CN100554195C - A kind of waste water treatment process and purposes to high-ammonia nitrogen low C/N ratio - Google Patents

A kind of waste water treatment process and purposes to high-ammonia nitrogen low C/N ratio Download PDF

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Publication number
CN100554195C
CN100554195C CNB2007101206571A CN200710120657A CN100554195C CN 100554195 C CN100554195 C CN 100554195C CN B2007101206571 A CNB2007101206571 A CN B2007101206571A CN 200710120657 A CN200710120657 A CN 200710120657A CN 100554195 C CN100554195 C CN 100554195C
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waste water
ibaf
ammonia nitrogen
ratio
treatment process
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CN101139134A (en
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曾明
倪晋仁
叶正芳
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BEIJING GAIYA TECHN CENTER Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention provides a kind of waste water treatment process and purposes, this process using " pre-treatment+immobilized microorganism-BAF combination process " to high-ammonia nitrogen low C/N ratio.Waste water at first enters the S section of combination process, removes most suspended substances and portion C OD in the waste water, prevents the filtrate among the suspended substance obstruction IBAF in the waste water, guarantees the steady running of follow-up IBAF technology.The water outlet of S section enters the IBAF biological treatment, removes most ammonia-nitrogen and COD in the waste water, and water outlet can directly efflux or reuse after appropriate depth is handled.Advantage of the present invention is: compare with traditional treatment process, S-IBAF technology is simple, denitrification effect good, floor space is little, working cost is low, sludge yield is few and operational management convenient.Purposes of the present invention is: not only wastewater treatments such as the corn deep processing of synthetic ammonia and nitrogen fertilizer industry waste water, coal system methanol industrial wastewater, leather waste water, food service industry, monosodium glutamate industry and transformation are had effect unique, and be applicable to the processing and the reuse of other high-ammonia nitrogen low C/N ratio wastewater.

Description

A kind of waste water treatment process and purposes to high-ammonia nitrogen low C/N ratio
Technical field
The present invention relates to field of waste water treatment, more particularly, relate to a kind of being used for method and purposes that high-ammonia nitrogen low C/the N ratio wastewater is handled, concrete industry comprises synthetic ammonia and nitrogen fertilizer industry waste water, coal system methanol industrial wastewater, leather waste water, food service industry (as corn deep processing, monosodium glutamate industry etc.) wastewater treatment and transformation etc.
Background technology
Method for treating ammonia-nitrogen wastewater has physics method, chemical method and biological process etc. at present.Physical method has reverse osmosis, distillation, soil irrigation; Chemical method has ion exchange method, air stripping, chemical precipitation method, break point chlorination, electrodialysis, electrochemical treatment, catalytic pyrolysis.Because there are characteristics such as working cost height in physics and chemical process, its application only limits to part industry and field, and present most of denitrification process combines based on biological treatment or biological treatment and physico-chemical process.Aspect biological denitrificaion, the biological method that adopts has various ways at present, wherein mainly contains the denitride technology of the following aspects.
The tradition nitration denitrification
Tradition nitration denitrification technology denitrogenation processing process comprises two stages of nitrification and denitrification.Organonitrogen is being converted on the basis of ammonia nitrogen, the nitrated stage is the process that the ammonia nitrogen in the sewage is oxidized to nitrite nitrogen or nitrate nitrogen; The denitrification stage is the process that the nitrate that will produce in the nitrifying process or nitrite are reduced into nitrogen.Have only when the nitrogen in the waste water exists with the form of nitrite nitrogen and nitrate nitrogen, only need stage of denitrification.Technologies such as A/O, SBR, CASS, MBR, oxidation ditch just belong to traditional denitrification process, all can realize biological nitration and denitrification.Although certain effect has been played in the denitrogenation of traditional nitration denitrification technology aspect denitrogenation of waste water, but still have following problem: 1. the nitrifying bacteria community rate of propagation is slow and be difficult to keep higher biological concentration, particularly in low temperature winter.Therefore cause system's total hrt (HRT) long, organic loading is lower, has increased initial cost and working cost; 2. nitrifying process is finished under aerobic conditions, needs a large amount of energy consumptions; 3. denitrification process needs certain organism, and the COD in the waste water has most to be removed through aeration, so often will add carbon source (for example methyl alcohol) during denitrification in addition; 4. system keeps higher biological concentration and obtains good denitrification effect, must carry out mud backflow and nitrification liquid simultaneously and reflux, and has increased power consumption and working cost; 5. a little less than the impact resistance, ammonia nitrogen in high density and nitrite water inlet can suppress the growth of nitrifier; 6. the acidity that produces with nitrifying process in being need add the alkali neutralization, has increased processing costs.Because traditional nitration denitrification has some drawbacks, the focus of some scholar's research concentrates on and how to improve traditional nitration denitrification technology both at home and abroad.The Recent study achievement mainly contains short-cut nitrification and denitrification, Anammox, while nitration denitrification, denitrification dephosphorization etc., below puts up with these problems and does simple argumentation.
Short-cut nitrification and denitrification
Short-cut nitrification and denitrification claims the nitrosification denitrification again, and the nitration reaction process control is produced NO in ammonia oxidation 2 -Stage, stop NO 2 -Further oxidation is directly with NO 2 -Carry out denitrification as thalline respiratory chain hydrogen acceptor.This process has reduced nitrite-oxidizing and has become nitrate, and nitrate restores into the generation of two reactions of nitrite then, has reduced the input amount of organic carbon in oxygen requirement, the denitrification process, has reduced energy consumption and working cost.Short-cut nitrification and denitrification is compared with traditional biological denitrificaion and is had the following advantages: 1. for activated sludge process, can save 25% oxygen-supplying amount, cut down the consumption of energy; 2. save the required carbon source 40% of denitrification, under the certain situation of C/N, can improve the clearance of total nitrogen (TN); 3. reduce sludge quantity and can reach 50%; 4. reduce alkaline consumption; 5. improve speed of reaction, shorten the reaction times, reduce reactor volume.Realize that short distance nitration and denitrifying key are the activity of inhibition nitrifier and make NO 2 -Obtain accumulation.Influence nitrifier activity and NO 2 -The cumulative factor has free ammonia, pH, DO, temperature etc.
Short-cut nitrification and denitrification still is in the mechanism conceptual phase completely, because controlled condition restriction still is in laboratory study or lab scale stage at present on using, does not still have report at present on engineering is used.
The while nitration denitrification
Tradition nitration denitrification biological denitrificaion method thinks that nitrifying process finished by autotrophic bacteria under aerobic condition, denitrification process detesting/and finishes by heterotrophic bacterium under the anoxia condition, the requirement difference of two process conditions generally can not take place simultaneously, can only carry out by list type.Some studies show that: nitrifying process is not only finished by autotrophic bacteria in the biological denitrification process, and some heterotrophic bacterium also can participate in; Certain micro-organisms can carry out nitrification and denitrification simultaneously under aerobic condition.Thereby, nitrifying process and denitrification process can be in same reactors, take place simultaneously under the same operation condition, and can reach the kinetic balance of two processes, i.e. nitration denitrification (Simultaneous Nitrification-Denitrification simultaneously, be called for short SND), this will simplify the biological process denitrification process greatly.Compare with traditional nitration denitrification biological denitrificaion method, the SND process has the following advantages:
(1) nitrifying process and denitrification process can carry out in a reactor simultaneously, then can save more floor space;
(2) avoid NO 2 -Be oxidized to NO 3 -And NO 3 -Restore into NO 2 -These two unnecessary reactions, thus about 25% O can be saved 2With the supplementary carbon source more than 40%; (3) basicity consumption reduces.
Anammox
Anammox (Anaerobic ammonia oxidation is called for short ANAMMOX) is meant that under anaerobic the microorganism that with Planctomycetalessp is representative is directly with NH 4 +Be electron donor, with NO 2 -Or NO 3 -Be electron acceptor(EA), with NH 4 +, NO 2 -Or NO 3 -Be transformed into N 2Biological oxidation process.This process utilizes the unique biological body as electron donor ammonia nitrogen to be converted into N with nitrate 2, realized that to greatest extent the circulation anaerobic of N is nitrated, this coupled process has good prospect for denitrogenation from the nitrated waste water of anaerobism, for the sewage of high-ammonia nitrogen low C OD because the partial oxidation of nitrate has been saved the energy greatly.Infer that at present Anammox has number of ways.Wherein a kind of is that oxyammonia and nitrite generate N 2The reaction of O, and N 2O can further be converted into nitrogen, and ammonia is oxidized to oxyammonia.Another kind is that ammonia and oxyammonia reaction generate hydrazine, and hydrazine is converted to nitrogen and generates 4 reductibilities [H], and reductibility [H] is passed to the nitrous acid restoring system and forms oxyammonia.The third is: nitrous acid is reduced to NO on the one hand, and NO is reduced to N 2O, N 2O is reduced into N again 2On the other hand, NH 4 +Be oxidized to NH 2OH, NH 2OH is through N 2H 4, N 2H 2Be converted into N 2The advantage of anaerobic ammonia oxidation process: the oxygenation energy consumption that can reduce nitration reaction significantly; Remove the external source electron donor of anti-nitration reaction from; Can save required neutralization reagent in traditional nitration denitrification reaction process; The sludge quantity that produces is few.The weak point of Anammox is: up to the present, the reaction mechanism of Anammox, participation bacterial classification and operations parameter are indeterminate.
In sum, the ammonia nitrogen removal method has multiple, and different methods has advantage and weak point separately, needs to take the combination treatment of multiple technologies sometimes, and just can learn from other's strong points to offset one's weaknesses reaches treatment effect preferably.And because the difference on the different wastewater properties, we must be at the character of different trade effluents, and its contained composition gos deep into systematic research, selects and definite treatment technology and technology thereof.Meanwhile, we also will select efficiently as much as possible, economic, stable method is handled ammonia nitrogen waste water, avoid secondary pollution.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, and a kind of novel high-ammonia nitrogen low C/N ratio wastewater treatment combination technology is provided.
The object of the invention can realize by following measure: adopt " pre-treatment+immobilized microorganism-BAF combination process " (hereinafter to be referred as the S-IBAF combination process) to handle high-ammonia nitrogen low C/N ratio wastewater.High-ammonia nitrogen low C/N ratio wastewater at first enters the S section of combination process, and most suspended substances (SS) and portion C OD in this removal waste water prevent the filtrate among the SS obstruction IBAF in the waste water, to guarantee the steady running of follow-up IBAF technology.The water outlet of S section enters IBAF biological treatment unit, most ammonia-nitrogen and COD in this removal waste water, and its water outlet can directly efflux or reuse after appropriate depth is handled.
Wherein:
At S section pretreatment stage, adopt aeration preoxidation, precipitation or air-float technology,, make that the most of SS in the waste water is removed by strengthening pre-treatment, prevent the filtrate in the SS obstruction back segment IBAF technology in the waste water, guarantee the continous-stable operation of IBAF biological treatment.
In the IBAF section, adopt immobilized microorganism-BAF can remove most ammonia nitrogen and COD in the waste water, its water outlet can directly efflux or reuse after advanced treatment.
In the IBAF section, by regulating the dissolved oxygen in each section IBAF water body, form the processing condition of aerobic-anaerobic-aerobic, and, remove when can realize ammonia nitrogen and total nitrogen by replenishing an amount of organic carbon source at anoxic water inlet front end; The aerobic section dissolved oxygen is 3-5mg/l; Anoxic section dissolved oxygen is 0.5-1.0mg/L; Ammonia nitrogen removal frank is 90-99%, and nitrogen removal rate is 70-85%.
Adopt immobilized microorganism technique among the IBAF, used efficient suspension macropore carrier (CN2004100625771), wherein the microorganism of being adopted is an engineering bacteria, and the original strain of engineering flora is provided by the BIC-SYSTEMS company of the U.S., the following http://www.biobugs.com of its network address.
Efficient suspension macropore carrier among the IBAF is seated in the multiaspect hollow ball, can increase mass transfer effect, improve oxygen utilization rate, prevent channel, reduce the wear rate of macropore carrier, simultaneously, because filling multiaspect hollow ball in the IBAF pond, can effectively prevent the filter tank obstruction, guarantee the continous-stable operation of technology.
Multiaspect hollow ball among the IBAF is a polypropylene material, and its diameter is within 50-150mm, and ball surface mesh distance is 5-10mm.
This combination process not only has effect unique to synthetic ammonia and nitrogen fertilizer industry waste water, coal system methanol industrial wastewater, leather waste water, food service industry (as corn deep processing, monosodium glutamate industry etc.) wastewater treatment and transformation, and is applicable to the processing and the reuse of other high-ammonia nitrogen low C/N ratio wastewater.
The present invention compares with traditional technology has following advantage: integrated artistic is simple, denitrification effect good, remove when can realize ammonia nitrogen and total nitrogen, floor space is little, working cost is low, sludge yield is few, no stink, do not need frequent back flushing, operational management to make things convenient for etc.; And, the S-IBAF combination process can be realized efficiently coupling with wastewater recycling treatment process (as reverse osmosis desalination), be particularly suitable for the pretreatment technology of membrane technique during waste water recycling is handled in the future, realize recycle and enterprise's sewage " zero release " of water resources, reach the purpose of energy-saving and emission-reduction.
Description of drawings
Fig. 1: process flow sheet of the present invention
Illustrate among the figure:
---the water route
---------road
-----gas circuit
Embodiment
Enumerate 3 embodiment below, in conjunction with the accompanying drawings, the present invention is further specified, but the present invention is not only limited to this 3 embodiment.
Embodiment 1
Certain starch factory is the raw material production high-quality starch with the corn, day sewage effluent amount 1300m 3/ d, existing sewage treatment process are " UASB (anaerobism)+SBR (aerobic)+bio-contact oxidation ".UASB technology is stable, and treatment effect is better.When water inlet COD was 8000-12000mg/L, water outlet COD was generally about 800mg/L, and the water outlet COD of SBR is 300-400mg/L, but the operating performance of contact oxidation technology is relatively poor, water outlet COD 〉=180mg/L, NH 3-N exceeds standard seriously, can't reach relevant water outlet emission standard.Employing is that main process carries out the lab scale experiment at the scene with S-IBAF, the experiment flooding velocity is 4L/h, and the effective volume of IBAF retort is 80L, and hydraulic detention time is 20h, the carrier loadings is 60% (efficient carrier stacking volume is 48L), and microbe inoculation is an engineering bacteria.The experiment water inlet is this starch factory sewage disposal workshop water outlet, and water inlet COD concentration is 198.0mg/L to 241.0mg/L, and effluent COD concentration is 36.0mg/L to 47.0mg/L; Water inlet NH 3-N concentration is 246.0mg/L to 432.0mg/L, water outlet NH 3-N concentration is 1.1mg/L to 3.8mg/L.
Embodiment 2
Certain Gourmet Powder Factory is the raw material production monosodium glutamate with the W-Gum, day sewage effluent amount 8000m 3/ d, existing sewage treatment process are " UASB (anaerobism)+SBR (aerobic) ".The water outlet COD of SBR is 100-200mg/L, NH 3-N exceeds standard seriously, can't reach relevant water outlet emission standard.Employing is that main process carries out the lab scale experiment at the scene with S-IBAF, the experiment flooding velocity is 4L/h, the effective volume of IBAF retort is 60L, hydraulic detention time is 15h, the carrier loadings is 60% (efficient carrier stacking volume is 36L), and microbe inoculation is an engineering bacteria, and the experiment water inlet is sewage disposal plant effluent, the water inlet for COD concentration at 104.0mg/L to 164.0mg/L, effluent COD concentration is at 13.71mg/L to 35.78mg/L; Water inlet NH 3-N concentration is at 154.3mg/L to 361.6mg/L, water outlet NH 3-N concentration is at 0.01mg/L to 0.21mg/L.
Embodiment 3
Certain chemical industry company limited is the little nitrogenous fertilizer enterprises of Hebei province's maximum, and main products throughput is for producing 13.5 ten thousand tons of synthetic ammonia, 200,000 tons in urea, 30,000 tons of methyl alcohol per year, and every day is discharged the about 2000m of high ammonia nitrogen terminal waste water in process of production by enterprise 3Adopt the S-IBAF combination process to carry out the terminal wastewater treatment, pretreatment technology is a radical sedimentation basin, and the IBAF useful volume is 2250m 3, hydraulic detention time is 27h, the carrier loadings is 53%, and (efficient carrier stacking volume is 1200m 3), microbe inoculation is an engineering bacteria.By continous-stable operation 3 months at the beginning of 2007 8 months, CODcr is 500-800mg/L, BOD in water inlet 5For 300-500mg/L, SS are 300-1000mg/L, NH 3-N is under the 500-700mg/L situation, and CODcr is 81-108mg/L, BOD in the effluent quality 5For 8-15mg/L, SS are 40-70mg/L, NH 3-N is 4.8-12mg/L, but continous-stable reaches " ammonia synthesizing industry pollution discharge standard " (GB13458-2001) middle first discharge standard.
Can be seen that by above-mentioned example the present invention all has good treatment effect for the high-ammonia nitrogen low C/N ratio wastewater of different quality, final outflow water can reach one-level or the secondary discharge standard (GB8978-1996) in the integrated wastewater discharge standard; And, because S-IBAF water outlet ammonia nitrogen concentration is very low, make up the proper depth treatment process on this basis, water outlet can be satisfied the water quality requirement of relevant reuse water fully, realizes waste water reclaiming, reaches the purpose that industry energy conservation reduces discharging.

Claims (9)

1. the waste water treatment process to high-ammonia nitrogen low C/N ratio is characterized in that: adopt " S-IBAF combination process " that high-ammonia nitrogen low C/N ratio wastewater is handled; Wherein the S section is represented pretreatment unit, and the IBAF section is represented immobilized microorganism-BAF unit; At S section pretreatment stage, adopt aeration preoxidation, precipitation or air-float technology,, make that the most suspended substances SS in the waste water is removed by strengthening pre-treatment, prevent the filtrate in the ss suspended solid obstruction back segment IBAF technology in the waste water, guarantee the continous-stable operation of IBAF biological treatment.
2. according to the described waste water treatment process of claim 1 to high-ammonia nitrogen low C/N ratio, it is characterized in that: in the IBAF section, adopt immobilized microorganism-BAF can remove most ammonia nitrogen and COD in the waste water, its water outlet can directly efflux or reuse after advanced treatment.
3. according to the described waste water treatment process of claim 1 to high-ammonia nitrogen low C/N ratio, it is characterized in that: in the IBAF section, by regulating the dissolved oxygen in each section IBAF water body, form the processing condition of aerobic-anaerobic-aerobic, and, remove when can realize ammonia nitrogen and total nitrogen by replenishing an amount of organic carbon source at anoxic water inlet front end; The aerobic section dissolved oxygen is 3-5mg/l; Anoxic section dissolved oxygen is 0.5-1.0mg/L; Ammonia nitrogen removal frank is 90-99%, and nitrogen removal rate is 70-85%.
4. according to the described waste water treatment process of claim 2, it is characterized in that: adopt immobilized microorganism technique among the IBAF, used efficient suspension macropore carrier high-ammonia nitrogen low C/N ratio.
5. according to the described waste water treatment process to high-ammonia nitrogen low C/N ratio of claim 2, it is characterized in that: adopt immobilized microorganism technique among the IBAF, wherein the microorganism of being adopted is an engineering bacteria.
6. according to the described waste water treatment process of claim 4 to high-ammonia nitrogen low C/N ratio, it is characterized in that: the macropore carrier that efficiently suspends is seated in the multiaspect hollow ball, can increase mass transfer effect, improve oxygen utilization rate, prevent channel, reduce the wear rate of macropore carrier, simultaneously, because filling multiaspect hollow ball in the IBAF pond, can effectively prevent the filter tank obstruction, guarantee the continous-stable operation of technology.
7. according to the described waste water treatment process to high-ammonia nitrogen low C/N ratio of claim 6, it is characterized in that: the multiaspect hollow ball is a polypropylene material, and its diameter is within 50-150mm, and ball surface mesh distance is 5-10mm.
8. according to the described waste water treatment process of claim 1 to high-ammonia nitrogen low C/N ratio, it is characterized in that: the waste water treatment process of high-ammonia nitrogen low C/N ratio, realize efficient coupling with the reverse osmosis desalination wastewater recycling treatment process, the pretreatment technology that is fit to membrane technique during waste water recycling is handled in the future, recycle and enterprise's sewage zero-discharge of realization water resources.
9. by the purposes of the described waste water treatment process to high-ammonia nitrogen low C/N ratio of claim 1, this combination process is to corn deep processing, the monosodium glutamate Industrial Wastewater Treatment of synthetic ammonia and nitrogen fertilizer industry waste water, coal system methanol industrial wastewater, leather waste water, food service industry and transform effectively.
CNB2007101206571A 2007-08-23 2007-08-23 A kind of waste water treatment process and purposes to high-ammonia nitrogen low C/N ratio Expired - Fee Related CN100554195C (en)

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CN101993175B (en) * 2009-08-27 2013-02-13 中国石油化工股份有限公司 Nitrosification treatment method of ammonia nitrogen in high-concentration ammonia nitrogen wastewater
CN102491435B (en) * 2011-11-14 2013-07-10 河北凯跃化工集团有限公司 Treatment method for high-pollution sewage of synthetic ammonia and methanol production system
CN102583885B (en) * 2012-02-16 2013-10-23 北京工业大学 Technology and method for treating urban sewage by three-section short-cut nitrification/ anaerobic ammonia oxidation
CN102583895B (en) * 2012-03-01 2013-10-30 贵州绿色环保设备工程有限责任公司 High-ammonia-nitrogen wastewater treatment method
CN103043858B (en) * 2012-12-21 2013-12-18 菱花集团有限公司 Monosidum glutamate industrial wastewater recycling process and device
CN104310696A (en) * 2014-05-09 2015-01-28 中国科学院生态环境研究中心 Method for treating and recycling leather wastewater by electro-adsorption
CN106007262B (en) * 2015-06-05 2019-08-02 南京博知源环境科技有限公司 The method for handling quinoline pollutant in sewage
CN106007251B (en) * 2015-06-05 2019-02-15 广州市中绿环保有限公司 A kind of method of quinoline pollutant in processing sewage
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