CN102745867A - Biochemical treatment method of deep-well polymer-sulfonated category slurry well drilling waste water - Google Patents
Biochemical treatment method of deep-well polymer-sulfonated category slurry well drilling waste water Download PDFInfo
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- CN102745867A CN102745867A CN2012102522401A CN201210252240A CN102745867A CN 102745867 A CN102745867 A CN 102745867A CN 2012102522401 A CN2012102522401 A CN 2012102522401A CN 201210252240 A CN201210252240 A CN 201210252240A CN 102745867 A CN102745867 A CN 102745867A
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Abstract
The invention relates to a biochemical treatment method of deep-well polymer-sulfonated category slurry well drilling waste water. The biochemical treatment method particularly comprises the steps of (1) conducting coagulation treatment: pumping the well drilling waste water in a coagulation reactor, sequentially adding coagulant, coagulant aid lime milk and a flocculating agent in the coagulation reactor and conducting solid-liquid separation after reaction; (2) conducting biochemical pre-treatment: adjusting the waste water after coagulation treatment in the step (1) to be acidic, then pumping the water in a Fenton oxidation or microelectrolysis-Fenton oxidation reactor, adjusting the potential of hydrogen (pH) of the water after reaction treatment to be 9-10 and adding the flocculating agent for conducting flocculation and solid-liquid separation; and (3) conducting microbiological treatment: adjusting the water after the biochemical pre-treatment in the step (2) to be neutral, pumping the water in an oxygen deficit tank with mature acclimatized activated sludge, then pumping outlet water in a contact aerobic reactor with mature acclimatized activated sludge and microorganism bacterium agent and filtering outlet water after the biochemical reaction to reach discharge standards. The treatment process provided by the biochemical treatment method is simple and easy to operate, the cost is saved and the secondary pollution caused by the fact that a large quantity of water treatment medicaments are used can be reduced. After the well drilling waste water is treated by the biochemical treatment method, various water quality indexes can achieve 1-2 level standards of the integrated wastewater discharge standard GB8978-1996.
Description
Technical field:
The present invention relates to a kind of deep-well and gather sulphur class DWM method of wastewater treatment, belong to the oilfield drilling wastewater processing technology, specifically a kind of deep-well gathers the biochemical processing process of sulphur DWM waste water hardly degraded organic substance.
Background technology:
The oilfield drilling process can produce a large amount of well-drilling waste waters, and this type of waste water is owing to contain a large amount of poisonous and hazardous pollutents, so must carry out improvement up to standard to it after the finishing drilling.Processing about well-drilling waste water; Efforts at environmental protection person just begins to adopt coagulation/catalyzed oxidation combination technique to handle the end of the eighties in last century; Introduce adsorption technology at coagulation/catalyzed oxidation combination process on the basis nineties, solved the purifying treatment of general polymer mud and shallow well well-drilling waste water effectively.
In deep-well (more than the 3000m) the oil-gas exploration and development drilling process; The general employing gathered sulphur caving-preventing drilling fluid and high-temperature drilling liquid, in this type of drilling fluid system synthetic type of treatment agent kind of anti-salt temperature resistance many, form complicated, dosage is big, so suspension content is high in the waste water, the organic contamination substrate concentration is high and be difficult to flocculation and the removal of degrading; Adopt conventional chemical coagulation process can realize the removal of suspended substance and oils in the waste water; Colourity and organic part are removed, and adopt Fenton catalyzed oxidation technology again, and colourity and removal effect of organic matter are not obvious; Further carry out advanced treatment with absorption method again; Colourity can be removed, and still can't stablize and reaches " integrated wastewater discharge standard " 1-2 grade standard (GB8978-1996) but organic content is COD, and consumption of chemical agent is big, processing cost is high and be prone to cause secondary pollution.
The patent No. is that 200610144052.1 application discloses a kind of treatment process that is used for sewage of high well and deep drilling well; Adopted the treatment process that is the main body with coagulating sedimentation/stair oxidation/biological treatment/secondary oxidation/absorption (biological filter); And auxiliary with the advanced treatment process behind solid-liquid separation, acid-alkali accommodation and the secondary oxidation, this technology belongs to materialization and handles the treatment process that combines with mikrobe, and processing cost reduces relatively; But the tediously long complicacy of treatment step, execute-in-place are difficult.The processing up to standard that effluxes that gathers sulphur class DWM waste water to deep-well; Application number is that 201010209919.3 patent has proposed a kind of deep-well and gathers sulphur class DWM method of wastewater treatment; Main coagulation/secondary flocculation/absorption/the oxidation processing technique that adopts, this technology belongs to materilization freatment method.But this art breading well-drilling waste water effluent quality stably reaching standard, but the medicament dosage is bigger in treating processes, and regeneration of activated carbon is difficult, so cost for wastewater treatment is higher, and uses a large amount of chemical agents to be prone to cause secondary environmental pollution.
Summary of the invention:
The objective of the invention is to overcome the well-drilling waste water that prior art exists and handle the defective that back COD is difficult to stably reaching standard, the tediously long complicacy of art breading step and has secondary pollution, propose a kind of deep-well that is applicable to and gather the biochemical processing process of sulphur class DWM waste water hardly degraded organic substance.
The present invention comprises following steps:
(1) coagulating treatment: well-drilling waste water is pumped into coagulation reactor, add aluminum sulfate coagulant, coagulant aids milk of lime and flocculation agent successively, carry out solid-liquid separation after the reaction.
Described aluminum sulfate coagulant, dosage are 15-80kg/m
3
Described flocculation agent is a SEPIGEL 305.
(2) biochemical pre-treatment: will be adjusted to acidity with acid through the waste water after the step ⑴ coagulating treatment; Again water is pumped into Fenton oxidation or little electrolysis-Fenton oxidation reactor; Water after the reaction treatment is regulated pH=9-10 with coagulant aids, and the adding flocculation agent flocculates, solid-liquid separation.
Described Fenton oxidation, operational condition is: pH is 2 ~ 4, H
2O
2Add-on is 1 ~ 5 times of water inlet COD concentration, H
2O
2With the ferrous sulfate mol ratio be 4 ~ 20 times, the reaction times is 2 ~ 4h.
Described little electrolysis-Fenton oxidation reactor, operational condition is: micro-electrolysis reaction pH is 2-4, iron filings are 6 ~ 1 with the quality of activated carbon ratio; H in little electrolysis water outlet
2O
2, add-on is 1 ~ 3 times of water inlet COD concentration, H
2O
2With the ferrous sulfate mol ratio be 15 ~ 30 times, oxidization time is 2 ~ 4h.
(3) microbiological treatment: will transfer to neutrality with acid through the biochemical pretreated water of step ⑵; And water pumped into the sophisticated anoxic reacter of activated sludge acclimatization; Again water outlet is pumped into complex microbial inoculum and tame sophisticated contact aerobic reactor, the reaction after-filtration gets final product qualified discharge.
Described anaerobic treatment, its operational condition is: add the active sludge of general municipal sewage plant, dosage is 4 ~ 10g/L, after domestication, reaction 8 ~ 10h.
Described contact aerobic reaction is handled, and its operational condition is: add active sludge and the microbial inoculum BS compound microbiobacterial agent that contains genus bacillus, Saccharomycodes and zymin, the active sludge dosage is 3 ~ 8g/L; Microbial inoculum BS dosage is 0.3-1.0g/L; After the complex microbial inoculum process domestication maturation, aerobic reaction 10 ~ 24h.
A kind of deep-well that is applicable to provided by the invention gathers the biochemical processing process of sulphur class DWM waste water; Having overcome the deep-well of materialization technical finesse in the past, to gather sulphur DWM waste water dosing big, and processing cost is high, is prone to cause the defective of secondary pollution; The novel process that a kind of materialization combines with the microbiological treatment technology has been proposed; Water quality after the processing reaches " integrated wastewater discharge standard " 1-2 grade standard (GB8978-1996), compares with traditional technology, and operating process is simple; Reduce the medicament usage quantity, practiced thrift running cost again.
Embodiment:
Embodiment 1
That gets Zhongyuan Oil Field well (well depth 3808m) gathers sulphur DWM waste water 10m
3, stir adding aluminum sulfate coagulant 150kg down, after mixing, add milk of lime and regulate wastewater pH to neutral, stirring adds polyacrylamide solution down at a slow speed, carries out solid-liquid separation then; Water after the separation transfers to pH=4 with sulfuric acid, adds H
2O
2Solution 20kg, ferrous sulfate 9kg behind the controlling reaction time 2h, regulate pH=9.0 with milk of lime under stirring, and stir at a slow speed to add polyacrylamide solution down, carry out solid-liquid separation then; (active mud content is 4kg/m to filtered water with the sophisticated hypoxia response of sulphuric acid soln furnishing neutral entering sludge acclimatization pond
3), the residence time is 10h; (sludge quantity is 3kg/m again supernatant to be pumped into complex microbial inoculum domestication maturation
3, microbial inoculum BS dosage is 0.3kg/m
3) the contact aerobic reactor, reaction time is 10h; Water outlet is filtered, and the result of purifying waste water is seen table instance 1.
Embodiment 2
That gets gas field, northeast, river well (well depth 5392m) gathers sulphur DWM waste water 10m
3, stir adding aluminum sulfate coagulant 550kg down, after mixing, add milk of lime and regulate wastewater pH to neutral, stirring adds polyacrylamide solution down at a slow speed, carries out solid-liquid separation then; Treating water after the separation transfers to pH=2 with sulfuric acid, adds H
2O
2Solution 125kg, ferrous sulfate 225kg stir down and regulate pH=9.0 with milk of lime behind the controlling reaction time 4h, stir at a slow speed down to add polyacrylamide solution, carry out solid-liquid separation then; (active mud content is 10kg/m to filtered water with the sophisticated hypoxia response of sulphuric acid soln furnishing neutral entering sludge acclimatization pond
3), the biochemical reaction residence time is 8h; (the active sludge dosage is 8kg/m again supernatant to be pumped into complex microbial inoculum domestication maturation
3, microbial inoculum BS dosage is 0.5kg/m
3) the contact aerobic reactor, reaction time is 12h; Water outlet is filtered, and the result of purifying waste water is seen instance 2 in the table table.
Embodiment 3
That gets gas field, northeast, river well (well depth 7120m) gathers sulphur DWM waste water 10m
3, stir adding aluminum sulfate coagulant 600kg down, after mixing, add milk of lime and regulate wastewater pH to neutral, stirring adds polyacrylamide solution down at a slow speed, carries out solid-liquid separation then; Separate pumping in the micro-electrolysis reactor after water outlet transfers to pH=4 with sulfuric acid, add H
2O
2Solution 20kg, ferrous sulfate 11kg carry out oxidizing reaction, stir down and regulate pH=10 with milk of lime behind the controlling reaction time 4h, stir at a slow speed down to add polyacrylamide solution, carry out solid-liquid separation then; (active mud content is 6kg/m to filtered water with the sophisticated hypoxia response of sulphuric acid soln furnishing neutral entering sludge acclimatization pond
3), reaction time is 9h; (the active sludge dosage is 6kg/m again supernatant to be pumped into complex microbial inoculum domestication maturation
3, microbial inoculum BS dosage is 0.8kg/m
3) the contact aerobic reactor, reaction time is 18h; Water outlet is filtered, and the result of purifying waste water is seen instance 3 in the table table.
Embodiment 4
That gets gas field, northeast, river well (well depth 6250m) gathers sulphur DWM waste water 10m
3, stir adding aluminum sulfate coagulant 800kg down, after mixing, add milk of lime and regulate wastewater pH to neutral, stirring adds polyacrylamide solution down at a slow speed, carries out solid-liquid separation then; Isolating water outlet pumps in the micro-electrolysis reactor after transferring to pH=2 with sulfuric acid, adds H
2O
2Solution 150kg, ferrous sulfate 41kg carry out oxidizing reaction 2h, regulate pH=10 with milk of lime, stir at a slow speed down to add polyacrylamide solution, carry out solid-liquid separation then; (active mud content is 10kg/m to filtered water with the sophisticated anoxic reacter of sulphuric acid soln furnishing neutral entering sludge acclimatization
3), reaction time is 10h; (the active sludge dosage is 8kg/m again supernatant to be pumped into complex microbial inoculum domestication maturation
3, microbial inoculum BS dosage is 1.0kg/m
3) the contact aerobic reactor, reaction time is 24h, water outlet is filtered, the result of purifying waste water is seen instance 4 in the table table.
The table deep-well gathers sulphur DWM wastewater treatment test result
Visible by table 1, gather sulphur class DWM waste water after coagulation-biochemical pre-treatment-mikrobe recombining process is handled, its main COD of contamination index, suspended substance, heavy metal, petroleum-type and sulfide all reach the 1-2 grade standard of " integrated wastewater discharge standard ".
Claims (6)
1. a deep-well gathers sulphur class DWM biochemical procss for treating waste water, and having adopted pre-treatment/microbiological treatment is main biochemistry combination process, it is characterized in that comprising following steps:
⑴ coagulating treatment: well-drilling waste water is pumped into coagulation reactor, add Tai-Ace S 150, coagulant aids milk of lime and SEPIGEL 305 successively, carry out solid-liquid separation after the reaction;
⑵ biochemical pre-treatment: will be adjusted to acidity with acid through the waste water after step ⑴ coagulation-solid-liquid separation is handled; Again water is pumped in Fenton oxidation or the little electrolysis-Fenton oxidation reactor; Reacted water is regulated pH=9-10 with coagulant aids, and the adding SEPIGEL 305 flocculates, solid-liquid separation;
⑶ microbiological treatment: will be adjusted to neutrality with acid through the biochemical pretreated water of step ⑵; And water pumped into the sophisticated anoxic reacter of activated sludge acclimatization; Water outlet is pumped into complex microbial inoculum again and tame sophisticated contact aerobic reactor, the reaction after-filtration gets final product qualified discharge.
2. a kind of deep-well according to claim 1 gathers sulphur class DWM method of wastewater treatment, it is characterized in that: described Tai-Ace S 150 dosage is 15-80kg/m
3
3. a kind of deep-well according to claim 1 gathers sulphur class DWM method of wastewater treatment, it is characterized in that: described Fenton oxidation, operational condition is: pH is 2 ~ 4, H
2O
2Add-on is 1 ~ 5 times of water inlet COD concentration, H
2O
2With the ferrous sulfate mol ratio be 4 ~ 20 times, the reaction times is 2 ~ 4h.
4. a kind of deep-well according to claim 1 gathers sulphur class DWM method of wastewater treatment, it is characterized in that: described little electrolysis-Fenton oxidation reactor, and operational condition is: micro-electrolysis reaction pH is 2-4, iron filings are 6-1 with the quality of activated carbon ratio; H in little electrolysis water outlet
2O
2Dosage is 1-3 times of water inlet COD concentration, H
2O
2With the ferrous sulfate mol ratio be 15-30 doubly, oxidization time is 2-4h.
5. a kind of deep-well according to claim 1 gathers sulphur class DWM biochemical procss for treating waste water, and it is characterized in that: the operational condition of described anoxic reacter is: the dosage of active sludge is 4 ~ 10g/L, and after domestication, hypoxia response carries out 8 ~ 10h.
6. a kind of deep-well according to claim 1 gathers sulphur class DWM biochemical procss for treating waste water; It is characterized in that: described contact aerobic reaction is handled; Its operational condition is: add the microbiobacterial agent that active sludge and the microbial inoculum BS that contains genus bacillus, Saccharomycodes and zymin are composited, the active sludge dosage is 3 ~ 8g/L; Microbiobacterial agent BS dosage is 0.3-1.0g/L; After the complex microbial inoculum process domestication maturation, aerobic reaction 10 ~ 24h.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693804A (en) * | 2013-11-29 | 2014-04-02 | 西安近代化学研究所 | Method for treating energetic material synthetic wastewater |
| CN105152464A (en) * | 2015-07-23 | 2015-12-16 | 江苏建亚树脂科技有限公司 | Wastewater treatment method |
| CN111423065A (en) * | 2020-04-17 | 2020-07-17 | 安徽川鼎水处理设备有限公司 | Micro-electrolysis Fenton treatment process for printing wastewater |
Citations (5)
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|---|---|---|---|---|
| US4482459A (en) * | 1983-04-27 | 1984-11-13 | Newpark Waste Treatment Systems Inc. | Continuous process for the reclamation of waste drilling fluids |
| CN101190822A (en) * | 2006-11-24 | 2008-06-04 | 中国科学院生态环境研究中心 | Technique for treating sewage of high well and deep drilling well |
| CN102161543A (en) * | 2010-07-27 | 2011-08-24 | 王兵 | Advanced treatment method for well drilling wastewater based on compound catalytic oxidation of ozone |
| CN102242077A (en) * | 2011-05-07 | 2011-11-16 | 刘志坤 | Super-microbial sludge culture accelerator |
| CN102295359A (en) * | 2010-06-25 | 2011-12-28 | 中国石油化工集团公司 | Treatment method for deep-well polysulfide slurry drilling waste water |
-
2012
- 2012-07-19 CN CN2012102522401A patent/CN102745867A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4482459A (en) * | 1983-04-27 | 1984-11-13 | Newpark Waste Treatment Systems Inc. | Continuous process for the reclamation of waste drilling fluids |
| CN101190822A (en) * | 2006-11-24 | 2008-06-04 | 中国科学院生态环境研究中心 | Technique for treating sewage of high well and deep drilling well |
| CN102295359A (en) * | 2010-06-25 | 2011-12-28 | 中国石油化工集团公司 | Treatment method for deep-well polysulfide slurry drilling waste water |
| CN102161543A (en) * | 2010-07-27 | 2011-08-24 | 王兵 | Advanced treatment method for well drilling wastewater based on compound catalytic oxidation of ozone |
| CN102242077A (en) * | 2011-05-07 | 2011-11-16 | 刘志坤 | Super-microbial sludge culture accelerator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693804A (en) * | 2013-11-29 | 2014-04-02 | 西安近代化学研究所 | Method for treating energetic material synthetic wastewater |
| CN103693804B (en) * | 2013-11-29 | 2016-01-20 | 西安近代化学研究所 | A kind for the treatment of process of energetic material synthetic wastewater |
| CN105152464A (en) * | 2015-07-23 | 2015-12-16 | 江苏建亚树脂科技有限公司 | Wastewater treatment method |
| CN111423065A (en) * | 2020-04-17 | 2020-07-17 | 安徽川鼎水处理设备有限公司 | Micro-electrolysis Fenton treatment process for printing wastewater |
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Application publication date: 20121024 |