CN103896448A - Novel process of rock debris wastewater treatment - Google Patents

Novel process of rock debris wastewater treatment Download PDF

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Publication number
CN103896448A
CN103896448A CN201210590029.0A CN201210590029A CN103896448A CN 103896448 A CN103896448 A CN 103896448A CN 201210590029 A CN201210590029 A CN 201210590029A CN 103896448 A CN103896448 A CN 103896448A
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Prior art keywords
treatment
water
treatment unit
unit
waste water
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CN201210590029.0A
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Chinese (zh)
Inventor
杨大为
杨阳
李卓坪
陈娟
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TIANJIN QING'AN SPECIAL EQUIPMENT RESEARCH AND DEVELOPMENT Co Ltd
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TIANJIN QING'AN SPECIAL EQUIPMENT RESEARCH AND DEVELOPMENT Co Ltd
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Priority to CN201210590029.0A priority Critical patent/CN103896448A/en
Publication of CN103896448A publication Critical patent/CN103896448A/en
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Abstract

The invention provides a novel process of rock debris wastewater treatment. The process comprises a pretreatment unit, a physicochemical treatment unit, a biochemical treatment unit and a deep treatment unit, and is characterized in that the pretreatment unit is formed by a water collecting tank, three-stage oil insulation and heating demulsification parts; the physiochemical treatment unit is formed by coagulation, air flotation and ultrafiltration; the biochemical treatment unit is formed by hydrolytic acidification and aerobiotic treatment; the deep treatment unit is formed by Fenton oxidation and resin adsorption. The novel process can be used for high oil content and high pollution load boring rock debris wastewater treatment, the treated water can achieve A-level standard of domestic sewage comprehensive emission and can be used as green water and water reuse, so that the treatment rate of boring rock debris wastewater can be improved, and the situation of sewage drainage in the oil production process can be solved.

Description

A kind of novel process of landwaste wastewater treatment
Technical field
The present invention relates to provide a kind of novel process of a kind of sewage disposal technology, particularly oilfield sewage and landwaste wastewater treatment.
Background technology
Flourish along with petroleum industry, oil, gas production aggravation, environment has been caused to very large pressure, particularly in drilling process the underground leakage of well drilling detritus waste water and outside row underground water and surface water are produced to severe contamination, ecology is around caused to detrimentally affect, and therefore well drilling detritus contaminated wastewater is administered becomes in current oilfield drilling cleaner production an arduousness and urgent task.Well drilling detritus waste water is mainly from drilling process, borehole operation process and oil recovery gas production process, and the water quality of well-drilling waste water is with the difference of drilling well well depth, geologic condition and widely different, and feature mainly comprises following several respects:
1. well-drilling waste water high dispersing, water quality and quantity changes greatly;
2. water-quality constituents complexity, mainly comprises drilling cuttings, oil, chemical additive, inorganic salts and heavy metal;
3. the object height that suspends, contains a large amount of suspended matters such as landwaste, oils, and is difficult for coagulation in landwaste waste water;
4. salinity is high, and owing to being offshore platform operation, wash-down water mostly is seawater, and in waste water, saltiness is high;
5. ambient pollution burden is high.Landwaste chroma in waste water is more than 800-1000 times, and outward appearance is chocolate; Oil-contg is in 0.5-1.0 × 10 5mg/L; COD is more than 15000mg/L.
The well drilling detritus waste water treatment process of application is a lot of at present, but single processing unit can not solve the processing problem of well drilling detritus waste water, only has the qualified discharge that can realize well-drilling waste water by combination process processing.But well-drilling waste water water quality and quantity changes greatly, water-quality constituents is complicated, generally need to develop separately corresponding combined treatment process for the concrete water quality of well drilling detritus waste water.The present invention is as starting point, and the novel treatment technique of design has universality to the landwaste waste water of all kinds of water quality, and waste water meets " integrated wastewater discharge standard " GB8978-1996 primary standard after treatment.
Summary of the invention
The present invention is directed to landwaste wastewater treatment present situation and deficiency, a kind of novel process of landwaste wastewater treatment is provided, this technique has universality to different quality waste water, can be by well drilling detritus wastewater treatment high pollution load to meeting national sewage comprehensive discharge primary standard, can re-injection utilization to the sewage after the oilfield treatments of land sea, improve the utilization ratio of water resources.
A kind of novel process of landwaste wastewater treatment, comprise pre-treatment, materialization processing, biochemical treatment and four unit of advanced treatment, technical process is three grades of oil removal-heating demulsification type-coagulation air-float-ultrafiltration system-acidication-aerobic biochemical-Fenton oxidation-resin absorption, and the realization of its technological effect comprises the following steps:
(1) first the oil patch waste water from oilfield exploitation is introduced to the water collecting basin regulating water quality water yield, what then make that described landwaste waste water homogeneous all measures passes through two-stage parallel flow intercepter (API) and one-level corrugated plate dst oil trap (CPI) or oil-removing purifier, the clearance of waste water oils is reached more than 85%, then add a certain amount of emulsion splitter and add thermal wastewater to 60 DEG C and carry out breakdown of emulsion and leave standstill, further improve the clearance of oils;
(2) water outlet of step (1) is introduced to coagulative precipitation tank, add respectively the coagulating agent of 0.6g/L PAC and 1mL/L PAM (2 ‰), and priority is quick and the each 3min of low rate mixing, leave standstill 30min, then wastewater supernatant fluid enters into air-dissolving air-float, controls air supporting pressure at 3kkg/cm 2, air supporting time 15min, water outlet enters tubular membrane ultrafiltration system again, and red-tape operati pressure 0.25MPa can make the oil-contg of waste water and the clearance of SS all reach 90%, and BOD, COD are all had to certain removal effect;
(3) adopt the active sludge that mud is municipal treatment plant, the water outlet that utilizes step (2) is that carbon source is carried out microbial acclimation, breeding, turn out respectively the acidication bacterium and the aerobic bacteria that are applicable to materialization unit effluent quality, improve the treatment effect of whole biochemical unit;
(4) make the water outlet of step (2) enter into biochemical treatment unit, the acidication bacterium and the aerobic bacteria bacterium colony that utilize step (3) to cultivate add, the most optimal retention time of Hydrolysis Acidification is 8-10h, be up to 0.5 through the biochemical oxygen demand (BOD) of acidication processed waste water and the ratio of chemical oxygen demand (COD), biodegradability increases substantially, Aerobic aeration rate can be controlled in 10L/h, 30 DEG C of temperature, HRT12h, and waste water BOD, COD are had to good removal effect;
(5) water outlet of step (4) enters into advanced treatment unit again, first carries out Fenton oxidation, removes in water still residual bio-refractory organism, H 2o 2and FeSO 47H 2the suitable dosage of O is respectively 8.2mL/L, 13.6g/L, i.e. H 2o 2/ Fe 2+mol ratio 2: 1, its consumption is liquor capacity and the ratio 1% of sewage volume, reaction is exposed under daylight reacts, the reaction times can be controlled in 3h, can further remove COD and ammonia nitrogen in sewage; Resin absorption adopts coarse cleaner, and water outlet oleaginousness, ammonia nitrogen are all less than 5mg/L;
(6) water constituent complexity, the high landwaste waste water of ambient pollution burden, adopt this technique to process continuously, and effluent quality can meet national sewage comprehensive discharge primary standard;
Effluent quality after processing: oils < 2mg/L, COD < 40mg/L, BOD5 < 10mg/L, SS < 10mg/L, ammonia nitrogen < 5mg/L, 20 times of colourity <, water white transparency.
The present invention is directed to feature and the deficiency of existing landwaste wastewater processing technology, design and develop out a set of novel combined type landwaste waste water treatment process, this technique can, by the well drilling detritus wastewater treatment of the high COD of high oil-containing high salinity to qualified discharge, have been carried out pilot plant test, treatment capacity 5m at present 3/ d, effluent quality reached sewage comprehensive discharge primary standard.This technology not only can reclaim substantial oil, improve water utilization rate, fundamentally solves and adopts the pollution problem of well-drilling waste water to environment.Technology can be used in oil field waste and other extremely unmanageable oily(waste)water processing of the oil recovery of Hai Lu.Because suspension content in well-drilling waste water is very high, COD value is very large, in treating processes, can produce a large amount of mud, mud is cured disposal after dehydration together with discarded slurry, can further do the non-burning brick comprehensive utilization of Denging.
Brief description of the drawings
Fig. 1 is landwaste wastewater treatment novel process schema of the present invention.
Embodiment
After now the specific embodiment of landwaste wastewater treatment novel process being described in.Following examples are illustrative, are not determinate, can not this limit protection scope of the present invention.
Below in conjunction with figure and embodiment explanation the present invention.
Landwaste wastewater treatment novel process of the present invention, for the high water quality characteristic containing the high turbidity colourity of innage COD of landwaste waste water, utilize pretreatment unit to reclaim and remove a large amount of oils in waste water, most COD, SS and ammonia nitrogen are removed in materialization unit, and further remove oils, biochemical treatment unit relies on the Decomposition of microorganism to remove BOD, COD and ammonia nitrogen, and advanced treatment unit is the further processing to requiring higher effluent quality.
As shown in Figure 1, landwaste wastewater treatment novel process of the present invention comprises four unit, and embodiment comprises the following steps:
1, pretreatment unit
Pretreatment unit comprises water collecting basin, three grades of oil removals and heating demulsification type technique.
(1) water collecting basin
Water collecting basin can design square and circular, is mainly the oil patch waste water in oilfield exploitation is introduced to the water collecting basin regulating water quality water yield, is convenient to the processing of subsequent technique.
(2) three grades of oil removals
Respectively there is technique all to select parallel flow intercepter, what make that described landwaste waste water homogeneous all measures passes through secondary parallel flow intercepter (API) and one-level corrugated plate dst oil trap (CPI) or oil-removing purifier (saving floor occupying area), and the clearance of waste water oils is reached more than 85%.
(3) heating demulsification type
Demulsification technology can be designed to horizontal sedimentation tank, top is provided with frizing and scrapes husky machine, in pond, add a certain amount of emulsion splitter (as sulfuric acid), and add thermal wastewater to 60 DEG C, make oil in water emulsion become suspension oil, remove most of oil in water emulsion and suspended substance in waste water, further improve the clearance of oils, alleviate the oil removing load of subsequent technique.
2, physicochemical treatment unit
Physicochemical treatment unit comprises coagulation, air supporting and ultrafiltration technology.
(1) coagulation
In coagulative precipitation tank, add respectively the coagulating agent of 0.6g/L PAC and 1mL/L PAM (2 ‰), be provided with the stirring system of automatic control, successively quick the and each 3min of low rate mixing, leaves standstill 30min, mainly removes waste water small particles suspended substance and organism.
(2) air supporting
The supernatant liquor of coagulation process enters into dissolved air flotation device, controls air supporting pressure at 3kkg/cm 2, air supporting time 15min, further removes SS and hardly degraded organic substance in waste water.
(3) ultrafiltration
The tubular membrane ultrafiltration system of selecting PVDF material, red-tape operati pressure 0.25MPa, can make the oil-contg of waste water and the clearance of SS all reach 90%, and BOD, COD are all had to certain removal effect.
3, biochemical treatment unit
Biochemical treatment unit comprises acidication and aerobic biochemical two portions.First need to adopt the active sludge of municipal treatment plant, the water outlet of materialization unit is that carbon source is carried out microbial acclimation, breeding, turns out respectively the acidication bacterium and the aerobic bacteria that are applicable to materialization unit effluent quality, improves the treatment effect of whole biochemical unit;
(1) acidication
The water outlet of materialization unit enters into biochemical treatment unit, adds the acidication bacterium of above-mentioned cultivation.Hydrolysis object in acidication-oxygen consumption biological treatment is mainly to change the non-solubility organism in original waste water into dissolved organic matter, improves the biodegradability of waste water, is beneficial to follow-up oxygen consumption processing.The most optimal retention time of Hydrolysis Acidification is 8-10h, is up to 0.5 through the biochemical oxygen demand (BOD) of acidication processed waste water and the ratio of chemical oxygen demand (COD), and biodegradability increases substantially.
(2) aerobic biochemical
The active sludge of aerobic biochemical process, is the cotton-shaped suede grain taking aerobic bacteria as biological bacterium colony main body, can carry out the organism in degrading waste water by adsorption and oxidation.Aerobic aeration rate can be controlled in 10L/h, 30 DEG C of temperature, HRT12h, and waste water BOD, COD are had to good removal effect.
4, advanced treatment unit
Advanced treatment unit comprises Fenton oxidation and resin absorption technique.Landwaste waste water water quality after bio-chemical effluent is not up to standard, needs to further process.
(1) Fenton oxidation
Biochemical water enters into advanced treatment unit again, carries out Fenton oxidation and be mainly removing in water still residual bio-refractory organism, H 2o 2and FeSO 47H 2the suitable dosage of O is respectively 8.2mL/L, 13.6g/L, i.e. H 2o 2/ Fe 2+mol ratio 2: 1, its consumption is liquor capacity and the ratio 1% of sewage volume, reaction is exposed under daylight reacts, the reaction times can be controlled in 3h, can further remove COD and ammonia nitrogen in sewage.
(2) resin absorption
What resin absorption adopted is coarse resin cleaner, can do further to remove to the oils in waste water, hardly degraded organic substance and ammonia nitrogen, guarantees to reach national sewage comprehensive discharge primary standard.
The present invention has good treatment effect to height containing the well drilling detritus waste water of the high COD of innage turbidity, and the processing that is simultaneously applicable to extra large land drilling well oilfield sewage and other difficult oily(waste)waters is reclaimed.If handled landwaste waste water quality contamination index is lower, some technique of materialization processing and advanced treatment unit can correspondingly be simplified, and can reach equally expection emission standard.Oils in process treatment process can be processed recovery, and sewage after treatment can re-injection reuse, and landwaste waste residue etc. can do the non-burning brick material of construction of Denging, has realized cleaner production and the utilization of waste material in oil recovery process.This invention applied range, industrial applications has a extensive future.
Process the water-quality guideline comparison of landwaste waste water front and back:
Water-quality guideline Oil-contg (mg/L) Colourity/doubly SS(mg/L) COD(mg/L) NH 3-N(mg/L)
Influent quality (5-20)×10 4 1000-2000 3600-6000 (1.8-3)×10 4 100-150
Effluent quality ≤2 ≤20 ≤10 ≤40 ≤5
Clearance/% 99.9 99 99.8 99.9 96.7

Claims (7)

1. the novel process of a landwaste wastewater treatment, comprise successively pre-treatment, materialization processing, biochemical treatment and four unit of advanced treatment, it is characterized in that: described pretreatment unit is made up of water collecting basin, three grades of oil removals and heating demulsification type three parts, described physicochemical treatment unit is made up of coagulation, air supporting and ultrafiltration three parts, described biochemical treatment unit is made up of acidication and aerobic treatment, and described advanced treatment unit is made up of Fenton oxidation and resin absorption.
2. according to claim 1, the oil removal of described pretreatment unit adopts two-stage parallel flow intercepter (API) and one-level corrugated plate dst oil trap (CPI) to combine use, or employing oil-removing purifier, the clearance of oils is reached more than 85%, and post-heating waste water to 60 DEG C carry out breakdown of emulsion leave standstill.
3. according to claim 1, the coagulation process of described physicochemical treatment unit, selects the dosage of coagulating agent PAC and PAM (2 ‰) to be respectively 0.6g/L and 1mL/L, can reach 60% to the clearance of waste water oleaginousness and colourity; Described ultra-filtration process, selection oil-proofness is good, the tubular ultrafiltration membrane module of easy to clean, and the clearance of oils and SS is reached more than 90%.
4. according to claim 1, acidication and the aerobic treatment of described biochemical treatment unit, can adopt AO technique, but the bacterial classification that adds need to screen and tame with materialization sewage after treatment, keeps the salt-tolerant trait of bacterial classification.
5. according to claim 1, the Fenton oxidising process of described advanced treatment unit, H 2o 2and FeSO 47H 2the suitable dosage of O is respectively 8.2mL/L, 13.69g/L, i.e. H 2o 2/ COD=2, H 2o 2/ Fe 2+=2: 1; The initial pH of technique is 4, and oxidization time is 3h, H 2o 2when being controlled at 1mL/min, drop rate can obtain higher COD clearance; Described resin absorption process, selects resin cleaner.
6. landwaste wastewater treatment novel process according to claim 1, can, according to the water quality situation of landwaste waste water, simplify some technological process of materialization processing and advanced treatment unit.
7. under landwaste waste water complicated component, the high condition of ambient pollution burden, adopt this technique to process continuously, effluent quality can meet national sewage comprehensive discharge primary standard;
Effluent quality after processing: oils < 2mg/L, COD < 40mg/L, BOD 5< 10mg/L, SS < 10mg/L, ammonia nitrogen < 5mg/L, 20 times of colourity <, water white transparency.
CN201210590029.0A 2012-12-26 2012-12-26 Novel process of rock debris wastewater treatment Pending CN103896448A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104724863A (en) * 2015-03-27 2015-06-24 达州军华环保科技有限公司 Novel efficient flocculating decolorization method
CN104773893A (en) * 2015-04-13 2015-07-15 达州军华环保科技有限公司 Gas production wastewater treatment process
CN104843905A (en) * 2015-05-25 2015-08-19 安徽新天环保科技有限公司 High-concentration cutting liquid sewage pretreatment equipment
CN105060573A (en) * 2015-09-16 2015-11-18 成都美富特膜科技有限公司 Gas-field wastewater treatment technology based on special membrane
CN105693015A (en) * 2016-01-27 2016-06-22 山东省环保产业股份有限公司 Treatment method of cutting fluid wastewater of automobile engine
CN106277573A (en) * 2016-08-11 2017-01-04 上海洗霸科技股份有限公司 Processing method containing aluminum emulsified waste liquid
CN106746112A (en) * 2016-12-09 2017-05-31 苏州纳贝通环境科技有限公司 A kind of processing method of oily waste water
CN106830562A (en) * 2017-03-23 2017-06-13 沈阳建筑大学 A kind of petrochemical industry wastewater treatment integrated technique system and method
CN107381850A (en) * 2017-08-03 2017-11-24 绍兴齐英膜科技有限公司 A kind of system and method for handling shale refinery(waste) water
CN110668637A (en) * 2019-09-18 2020-01-10 海绵城市投资有限公司 Pit and pond wastewater treatment method and device
CN113307596A (en) * 2021-06-28 2021-08-27 西南石油大学 Method for preparing baking-free brick from offshore drilling waste mud

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104724863A (en) * 2015-03-27 2015-06-24 达州军华环保科技有限公司 Novel efficient flocculating decolorization method
CN104773893A (en) * 2015-04-13 2015-07-15 达州军华环保科技有限公司 Gas production wastewater treatment process
CN104843905A (en) * 2015-05-25 2015-08-19 安徽新天环保科技有限公司 High-concentration cutting liquid sewage pretreatment equipment
CN104843905B (en) * 2015-05-25 2016-12-07 安徽新天环保科技有限公司 The pre-processing device of high concentration cutting fluid sewage
CN105060573B (en) * 2015-09-16 2017-05-31 成都美富特膜科技有限公司 Gas field wastewater handling process based on special membrane
CN105060573A (en) * 2015-09-16 2015-11-18 成都美富特膜科技有限公司 Gas-field wastewater treatment technology based on special membrane
CN105693015A (en) * 2016-01-27 2016-06-22 山东省环保产业股份有限公司 Treatment method of cutting fluid wastewater of automobile engine
CN106277573A (en) * 2016-08-11 2017-01-04 上海洗霸科技股份有限公司 Processing method containing aluminum emulsified waste liquid
CN106746112A (en) * 2016-12-09 2017-05-31 苏州纳贝通环境科技有限公司 A kind of processing method of oily waste water
CN106746112B (en) * 2016-12-09 2020-05-05 创智汇晶知识产权运营(苏州)有限公司吴中经济开发区分公司 Treatment method of oily wastewater
CN106830562A (en) * 2017-03-23 2017-06-13 沈阳建筑大学 A kind of petrochemical industry wastewater treatment integrated technique system and method
CN106830562B (en) * 2017-03-23 2020-05-19 海南博士通环境工程有限公司 Petrochemical industry industrial wastewater treatment integrated process system and method
CN107381850A (en) * 2017-08-03 2017-11-24 绍兴齐英膜科技有限公司 A kind of system and method for handling shale refinery(waste) water
CN110668637A (en) * 2019-09-18 2020-01-10 海绵城市投资有限公司 Pit and pond wastewater treatment method and device
CN113307596A (en) * 2021-06-28 2021-08-27 西南石油大学 Method for preparing baking-free brick from offshore drilling waste mud

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Application publication date: 20140702