CN106927628A - Light electrolysis-Fenton-EGSB-A/O-BCO-BAF-coagulating treatment pharmacy waste water technique - Google Patents
Light electrolysis-Fenton-EGSB-A/O-BCO-BAF-coagulating treatment pharmacy waste water technique Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 26
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- 238000007254 oxidation reaction Methods 0.000 claims abstract description 11
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- 238000005516 engineering process Methods 0.000 abstract description 8
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/30—Organic compounds
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
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- C02F2303/02—Odour removal or prevention of malodour
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Abstract
A kind of light electrolysis-Fenton-EGSB-A/O-BCO-BAF-coagulating treatment pharmacy waste water technique, i.e. high concentration medical wastewater passes sequentially through oil interceptor, regulating reservoir, micro-electrolysis reaction pond, Fenton catalysis oxidizing tower, flat flow preliminary sedimentation tank, comprehensive adjustment pond, hydrolysis acidification pool, expanded granular sludge bed (EGSB), anoxic/Aerobic Pond（A/O）, two-stage biological contact-oxidation pool（BCO）, second pond, BAF (BAF), coagulating basin, flotation tank and final deposition pool process last qualified discharge.Mature technology of the present invention, treatment effect stabilization, capacity of resisting impact load is strong.Pharmacy waste water reaches by water outlet effluent quality after group technology treatment《Integrated wastewater discharge standard》(GB8978-1996) primary standard.
Description
Technical field
The present invention relates to a kind of light electrolysis, Fenton oxidation tower, expanded granular sludge bed (EGSB), anoxic/Aerobic Pond（A/
O）, two-stage biological contact-oxidation pool（BCO）, BAF (BAF), coagulating basin combined treatment pharmacy waste water technique belong to
Environmental Science and Engineering technical field.
Background technology
In recent years, China's pharmaceuticals industry is developed rapidly, and pharmacy corporation is large number of, and year produces tens of thousands of kinds and nearly million tons of medicines
Agent, pharmacy waste water yield is big, but annual handling rate is less than 30%.Because pharmacy waste water pollutant component is complicated, toxicity
Greatly, colourity is high, the change of difficult for biological degradation, water quality and quantity greatly, be one kind difficult to deal with industrial wastewater.Additionally, pharmacy waste water
In contain more Recalcitrant chemicals, these materials remain for a long time after entering water body, and have mostly have bio-toxicity and
" three cause " effect, by that can be enriched with human body after food chain, the health of harmful to human.If not carrying out depth for such waste water
Treatment, Pollutants in Wastewater cannot effectively degrade and serious breaking will be formed to the ecological environment on periphery with regard to discharge natural water
It is bad.
At present, kinds of processes and method, such as oxidation in chemical method have developed to high concentration medical wastewater treatment both at home and abroad
Method, electrolysis and advanced oxidation processes etc.；Coagulation, air supporting, ion-exchange in physico-chemical process etc.；UASB, EGSB in biochemical process
Deng.But not only operating cost is high for single processing means, and is difficult to qualified discharge.Research shows, light electrolysis, Fenton
（Fenton）Pretreatment of the oxidizing process to difficult degradation pharmacy waste water has good effect, can effectively improve the biochemical of waste water
Property.It is expanded granular sludge bed（EGSB）Mud granule is big, and COD clearances are high, high to SS contents, virose pharmacy wastewater treatment
Effect is good and is widely used.Therefore, in the engineering experience for using for reference domestic and international pharmacy wastewater treatment, find a kind of technology into
Ripe, effect stability, processing cost are low, capacity of resisting impact load is strong, operational administrative is simple, and can produce certain economy and Environmental Effect
The group technology of benefit, the problem of environmental pollution caused to solution high concentration medical wastewater is particularly important.
The content of the invention
The purpose of the present invention is directed to pharmacy waste water complicated component, and colourity is big, COD concentration is high, biodegradability is poor, difficult biological
A kind of the features such as degraded, it is proposed that light electrolysis-Fenton-CGSB（EGSB）- anoxic/Aerobic Pond（A/
O）- two-stage biological contact-oxidation pool（BCO）- BAF (BAF)-coagulating treatment pharmacy waste water technique.Pharmacy waste water
Reached by effluent quality after group technology treatment《Integrated wastewater discharge standard》(GB8978-1996) primary standard.
Realize the technical scheme is that:Using iron-carbon micro-electrolysis, Fenton catalysis oxidation, hydrolysis acidification, expanded granular
Sludge Bed (EGSB), anoxic/aerobic（A/O）, two-stage biological contact-oxidation pool（BCO), BAF（BAF), coagulation seven
Position integrated synthesis Pharmaceutical Wastewater Treatment.
The system of the Pharmaceutical Wastewater Treatment that the technique is taken is constituted:Expanded granular sludge bed（EGSB）Successively before
Oil interceptor, regulating reservoir, iron-carbon micro-electrolysis pond, Fenton catalysis oxidizing tower, flat flow preliminary sedimentation tank, comprehensive adjustment pond and hydrolysis acid are set
Change pond, expanded granular sludge bed（EGSB）Set up A/O ponds, two-stage BCO ponds, BAF ponds, second pond, coagulating basin, gas successively afterwards
Floating pond, final deposition pool.
The flat flow preliminary sedimentation tank, second pond, coagulating basin, BAF ponds, final deposition pool couple with sludge concentration tank, make five ponds
Sludge enters sludge concentration tank, and sludge concentration tank couples with plate and frame filter press, and mud cake is transported outward after sludge is dehydrated through plate and frame filter press,
Sludge concentration tank and plate and frame filter press are connected with regulating reservoir, and upper strata filtrate is back into regulating reservoir.It is expanded granular sludge bed
（EGSB）Reactor sets reflux pump, and water part is flowed back, dilution water inlet；Anoxic pond phase in two-stage BCO ponds and A/O ponds
Even, refluxing portion activated sludge to anoxic pond.
The technique is comprised the following steps：
(1）High concentration medical wastewater sequentially passes through oil interceptor and regulating reservoir carry out after the removal of oil slick and the regulation of water quality and quantity by
Elevator pump is promoted to iron-carbon micro-electrolysis pond；
（2）Iron carbon filler is filled in iron-carbon micro-electrolysis pond, nothing is formed using the potential difference between the acidity and iron-carbon particle of waste water
Several trickle galvanic cells produce electrochemical reaction and make the de- steady aggregation of charged colloidal particles under electric microfield effect and settle, and improve waste water
In B/C values, efficiently removal COD simultaneously reduce colourity and salinity；
（3）The water outlet of iron-carbon micro-electrolysis pond is promoted to Fenton catalysis oxidizing tower and adds H by pump2O2, make the Fe in waste water2+With
H2O2The extremely strong OH free-radical oxidations organic matter of electronegativity is generated after generation chain reaction and hard-degraded substance is decomposed；Utilize simultaneously
Fe(OH)3Flocculation organics removal and further reduce colourity and salinity, be greatly reduced subsequent technique organic matter bear
Lotus；
（4）Precipitation at the beginning of Fenton catalysis oxidizing tower water outlet into flat flow carries out waterpower clarification, the Fenton oxygen remained in removal waste water
Flocculate generation iron cement flco and suspended particulate substance in change；
（5）Preliminary sedimentation tank water outlet enters comprehensive adjustment pond regulating water quality water and pH, while by the low concentration pharmacy waste water of 200t/d
Sanitary sewage with 50t/d accesses comprehensive adjustment pond, and is sufficiently mixed with waste water in pond, and dilution reduces COD concentration simultaneously
Improve the biodegradability of waste water；
（6）The water outlet of comprehensive adjustment pond flows into hydrolysis acidification pool and expanded granular sludge bed successively（EGSB）Carry out anaerobic reaction utilization
The hydrolysis reduction Biostatic of heterotroph simultaneously carries out producing acid and methane phase two benches anaerobic reaction, by larger molecular organicses
It is decomposed into small molecular organic acid and then improves wastewater biodegradability.It is expanded granular sludge bed（EGSB）Reflux pump returns part water outlet
Stream, is homogenized water quality, reduces impact load, reduces murder by poisoning inhibitory action of the pollutant to microorganism；
（7）It is expanded granular sludge bed（EGSB）Water outlet gravity flow sequentially enters A/O ponds, two-stage BCO ponds and BAF ponds, using aerobic/scarce
Oxygen environment alternating action, denitrifier nitrify/and denitrification denitrogenation, polyP bacteria carry out releasing phosphorus and inhale phosphorus reaction, and carry out depth and take off
Nitrogen dephosphorization and the further organic matter of removal waste water；Sludge part is back to the anoxic pond in A/O ponds and can improve work in two-stage BCO ponds
Property sludge concentration, improve treatment effect；
(8）The water outlet of BAF ponds through second pond stand after supernatant overflow enter coagulating basin, after suspended particulate is removed by flotation tank again
Thing, final outflow water reaches《Integrated wastewater discharge standard》(GB8978-1996) primary standard, and enter place garden sewage disposal
Factory is processed；
(9) sludge of flat flow preliminary sedimentation tank, second pond, coagulating basin, BAF and final deposition pool is pooled to sludge concentration tank
It is dehydrated through plate and frame filter press again after concentration, dry mud cake outward transport.
The advantage of the invention is that:
Light electrolysis-Fenton is combined as the pretreating process of high concentration medical wastewater, can significantly be removed in waste water COD and be played
Desalination, decolouring, except stench etc. is acted on, the treatment load of subsequent bio technique, the normal operation of safeguards system can be greatly reduced.This
Outward, compared to additional Fe2+Fenton reagent is formed, substantial amounts of Fe is contained in micro cell2+, medicament expense can be saved and played " with useless
Control useless " effect.This technique can simultaneously process high-concentration waste water, low concentration wastewater and sanitary sewage so that three kinds of waste water are equal
Mark discharge.The waste water mixed diluting effect of low concentration wastewater and sanitary sewage to high concentration is taken full advantage of, waste water is reduced
Organic concentration simultaneously improves the biodegradability of waste water.Hydrolysis acidification-EGSB reactor tandems, hydrolysis acidification pool can greatly
Molecular organic is hydrolyzed to small molecular organic acid, improves the biodegradability of waste water, reduces expanded granular sludge bed（EGSB）Carry out
Anaerobic Treatment load.It is expanded granular sludge bed（EGSB）SS can be significantly removed, while can be homogenized by the way of effluent recycling
Water quality, reduces impact load, reduces murder by poisoning inhibitory action of the pollutant to microorganism.A/O- two-stages BCO-BAF tri- goes here and there in pond successively
Connection, can intensified denitrification and dephosphorization effect.Sludge part is back to the anoxic pond in A/O ponds and can improve activated sludge in two-stage BCO ponds
Concentration, improves treatment effect.Significantly, percent of decolourization reaches more than 90% to the tandem process decolorizing effect.Coagulation-air supporting combination can be carried
The clearance of the biomembrane that is come off to FEOL to technique of height and activated sludge particle simultaneously thoroughly trickle in removal waste water
Thing and colloidal substance etc., improve effluent quality.This technique capacity of resisting impact load is strong, technology maturation, treatment effect stabilization, is adapted to
Scale pharmacy wastewater treatment and Technique Popularizing.Waste water is by after the treatment of this group technology, final outflow water water quality reaches《Sewage is comprehensive
Close discharge standard》(GB8978-1996) primary standard.
Brief description of the drawings
Fig. 1 is light electrolysis-Fenton-EGSB-A/O-BCO-BAF- coagulating treatment pharmacy waste water process schematic representations.
Specific embodiment
Treating capacity is 300m3The pharmacy waste water of/d（Containing high-concentration waste water be 50t/d, low concentration wastewater be 200t/d, life
Sewage is 50t/d）, wherein high-concentration waste water water quality：CODCr 85000~90000mg/L, NH3- N 150~200mg/L, TP
3~6mg/L of 70~100mg/L, pH.Low concentration wastewater water quality：CODCr 7000~8000mg/L, NH3120~150mg/ of-N
3~8mg/L of L, TP 30~50mg/L, pH.Sanitary sewage water-quality COD Cr 200~400mg/L, NH320~30mg/L of-N,
7~8mg/L of TP 3~5mg/L, pH.High concentration medical wastewater sequentially passes through oil interceptor and regulating reservoir carry out oil slick removal and
Iron-carbon micro-electrolysis pond is promoted to by elevator pump after the regulation of water quality and quantity.Iron carbon electrolytic cell utilizes the acid and iron-carbon of waste water
Potential difference between grain forms numerous trickle galvanic cell and produces electrochemical reaction and take off charged colloidal particles under electric microfield effect
Surely assemble and settle, improve the B/C values in waste water, efficiently removal COD simultaneously reduces colourity and salinity.The water outlet of iron-carbon micro-electrolysis pond
CODCr 40000~50000mg/L, NH33~4mg/L of-N 150~180mg/L, TP 70~100mg/L, pH.The micro- electricity of iron carbon
Solution pond water outlet is promoted to Fenton catalysis oxidizing tower and adds H by pump2O2, make the Fe in waste water2+With H2O2After producing chain reaction
The extremely strong OH free-radical oxidations organic matter of generation electronegativity simultaneously decomposes hard-degraded substance.Simultaneously using Fe (OH)3Flocculation
Organics removal simultaneously further reduces colourity and salinity, reduces the organic loading of subsequent technique.Fenton catalysis oxidizing tower water outlet
CODCr 25000~30000mg/L, NH37~8mg/L of-N 150~180mg/L, TP 40~50mg/L, pH.Fenton is catalyzed
Precipitation at the beginning of oxidizing tower water outlet into flat flow carries out waterpower clarification, generation iron cement of being flocculated in the Fenton oxidation remained in removal waste water
Flco and suspended particulate substance.Then waste water outflow enters comprehensive adjustment pond and mixes with low concentration wastewater and sanitary sewage, comprehensive precipitation
Pond water outlet CODCr 10000~12000mg/L, NH37~8mg/L of-N 150~180mg/L, TP 30~40mg/L, pH.It is comprehensive
Conjunction regulating reservoir water outlet is flowed into hydrolysis acidification pool and EGSB reactors and carries out anaerobic reaction and dropped using the hydrolysis of heterotroph successively
Low Biostatic simultaneously is carried out producing acid and methane phase two benches anaerobic reaction, and larger molecular organicses are decomposed into small molecular organic acid
And then improve wastewater biodegradability.It is expanded granular sludge bed（EGSB）Pond water outlet CODCr 1500~2000mg/L, NH3- N 8~
7~8mg/L of 100mg/L, TP 20~30mg/L, pH.It is expanded granular sludge bed（EGSB）Water outlet gravity flow sequentially enter A/O ponds,
Two-stage BCO ponds and BAF ponds, using aerobic/anaerobic environment alternating action, denitrifier nitrify/and denitrification denitrogenation, polyP bacteria enter
Row releases phosphorus and inhales phosphorus reaction, carries out advanced nitrogen dephosphorization and further removes the organic matter of waste water.Its water outlet gravity flow is sequentially entered
A/O ponds Aerobic Pond water outlet CODCr 500~700mg/L, NH37~8mg/L of-N 20~30mg/L, TP 5~10mg/L, pH.
Two-stage BCO pond water outlet CODCr 150~200mg/L, NH37~8mg/L of-N 15~20mg/L, TP 1~5mg/L, pH.BAF
Pond water outlet CODCr 100~150mg/L, NH37~8mg/L of-N 15~20mg/L, TP 0.5~1.0mg/L, pH.BAF ponds go out
Water through second pond stand after supernatant overflow enter coagulating basin, after suspended particulate substance, final outflow water water quality are removed by flotation tank again
CODCr 80~100mg/L, NH37~8mg/L of-N 10~15mg/L, TP 0.1~0.5mg/L, pH.Reach《Integrated wastewater
Discharge standard》(GB8978-1996) primary standard in, and garden sewage treatment plant is processed where entering.Wherein advection
The sludge of formula preliminary sedimentation tank, second pond, coagulating basin, BAF and final deposition pool is pooled to after sludge concentration tank is concentrated again through plate
Frame filter press is dehydrated, mud cake outward transport.
Claims (1)
1. a kind of light electrolysis-Fenton-EGSB-A/O-BCO-BAF-coagulating treatment pharmacy waste water technique, it is characterized in that：
(1）High concentration medical wastewater sequentially passes through oil interceptor and after regulating reservoir carries out the removal of oil slick and the regulation of water quality and quantity
Iron-carbon micro-electrolysis pond is promoted to by elevator pump；
（2）Iron carbon filler is filled in iron-carbon micro-electrolysis pond, is formed using the potential difference between the acidity and iron-carbon particle of waste water
Numerous trickle galvanic cell produces electrochemical reaction and makes the de- steady aggregation of charged colloidal particles under electric microfield effect and settle, and improves useless
B/C values in water, efficiently remove COD and reduce colourity and salinity；
（3）The water outlet of iron-carbon micro-electrolysis pond is promoted to Fenton catalysis oxidizing tower and adds H by pump2O2, make the Fe in waste water2+With
H2O2The extremely strong OH free-radical oxidations organic matter of electronegativity is generated after generation chain reaction and hard-degraded substance is decomposed；
Simultaneously using Fe (OH)3Flocculation organics removal and further reduce colourity and salinity, subsequent technique is greatly reduced
Organic loading；
（4）Precipitation at the beginning of Fenton catalysis oxidizing tower water outlet into flat flow carries out waterpower clarification, the Fenton oxygen remained in removal waste water
Flocculate generation iron cement flco and suspended particulate substance in change；
（5）Preliminary sedimentation tank water outlet enters comprehensive adjustment pond regulating water quality water and pH, while by the low concentration pharmacy waste water of 200t/d
Sanitary sewage with 50t/d accesses comprehensive adjustment pond, and is sufficiently mixed with waste water in pond, and dilution reduces COD concentration simultaneously
Improve the biodegradability of waste water；
（6）The water outlet of comprehensive adjustment pond flows into hydrolysis acidification pool and expanded granular sludge bed EGSB and carries out anaerobic reaction using different successively
The hydrolysis reduction Biostatic of bacteria simultaneously carries out producing acid and methane phase two benches anaerobic reaction, by larger molecular organicses point
Solve as small molecular organic acid and then improve wastewater biodegradability；Part effluent recycling is homogenized water quality by EGSB reactors reflux pump,
Reduce impact load, reduce murder by poisoning inhibitory action of the pollutant to microorganism；
（7）Expanded granular sludge bed i.e. EGSB reactors water outlet gravity flow sequentially enters A/O ponds, two-stage BCO ponds and BAF ponds, utilizes
Aerobic/anaerobic environment alternating action, denitrifier nitrify/and denitrification denitrogenation, polyP bacteria carry out releasing phosphorus and inhale phosphorus reaction, carry out
Advanced nitrogen dephosphorization and the further organic matter of removal waste water：In two-stage BCO ponds sludge part be back to the anoxic pond in A/O ponds can
Activated sludge concentration is improved, treatment effect is improved；
(8）The water outlet of BAF ponds through second pond stand after supernatant overflow enter coagulating basin, after suspended particulate is removed by flotation tank again
Thing, and garden sewage treatment plant is processed where entering；
(9) sludge of flat flow preliminary sedimentation tank, second pond, coagulating basin, BAF and final deposition pool is pooled to sludge concentration tank
It is dehydrated through plate and frame filter press again after concentration, mud cake outward transport.
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