CN1506328A - Sewage deeply treating process - Google Patents

Sewage deeply treating process Download PDF

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Publication number
CN1506328A
CN1506328A CNA02155207XA CN02155207A CN1506328A CN 1506328 A CN1506328 A CN 1506328A CN A02155207X A CNA02155207X A CN A02155207XA CN 02155207 A CN02155207 A CN 02155207A CN 1506328 A CN1506328 A CN 1506328A
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water
efficient
sewage
filler
reactor
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CN1208260C (en
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宁 李
李宁
梁玉文
崔童
赵国忠
杨世彬
刘德发
张树林
付强
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宁 李
李宁
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Abstract

The sewage deeply treating process for treating oil refining and chemical sewage after biochemical treatment includes treatment in efficient aeration bioreactor, adding flocculant to water, sand filtering, mixing with ozone active carbon treatment, filtering in efficient multiple medium filter, filtering in efficient composite filter, and filtering in microfilter successively. The advanced stable treating process has low cost, COD eliminating rate over 90 % and BOD5 eliminating rate over 95 %, and the treated water has COD less than 10 mg/L, suspension 20 mg/L, oil 1.0 mg/L and NH3-N 1.0 mg/L, reaches the standard for desalting water and meets the requirement of oil refining and chemical production.

Description

A kind of advanced treatment method for sewage water
Technical field
The present invention relates to sewage disposal technology, more particularly, is a kind of deep-purifying method of slight pollution waste water.
Background technology
Along with recovering the oil and the development of petroleum chemical industry in the oil field, the demand of water is constantly increased, the water cost constantly increases.According to country " 15 " water saving plan and requirement, recover the oil in the oil field and petroleum chemical industry reusing sewage rate requires to reach 50%, angle from Sustainable development, advance sewage recycling, greatly develop recycling sewage generated by making, make water supply and draining be integrated circulation, replenishing mutually with reasonable disposition is the important channel of solution shortage of water resources.
The comparatively ripe both at home and abroad at present and comparatively deep various waste water advanced treatment technology of research mainly contains following several form.
1. biochemical flow process (discipline tree orchid etc., " second environmental simulation controlled scientific seminar with pollution ", November 8 calendar year 2001)
The basic biochemical flow process of equalizing tank-coagulation air-float-sand filtration-acidication-bio-contact oxidation-sand filtration-activated carbon adsorption-disinfectant can realize requirement up to standard.But flow process is long, and investment and working cost are higher, and souring stage is not thorough, can not fully decompose macromole and other hardly degraded organic substance; Effluent quality relies on charcoal absorption to ensure, the cycle of operation is short, regeneration of activated carbon cost height, and work-ing life is short, and stable effluent quality is relatively poor, and be in operation scum silica frost and excess sludge produce.
2. membrane bioreactor (money is easy, " Shanghai environmental science ", on July 3rd, 1998)
Membrane bioreactor is a kind of new and effective reactor that arises at the historic moment along with the novel material the reach of science in recent years, is mainly used in the deep purifying of micro-organic polluting water.But facility investment cost height, treatment capacity is little, mould material clean and the regeneration problem on also be not well solved, the quality of homemade film is also still unstable, it is dirty stifled and fatal weakness such as can't clean to occur film when variation water quality or turbidity are high slightly.
3. ozone-BAC process (Wang Baozhen etc., " Environmental Pollution and Control ", April 10 calendar year 2001)
At the beginning of the seventies in last century, the ozone BAC process is brought into use in German Dusseldorf city Amstaad water factory first [3]At present, the ozone BAC process is to study the most deep a kind of sewerage advanced treatment process, has all formed the large-scale industrialization application apparatus at home and abroad.Operation test proves under the industrialized condition, utilizing the ozone oxidation characteristic that water quality is had improves and stabilization, utilize the gac specific surface area big, can effectively shorten the ripe cycle of microbial film domestication and improve biological degradation efficient, prolong gac work-ing life, and need not advantages such as regeneration, solved the economic technology problem that other technology pattern is difficult to overcome well, running cost is cheap, effluent quality is good, treatment effect is stable, has under stronger shock resistance and the impact condition soon characteristics such as quick-recovery biochemical function.
4. photocatalytic-oxidation metallization processes (Li Fangbai, " Shanghai environmental science " 20 days December calendar year 2001)
Last century, the mid-80 was carried out the research that the photochemical oxidation method is removed priority pollutant in the water both at home and abroad.Tongji University had carried out ultraviolet ray-ozone (UV-O in 1987 3) carry out the research of advanced treatment, meanwhile also having carried out the employing low pressure mercury lamp is light source, is the organic priority pollutant test of Treatment by Photocatalysis Oxidation of catalyzer with titanium dioxide, obtains certain effect.But these researchs also do not reach the stage that is applied to suitability for industrialized production at present; The expense costliness of photochemical catalytic oxidation in addition, clearance is low, and the energy consumption height is unfavorable for promoting.
The starting point of research and development photocatalytic-oxidation metallization processes just is used for colourity, suspended substance is handled the early stage such as waste water such as antibiotic, formaldehyde, methyl alcohol lower, that be difficult to biochemical treatment.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, propose a kind of making and handle the advanced treatment method for sewage water that back water quality can further satisfy higher quality of reused water requirement.
Sewage water treatment method of the present invention comprises following process:
(1) oil refining after biochemical treatment, chemical engineering sewage enter the high efficient aeration bio-reactor, and make filler in the sewage submergence reactor, its water outlet adds flocculation agent, behind thorough mixing, enter sand filter, described flocculation agent is aluminium iron polychloride and polyacrylamide, its add-on is respectively 20-50mg/l and 2-4mg/l, described oil refining, chemical engineering sewage COD≤120mg/l, NH 3-N≤20mg/l, suspended substance≤50mg/l;
(2) by the water outlet of step (1) sand filter with enter the biological activated carbon tower after ozone mixes, arrheaed 10-15 minute, described ozone amount is 5-10mg/l;
(3) water after the oxidation of step (2) biological activated carbon tower enters two placed in-line efficient more medium filters filtrations successively;
(4) water after step (3) is filtered enters efficient compound filter and filters, and water outlet reaches the circulating cooling make-up water standard;
(5) water after step (4) is filtered filters through Microfilter again, reaches de-salted water moisturizing standard.
The described high efficient aeration bio-reactor of step of the present invention (1) is in existing bio-aeration pool (Hou Xianglin chief editor, " Chinese oil Refining Technologies ", Sinopec press, December in 1991 the 1st edition, fill filler (aeration zone), the whole fillers of sewage submergence of oxygenation in P681).Described filler be spherical polypropylene skeleton and in inside filling-modified sponge (varicosity gathers amino ester), loadings is the 20-30% of reactor volume.Filler is through self-sow or inoculation back domestication biofilm and form, and sewage extensively contacts with microbial film, and under the effect of the metabolic function of microorganism on the microbial film, organic pollutant obtains removal in the sewage, and sewage is purified.
In addition, removing the organic while, also carry out the nitrification and denitrification effect of the degree of depth, thereby the system that guaranteed has the higher organic pollutant clearance of (comprising phosphorus, ammonia nitrogen).
Step of the present invention (1) is by adding the flocculation agent medicament in sewage, the electrostatic double layer of the pollutents such as colloidal solid in the water is compressed, loss of stability and form less little flocculation particle, after this particle that flocculates slightly bridging action mutually coalescent again or by other material forms big particle flco, by getting rid of in the water.(" water supply and drainage ", July calendar year 2001)
Described sand filtration (" Chinese wide knowledge of popular science ", on November 30th, 1999) is that suspended substance wherein, colloid and flco thereof etc. are trapped within filter material surface and the internal voids when making sewage pass through the filtrate bed.
The described ozone of step of the present invention (2)-biological activated carbon unit (" Chinese water supply and drainage ", 2002 the 3rd phases), it is the strong oxidation characteristic that utilizes ozone to have, can carry out decolouring, the oxygenolysis organism of water quality effectively, remove and to smell flavor, COD, washing composition, iron and manganese etc. in the water; Obviously improve the biodegradability of waste water, with the favourable condition (, the long-chain macromolecule organic being decomposed into the small organic molecule of readily biodegradable etc.) of creating follow-up biochemical treatment as the aromatics in the waste water is carried out the open chain effect.Experimental result shows, utilize the combination of ozone, biological activated carbon, can significantly improve the oxygenolysis efficient (chemical effect) of part hardly degraded organic substance, for the stable and high effective operation of biological activated carbon has been created good condition, the shock-resistance to stabilizing water quality, raising biological activated carbon has played crucial effects simultaneously.
It is known technology that biological activated carbon is handled, its dominant mechanism is to utilize gac as microbe carrier, utilizing its excellent absorption property to make organic substance in the slight pollution waste water carry out enrichment concentrates to reach the matrix condition that microbial metabolism is decomposed, by taming the microorganism system that forms naturally, realize the purification of water quality process that absorption-microbiological degradation is regenerated-adsorbed.Simultaneously, because the malconformation that charcoal layer waterpower distributes, can alternately form a lot of anaerobism or oxygen-starved area in biological activated carbon tower inside, thereby form specific anerobe, amphimicrobe and aerobic bacteria and deposit the microbial balance system, acidication effect by anaerobion, further improve the biodegradability of waste water, to improving processing efficiency, stablizing effluent quality and have vital role.
The described efficient compound more medium filter of step of the present invention (3) is to be made of different-grain diameter, filler of different nature, removes corresponding pollutent targetedly; Can set up Depth Filtration holds back system on the one hand, improve strainer integral filter performance, simultaneously, because filler also has effects such as oxidation catalyst filter, absorption, also have the bio-carrier characteristic,, can form the fairly obvious materialization of effect, biochemical treatment ability naturally along with the continuity of working time, can further remove residual organic matter, have great importance improving effluent quality and strengthening shock resistance.Its primary structure: strainer is cylindrical, and its inside is from bottom to top filled quartz sand, haydite, hard coal, active carbon filler successively, and their volume ratio is 1: 1: 1: 1, and their particle diameter is 0.5-2.0mm, and filler total fill able height is 800-1200mm.Its operation method: strainer top water inlet and by the bottom through the water outlet discharge filter.According to the loss of pressure head situation, backwash is carried out in operation more than 30 days, adopts air water backwash respectively, and backwash water and pressurized air are entered by bottom side spool mouth, are discharged by the top, and water backwash intensity is 1.0m 3/ m 2Min, gas backwash intensity is 3.0m 3/ m 2Min, backwash lasts 10-20min.
The described efficient compound filter of step of the present invention (4) is known device (" Zhejiang technological innovation ", on July 1st, 2002), and it is a membrane separation technique, is a kind of physical separating process, and it is that depended on pressure is that impellent is carried out filtering treatment technology.In recent years, because the development of mould material (the present invention's microfiltration membrane) and film manufacturing technology, the water treatment expert introduces membrane separation technique in the sewage disposal in a large number both at home and abroad, because improvement with the sewage treatment process combining method, the effluent quality that it can provide other water processing establishment never to reach, possess fabulous sanitary index, and treatment effect is extremely reliable and stable.
The described Microfilter of step of the present invention (5) is known device (Deng Yimin etc., " the ecological network of rivers ", on May 7th, 2002).It is a kind of filtering system of continous way, and it is made up of institutes such as microfiltration membrane post, pneupress system and back-purge system and PLC robot control system(RCS)s.
Method advantage of the present invention and effect:
This process design is scientific and reasonable and advanced technology is ripe, stable and reliable operation, and treatment system has stronger impact resistance; The every physical and chemical index of water outlet has met or exceeded design requirements fully, and wherein the COD clearance reaches more than 90%, and ton water running cost is 0.23 yuan/m 3
The COD clearance can be guaranteed to reach more than 95% after the industrialization, reaches circulating cooling make-up water ton water running cost and can be controlled in 0.55 yuan/m 3In.If supporting on-line monitoring instrument and control corresponding system, this technology effluent quality is more stable, and impact resistance will further strengthen, and can guarantee fully to refine oil, the needs of Chemical Manufacture.
Practice result shows: the COD of this system clearance can reach more than 90%, BOD 5Clearance can reach more than 95%; Water outlet COD, suspended substance (SS), oil (OiL), NH 3-N index is controlled at 10mg/l, 20mg/l, 1.0mg/l respectively, below the 1.0mg/l.
Embodiment
Further specify characteristics of the present invention below by specific embodiment.
Embodiment
Present embodiment is to Daqing Refinery company oil refining sewerage advanced treatment.
The principal pollutant of this oil refining sewerage are petroleum-type carbonaceous organic material matter, and after A/O (detest, aerobic series connection) art breading, principal pollutant matter such as oil in water emulsion wherein, lighter hydrocarbons and phenol, aldehyde are all removed preferably.By the water quality analysis data as can be seen, mainly contain a certain amount of suspended substance, solvability bio-degradable material etc. in this waste water, its waste water has certain biodegradability, BOD 5/ COD ratio is 0.25-0.35.With the oil refining sewerage after the above-mentioned A/O art breading again through method advanced treatment of the present invention.
(1) treatment capacity: 500m 3/ h, system works pressure: 0-0.4Mpa.
(2) control water inlet pollutent: COD≤120mg/l, NH 3-N≤20mg/l, suspended substance≤50mg/l, temperature 15-25 ℃; The present embodiment influent quality sees Table 1.
(3) see Table 2 by the inventive method result.As shown in Table 2, the total clearance of COD is 99.93%, total clearance of oil is 99.99%, NH 3The total clearance of-N is 99.99%, the total clearance of suspended substance is 98.52%.
The total effluent quality in table 1 oily water treatment field (advanced treatment apparatus influent quality)
Project Unit The oily(waste)water influent quality The oily(waste)water effluent quality Oily(waste)water field mixed solution water quality The total effluent quality in oily(waste)water field
mg/l ?6-9 ??6.95 ??6.87 ????6-9
SS mg/l ?100 ??46 ??94.72 ????37.88
COD mg/l ?650 ??115 ??343.53 ????61.83
BOD 5 mg/l ?195 ??28.71 ??117.63 ????17.64
Carbide mg/l ?180 ??0.054 ??17.06 ????0.023
Volatile phenol mg/l ?30 ??0.012 ??12.10 ????0.0048
Oil mg/l ?60 ??1.70 ??25.58 ????0.893
Prussiate mg/l ?3 ??0.237 ??1.27 ????0.093
Ammonia nitrogen mg/l ?120 ??24.10 ??54.37 ????10.44
Total phosphorus mg/l ?2.5 ??9.85 ??2.07 ????1.14
Table 2 production waste advanced treatment removal effect
Unit title project The high efficient aeration bio-reactor Sand filter Ozone oxidation More medium filter A More medium filter B Efficient compound filter Microfilter filters Total clearance, % Total water outlet, mg/l Standard, mg/l
?COD (mg/l) Water inlet ??61.83 ??32 ??24.5 ????10.20 ??6.58 ??4.26 ??2.98 ??99.93 ??0.04 ??≤2
Water outlet ??32 ??24.5 ??10.20 ????6.58 ??4.26 ??2.98 ??0.04
Clearance, % ??48 ??25 ??58 ????35 ??35 ??30 ??98.6
?BOD 5(mg/l) Water inlet ??17.64 ??7.04 ??4.57 ????2.97 ??1.93 ??1.20 ??0.90 ??99.43 ??0.10 ??≤2
Water outlet ??7.04 ??4.57 ??2.97 ????1.93 ??1.20 ??0.90 ??0.1
Clearance, % ??59.8 ??35 ??65 ????35 ??37 ??25 ??88
Oil (mg/l) Water inlet ??0.893 ??0.893 ??0.46 ????0.46 ??0.32 ??0.2 ??0.12 ??99.99 ??0.00 ??≤05
Water outlet ??0.893 ??0.46 ??0.46 ????0.32 ??0.2 ??0.12 ??0.00
Clearance, % ??0.0 ??48 ??0.0 ????30.43 ??37.50 ??40 ??99.99
??SS (mg/l) Water inlet ??37.88 ??19.51 ??6 ????5.5 ??4.2 ??3.6 ??2.90 ??98.52 ??0.5 ??≤5
Water outlet ??19.51 ??6 ??5.5 ????4.2 ??3.6 ??2.9 ??0.5
Clearance, % ??48.52 ??69 ??8 ????23 ??14 ??19 ??82
?NH 3-N (mg/l) Water inlet ??10.44 ??4.10 ??3.2 ????3.1 ??1.2 ??0.60 ??0.1 ??99.99 ??0.00 ??≤0.1
Water outlet ??4.1 ??3.2 ??3.1 ????1.2 ??0.60 ??0.1 ??0.00
Clearance, % ??60.7 ??20 ??3 ????6.1 ??50 ??83 ??99.99
Phosphorus (mg/l) Water inlet ??1.14 ??0.866 ??0.260 ????0.18 ??0.14 ??0.10 ??0.08 ??94.7 ??0.05 ??≤0.5
Water outlet ??0.865 ??0.260 ??0.18 ????0.14 ??0.10 ??0.08 ??0.05
Clearance, % ??24 ??70 ??30 ????22 ??28 ??20 ??37

Claims (3)

1. advanced treatment method for sewage water is characterized in that treating processes is as follows:
(1) oil refining after biochemical treatment, chemical engineering sewage enter the high efficient aeration bio-reactor, and make filler in the sewage submergence reactor, its water outlet adds flocculation agent, behind thorough mixing, enter sand filter, described flocculation agent is aluminium iron polychloride and polyacrylamide, its add-on is respectively 20-50mg/l and 2-4mg/l, described oil refining, chemical engineering sewage COD≤120mg/l, NH 3-N≤20mg/l, suspended substance≤50mg/l;
(2) by the water outlet of step (1) sand filter with enter the biological activated carbon tower after ozone mixes, arrheaed 10-15 minute, described ozone amount is 5-10mg/l;
(3) water after the oxidation of step (2) biological activated carbon tower enters two placed in-line efficient more medium filters filtrations successively;
(4) water after step (3) is filtered enters efficient compound filter and filters, and water outlet reaches the circulating cooling make-up water standard;
(5) water after step (4) is filtered filters through Microfilter again, reaches de-salted water moisturizing standard.
2. in accordance with the method for claim 1, it is characterized in that the described high efficient aeration bio-reactor of step (1) has the filler of vesicular structure in the aeration zone filling, described filler is spherical polypropylene skeleton and fills varicosity in inside and gather amino ester that loadings is the 20-30% of reactor volume.
3. in accordance with the method for claim 1, it is characterized in that the described efficient more medium filter of step (3) is columniform, portion from bottom to top fills quartz sand, haydite, hard coal, active carbon filler successively within it, their volume ratio is 1: 1: 1: 1, their particle diameter is 0.5-2.0mm, and filler total fill able height is 800-1200mm.
CN 02155207 2002-12-06 2002-12-06 Sewage deeply treating process Expired - Fee Related CN1208260C (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100341802C (en) * 2005-01-21 2007-10-10 中国科学院生态环境研究中心 Method for deep treatment of bromine ion-containing drinking water
CN100443424C (en) * 2004-11-15 2008-12-17 广州市环境保护工程设计院有限公司 Chinese medicine production waste water treating system and its waste water treating method
CN101337755B (en) * 2008-08-29 2010-06-02 哈尔滨工业大学 Biodegradation process for ultra-thick oil waste water in oilfield
CN102070239A (en) * 2011-02-25 2011-05-25 中国海洋石油总公司 Method for treating high-acidity heavy crude oil processing wastewater by catalytic oxidation with ozone
CN102079593A (en) * 2010-12-06 2011-06-01 北京市水利科学研究所 Combined type process method and device for cycling filtration, denitrification, dephosphorization and alae killing of polluted surface water
CN102190746A (en) * 2010-03-17 2011-09-21 河南师范大学 Method for preparing modified flocculant for dehydrating sludge
CN102050913B (en) * 2009-10-30 2012-11-21 中国石油化工股份有限公司 Temperature and salt resistant grafted polyacrylamide and preparation method thereof
CN103866737A (en) * 2014-03-18 2014-06-18 云南大学 Method for ecologically restoring river channel by taking reclaimed water as main water source
CN104591406A (en) * 2015-01-14 2015-05-06 苏忠 Method for treating chemical industrial sewage with klebsiella pneumoniae
CN105271566A (en) * 2014-12-16 2016-01-27 新疆科力新技术发展有限公司 Oil field complex component waste water processing system and application technology thereof
CN105776746A (en) * 2016-04-05 2016-07-20 北京北华中清环境工程技术有限公司 Integrated wastewater treatment process and system for chemical industrial park
CN108996814A (en) * 2018-07-19 2018-12-14 江苏澳洋生态园林股份有限公司 A kind of municipal sewage and rainwater combined treatment process

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100443424C (en) * 2004-11-15 2008-12-17 广州市环境保护工程设计院有限公司 Chinese medicine production waste water treating system and its waste water treating method
CN100341802C (en) * 2005-01-21 2007-10-10 中国科学院生态环境研究中心 Method for deep treatment of bromine ion-containing drinking water
CN101337755B (en) * 2008-08-29 2010-06-02 哈尔滨工业大学 Biodegradation process for ultra-thick oil waste water in oilfield
CN102050913B (en) * 2009-10-30 2012-11-21 中国石油化工股份有限公司 Temperature and salt resistant grafted polyacrylamide and preparation method thereof
CN102190746A (en) * 2010-03-17 2011-09-21 河南师范大学 Method for preparing modified flocculant for dehydrating sludge
CN102190746B (en) * 2010-03-17 2012-10-31 河南师范大学 Method for preparing modified flocculant for dehydrating sludge
CN102079593A (en) * 2010-12-06 2011-06-01 北京市水利科学研究所 Combined type process method and device for cycling filtration, denitrification, dephosphorization and alae killing of polluted surface water
CN102079593B (en) * 2010-12-06 2013-01-02 北京市水利科学研究所 Combined type process method and device for cycling filtration, denitrification, dephosphorization and alae killing of polluted surface water
CN102070239A (en) * 2011-02-25 2011-05-25 中国海洋石油总公司 Method for treating high-acidity heavy crude oil processing wastewater by catalytic oxidation with ozone
CN103866737A (en) * 2014-03-18 2014-06-18 云南大学 Method for ecologically restoring river channel by taking reclaimed water as main water source
CN103866737B (en) * 2014-03-18 2016-01-13 云南大学 A kind of take regenerated water as the river corridor restoration method at main water source
CN105271566A (en) * 2014-12-16 2016-01-27 新疆科力新技术发展有限公司 Oil field complex component waste water processing system and application technology thereof
CN104591406A (en) * 2015-01-14 2015-05-06 苏忠 Method for treating chemical industrial sewage with klebsiella pneumoniae
CN105776746A (en) * 2016-04-05 2016-07-20 北京北华中清环境工程技术有限公司 Integrated wastewater treatment process and system for chemical industrial park
CN108996814A (en) * 2018-07-19 2018-12-14 江苏澳洋生态园林股份有限公司 A kind of municipal sewage and rainwater combined treatment process

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