CN101492228A - Treating method for industrial sewage containing roily oil - Google Patents
Treating method for industrial sewage containing roily oil Download PDFInfo
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- CN101492228A CN101492228A CNA2009100470538A CN200910047053A CN101492228A CN 101492228 A CN101492228 A CN 101492228A CN A2009100470538 A CNA2009100470538 A CN A2009100470538A CN 200910047053 A CN200910047053 A CN 200910047053A CN 101492228 A CN101492228 A CN 101492228A
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Abstract
The invention relates to a method for treating industrial sewage containing emulsified oil, which belongs to the technical field of industrial sewage treatment. The method comprises the following steps: treating the industrial sewage containing the emulsified oil flowing into an adjusting tank by a revolving drum oil eliminator first, then performing coagulation treatment and air floatation treatment on the water eliminated with oil slick so as to break the emulsified oil and separate the oil from the water, and performing anaerobic treatment and aerobic treatment on the sewage to further reduce the concentration of organic substances in the water so that the treated water reaches a first level standard stated in GB8978-1996. The method has the advantages of simple treatment process flow, small construction investment, small occupied space for facilities, simple and convenient maintenance and management and stable treatment effect, and can make the water quality after the treatment reach the first level standard stated in the GB8978-1996.
Description
Technical field
The present invention relates to a kind of treatment process that contains the oil in water emulsion industrial sewage, relate in particular to the treatment process that a kind of steel mill and engineering works contain high-concentration emulsified oil sewage, belong to the industrial sewage treatment technology field.
Background technology
A large amount of emulsification wet goods is contained cold rolling containing in engineering works and steel mill in the emulsifying greasy dirt water, quantity of wastewater effluent changes greatly, change of water quality also greatly.Usually COD (chemical oxygen demand (COD)) concentration is up to several ten thousand, contains that the emulsifying greasy dirt water chemical stability is good, intractability is big, pollutes extremely serious.
The existing method of handling this class sewage adopts " ceramic membrane ultrafitration+aerobic combined treatment process ", it is characterized in that earlier sewage temperature being remained on more than 60 ℃, then through oil slick and solid substance in the paper tape filter removal water, adopt the oil in water emulsion in the ceramic membrane filter treatment unit removal water again, aerobe is carried out in its water outlet handle.
Facts have proved that there is following shortcoming in existing ceramic membrane ultrafitration+aerobic treatment combined treatment process:
(1) investment is big, energy consumption is high.The ceramic membrane filter device costs an arm and a leg, and operation energy consumption is very big, about its ton water treatment power consumption is spent up to 15.
(2) the investment film is stopped up by greasy dirt easily, and the cleaning difficulty is big, work-ing life short.
(3) still contain high concentration of COD in the water behind the ceramic membrane filter, adopt aerobe to handle merely, can't make water quality after the processing reach the primary standard of GB8978-1996 defined at all.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, propose a kind of treatment process that contains the oil in water emulsion industrial sewage, can improve the stability and the efficient of sewage disposal, reduce total investment of engineering, and maintenance management is easy.
For realizing such purpose, sewage water treatment method provided by the invention, concrete flow process is: sewage → equalizing tank → rotary drum oil eliminator → coagulation device → air-floating apparatus → anaerobic processing device → aerobic treatment device → treating water.That is: the oil in water emulsion industrial sewage that contains that flows into equalizing tank is at first handled through the rotary drum oil eliminator, the water outlet of removing oil slick is more earlier after coagulation and air supporting processing, make the oil in water emulsion breakdown of emulsion and through oily water separation, sewage passes through anaerobic treatment and aerobic treatment again, organic concentration in the water is reduced, make treating water reach the primary standard of GB8978-1996 defined.
Method of the present invention specifically may further comprise the steps:
1, will contain the oil in water emulsion industrial sewage and introduce equalizing tank, the rotary drum oil eliminator will be set in the equalizing tank, and handle by the rotary drum oil eliminator oil slick of sewage is removed.
2, the water outlet introducing coagulation reaction device that will remove oil slick carries out coagulating treatment, adds the emulsion splitter of 100-1000mg/L in coagulation reaction device, makes the oil in water emulsion generation breakdown of emulsion reaction in the water; Hydraulic detention time in the coagulation reaction device is 10-30 minute; Described emulsion splitter be the calcium chloride solid phase prod of technical grade to add the concentration that clear water is mixed be the aqueous solution of 20-40%, emulsion splitter mixes with sewage by mechanical stirring in coagulation reaction device.
3, the water outlet of coagulation reaction device relies on gravity to flow into air-floating apparatus automatically, the polyacrylamide chemical that adds 2-10mg/L in the ingress of air-floating apparatus, the polyacrylamide chemical that is added is that volumetric concentration is the aqueous solution of 0.1-0.2%, this aqueous solution carries out hybrid concurrency with sewage and gives birth to reaction in air-floating apparatus, the elaioleucite behind the breakdown of emulsion is agglomerated into macrobead oil; The hydraulic detention time of air-floating apparatus is 20-40 minute, the bubble incorporation in macrobead oil and the air-floating apparatus and emerging, and then reach oily water separation.
4, from air-floating apparatus come out separate fuel-displaced sewage by water pump lifting in anaerobic processing device, in anaerobic processing device, utilize anaerobion that the organism in the water is decomposed, and produce and contain the gas of carbonic acid gas and methane, thereby the organic concentration in the water is reduced; Temperature in the anaerobic processing device is controlled in 30-38 ℃ the scope, and the COD concentration that flows into the water in the anaerobic processing device is 1000-8000mg/L, and hydraulic detention time is set at 12-42 hour.
5, the water outlet of anaerobic processing device relies on waterhead to flow in the aerobic treatment device, in aerobic treatment device, make good use of oxygen animalcule the organism that is not decomposed by anaerobion in the water is decomposed again, thereby the organic concentration in the water is reduced once more; Dissolved oxygen concentration is controlled in the scope of 4-6mg/L in the aerobic treatment device, and the COD concentration that flows into the water in the aerobic treatment device is 300-600mg/L, and hydraulic detention time is 12-36 hour; The water outlet of aerobic treatment device is the treating water that water quality reaches the primary standard of GB8978-1996 defined.
Among the present invention, described rotor drum oil-collecting device is an existing installation, is a kind of receipts oil equipment that swims on the equalizing tank liquid level and float with liquid level, can the oil slick in the equalizing tank be removed at water level arbitrarily, has advantage simple, working stability is set.The present invention adopts the oil removing of rotor drum oil-collecting device, has omitted traditional oil trap, can make system simplification, saves the space, and is stable, reduce investment and working cost, and the water ratio of the oil content of receiving is low.
The kind of described air-floating apparatus can adopt pressure air-dissolving formula, injecting dissolve gas formula and air-breathing aeration type, and its effect is that the gathering elaioleucite that will form behind the breakdown of emulsion is floating to the water surface, reaches the removal that separates with water.
It is formulated that emulsion splitter described in the present invention adds clear water by the calcium chloride solid phase prod of technical grade, can adjust the add-on of emulsion splitter according to the content of oil in water emulsion in the water.
Different with existing steel mill cold rolling oil-containing oil emulsion sewage treatment process, oil in water emulsion is to rely on efficient air-floating apparatus and remove in the sewage of the present invention.Therefore less investment, take up an area of economize, working cost is low, its water outlet is better than existing ceramic membrane filter technology.Anaerobic biological treatment is at first adopted in pneumatically supported water outlet, with the pre-treatment of anaerobic treatment as aerobic treatment, has thoroughly solved the existing problem of current technology.
Embodiment
Below by specific embodiment technical scheme of the present invention is described further.Following examples do not constitute limitation of the invention.
Embodiment 1:
Adopt method of the present invention to handle the emulsifying greasy dirt water that contains that certain cold rolling workshop section of steel mill discharged.
The emulsifying greasy dirt water that contains of 1, certain cold rolling workshop section of steel mill being discharged is introduced equalizing tank, and the rotary drum oil eliminator is set in the equalizing tank; Coming organism mean concns in the water is that the mean concns of 15000 (variation range 10000-20000) mg/LCODcr, oil is 8000 (variation range 5000-12000) mg/L, after the rotary drum oil eliminator was handled, the organism mean concns in the equalizing tank water outlet was that the mean concns of 6000 (variation range 5000-8000) mg/LCODcr, oil is 1000 (800-1500) mg/L.
2, the water outlet introducing coagulation reaction device that will remove oil slick carries out coagulating treatment, adds the emulsion splitter of 500mg/L in coagulation reaction device, makes the oil in water emulsion generation breakdown of emulsion reaction in the water; Hydraulic detention time in the coagulation reaction device is 20 minutes, the emulsion splitter that is added be the calcium chloride solid phase prod of technical grade to add concentration that clear water is mixed be 30% the aqueous solution, emulsion splitter mixes with sewage by mechanical stirring in coagulation reaction device.
3, the water outlet of coagulation reaction device relies on gravity to flow into air-floating apparatus automatically, the polyacrylamide chemical that adds 2mg/L in the ingress of air-floating apparatus, the polyacrylamide chemical that is added is that volumetric concentration is 0.1% the aqueous solution, this aqueous solution carries out hybrid concurrency with sewage and gives birth to reaction in air-floating apparatus, the elaioleucite behind the breakdown of emulsion is agglomerated into macrobead oil; The hydraulic detention time of air-floating apparatus is 30 minutes; Bubble incorporation in macrobead oil and the air-floating apparatus and emerging, and then reach oily water separation.After coagulation-air-floating apparatus processing, the organism mean concns is that the mean concns of 1500 (variation range 1000-2000) mg/LCODcr, oil is 20 (variation range 10-40) mg/L in the water outlet.
4, from air-floating apparatus come out separate fuel-displaced sewage by water pump lifting in anaerobic processing device, in anaerobic processing device, utilize anaerobion that the organism in the water is decomposed, and produce and contain the gas of carbonic acid gas and methane, thereby the organic concentration in the water is reduced; Temperature in the anaerobic processing device is controlled in 33-36 ℃ the scope, the COD mean concns that flows into the water in the anaerobic processing device is 1500mg/L, hydraulic detention time is set at 24 hours, and its outlet water organic substance mean concns is 300 (variation range 200-500) mg/LCODcr.
5, the water outlet of anaerobic processing device relies on waterhead to flow in the aerobic treatment device, in aerobic treatment device, make good use of oxygen animalcule the organism that is not decomposed by anaerobion in the water is decomposed again, thereby the organic concentration in the water is reduced once more; Dissolved oxygen concentration is controlled in the scope of 4-6mg/L in the aerobic treatment device, the COD mean concns that flows into the water in the aerobic treatment device is 300mg/L, hydraulic detention time is 15 hours, its outlet water organic substance mean concns is 80 (variation range 60-100) mg/LCODcr, reaches the primary standard of GB8978-1996 defined.
Embodiment 2:
Adopt method of the present invention to handle the emulsifying greasy dirt water that contains that certain motor car engine discharges.
The emulsifying greasy dirt water that contains of 1, certain motor car engine being discharged is introduced equalizing tank, and the rotary drum oil eliminator is set in the equalizing tank; Coming organism mean concns in the water is that the mean concns of 20000 (variation range 16000-21000) mg/LCODcr, oil is 6000 (variation range 4000-9000) mg/L, after the rotary drum oil eliminator was handled, the organism mean concns in the equalizing tank water outlet was that the mean concns of 12000 (variation range 7000-15000) mg/LCODcr, oil is 2000 (1500-2500) mg/L.
2, the water outlet introducing coagulation reaction device that will remove oil slick carries out coagulating treatment, adds the emulsion splitter of 800mg/L in coagulation reaction device, makes the oil in water emulsion generation breakdown of emulsion reaction in the water; Hydraulic detention time in the coagulation reaction device is 30 minutes, the emulsion splitter that is added be the calcium chloride solid phase prod of technical grade to add concentration that clear water is mixed be 30% the aqueous solution, emulsion splitter mixes with sewage by mechanical stirring in coagulation reaction device.
3, the water outlet of coagulation reaction device relies on gravity to flow into air-floating apparatus automatically, the polyacrylamide chemical that adds 4mg/L in the ingress of air-floating apparatus, the polyacrylamide chemical that is added is that volumetric concentration is 0.1% the aqueous solution, this aqueous solution carries out hybrid concurrency with sewage and gives birth to reaction in air-floating apparatus, the elaioleucite behind the breakdown of emulsion is agglomerated into macrobead oil; The hydraulic detention time of air-floating apparatus is 30 minutes; Bubble incorporation in macrobead oil and the air-floating apparatus and emerging, and then reach oily water separation.After coagulation-air-floating apparatus processing, the organism mean concns is that the mean concns of 6000 (variation range 4000-7000) mg/LCODcr, oil is 20 (variation range 10-30) mg/L in the water outlet.
4, from air-floating apparatus come out separate fuel-displaced sewage by water pump lifting in anaerobic processing device, in anaerobic processing device, utilize anaerobion that the organism in the water is decomposed, and produce and contain the gas of carbonic acid gas and methane, thereby the organic concentration in the water is reduced; Temperature in the anaerobic processing device is controlled in 36-38 ℃ the scope, the COD mean concns that flows into the water in the anaerobic processing device is 6000mg/L, hydraulic detention time is set at 36 hours, and its outlet water organic substance mean concns is 500 (variation range 300-600) mg/LCODcr.
5, the water outlet of anaerobic processing device relies on waterhead to flow in the aerobic treatment device, in aerobic treatment device, make good use of oxygen animalcule the organism that is not decomposed by anaerobion in the water is decomposed again, thereby the organic concentration in the water is reduced once more; Dissolved oxygen concentration is controlled in the scope of 4-6mg/L in the aerobic treatment device, the COD mean concns that flows into the water in the aerobic treatment device is 500mg/L, hydraulic detention time is 24 hours, its outlet water organic substance mean concns is 90 (variation range 60-100) mg/LCODcr, reaches the primary standard of GB8978-1996 defined.
Claims (1)
1, a kind of treatment process that contains the oil in water emulsion industrial sewage is characterized in that may further comprise the steps:
1) will contain the oil in water emulsion industrial sewage and introduce equalizing tank, the rotary drum oil eliminator will be set in the equalizing tank, and handle by the rotary drum oil eliminator oil slick of sewage is removed;
2) the water outlet introducing coagulation reaction device that will remove oil slick carries out coagulating treatment, adds the emulsion splitter of 100-1000mg/L in coagulation reaction device, makes the oil in water emulsion generation breakdown of emulsion reaction in the water; Hydraulic detention time in the coagulation reaction device is 10-30 minute; Described emulsion splitter be the calcium chloride solid phase prod of technical grade to add the concentration that clear water is mixed be the aqueous solution of 20-40%, emulsion splitter mixes with sewage by mechanical stirring in coagulation reaction device;
3) water outlet of coagulation reaction device relies on gravity to flow into air-floating apparatus automatically, the polyacrylamide chemical that adds 2-10mg/L in the ingress of air-floating apparatus, the polyacrylamide chemical that is added is that volumetric concentration is the aqueous solution of 0.1-0.2%, this aqueous solution carries out hybrid concurrency with sewage and gives birth to reaction in air-floating apparatus, the elaioleucite behind the breakdown of emulsion is agglomerated into macrobead oil; The hydraulic detention time of air-floating apparatus is 20-40 minute, the bubble incorporation in macrobead oil and the air-floating apparatus and emerging, and then reach oily water separation;
4) from air-floating apparatus come out separate fuel-displaced sewage by water pump lifting in anaerobic processing device, in anaerobic processing device, utilize anaerobion that the organism in the water is decomposed, and produce and contain the gas of carbonic acid gas and methane, thereby the organic concentration in the water is reduced; Temperature in the anaerobic processing device is controlled in 30-38 ℃ the scope, and the COD concentration that flows into the water in the anaerobic processing device is 1000-8000mg/L, and hydraulic detention time is set at 12-42 hour;
5) water outlet of anaerobic processing device relies on waterhead to flow in the aerobic treatment device, in aerobic treatment device, makes good use of oxygen animalcule the organism that is not decomposed by anaerobion in the water is decomposed again, thereby the organic concentration in the water is reduced once more; Dissolved oxygen concentration is controlled in the scope of 4-6mg/L in the aerobic treatment device, and the COD concentration that flows into the water in the aerobic treatment device is 300-600mg/L, and hydraulic detention time is 12-36 hour; The water outlet of aerobic treatment device is the treating water that water quality reaches the primary standard of GB8978-1996 defined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100470538A CN101492228A (en) | 2009-03-05 | 2009-03-05 | Treating method for industrial sewage containing roily oil |
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| CNA2009100470538A CN101492228A (en) | 2009-03-05 | 2009-03-05 | Treating method for industrial sewage containing roily oil |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583912A (en) * | 2012-03-30 | 2012-07-18 | 陈宏� | Technology and system for treating roasted eel industrial sewage |
| CN102887596A (en) * | 2011-12-20 | 2013-01-23 | 辽宁华孚环境工程有限公司 | Method and device for treating oil-containing emulsified wastewater or waste emulsion |
| CN103359888A (en) * | 2013-08-02 | 2013-10-23 | 江苏和顺环保股份有限公司 | Technology for treating organic solvent waste water and organic solvent-containing waste water |
| CN103395932A (en) * | 2013-08-02 | 2013-11-20 | 江苏和顺环保股份有限公司 | Processing apparatus for waste emulsified liquid and machining wastewater |
| CN103395931A (en) * | 2013-08-02 | 2013-11-20 | 江苏和顺环保股份有限公司 | Processing technology for waste emulsified liquid and machining wastewater |
| CN103570181A (en) * | 2012-07-23 | 2014-02-12 | 陕西德融新能源股份有限公司 | Treatment technology of oily sewage of biodiesel factories |
| CN104926025A (en) * | 2015-05-26 | 2015-09-23 | 成都高普石油工程技术有限公司 | Treatment technique of chemical wastewater in petroleum refining process |
| CN105293827A (en) * | 2015-11-05 | 2016-02-03 | 前海天乙投资管理（深圳）有限公司 | High emulsified oily wastewater treatment method and high emulsified oily wastewater treatment system |
| CN108249699A (en) * | 2018-01-19 | 2018-07-06 | 云南新联环境科技有限公司 | A kind of processing method of machine-building paint line industrial wastewater |
| CN109574389A (en) * | 2018-12-17 | 2019-04-05 | 佛山市诚德新材料有限公司 | A kind of recovery method of oil-containing stainless steel waste water |
| CN110104881A (en) * | 2019-05-10 | 2019-08-09 | 武汉碧清环保技术有限责任公司 | A kind of hot rolling oily wastewater materialization and biochemical processing process |
| CN110228871A (en) * | 2019-07-15 | 2019-09-13 | 新锦龙生物基材料（湖北）有限公司 | A kind of method and device of the quick water-oil separating containing miscellaneous oil emulsion containing soap |
| CN111732265A (en) * | 2020-08-04 | 2020-10-02 | 苏州淡林环境科技有限公司 | Nylon ATY oil agent wastewater treatment device |
| CN113501624A (en) * | 2021-07-28 | 2021-10-15 | 重庆鑫盾机电(集团)有限公司 | Treatment process of emulsion-containing wastewater |
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2009
- 2009-03-05 CN CNA2009100470538A patent/CN101492228A/en active Pending
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| CN102887596A (en) * | 2011-12-20 | 2013-01-23 | 辽宁华孚环境工程有限公司 | Method and device for treating oil-containing emulsified wastewater or waste emulsion |
| CN102887596B (en) * | 2011-12-20 | 2014-03-12 | 辽宁华孚环境工程股份有限公司 | Method and device for treating oil-containing emulsified wastewater or waste emulsion |
| CN102583912A (en) * | 2012-03-30 | 2012-07-18 | 陈宏� | Technology and system for treating roasted eel industrial sewage |
| CN102583912B (en) * | 2012-03-30 | 2013-08-28 | 陈宏� | Technology and system for treating roasted eel industrial sewage |
| CN103570181A (en) * | 2012-07-23 | 2014-02-12 | 陕西德融新能源股份有限公司 | Treatment technology of oily sewage of biodiesel factories |
| CN103359888A (en) * | 2013-08-02 | 2013-10-23 | 江苏和顺环保股份有限公司 | Technology for treating organic solvent waste water and organic solvent-containing waste water |
| CN103395932A (en) * | 2013-08-02 | 2013-11-20 | 江苏和顺环保股份有限公司 | Processing apparatus for waste emulsified liquid and machining wastewater |
| CN103395931A (en) * | 2013-08-02 | 2013-11-20 | 江苏和顺环保股份有限公司 | Processing technology for waste emulsified liquid and machining wastewater |
| CN104926025A (en) * | 2015-05-26 | 2015-09-23 | 成都高普石油工程技术有限公司 | Treatment technique of chemical wastewater in petroleum refining process |
| CN105293827A (en) * | 2015-11-05 | 2016-02-03 | 前海天乙投资管理（深圳）有限公司 | High emulsified oily wastewater treatment method and high emulsified oily wastewater treatment system |
| CN108249699A (en) * | 2018-01-19 | 2018-07-06 | 云南新联环境科技有限公司 | A kind of processing method of machine-building paint line industrial wastewater |
| CN109574389A (en) * | 2018-12-17 | 2019-04-05 | 佛山市诚德新材料有限公司 | A kind of recovery method of oil-containing stainless steel waste water |
| CN110104881A (en) * | 2019-05-10 | 2019-08-09 | 武汉碧清环保技术有限责任公司 | A kind of hot rolling oily wastewater materialization and biochemical processing process |
| CN110228871A (en) * | 2019-07-15 | 2019-09-13 | 新锦龙生物基材料（湖北）有限公司 | A kind of method and device of the quick water-oil separating containing miscellaneous oil emulsion containing soap |
| CN111732265A (en) * | 2020-08-04 | 2020-10-02 | 苏州淡林环境科技有限公司 | Nylon ATY oil agent wastewater treatment device |
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