water is in the COD after the process of pretreatment, senior anaerobic reactor and two-stage A/O system Less than 500mg/L.The COD removal efficiency of two sections of A/O reaches 81.4%.
Embodiment 2:
Certain printing and dyeing industry garden waste water quality is as shown in table 2:
2 influent quality of table
Two sections of A/O techniques of design are as shown in Figure 6.
One section of 2 time of staying of Anaerobe thermopnore hydrolytic tank of two sections of A/O techniques is 12.3h;Medium sediment pool surface loading is 0.83m/h;One section of micro- 3 time of staying of oxygen synchronous nitration and denitrification pond is that 6.1h, dissolved oxygen are controlled in 0.5 ~ 1.5mg/L;Two-stage nitration Anoxia biological flow bed 4 time of staying of denitrification pond is 7.2h, dissolved oxygen less than 0.5mg/L;Two-stage nitration aerobe thermopnore pond 5 The time of staying is 16.2h, and dissolved oxygen is between 3 ~ 5mg/L;The surface loading of second pond is 0.45m/h.Mud-water separation pond 6 is relative Return sludge ratio is answered to be between 50% ~ 100%.
The each index of water outlet is as shown in the table after two months for operation:
3. each cell body of table passes in and out water quality monitoring result
The present invention COD, BOD to waste water5、NH3The index such as-N, TN, TP, SS has preferable removal effect, corresponding Clearance is respectively 67.0%, 92.1%, 96.2%, 86.1%, 76.2%, 73.5%.Wherein BOD5、NH3- N, TN, TP four indices are all It is less than《Urban wastewater treatment firm pollutant emission mark》, reach research design requirement.
Embodiment 3:
After the categorized pretreatment of different waste water produced by certain drugmaker industrial park, high concentration technique waste water is concentrated and enters UASB High efficiency anaerobic reactor anaerobic biodegradation, water outlet enter high load capacity Aerobic Pond, composite technology waste water and other low concentration wastewaters It is directly entered high load capacity Aerobic Pond.Jing after high load capacity Aerobic Pond Aerobic biological process, water outlet enters two sections of A/O intensive treatment systems. High load capacity oxidation pond effluent quality is as shown in the table:
4 high load capacity oxidation pond effluent quality of table
After high load capacity oxidation pond, technique is as shown in Figure 7.
Two sections of A/O intensive treatment system treatment effects are as shown in Figure 8.
From figure 8, it is seen that the waste water COD into two sections of A/O intensive treatment systems is 4000mg/L or so, electrical conductivity is 17000 μ s/cm or so, salinity are 1% or so, and water-quality ratio is more severe, is unfavorable for the growth and activity of conventional microbiological.Through two After section A/O intensive treatment systems, the COD of waste water is substantially reduced, in most cases, mono- section of A/ of COD > of two sections of A/O water inlets The COD of the COD > two-stage nitration A/O water outlets of O water outlets, total COD removal efficiency reach 37%.
Embodiment 4:
Certain IC manufacturing service company produces industrial wastewater and sanitary sewage totally 360 m in process of production3/ d, wherein work Industry waste water less than total Water 20%.Industrial wastewater enters regulating reservoir and Jing after physics, the method pretreatment of chemistry after grid Sanitary sewage mixed processing.The water quality of industrial wastewater after pretreatment and sanitary sewage is as shown in the table:
The postindustrial waste water of 5 pretreatment of table and sanitary sewage water quality
Project pH COD/(mg/L) NH3-N/(mg/L)
The postindustrial waste water of pretreatment 6.6~11.3 43.5~120 0.4~10.6
Sanitary sewage 6.38~7.6 121.5~318 13.6~33.1
After mixing, comprehensive effluent disposal technology is as shown in Figure 9.
Two sections of A/O treatment effects are as shown in Figure 10:
After two sections of A/O intensive treatment systems, the COD of water outlet reaches 25mg/L or so, stably less than 50mg/L, water outlet ammonia nitrogen Substantially below 1mg/L, far below the discharge standard of 15mg/L, once in a while water quality impact water outlet ammonia nitrogen rising, but still is less than discharge Standard.

Claims (9)

1. a kind of industrial wastewater carries mark transformation biological treatment device, it is characterised in that including one section of A/O biological treatment system and Two-stage nitration A/O biological treatment systems;One section of A/O biological treatment system is by one section of Anaerobe thermopnore hydrolytic tank(2)With one The micro- oxygen synchronous nitration and denitrification pond of section(3)Composition;The two-stage nitration A/O biological treatment systems are by the biological flow bed anti-nitre of two-stage nitration anoxia Change pond(4), two-stage nitration aerobe thermopnore pond(5)And mud-water separation pond(6)Composition;One section of micro- oxygen simultaneous nitrification and denitrification nitre Change pond(3)One end connects one section of Anaerobe thermopnore hydrolytic tank(2), the biological flow bed denitrification of other end connection two-stage nitration anoxia Pond(4);The two-stage nitration aerobe thermopnore pond(5)The biological flow bed denitrification pond of one end connection two-stage nitration anoxia(4), the other end Connection mud-water separation pond(6).
2. a kind of mark that carries of industrial wastewater as claimed in claim 1 transforms biological treatment device, it is characterised in that described one section Anaerobe thermopnore hydrolytic tank(2)It is connected with regulating reservoir(1);The mud-water separation pond(6)It is provided with sludge reflux road(7); Sludge reflux road(7)Outlet connect one section of Anaerobe thermopnore hydrolytic tank(2), one section of micro- oxygen synchronous nitration and denitrification pond (3), the biological flow bed denitrification pond of two-stage nitration anoxia(4)With two-stage nitration aerobe thermopnore pond(5);The biological stream of the two-stage nitration anoxia Dynamic bed denitrification pond(4)With two-stage nitration aerobe thermopnore pond(5)Between be provided with nitrification liquid backflow road(8).
3. a kind of mark that carries of industrial wastewater as claimed in claim 2 transforms biological treatment device, it is characterised in that described one section Anaerobe thermopnore hydrolytic tank(2), the biological flow bed denitrification pond of two-stage nitration anoxia(4)With two-stage nitration aerobe thermopnore pond (5)In be provided with it is biological flow bed;It is biological flow bed to be provided with biologic packing material.
4. a kind of mark that carries of industrial wastewater as claimed in claim 3 transforms biological treatment device, it is characterised in that biological flowing Biologic packing material proportion in bed is close with water, can flow, be shaped as cube or lamellar, size under mild agitation in water 3cm × 3cm × 3cm ~ 5cm × 5cm × 5cm, the material of biologic packing material is polyurethane sponge, and biologic packing material volume filling rate is 5% ~40%。
5. a kind of mark that carries of the industrial wastewater of processing meanss described in employing claim 4 transforms biological treatment, including A1 sections Anaerobic hydrolysis stage, O1 sections micro- oxygen synchronous nitration and denitrification stage, the hydrolysis of A2 sections and denitrification stage and O2 section aerobes Processing stage;Its step is as follows:
The step one .A1 section anaerobic hydrolysis stages:The adjusted pond of industrial wastewater(1)Pretreatment after into the flowing of one section of Anaerobe Bed hydrolytic tank(2), and with sludge reflux road(7)Returned sludge mixing, using Anaerobe flow bed process, in industrial wastewater Hardly degraded organic substance be broken down into degradable small organic molecule;
Step 2 .O1 section micro- oxygen synchronous nitration and denitrification stage:One section of Anaerobe thermopnore hydrolytic tank(2)Water outlet flow into one The micro- oxygen synchronous nitration and denitrification pond of section(3), and with sludge reflux road(7)Returned sludge mixes, using activated sludge process or built-in Biological flow bed biologic packing material technique, synchronizes nitration denitrification while removing the part COD in industrial wastewater and spends Except ammonia nitrogen and total nitrogen, the NH in industrial wastewater is reduced4 +- N, TN contents;
Step 3 .A2 section is hydrolyzed and the denitrification stage:One section of micro- oxygen synchronous nitration and denitrification pond(3)Water outlet flow into two-stage nitration anoxia Biological flow bed denitrification pond(4), using Anaerobe flowing bed process, the nitrite nitrogen in industrial wastewater is reduced into nitrate nitrogen N2Denitrification denitrogenation is carried out, while one section of micro- oxygen synchronous nitration and denitrification pond(3)After process, remaining difficult degradation COD is further Hydrolysis;
The step 4 .O2 section Aerobic biological process stage:The biological flow bed denitrification pond of two-stage nitration anoxia(4)Water outlet enter two-stage nitration it is good The biological flow bed pond of oxygen(5), two-stage nitration aerobe thermopnore pond(5)Biologic packing material form anaerobism-and oxygen-aerobic from the inside to the outside Microenvironment, improves the efficiency of COD degradation and denitrogenation, Biomass in raising system, and reduces the yield of excess sludge;Fully expose Gas, removes remaining COD, ammonia nitrogen and total nitrogen in industrial wastewater;
Step 5. two-stage nitration aerobe thermopnore pond(5)Water outlet through mud-water separation pond(6)Standard emission of clear or depth afterwards Treatment for reuse, each pond of sludge reflux, total reflux ratio are 50 ~ 200%.
6. a kind of mark that carries of industrial wastewater as claimed in claim 5 transforms biological treatment, it is characterised in that step one, Hydraulic detention time is 8 ~ 12h;Step 2, hydraulic detention time are 4 ~ 6h, and dissolved oxygen DO controls are between 0.5 ~ 1.5mg/L; In step 3, hydraulic detention time is 5 ~ 8h, and dissolved oxygen DO is in below 0.5mg/L;In step 4, hydraulic detention time be 8 ~ 20h, dissolved oxygen DO are controlled between 2 ~ 4mg/L.
7. a kind of mark that carries of industrial wastewater as claimed in claim 5 transforms biological treatment, it is characterised in that one section of anaerobism Biological flow bed hydrolytic tank(2)Using up flow type hydraulic agitation device;The mud-water separation pond(6)For sedimentation tank, flotation tank, One kind in MBR film separation systems, biofilter.
8. a kind of mark that carries of industrial wastewater as claimed in claim 5 transforms biological treatment, it is characterised in that described one section Anaerobe thermopnore hydrolytic tank(2)In add hydrolysis bacterium and/or this kind of function bacterium of denitrifying bacterium;One section of micro- oxygen simultaneous nitrification and denitrification Nitrification tank(3)In added ammonia oxidizing bacteria, denitrifying bacteria, drop at least one of COD bacterium function bacterium;The biological stream of two-stage nitration anoxia Dynamic bed denitrification pond(4)In added hydrolysis bacterium and/or this kind of function bacterium of denitrifying bacteria;The two-stage nitration aerobe thermopnore Pond(5)In added ammonia oxidizing bacteria and/or drop this kind of function bacteriums of COD.
9. a kind of mark that carries of industrial wastewater as claimed in claim 5 transforms biological treatment, it is characterised in that regulating reservoir (1)Pretreatment condition be:PH 6 ~ 9,10 ~ 50 DEG C of temperature.
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CN108002535A (en) * 2017-12-21 2018-05-08 北京北方节能环保有限公司 A kind of gentamicin pharmacy waste water nitration denitrification processing method
CN108101214A (en) * 2017-12-22 2018-06-01 太原理工大学 A kind of up-flow anaerobic sludge blanket-outer circulation drop oxygen-enriched reflux declines the technique of oxygen Sludge Bed Treating Municipal Sewage
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