CN105417897A - Treatment system of wastewater difficult to degrade through biochemistry - Google Patents
Treatment system of wastewater difficult to degrade through biochemistry Download PDFInfo
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- CN105417897A CN105417897A CN201610014601.7A CN201610014601A CN105417897A CN 105417897 A CN105417897 A CN 105417897A CN 201610014601 A CN201610014601 A CN 201610014601A CN 105417897 A CN105417897 A CN 105417897A
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- baf
- aeration
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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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- 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
- C02F3/02—Aerobic processes
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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
Abstract
The invention provides a treatment system of wastewater difficult to degrade through biochemistry, and belongs to the field of wastewater treatment. The treatment system is formed by sequentially connecting two stages of semi-aerobic biological membrane filters, an activated carbon biological aerated filter and a suspended filler biological aerated filter. Each semi-aerobic biological membrane filter is an anaerobic-semi-aerobic bio-filter bed, a bottom layer of the filter bed is formed by gravel filler with the particle size ranging from 60 mm to 80 mm, a middle layer of the filter bed is formed by gravel filler with the particle size ranging from 10 mm to 50 mm, and an upper layer of the filter bed is formed by fine sand with the particle size of 1.5 mm; the activated carbon biological aerated filter is filled with activated carbon filler, an aeration device and a back flush device are installed in the activated carbon biological aerated filter, and the aeration mode adopts filter bottom aeration; the suspended filler biological aerated filter is filled with cylindrical polyethylene plastic filler, an aeration device is installed in the suspended filler biological aerated filter, and the aeration mode adopts filter bottom aeration. According to the treatment system of the wastewater difficult to degrade through the biochemistry, the reoxygenation effect is good, the cost is low, continuous water intake is achieved, the impact load is higher, operation management is easy and convenient, and the treatment effect is stable and reaches the standard.
Description
Technical field
The invention belongs to field of waste water treatment, be specifically related to a kind for the treatment of system of bio-refractory waste water.
Background technology
The environmental protection disposal of bio-refractory waste water and reuse are one of difficult problems of facing of Industrial-Enterprises in China all the time.Bio-refractory waste water kind is complicated, and based on trade effluent, industry relates to petrochemical complex, printing and dyeing, plating, pulping and paper-making, pharmacy, agricultural chemicals and food etc., principal feature is that organic concentration is large, high toxicity, high chroma and high salinity, BOD/COD ratio is less than 0.3.The bio-refractory waste water treatment process that Chinese patent CN1295033 and CN101607751 provides all needs to use electrooxidation method, and energy consumption is high, and working cost is high, and operational administrative is complicated, and treatment effect is unstable.Bacteria bed system (BiofilterSystem) grows up on traditional wastewater land percolation treatment system basis, usual employing waterflooding and the dry mode of operation alternated that falls, utilize soil aquifer to carry out comprehensive treating process to sewage, by retaining, biodegradable synergy makes pollutent be removed.The feature of this technology, for not need to add medicament, does not also need high-energy equipment, reduces investment and the running expense for the treatment of facility.But it is large that traditional system still exists floor space, the problem that processing efficiency is lower and anti-shock loading is low, can not be applicable to the process of bio-refractory waste water.BAF BAF (BiologicalAeratedFilter) is a kind of catalytic oxidation biomembrance process grown up on ordinary biofilter in recent years, namely its maximum feature is integrate bio-oxidation and retain suspended solids, save follow-up secondary sedimentation basins, floor space is little, organic volumetric loading is high, and hydraulic load is large, and hydraulic detention time is short, be widely used in sanitary sewage, and in the process of the difficult biochemical waste water such as Partial Food processing waste water, malting effluent.But its structure and operation are comparatively complicated, and energy consumption is relative also higher, and treatment effect does not still reach " urban wastewater treatment firm pollutant emission standard ".
Summary of the invention
The object of the invention is to overcome working cost in prior art high, operational administrative is complicated, the defect that processing efficiency is lower, there is provided that a kind of reoxygenation is effective, low cost, continuum micromeehanics and impact load is higher, operational administrative is easy, the treatment system of the bio-refractory waste water for the treatment of effect stably reaching standard.
The object of the invention is to be achieved through the following technical solutions:
The treatment system of bio-refractory waste water of the present invention is connected in sequence by two-stage half aerobic biologic membrane filter tank, gac BAF and floating stuffing BAF, it is characterized in that half aerobic biologic membrane filter tank is anaerobism-half aerobe filter bed, Inlet and outlet water mode adopts top water inlet bottom water outlet, filter bed bottom is the gravel filling of particle diameter 60 ~ 80mm, middle level is the gravel filling of particle diameter 10 ~ 50mm, and upper strata is the washed ore of particle diameter 1.5mm; Gac BAF Inlet and outlet water mode adopts top water inlet bottom water outlet, loads active carbon filler in pond, and install aerating apparatus and backwashing equipment, aeration mode is aeration bottom filter tank; Floating stuffing BAF Inlet and outlet water mode adopts bottom water inlet top water outlet, loads cylindrical polyethylene plastic filler in pond, and install aerating apparatus, aeration mode is aeration bottom filter tank.
In such scheme, before described half aerobic biologic membrane filter tank, be provided with cloth pond.
In such scheme, described aerating apparatus is connected to form by blower fan and pipeline, and backwashing equipment is connected to form by recoil water pump and back flushing water pipe, carries out watercourse aeration and back flushing respectively to gac BAF and floating stuffing BAF.
In such scheme, described gac BAF is connected with secondary half aerobic biologic membrane filter tank by intermediate pool.
In such scheme, described floating stuffing BAF is connected successively with settling tank and clean water basin.
The present invention adopts four unit, be respectively one-level half aerobic biologic membrane filter tank, secondary half aerobic biologic membrane filter tank, gac BAF and floating stuffing BAF, with half aerobic biologic membrane filter tank for core, auxiliary two-stage biofilter process, increases processing efficiency, increases oxidation effectiveness.
Working process of the present invention is as follows:
(1) one-level half aerobic biologic membrane filter tank: bio-refractory waste water suction one-level half aerobic biologic membrane filter tank is processed.
(2) secondary half aerobic biologic membrane filter tank: the waste water pump processed by one-level half aerobic biologic membrane filter tank input secondary half aerobic biologic membrane filter tank is processed;
(3) gac BAF: the waste water through the process of secondary half aerobic biologic membrane filter tank enters intermediate pool, promoted by pump again and enter the process of gac BAF, by blower fan, Air Exposure is carried out to filter tank, regulate aeration rate, observe gac biofilm situation simultaneously;
(4) floating stuffing BAF: again the waste water through the process of gac BAF is entered floating stuffing biological filter tank from bottom and carry out Air Exposure, control oxygen in water amount, realize dissolved oxygen Gradient distribution environment, realize anaerobism in biological filter, the symbiosis of hold concurrently oxygen and aerobic three kinds of microorganisms, to realize the object of the pollutent such as organics removal and ammonia nitrogen, waste water after the process of floating stuffing BAF enters settling tank and clean water basin, discharge up to standard or reuse.
Sewage disposal principle of the present invention is:
Half aerobic biologic membrane filter tank system utilizes the biological process of the natural physical filtering of artificial soil, absorption and microorganism, makes sewage be able to rough purification, particularly relieves the bio-toxicity of bio-refractory waste water, be conducive to the microorganism growth in next step process.
Gac and floating stuffing BAF are a kind of biological filters be based upon in microbial film process, it is the granular filler loading high-specific surface area in filter tank, the carrier grown to provide microbial film, at filter material layer blowing air down aeration, make air reverse with sewage or contact in the same way, organism in sewage and filling surface microbial film are degraded by biochemical reaction, and filler plays physical filtering effect simultaneously.And not being both of activated carbon filter and Suspended Media Filter Bed, activated carbon granule, except playing biofilm bio-oxidation, can also retain absorbed portion organism, and its adsorption is greater than floating stuffing, and floating stuffing filtering feature is easier biofilm, be easy to biochemical treatment.
Difficult biochemical waste water is generally the tail water after anaerobic-aerobic process, its biodegradability extreme difference, advanced treatment is very difficult, key is that characteristic microorganism is difficult to cultivate, must reduce in waste water in front end and have inhibiting material to biochemical treatment, form single-minded flora, and improve wastewater biodegradability.
The feature of the difficult biochemical waste water of process of the present invention is the creationary multiple-stage treatment employing gac, high efficiency packing and the coupling of microbial film filter tank of BAF.Gac has two effects, and one is the organic substance of some bio-refractory of absorption, and the micropore of its two gac and great specific surface area are the place that exclusive aerobic microbiological flora provides growth and catalytic oxidation.And efficient floating stuffing aeration biological filter chamber treatment system, its feature is easy to be filmed, and biomass is large, as consistent in difficult biochemical waste water character, better, then after biofilm, the tolerance of microorganism is more consistent with specificity for operation, effect of inoculation, comparatively obvious for the difficult biochemical waste water effect of process.But its shortcoming is that the microorganism species cultivated is more single, and tolerance is general, once larger change occurs waste water quality, its aerobic microbiological treatment effect may be given a discount.Therefore, the present invention adds two-stage half aerobic biologic membrane filter tank in front end, using the grit of different-grain diameter as filler, formed from top to bottom in whole filter tank half aerobic to anaerobism again to half aerobic environment, cultivate exclusive microorganism, the chain rupture at initial stage carried out to difficult biochemical waste water and clears up, its macromole is made to be converted into small molecules, aerobic treatment for subordinate's BAF has good effect, is filtered simultaneously also play reduction organic loading by grit, the effect of removing macrobead and partial decolorization.The present invention has obvious and stable treatment effect for the difficult biochemical waste water (as wastewater from chemical industry) of load lower (200 ~ 400mg/L), and desirable to removing effectiveness comparison while ammonia nitrogen, and waste water can be stablized and reaches relevant criterion and discharge.
Beneficial effect of the present invention is: technique is practical, treatment effect is stablized, the scope of application is wider, the total system of number of chemical pail pack Cleaning Wastewater can also be developed based on this, facility structure is simple and maintenance is simple, maintenance cost is low, actual processing effect is: be about 25 DEG C in temperature, one cubic meter of water processing cost is about 0.7 yuan, COD process clearance can reach 70%, colourity, and the parameters such as ammonia nitrogen all can be up to state standards discharge, secondary pollution is not caused to environment, and reaches Treated sewage reusing water inlet index completely.The trade effluent water quality of not easily biochemical treatment after front-end processing can be made to reach or be better than " urban wastewater treatment firm pollutant emission standard " (GB18919-2002) one-level B standard.The each unit of the present invention both can be used as the pre-treating technology of biological treatment, be conducive to sedimentation and the bio-film colonization of mud, also after can be used as biochemical processing process, the individual curing method of the extremely difficult biochemical waste water of underload uses, can realize further reducing the pollutent index such as COD, ammonia nitrogen and decolouring and deodorizing, treatment effect stably reaching standard.The present invention is applied widely, and processing power is strong, is not only applicable to tail end and the advanced treatment of trade effluent, can also be used for the process of other sanitary sewages.
Therefore, instant invention overcomes working cost in prior art high, operational administrative is complicated, the defect that processing efficiency is lower, the treatment system reoxygenation of the bio-refractory waste water provided is effective, low cost, continuum micromeehanics and impact load is higher, operational administrative is easy, treatment effect stably reaching standard.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is underload microbial film filter tank of the present invention schematic diagram.
Fig. 3 is the N-N diagrammatic cross-section of Fig. 2.
Fig. 4 is gac BAF of the present invention and floating stuffing BAF schematic diagram.
In accompanying drawing, 1: water distributor, 2: water inlet pipe, 3: water outlet, 4: waterwall, 5: gac BAF aeration inlet pipe, 6: active carbon filler, 7: gac BAF aeration head, 8: recoil water pump, 9: back flushing water pipe, 10: blower fan escape pipe, 11: floating stuffing BAF aeration inlet pipe, 12: floating stuffing, 13: floating stuffing BAF aeration head, 14: concrete walls.
Embodiment
Be described in further detail the present invention below in conjunction with drawings and Examples, but the present invention is not limited only to described embodiment.
Embodiment one
The treatment system of the bio-refractory waste water of this example is as Fig. 1, Fig. 2, shown in Fig. 3 and Fig. 4, by two-stage half aerobic biologic membrane filter tank, gac BAF and floating stuffing BAF are connected in sequence, half aerobic biologic membrane filter tank is anaerobism-half aerobe filter bed, it is concrete foundation at the bottom of pond, sidewall waterwall 4 is brick, water distribution system pipe fitting all adopts polyvinyl chloride (PVC) RESINS (UPVC) material, Inlet and outlet water mode adopts top water inlet bottom water outlet, bottom filling adopts gravel rebasing, particle diameter 60 ~ 80mm, this layer thickness is about 400mm, middle part adopts particle diameter to be 10 ~ 50mm gravel filling, thickness 300mm, top adopts particle diameter 1.5mm washed ore, thickness is 600mm.Gac BAF Inlet and outlet water mode adopts top water inlet bottom water outlet, loads active carbon filler 6 in pond, and active carbon filler 6 adopts φ 5 × 8mm columnar activated carbon, and thickness of filter bed is 2400mm; Install aerating apparatus and backwashing equipment, aeration mode is aeration bottom filter tank.Floating stuffing BAF Inlet and outlet water mode adopts bottom water inlet top water outlet, and the floating stuffing 12 loaded in pond is cylindrical polyethylene plastic filler, size φ 25 × 9mm, specific surface area 8m
2about/g, floating stuffing layer height 2000mm; Install aerating apparatus, aeration mode is aeration bottom filter tank.
Cloth pond is provided with before half aerobic biologic membrane filter tank.
The aerating apparatus of gac BAF is connected to form by blower fan escape pipe 10 and gac BAF aeration inlet pipe 5 and gac BAF aeration head 7, carries out watercourse aeration to gac BAF.The backwashing equipment of gac BAF is connected to form by back flushing water pipe 9, recoil water pump 8 and gac BAF aeration head 7, carries out back flushing to gac BAF.
The aerating apparatus of floating stuffing BAF is connected to form by blower fan escape pipe 10 and floating stuffing BAF aeration inlet pipe 11 and floating stuffing BAF aeration head 13, carries out watercourse aeration to floating stuffing BAF.
Gac BAF is connected with secondary half aerobic biologic membrane filter tank by intermediate pool.
Floating stuffing BAF is connected successively with settling tank and clean water basin.
System hydraulic load is 0.2 ~ 2m
3/ (m
2d), 1d:3d(water distribution 1d, runs 3d).
Monitoring result shows, the Cleaning Wastewater through front-end processing enters the COD average out to 200mg/L of half aerobic biologic membrane filter tank system after a series of processing unit, NH
3-N is 5mg/L, after the treatment system process of the bio-refractory waste water of this example, and water outlet COD average out to 60mg/L, NH
3-N is 0mg/L, COD clearance is 70%, NH
3-N clearance is 100%.Sewage effluent quality reaches " urban wastewater treatment firm pollutant emission standard " (GB18919-2002) one-level B standard.
Experimental data shows: after stable, in difficult biochemical wastewater from chemical industry, COD is 235.2 ~ 311.1mg/L, 169.6 ~ 192.6mg/L is reduced to behind one-level half aerobic biologic membrane filter tank, be 143.5 ~ 166.4mg/L after secondary, being 73.41 ~ 104.4mg/L through gac aerating filter, is 47.4 ~ 68.1mg/L after floating stuffing aerating filter.
Under increasing waste water load COD is 500mg/L condition, last water outlet COD, at 82.9mg/L, meets national sewage comprehensive emission standard.
Embodiment two
The treatment system of the bio-refractory waste water of this example is not except having cloth pond before half aerobic biologic membrane filter tank, and all the other are with embodiment one.
Embodiment three
The treatment system of the bio-refractory waste water of this example is except not having intermediate pool, and outside gac BAF is directly connected with secondary half aerobic biologic membrane filter tank, all the other are with embodiment one.
Claims (5)
1. the treatment system of a bio-refractory waste water, be connected in sequence by two-stage half aerobic biologic membrane filter tank, gac BAF and floating stuffing BAF, it is characterized in that half aerobic biologic membrane filter tank is anaerobism-half aerobe filter bed, Inlet and outlet water mode adopts top water inlet bottom water outlet, filter bed bottom is the gravel filling of particle diameter 60 ~ 80mm, middle level is the gravel filling of particle diameter 10 ~ 50mm, and upper strata is the washed ore of particle diameter 1.5mm; Gac BAF Inlet and outlet water mode adopts top water inlet bottom water outlet, loads active carbon filler in pond, and install aerating apparatus and backwashing equipment, aeration mode is aeration bottom filter tank; Floating stuffing BAF Inlet and outlet water mode adopts bottom water inlet top water outlet, loads cylindrical polyethylene plastic filler in pond, and install aerating apparatus, aeration mode is aeration bottom filter tank.
2. the treatment system of bio-refractory waste water according to claim 1, is characterized in that being provided with cloth pond before described half aerobic biologic membrane filter tank.
3. the treatment system of bio-refractory waste water according to claim 1, it is characterized in that described aerating apparatus is connected to form by blower fan and pipeline, backwashing equipment is connected to form by recoil water pump and back flushing water pipe, carries out watercourse aeration and back flushing respectively to gac BAF and floating stuffing BAF.
4. the treatment system of bio-refractory waste water according to claim 1, is characterized in that described gac BAF is connected with secondary half aerobic biologic membrane filter tank by intermediate pool.
5. the treatment system of bio-refractory waste water according to claim 1, is characterized in that described floating stuffing BAF is connected successively with settling tank and clean water basin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610014601.7A CN105417897B (en) | 2016-01-11 | 2016-01-11 | The processing system of bio-refractory waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777848A (en) * | 2020-12-13 | 2021-05-11 | 中海油天津化工研究设计院有限公司 | Membrane aeration biological activated carbon bed advanced treatment system and method |
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| EP2147711A1 (en) * | 2008-07-24 | 2010-01-27 | Norit Nederland B.V. | Water purification system using flocculation and biological filtration |
| CN102476863A (en) * | 2010-11-24 | 2012-05-30 | 天津市塘沽区鑫宇环保科技有限公司 | Enhanced biochemical treatment method for high ammonia-nitrogen wastewater |
| CN104876395A (en) * | 2015-05-14 | 2015-09-02 | 哈尔滨工业大学 | Two-stage deep-bed upward flow composite filter material biological filter and method for treating low-temperature high-ammonium-nitrogen polluted water by utilizing same |
| CN205347141U (en) * | 2016-01-11 | 2016-06-29 | 四川省环境保护科学研究院 | Processing system of difficult biochemical degradation waste water |
-
2016
- 2016-01-11 CN CN201610014601.7A patent/CN105417897B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2147711A1 (en) * | 2008-07-24 | 2010-01-27 | Norit Nederland B.V. | Water purification system using flocculation and biological filtration |
| CN102476863A (en) * | 2010-11-24 | 2012-05-30 | 天津市塘沽区鑫宇环保科技有限公司 | Enhanced biochemical treatment method for high ammonia-nitrogen wastewater |
| CN104876395A (en) * | 2015-05-14 | 2015-09-02 | 哈尔滨工业大学 | Two-stage deep-bed upward flow composite filter material biological filter and method for treating low-temperature high-ammonium-nitrogen polluted water by utilizing same |
| CN205347141U (en) * | 2016-01-11 | 2016-06-29 | 四川省环境保护科学研究院 | Processing system of difficult biochemical degradation waste water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777848A (en) * | 2020-12-13 | 2021-05-11 | 中海油天津化工研究设计院有限公司 | Membrane aeration biological activated carbon bed advanced treatment system and method |
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