CN1381409A - Microbial process for treating oil-contained emulsified sewage - Google Patents

Microbial process for treating oil-contained emulsified sewage Download PDF

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Publication number
CN1381409A
CN1381409A CN 02113095 CN02113095A CN1381409A CN 1381409 A CN1381409 A CN 1381409A CN 02113095 CN02113095 CN 02113095 CN 02113095 A CN02113095 A CN 02113095A CN 1381409 A CN1381409 A CN 1381409A
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sewage
microbial
aeration tank
water
regulating
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CN 02113095
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CN1272265C (en
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王娅娜
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Jiangsu Boda Environmental Protection Co., Ltd.
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王娅娜
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Publication of CN1272265C publication Critical patent/CN1272265C/en
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Abstract

A microbial process for treating the emulsified sewage containing oil features that a combined flora obtained through screening, inoculation and decontamination is added to the said sewage and the sewage flows through regulatable aerating pool, slane oil-removing pool and biologic aerating filter pool. Its advantages are short time (4-6 hr), and high removal rate of 98% for oil, or 95% for CODcr, or 95% for BOD5, so completely reaching the national standard for discharge.

Description

Microbial process for treating oil-contained emulsified sewage
Technical field
The invention belongs to water treatment field, relate to a kind of microbiological treatment technology of emulsifiable oil waste water.
Technical background
Oily(waste)waters such as the oil in water emulsion that industries such as oil production, ferrous metallurgy, oil refining, electric power and mechanical workout produce in production technique, petroleum-type oil, tensio-active agent, because of its complicated component, be difficult to handle to qualified discharge, conventional treatment process is to adopt steps such as dosing, breakdown of emulsion, coagulation, precipitation and strong oxidation, the problem that this technology exists is: 1) complex process, labour intensity is big, poor stability; 2) investment cost height; 3) working cost height, and be difficult to qualified discharge; 4) sludge quantity after the dosing is big, has the secondary pollution problem.In recent years; report with this type of waste water of microbiological treatment has appearred again; " experimental study that cold rolling wastewater is handled " (Shanghai environmental science-1997.016 (012)-0017-0019) as the dynamo-electric design and research institute in Shanghai, East China Normal University; adopt dosing precipitation+SBR biochemistry+sand filtration technology, Al is selected in dosing for use 2(SO 4) 3Coagulating agent, waste water is used the activated sludge process biochemical treatment behind coagulating sedimentation, this deficiency of utilizing the organism waste water treatment process in the active sludge to exist need to be dosing coagulant, sludge quantity is big, have secondary pollution, and the aeration time in the technology is long, needs 8 hours, the scope of application is narrow, and the oleaginousness in the waste water generally will be controlled at below the 50mg/l.
Summary of the invention
The present invention has overcome above-mentioned deficiency, the microorganism that utilization forms through screening, inoculation, purifying from occurring in nature, handle emulsifiable oil waste water, whole technology is simple, need not to be equipped with second pond, working cost is low, operation is convenient, sludge quantity is few, non-secondary pollution and the operation of remaining valid, qualified discharge.The present invention implements like this: microbial process for treating oil-contained emulsified sewage, it is characterized in that oily(waste)water handles and get final product water outlet through regulating aeration tank, swash plate grease removal tank, biological aerated filter, wherein: the water inlet condition of (1) oily(waste)water is: PH=6-8, temperature 8-35 ℃, COD Cr≤ 2000mg/l, oil≤250mg/l; (2) handling the starting stage, add the associating flora that forms from occurring in nature screening, inoculation, purifying in regulating aeration tank and biological aerated filter, described associating flora is made up of gemma Pseudomonas and utmost point Bacillaceae, and its activity is greater than 10 14Individual/gram; (3) regulate dissolved oxygen 〉=2mg/l in the aeration tank, hydraulic detention time is 2-6; (4) water-gas ratio in the biological aerated filter=1: 4-5, hydraulic detention time 0.5-2 hour.
In the technology of the present invention, temperature is especially with 25-35 ℃ of the best; PH value is controlled between the 6-8, makes the microbial growth environmental facies more loose to the PH=7 neutrallty condition, and suitability is also strong; The residence time of sewage in regulating the aeration tank was the best with 4-5 hour, and the residence time is very few, though the decomposition of oil is not subjected to big influence, was unfavorable for the degraded of COD; The residence time in the biological aerated filter was good with 1-1.5 hour.
Associating flora in the technology of the present invention is powdery or the tubular solids that has carrier, described carrier is made up of anti-tensio-active agent, cereal material, nutrient substance and buffer reagent etc., anti-tensio-active agent in the carrier can play dissemination to the complicated pollutent in the oily(waste)water, cereal material, nutrient substance and buffer reagent then offer enough nutritive elements of microorganism and growth factor, improve the treatment effect of microorganism; The activation of associating flora and addition method are: water (is united flora: water=1: 10) prewetted 25-45 minute with 1: 10 ratio, pour in the inoculation pond, after bubbling air 3-4 hour, drop into and regulate aeration tank and biological aerated filter, the input amount of regulating in the aeration tank is to handle the 0.01-0.02% of waste water weight, and the input amount of bio-aeration pool is for regulating the 60-80% of aeration tank input amount.
The associating flora is to drop into the starting stage of this technology commencement of commercial operation, and afterwards in service for keeping the advantage of bacterial classification, also can add some maintenances.
In the technology of the present invention, before regulating the aeration tank, also be provided with preliminary sedimentation tank and PH equalizing tank, preliminary sedimentation tank is used for the oarse-grained impurity of sedimentation water, guarantee the normal operation of post-order process, because of need not to add flocculation agent, this technology just can make water outlet up to standard, so do not establish second pond in the technology, simplified schedule of operation, saved investment and working cost.
In the technology of the present invention, the adjusting aeration tank and the biological aerated filter of employing, its body can be structures, also can be equipment.Regulate the built-up type soft-filler of selecting the easy demoulding of easy conjunctiva in the aeration tank, this filler relatively is fit to the microbial growth that this technology is selected for use, what the aerating apparatus of adjusting aeration tank was selected for use is the withstand voltage variable orifice aeration flexible pipe of acid-fast alkali-proof or boring aeration pipe or aeration head, can improve the utilization ratio of oxygen; Adopt the multistage ceramics filling of joining of porous of excellent property in the biological aerated filter, be mixed with organized enzyme in the ceramics filling, because of the Pollutant levels in the biological aerated filter reduce, this environment is unfavorable for microbial growth, can promote microorganism growth after in ceramics filling, mixing organized enzyme, improve biomass, guarantee comprehensive treating process efficient.
The present invention is directed to the water quality characteristics of emulsified oily watewater, the associating flora that selection forms through screening, inoculation, purifying from occurring in nature, because of its bacterial content height, make that the treatment time of whole technology is short, general needing only 4-6 hour, the oil concentration of influent waste water can reach 250mg/l, and the scope of application is extensive, oil degradation rate 〉=98%, COD CrClearance 〉=95%, BOD 5Clearance 〉=95%, the water after the processing reaches discharging standards fully.
Embodiment
Embodiment 1, microbial process for treating oil-contained emulsified sewage, the flowing through channel of waste water is: preliminary sedimentation tank-adjusting aeration tank-swash plate grease removal tank-biological aerated filter-water outlet, before debugging, promptly handling the starting stage, in regulating aeration tank and biological aerated filter, add the activation associating flora that forms from occurring in nature screening, inoculation, purifying, this associating flora is made up of gemma Pseudomonas and utmost point Bacillaceae, and its activity is greater than 10 14Individual, the associating flora is powdery or the tubular solids that has carrier, carrier is made up of anti-tensio-active agent, cereal material, nutrient substance and buffer reagent etc., the associating flora is such activatory before adding: water (is united flora: water=1: 10) prewetted 25-45 minute with 1: 10 ratio, pour in the inoculation pond, after bubbling air 3-4 hour, drop into and regulate aeration tank and biological aerated filter, the input amount of regulating in the aeration tank is to handle the 0.01-0.02% of waste water weight, and the input amount in the bio-aeration pool is the 60-80% of input amount in the aeration tank; Before advancing preliminary sedimentation tank, the influent waste water condition is adjusted in the following scope: PH=6-8, temperature 8-35 ℃, COD Cr≤ 2000mg/l, oil≤250mg/l, oily(waste)water is behind the oarse-grained impurity of preliminary sedimentation tank sedimentation, enter the adjusting aeration tank of dissolved oxygen 〉=2mg/l, hydraulic detention time in it was controlled at about 2-6 hour, water outlet enters biological aerated filter behind the swash plate grease removal tank, water-gas ratio in the biological aerated filter is controlled at 1: between the 4-5, hydraulic detention time was controlled at about 0.5-2 hour, can reach discharging standards through the water outlet of this worker's technology.
Embodiment 2, reference example 1, the inflow temperature of microbial process for treating oil-contained emulsified sewage is set between 25-35 ℃, the hydraulic detention time of regulating in the aeration tank was controlled at about 4-5 hour, hydraulic detention time in the biological aerated filter is controlled at about 1-1.5, technology in order to keep the advantage of flora, adds an amount of associating flora maintenance at operational process in addition in regulating aeration tank and biological aerated filter.
The body of regulating aeration tank and biological aerated filter in the technology of the present invention can be structures, also can be equipment; Regulate the built-up type soft-filler of selecting the easy demoulding of easy conjunctiva in the aeration tank, aerating apparatus is selected the withstand voltage variable orifice aeration flexible pipe of acid-fast alkali-proof or boring aeration pipe or aeration head for use; Adopt the multistage ceramics filling of joining of porous in the biological aerated filter, be mixed with organized enzyme in the ceramics filling.

Claims (9)

1. microbial process for treating oil-contained emulsified sewage is characterized in that oily(waste)water handles and get final product water outlet through regulating aeration tank, swash plate grease removal tank, biological aerated filter, and wherein: the water inlet condition of (1) oily(waste)water is: PH=6-8, temperature 8-35 ℃, COD Cr≤ 2000mg/l, oil≤250mg/l; (2) handling the starting stage, add the associating flora that forms from occurring in nature screening, inoculation, purifying in regulating aeration tank and biological aerated filter, described associating flora is made up of gemma Pseudomonas and utmost point Bacillaceae, and its activity is greater than 10 14Individual/gram; (3) regulate dissolved oxygen 〉=2mg/l in the aeration tank, hydraulic detention time is 2-6 hour; (4) water-gas ratio in the biological aerated filter=1: 4-5, hydraulic detention time 0.5-2 hour.
2. microbial process for treating oil-contained emulsified sewage according to claim 1, the inflow temperature that it is characterized in that oily(waste)water is the best with 25-35 ℃, the hydraulic detention time of regulating in the aeration tank is 4-5 hour, and the hydraulic detention time in the biological aerated filter is 1-1.5 hour.
3. microbial process for treating oil-contained emulsified sewage according to claim 1 and 2 is characterized in that the associating flora is powdery or the tubular solids that has carrier, and described carrier is made up of anti-tensio-active agent, cereal material, nutrient substance and buffer reagent etc.
4. microbial process for treating oil-contained emulsified sewage according to claim 3, the activation and the addition method that it is characterized in that the associating flora are: water (is united flora: water=1: 10) prewetted 25-45 minute with 1: 10 ratio, pour in the inoculation pond, after bubbling air 3-4 hour, drop into and regulate aeration tank and biological aerated filter, the input amount of regulating in the aeration tank is to handle the 0.01-0.02% of waste water weight, and the input amount in the bio-aeration pool is the 60-80% of input amount in the aeration tank.
5. microbial process for treating oil-contained emulsified sewage according to claim 4 is characterized in that regulating aeration tank and biological aerated filter and is in operation and also adds the maintenance of associating flora.
6. according to claim 1,2,4, one of 5 described microbial process for treating oil-contained emulsified sewage, also be provided with preliminary sedimentation tank and PH equalizing tank before it is characterized in that regulating the aeration tank.
7. microbial process for treating oil-contained emulsified sewage according to claim 1 and 2, the body that it is characterized in that regulating aeration tank and biological aerated filter can be structures, also can be equipment.
8. according to right 7 described microbial process for treating oil-contained emulsified sewage, it is characterized in that regulating the built-up type soft-filler of selecting the easy demoulding of easy conjunctiva in the aeration tank, aerating apparatus is selected the withstand voltage variable orifice aeration flexible pipe of acid-fast alkali-proof or boring aeration pipe or aeration head for use.
9. microbial process for treating oil-contained emulsified sewage according to claim 7 is characterized in that adopting the multistage ceramics filling of joining of porous in the biological aerated filter, is mixed with organized enzyme in the ceramics filling.
CN 02113095 2002-05-30 2002-05-30 Microbial process for treating oil-contained emulsified sewage Expired - Fee Related CN1272265C (en)

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CN 02113095 CN1272265C (en) 2002-05-30 2002-05-30 Microbial process for treating oil-contained emulsified sewage

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Application Number Priority Date Filing Date Title
CN 02113095 CN1272265C (en) 2002-05-30 2002-05-30 Microbial process for treating oil-contained emulsified sewage

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CN1381409A true CN1381409A (en) 2002-11-27
CN1272265C CN1272265C (en) 2006-08-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1313390C (en) * 2003-01-18 2007-05-02 王娅娜 Treatment method of water recovered from oil field refilling
CN101555072B (en) * 2009-04-23 2010-12-08 上海交通大学 Submersible micro-organism putting degreasing device
CN101935110A (en) * 2010-08-26 2011-01-05 北京首钢国际工程技术有限公司 Method for treating and recycling hot-rolling high-oil-containing waste water in iron and steel plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1313390C (en) * 2003-01-18 2007-05-02 王娅娜 Treatment method of water recovered from oil field refilling
CN101555072B (en) * 2009-04-23 2010-12-08 上海交通大学 Submersible micro-organism putting degreasing device
CN101935110A (en) * 2010-08-26 2011-01-05 北京首钢国际工程技术有限公司 Method for treating and recycling hot-rolling high-oil-containing waste water in iron and steel plant
CN101935110B (en) * 2010-08-26 2012-01-04 北京首钢国际工程技术有限公司 Method for treating and recycling hot-rolling high-oil-containing waste water in iron and steel plant

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Address after: Gaocheng Town Industrial Zone, Jiangsu city of Yixing province 214214

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