CN103288306A - Process for treating heavy oil waste water - Google Patents
Process for treating heavy oil waste water Download PDFInfo
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- CN103288306A CN103288306A CN2013102710960A CN201310271096A CN103288306A CN 103288306 A CN103288306 A CN 103288306A CN 2013102710960 A CN2013102710960 A CN 2013102710960A CN 201310271096 A CN201310271096 A CN 201310271096A CN 103288306 A CN103288306 A CN 103288306A
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Abstract
The invention relates to a process for treating heavy oil waste water. The process comprises the following steps of: treating waste water containing heavy oil through an oil separator and a regulating pool to reduce the oil component and non-degradable pollutants in the waste water; and performing biotreatment on the treated waste water through a coagulation air floatation device, an oxidation pond and a biochemical pool and enabling the treated waste water to pass through a filter system. Compared with the prior art, the waste water containing heavy oil is treated in a combined manner, massive oil slick and non-degradable objects are removed in the oil separator and the regulating pool firstly; and the coagulation air floatation device, the oxidation pond and the biochemical pool or filter system are effectively combined, so that the coagulation air flotation and strong oxidative degradation functions can be utilized, the biotreatment of filter treatment can be strengthened, the problem that output of waste water is difficult to achieve the standard can be solved, and the aim of recycling can be achieved.
Description
Technical field
The present invention relates to waste water treatment process, especially relate to a kind of heavy oil waste water treatment process.
Background technology
The waste water that combustion machine heavy oil produces has high CODcr, high oil-containing, high toxicity, low B/C than characteristics, belongs to highly difficult trade effluent.At present, domestic this type of wastewater treatment method mainly adopts A/O and AA/O technology, and these technologies mainly adopt gravitational separation process, absorption method at oily substance, and the oily substance clearance only is 20-30%, treatment effect is not satisfactory, for follow-up biochemical treatment has brought great difficulty.Because biochemical system self capacity of resisting impact load is fragile, the limitation of traditional denitrification reaction mechanism, add the pressure that pretreatment stage brings, make that the water outlet CODcr of system degraded is incomplete, ammonia nitrogen transforms not thorough, handle the back water outlet and do not reach GB8978-1996 " integrated wastewater discharge standard " secondary standard, be that leading indicator is petroleum-type≤10mg/L, CODcr≤150mg/L, ammonia nitrogen≤25mg/L.
Some enterprise adopts the method that strengthens dilution heavy oil waste water, makes the systemic contamination substrate concentration decline to a great extent, and water outlet reaches first discharge standard, and namely leading indicator is petroleum-type≤10mg/L, CODcr≤100mg/L, ammonia nitrogen≤15mg/L.But a large amount of dilution waste water has increased the processing load at biochemical station, has increased energy consumption and the expense of sewage disposal virtually, makes enterprise bear huge economical load, has run counter to the principle of cleaner production.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of problem that had both solved wastewater effluent difficulty up to standard for the defective that overcomes above-mentioned prior art existence, has reached the heavy oil waste water treatment process of recycling again.
Purpose of the present invention can be achieved through the following technical solutions:
The heavy oil waste water treatment process may further comprise the steps:
(1) waste water that will contain heavy oil is handled through oil trap, equalizing tank successively, process oil trap and coagulation floatation are earlier with the heavy oil in the waste water, light oil, oil in water emulsion and most COD cr, color removal, carry out water quality and quantity through clean water basin again and regulate, utilize the acidication function to improve the biochemical of coming water.
(2) waste water after will handling makes the larger molecular organics of ring-type in the waste water, long-chain shape resolve into small organic molecule or degraded fully through oxidation pond again, reduce its toxicity and refractory organics, and then be that biochemistry pool carries out biochemical treatment or filtering system through coagulation and regenerative wastewater pond.Hang with fibrous bundle in the biochemistry pool as filler, utilize the most of organic and inorganic pollutant in the removal of microorganisms waste water in the pond, namely finish the processing to heavy oil waste water, the content of handling CODcr in the effluent quality of back is less than 100mg/L, the oleaginousness environmental emission standard less than 10mg/L.
Add the agent of Fupai compounding coagulation in the described air flotation pool.
Described inorganic coagulant comprises poly aluminium chloride, polyiron sulfate, poly-silicon aluminum chloride, polymeric aluminum sulfate silicate or ferric sulfate of polymerized silica.Organic coagulant aids comprises all kinds of polyacrylamides, dimethyl propylene ammonium chloride.
The concentration of Fupai compounding coagulation agent in air-floating apparatus of described adding is 100-140mg/L.
Scavenging solution in the described clean water basin is back in the dissolving through reflux pump, and stream is delivered in the air flotation pool and recycled then.
The content of CODcr is 1500～3000mg/L in the waste water of the heavy oil described in the step (1).
The bottom of the service sink described in the step (1) is provided with diving mixer, and the control pool inner water power residence time (HRT) is 8～9 hours, is used for improving oxidation susceptibility and the biochemical property of waste water.
PH in the oxidation pond described in the step (2) is 4～5.
The waste water that processing obtains also can pass through sludge thickener, filtering equipment and sand filter, activated carbon filtration equipment, smart filter equipment is handled.
Compared with prior art, the present invention is directed to the waste water that contains heavy oil and carry out combined treatment, in oil trap and clean water basin, improve the biochemical of waste water, then air flotation pool, oxidation pond and biochemistry pool are effectively made up, flocculation-air floating, oxidative degradation function have been utilized, strengthen biochemical treatment or filtration treatment, both solved the problem of wastewater effluent difficulty up to standard, reached the purpose of recycling again.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment.
Embodiment
The heavy oil waste water treatment process may further comprise the steps:
(1) content that will contain the waste water COD cr of heavy oil is 1500～3000mg/L, handle through oil trap, equalizing tank successively, process oil trap and coagulation floatation are earlier with the heavy oil in the waste water, light oil, oil in water emulsion and most COD cr, color removal, carry out water quality and quantity through clean water basin again and regulate, the oxidation susceptibility and the biochemical property that utilize the acidication function to improve to come water.Wherein, add the agent of Fupai compounding coagulation in air-floating apparatus, the concentration of Fupai compounding coagulation agent in air-floating apparatus of adding is 100-140mg/L.The inorganic coagulant that adopts in the present embodiment comprises poly aluminium chloride, polyiron sulfate, poly-silicon aluminum chloride, polymeric aluminum sulfate silicate or ferric sulfate of polymerized silica, and organic coagulant aids comprises polyacrylamide, dimethyl propylene ammonium chloride.Clear water liquid in the clean water basin is back in the dissolving through reflux pump, and stream is delivered in the air flotation pool and recycled then, and the bottom of clean water basin is provided with diving mixer, and the control pool inner water power residence time (HRT) is 8～9 hours, is used for improving the biochemical property of waste water.
(2) waste water after will handling passes through oxidation pond again, make the larger molecular organics of ring-type in the waste water, long-chain shape resolve into small organic molecule or degraded fully, reduce its toxicity and refractory organics, and then be that biochemistry pool carries out biochemical treatment or filtering system through coagulation and regenerative wastewater pond.Hang with fibrous bundle in the biochemistry pool as filler, pH is 4～5 in the oxidation pond, utilize the most of organic and inorganic pollutant in the removal of microorganisms waste water in the pond, namely finish the processing to heavy oil waste water, the content of handling CODcr in the effluent quality of back is less than 100mg/L, the oleaginousness environmental emission standard less than 10mg/L.In addition, handle that the waste water obtain also can pass through sludge thickener, filtering equipment and sand filter, activated carbon filtration equipment, smart filter equipment is handled.
The add-on of Fupai compounding coagulation agent is as shown in the table to the result of wastewater treatment.
The agent of table 1Fupai compounding coagulation adds dose to the influence for the treatment of effect
Claims (9)
1. the heavy oil waste water treatment process is characterized in that, this technology may further comprise the steps:
(1) waste water that will contain heavy oil is handled through oil trap, equalizing tank successively, process oil trap and Fupai compounding coagulation air flotation pool are earlier with the heavy oil in the waste water, light oil, oil in water emulsion and most COD cr, color removal, carry out water quality and quantity through clean water basin again and regulate, utilize the acidication function to improve follow-up treatment effect;
(2) waste water after will handling makes the larger molecular organics of ring-type in the waste water, long-chain shape resolve into small organic molecule or degraded fully through oxidation pond again, reduce its toxicity and refractory organics, and then be that biochemistry pool carries out biochemical treatment or filtering system through coagulation and regenerative wastewater pond, hang with fibrous bundle in the biochemistry pool as filler, utilize the most of organic and inorganic pollutant in the removal of microorganisms waste water in the pond, namely finish the processing to heavy oil waste water, the content of handling CODcr in the effluent quality of back is less than 100mg/L, the oleaginousness environmental emission standard less than 10mg/L.
2. heavy oil waste water treatment process according to claim 1 is characterized in that, can add the agent of Fupai compounding coagulation in the described equalizing tank.
3. heavy oil waste water treatment process according to claim 2, it is characterized in that, described inorganic coagulant comprises poly aluminium chloride, polyiron sulfate, poly-silicon aluminum chloride, polymeric aluminum sulfate silicate or ferric sulfate of polymerized silica, and organic coagulant aids comprises all kinds of polyacrylamides, dimethyl propylene ammonium chloride.
4. according to claim 2 or 3 described heavy oil waste water treatment process, it is characterized in that the concentration of Fupai compounding coagulation agent in air-floating apparatus of described adding is 100-140mg/L.
5. heavy oil waste water treatment process according to claim 1 is characterized in that, the clear water liquid in the described clean water basin is back in the dissolving through reflux pump, and stream is delivered in the air flotation pool and recycled then.
6. heavy oil waste water treatment process according to claim 1 is characterized in that, the content of CODcr is 1500～3000mg/L in the waste water of the heavy oil described in the step (1).
7. heavy oil waste water treatment process according to claim 1, it is characterized in that, the bottom of the clean water basin described in the step (1) is provided with diving mixer, and the control pool inner water power residence time (HRT) is 8～9 hours, is used for improving oxidation susceptibility and the biochemical property of waste water.
8. heavy oil waste water treatment process according to claim 1 is characterized in that, the pH in the oxidation pond described in the step (2) is 4～5.
9. heavy oil waste water treatment process according to claim 1 is characterized in that, handles the waste water obtain and can also pass through biochemical treatment, also can pass through sludge thickener, filtering equipment and sand filter, activated carbon filtration equipment, smart filter equipment is handled.
Priority Applications (1)
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| CN2013102710960A CN103288306A (en) | 2013-07-01 | 2013-07-01 | Process for treating heavy oil waste water |
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| CN2013102710960A CN103288306A (en) | 2013-07-01 | 2013-07-01 | Process for treating heavy oil waste water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277447A (en) * | 2016-08-26 | 2017-01-04 | 东莞市粤丰废水处理有限公司 | The processing method of hc effluent and process streamline |
| CN106277618A (en) * | 2016-08-31 | 2017-01-04 | 赵卫平 | A kind of deep treatment method of oily waste water |
| CN107176764A (en) * | 2017-07-07 | 2017-09-19 | 南京福昌环保有限公司 | A kind of method of wastewater treatment |
| CN109574418A (en) * | 2019-01-24 | 2019-04-05 | 河南省防伪保密印刷公司（河南省邮电印刷厂） | A kind of purification reuse method of printing wastewater |
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| CN102030442A (en) * | 2009-09-28 | 2011-04-27 | 中国石油天然气集团公司 | Discharge and standard reaching treatment method for thick oil sewage of oilfields |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277447A (en) * | 2016-08-26 | 2017-01-04 | 东莞市粤丰废水处理有限公司 | The processing method of hc effluent and process streamline |
| CN106277618A (en) * | 2016-08-31 | 2017-01-04 | 赵卫平 | A kind of deep treatment method of oily waste water |
| CN107176764A (en) * | 2017-07-07 | 2017-09-19 | 南京福昌环保有限公司 | A kind of method of wastewater treatment |
| CN109574418A (en) * | 2019-01-24 | 2019-04-05 | 河南省防伪保密印刷公司（河南省邮电印刷厂） | A kind of purification reuse method of printing wastewater |
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Application publication date: 20130911 |