CN105645665B - A kind of processing method of organic wastewater with difficult degradation thereby - Google Patents
A kind of processing method of organic wastewater with difficult degradation thereby Download PDFInfo
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Abstract
The invention discloses a kind of processing methods of organic wastewater with difficult degradation thereby, it mainly include anoxic unit, aerobic unit and denitrogenation unit, nitrosation dominant bacteria is added in aerobic unit, nitrosoation rate is 65% ~ 80% in control nitrified effluent, wherein aerobic unit is discharged a part and is back to anoxic unit, reflux ratio is controlled 25% ~ 50%, another part enters denitrogenation unit, discharges after denitrogenation cell processing.The present invention plays the synergistic effect between flora by controlling ratio and the mixed liquid recycle ratio of nitration product, and then realizes the dual processing up to standard of COD and total nitrogen in waste water.The method of the present invention has the characteristics that process is short, land occupation saves, reflux ratio is low, treatment effeciency is high.
Description
Technical field
The invention belongs to technical field of waste water processing, and in particular to a kind of processing method of organic wastewater with difficult degradation thereby.
Background technique
With the rapid development of the industries such as petrochemical industry, plastics, synthetic fibers, printing and dyeing, coal chemical industry, especially new technology,
New material continues on, and persistent organic pollutants type gradually increases in the waste water for generating these enterprises, the place of waste water
Difficulty is managed to increase.Although the physico-chemical process such as advanced oxidation can handle organic wastewater with difficult degradation thereby, but because there are it is at high cost,
Mineralising is incomplete, is also easy to produce the deficiencies of secondary pollution, therefore is usually used in the pretreatment of biological treatment, to improve biodegradability.Biology
Processing is because investment is small, processing cost is low, mineralising is complete, and the terminal technology as wastewater treatment, in organic wastewater with difficult degradation thereby
Treatment process in it is of increasing concern.
Pollutant in organic wastewater with difficult degradation thereby mainly includes hydro carbons, phenols, Ppolynuclear aromatic, nitro compound, nitrogenous
Heterocyclic compound etc. especially cannot quickly be identified by microorganism mostly by artificial synthesized certain organic matters and have to microorganism
Inhibiting effect cannot be decomposed by the microorganisms utilization in a short time, therefore traditional bioremediation is carried out certainly with activated sludge
So culture acclimated microorganism cannot be removed effectively the pollutant in waste water.
Wu Yucheng etc. (benzene and toluene under Denitrification Conditions in microbial degradation underground water, China Environmental Science, 1999
(06)) carry out the research of benzene in microbial degradation underground water under Denitrification Conditions, find micro- life under the conditions of intensified anti-nitrated
Object can be using nitrate as electron acceptor degradation benzene.(several nitrogen-containing heterocycle compound anoxics drop Li Yongmei etc. in coking wastewater
Solve mechanism, Tongji University's journal, 2001 (06)) it anoxic denitrification has been carried out to nitrogen-containing heterocycle compounds several in coking wastewater has ground
Study carefully.Shen marine rainbow etc. (anoxic denitrification removes heterocycles, pyridines research difficult to degrade, Shanghai environmental science (11)) utilizes anoxic
Denitrification studies heterocycles, pyridines, has all affirmed the effect of anoxic denitrification removal hardly degraded organic substance.Cause
This, under anoxia condition to it is toxic or compared in organic wastewater with difficult degradation thereby be added nitrate as electron acceptor remove Organic substance in water be
A kind of new sewage treatment means.Anaerobic hydrolysis-acidification process has some superiority to organic wastewater with difficult degradation thereby processing, but still
So there are biological transformation ratios low, anaerobic hydrolysis-acidification microbe concentration tolerance degree is limited and hydrolysis acidification system
The problems such as there are Accumulation of Organic Acids.As traditional activated sludge process processing technological flow is long, takes up a large area, lance complicated for operation
Shield becomes increasingly conspicuous, and is attempted to improve organic wastewater with difficult degradation thereby by improving with optimization metabolism strain improvement and reaction process
Degradation efficiency.
CN201010218533.9 discloses a kind of composite and highly effective microorganism preparation and system for refractory wastewater
Standby and application, the invention solve the processing problem of organic wastewater with difficult degradation thereby by adding microbial inoculum, but do not carry out to technique
Optimization, the residence time of wastewater treatment are still up to 60 hours or more.It is organic that CN200710090244.3 discloses a kind of high concentration
Waste water advanced denitrifying method, this method include that the anaerobism being sequentially connected togather removes carbon area, aerobic nitrosated area adds anaerobism
Ammoxidation denitrogenation area and traditional nitration denitrification district's groups at, need to be made of six independent reaction tanks, treatment process is longer, and
It is not directed to the treatment effect of the waste water containing hardly degraded organic substance.CN201110007336.7 discloses a kind of processing dry method nitrile
The double back flow denitrification MBR technique of synthetic fibre waste water, mainly by tetra- preposition anoxic pond, nitrification tank, postposition anoxic pond and MBR major functions
Unit composition realizes the removal of organic matter and ammonia nitrogen by the double back streaming system of setting nitrification liquid and sludge condensation liquid.The invention
Compared with common forward type " anaerobic-aerobic " type MBR reactor of reflux ratio 200% ~ 400%, aerobic tank mixed liquid recycle ratio is
150%, reduce 38% ~ 45% operating cost, total hrt 30 hours, COD removal rate are discharged COD up to 70% ~ 80%
Concentration is 190 ~ 360mg/L, and the COD in water outlet also needs to be further processed to can be only achieved discharge standard.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of processing methods of organic wastewater with difficult degradation thereby.The present invention is logical
Ratio and the mixed liquid recycle ratio of control nitration product are crossed to play the synergistic effect between flora, and then realizes COD in waste water
With the dual processing up to standard of total nitrogen.The method of the present invention has the characteristics that process is short, land occupation saves, reflux ratio is low, treatment effeciency is high.
The processing method of organic wastewater with difficult degradation thereby of the present invention, including anoxic unit, aerobic unit and denitrogenation unit, aerobic
Unit adds nitrosation dominant bacteria, and controlling nitrosoation rate in nitrified effluent, 65% ~ 80%, wherein aerobic unit water outlet is a part of returns
It is flow to anoxic unit, controls reflux ratio 25% ~ 50%, another part enters denitrogenation unit, discharges after denitrogenation cell processing.
The operating condition of anoxic unit of the present invention is that pH is 7.5 ~ 8.5, DO < 0.2mg/L, and temperature is 30 ~ 40 DEG C.
Aerobic unit of the present invention needs to control nitrosoation rate between 65% ~ 80%, just can guarantee that aerobic unit goes out
Water, which is back to anoxic zone, has facilitation to toxic and hard-degraded substance removal, and can be improved degradation rate.The present invention is good
The nitrosation dominant bacteria of oxygen unit only needs to add when starting period and unit water outlet nitrosoation rate are lower than 65%, nitrosation advantage
The acquisition of bacterium be it is well-known to those skilled in the art, preferably add CN201010221166.8 the method acquisition dominant bacteria
Group, the acquisition of nitrosation dominant bacteria includes following three cultivation stages: first stage: the mixing of enrichment Nitrosomas and Nitromonas
Flora obtains ammonia nitrogen removal frank up to 90% or more nitrifying bacteria community；Second stage: using high-temperature cultivation replace with room temperature culture into
Capable method carries out Nitromonas elutriation, the superiority of Nitrosomas is gradually increased, high-temperature cultivation replaces training with room temperature culture
The method of supporting carries out 2~6 times, until nitrosoation rate is transferred to phase III culture when being greater than 50%；Phase III: change dissolved oxygen and pH
Condition carries out the further of Nitromonas and eluriates and the stability of Nitrosomas is tamed, until nitrosoation rate is stablized 65% or more, knot
The culture of beam a cycle obtains the flora of nitrococcus dominance, and it is spare then to carry out preservation；Wherein second stage room temperature is trained
The condition of supporting are as follows: temperature is 15~30 DEG C, 0.1~3mg/L of dissolved oxygen, pH value 6~9, and incubation time is 5~30 days；Second stage
The condition of high-temperature cultivation are as follows: temperature is 2~20 DEG C higher than room temperature cultivation temperature, 0.1~3mg/L of dissolved oxygen, pH value 6~9, when culture
Between be 5~30 days；Change dissolved oxygen and pH condition described in phase III refer to every suitable time change dissolved oxygen concentration and
PH value control range, for total Dissolved Oxygen concentration Control in 0.1~3mg/L, total pH control range is 7.5~9.0；Phase III
In incubation every 8~change dissolved oxygen and pH condition for 24 hours, the culture in such a way that dissolved oxygen content and pH step up, or
Person is cultivated by random alternation condition.Aerobic unit control DO of the present invention is in 0.5 ~ 2.5mg/L, and pH value is 8.2 ~ 8.5, temperature
It is 30 ~ 35 DEG C.
Aerobic unit of the present invention is discharged a part and is back to anoxic unit, and reflux ratio is controlled 25% ~ 50%, gone into operation
Startup stage takes the mode that reflux ratio is gradually increased.Specific reflux ratio is needed according to COD:(NO2 --N+NO3 -- N) ratio
It determines, works as COD:(NO2 --N+NO3 -- N) ratio less than 25 when need to reduce reflux ratio, work as COD:(NO2 --N+NO3 --N)
Ratio when being greater than 50, need to increase reflux ratio, the amplitude for reducing and increasing reflux ratio is no more than 20%.
The present invention adds microbial bacterial agent in denitrogenation unit, preferably add CN201210130645.8 or
Microbial bacterial agent described in CN201210130644.3, dosage are the 0.5% ~ 1.0% of handled wastewater volume per hour.It is more excellent
Choosing add simultaneously containing Methylobacterium (Methylobacterium phyllosphaerae) SDN-3, Paracoccus denitrificans
(Paracoccus denitrificans) DN-3, arthrobacterium (Arthrobacter creatinolyticus) FDN-1, water
Family name's Flavobacterium (Flavobacterium mizutaii) FDN-2, marsh cock Salmonella (Kocuria palustris) FSDN-A
With Staphylococcus cohnis (Staphylococcus cohnii) six kinds of bacterial strains of FSDN-C microbial inoculum, the thallus volume ratio of six kinds of bacterium
It is 1:1:1 ~ 5:1 ~ 5:1 ~ 10:1 ~ 3(based on thallus volume, thallus volume is that the bacterium solution containing culture solution is centrifuged under the conditions of 10,000 turns
The thallus volume that separation 5min is obtained, similarly hereinafter), six kinds of bacterial strains are preserved in respectively on March 11st, 2010 and on July 14th, 2011
" China Committee for Culture Collection of Microorganisms's common micro-organisms center ", deposit number be respectively CGMCC No.3660,
CGMCC No.3658, CGMCC No.3657, CGMCC No.3659, CGMCC NO.5061 and CGMCC NO.5062, dosage
It is the 0.1% ~ 0.5% of handled wastewater volume per hour.Denitrogenation unit is needed before microbial inoculum adds according to sludge concentration (MLSS)
Denitrifying activated sludge is added for 1000 ~ 2000mg/L.
Compared with prior art, the invention has the following advantages:
1, the mode for taking anoxic unit mixing aerobic unit water outlet, on the one hand plays dilution to organic wastewater with difficult degradation thereby and makees
With, reduce bio-toxicity；Contain a large amount of nitration products, under anaerobic condition, denitrifying bacterium in the water outlet of another aspect aerobic unit
It will be metabolized using hardly degraded organic substance as electron donor using the oxygen in nitrate nitrogen and nitrite nitrogen as electron acceptor
Activity, and then further decrease Ecotoxicology by denitrification Synergistic degradation hard-degraded substance in anoxic unit and mention
The degradation rate of high hardly degraded organic substance can solve Accumulation of Organic Acids problem in system while improving biological transformation ratio.
2, need to add nitrosation dominant microflora in aerobic unit, on the one hand by artificially changing the biology in activated sludge
Amount improves treatment effeciency, on the other hand can shorten nitration reaction time, save the cost.Add the aerobic of nitrosation dominant bacteria
For unit compared with common aeration unit, required dissolved oxygen concentration is low, can substantially reduce aeration quantity, reduces because of aeration generation
Operating cost；It does not have excessive dissolved oxygen simultaneously and enters the anoxic zone of front end with reflux sewage, so that mainly being sent out in anoxic zone
Raw anaerobic bacteria anaerobic metabolism organic matter and amphimicrobe utilize two processes of oxygen metabolism organic matter in nitrite nitrogen.
Specific embodiment
The processing method of organic wastewater with difficult degradation thereby proposed by the present invention, mainly by containing a large amount of nitrous acid in aerobic unit
The sewage backflow of salt nitrogen to anoxic unit is realized, needs to control the reflux ratio of nitrosoation rate and aerobic unit water outlet.Good
Oxygen unit and denitrogenation unit add the raising that high-effective microorganism microbial inoculum realizes nitrosoation rate and denitrification rates respectively.The present invention passes through
The mutual cooperation of a variety of floras and adaptation to environment, have that good waste water treatment effect, wastewater treatment process be short, at low cost, mistake
Journey is controllable, the characteristics of stable operation can be achieved.
The nitrosation dominant bacteria that aerobic unit of the present invention adds is prepared according to CN201010221166.8 the method, nitrous
The acquisition for changing dominant bacteria includes following three cultivation stages: first stage: the mixed bacterial of enrichment Nitrosomas and Nitromonas obtains
Ammonia nitrogen removal frank is obtained up to 90% or more nitrifying bacteria community；Second stage: using high-temperature cultivation and the side of room temperature culture alternately
Method carries out Nitromonas elutriation, the superiority of Nitrosomas, the alternate culture method of high-temperature cultivation and room temperature culture is gradually increased
It carries out 2~6 times, until nitrosoation rate is transferred to phase III culture when being greater than 50%；Phase III: change dissolved oxygen and pH condition into
The further of row Nitromonas is eluriated and the stability of Nitrosomas is tamed, and until nitrosoation rate is stablized 65% or more, terminates one
The culture in period obtains the flora of nitrococcus dominance, and it is spare then to carry out preservation；Wherein second stage room temperature condition of culture
Are as follows: temperature is 30 DEG C, 1~3mg/L of dissolved oxygen, pH value 7.5, and incubation time is 20 days；The condition of second stage high-temperature cultivation are as follows:
Temperature is 10 DEG C higher than room temperature cultivation temperature, 1~3mg/L of dissolved oxygen, pH value 7.5, and incubation time is 20 days；Described in phase III
Change dissolved oxygen and pH condition refers to every suitable time change dissolved oxygen concentration and pH value control range, total dissolved oxygen concentration
Control is controlled in 1~3mg/L, total pH 7.5~9.0；Change dissolved oxygen and pH item every 12h in phase III incubation
Part, the culture in such a way that dissolved oxygen content and pH step up.
Each bacterial strain involved in the microbial bacterial agent that denitrogenation unit of the present invention adds according to CN102465103,
Side described in CN102465104, CN102465105, CN102465106, CN201110353731.0 and CN201110353742.9
Method is activated and is cultivated, the seed of cultured six kinds of bacterial strains SDN-3, DN-3, FDN-1, FDN-2, FSDN-A and FSDN-C
Liquid is spare after being mixed according to the proportion of 1:1:2:2:5:2.
Effect of the invention is further illustrated below with reference to embodiment.
Embodiment 1
Certain waste water contains a small amount of hydro carbons hard-degraded substance, and average COD concentration is 6500mg/L, average BOD concentration is
150mg/L, average total nitrogen concentration are 500mg/L, pH 7.5.Using anoxic unit-aerobic unit-denitrogenation unit of the invention
Group technology is handled, wherein nitrosation dominant bacteria control nitrosoation rate is added between 75% ~ 80% in aerobic unit, denitrogenation
Unit is that 1200mg/L adds activated sludge first, in accordance with sludge concentration, then according to the 0.5% of handled wastewater volume per hour
Add the above-mentioned microbial inoculum being made of six kinds of bacterial strains.The ratio of aerobic unit effluent recycling to anoxic unit is 30%.Total residence time
It is 24 hours, up to 98% or more, effluent COD concentration is lower than COD removal rate lower than 120mg/L, total nitrogen concentration after treatment
40mg/L, ammonia nitrogen concentration are lower than 15mg/L.
Embodiment 2
Certain waste water contains a small amount of nitrogen-containing heterocycle compound, and average COD concentration is 4500mg/L, average BOD concentration is
120mg/L, average total nitrogen concentration are 200mg/L, pH 7.8.Using anoxic unit-aerobic unit of the present invention-denitrogenation unit group
It closes technique to be handled, wherein aerobic unit adds nitrococcus control nitrosoation rate between 70% ~ 75%, and denitrogenation unit is first
It is that 1800mg/L adds activated sludge according to sludge concentration, is then added according to the 0.4% of handled wastewater volume per hour above-mentioned
The microbial inoculum being made of six kinds of bacterial strains.The ratio of aerobic unit effluent recycling to anoxic unit is 45%.Total residence time is 24 small
When, for COD removal rate up to 97% or more, effluent COD concentration is lower than 35mg/L, ammonia lower than 120mg/L, total nitrogen concentration after treatment
Nitrogen concentration is lower than 15mg/L.
Embodiment 3
Waste water is handled with embodiment 2, the difference is that adding according to the 0.8% of handled wastewater volume per hour
Microbial inoculum described in CN201210130644.3, wherein SDN-3, DN-3, FDN-1, FDN-2, FSDN-C seed liquor are according to 1:1:2:
The ratio of 2:2 mixes.Total residence time is 24 hours, and up to 95% or more, effluent COD concentration is lower than COD removal rate after treatment
120mg/L, total nitrogen concentration are lower than 15mg/L lower than 35mg/L, ammonia nitrogen concentration.
Comparative example 1
Anoxic unit-aerobic unit-denitrogenation unit group technology is equally used to handle the waste water of embodiment 2,
Middle aerobic unit does not add nitrosation dominant bacteria, does not control nitrosoation rate, aerobic unit water outlet is largely nitrate nitrogen, nitre
Rate is greater than 70%, and other conditions are the same as embodiment 2.COD removal rate is up to 88% after treatment, effluent COD concentration 780mg/
L, total nitrogen concentration 80mg/L, ammonia nitrogen concentration are lower than 15mg/L.It can be seen that aerobic unit do not control nitrosoation rate cannot achieve it is useless
The processing up to standard of water.
Comparative example 2
Anoxic unit-aerobic unit-denitrogenation unit group technology is equally used to handle the waste water of embodiment 2,
The reflux ratio of middle aerobic unit is controlled as 60%, 70%, 80%, and other conditions are the same as embodiment 2.COD removal rate after treatment
Greater than 95%, effluent COD concentration is less than 120mg/L, the minimum 60mg/L of total nitrogen concentration, ammonia nitrogen concentration and is lower than 15mg/L.Thus may be used
See, the ratio of aerobic unit effluent recycling to anoxic unit is greater than the range that the present invention is controlled, total in waste water after treatment
Nitrogen concentration is still higher, equally cannot achieve the processing up to standard of waste water.
Claims (10)
1. a kind of processing method of organic wastewater with difficult degradation thereby, it is characterised in that mainly include anoxic unit, aerobic unit and denitrogenation
Unit adds nitrosation dominant bacteria in aerobic unit, controls in nitrified effluent nitrosoation rate 65% ~ 80%, wherein aerobic unit
Water outlet a part is back to anoxic unit, controls reflux ratio 25% ~ 50%, another part enters denitrogenation unit, through denitrogenation unit
It is discharged after processing.
2. according to the method for claim 1, it is characterised in that: the operating condition of anoxic unit is that pH is 7.5 ~ 8.5, DO <
0.2mg/L, temperature are 30 ~ 40 DEG C.
3. according to the method for claim 1, it is characterised in that: the nitrosation dominant bacteria of aerobic unit was only needed in the starting period
It is added when being lower than 65% with water outlet nitrosoation rate.
4. according to the method for claim 1, it is characterised in that: the cultural method of nitrosation dominant bacteria includes following three trainings
The stage of supporting:
First stage: the mixed bacterial of enrichment Nitrosomas and Nitromonas obtains ammonia nitrogen removal frank up to 90% or more nitrifier
Group；
Second stage: using high-temperature cultivation and the method for room temperature culture alternately, Nitromonas elutriation is carried out, nitrous is gradually increased
The alternate culture method of the superiority of sour bacterium, high-temperature cultivation and room temperature culture carries out 2~6 times, until when nitrosoation rate is greater than 50%
It is transferred to phase III culture；Wherein second stage room temperature condition of culture are as follows: temperature is 15~30 DEG C, 0.1~3mg/L of dissolved oxygen,
PH value 6~9, incubation time are 5~30 days；The condition of second stage high-temperature cultivation are as follows: temperature is higher than room temperature cultivation temperature by 2~
20 DEG C, 0.1~3mg/L of dissolved oxygen, pH value 6~9, incubation time is 5~30 days；
Phase III: changing dissolved oxygen and pH condition carries out the further elutriation of Nitromonas and the stability of Nitrosomas is tamed,
Until nitrosoation rate is stablized 65% or more, terminate the culture of a cycle, obtain the flora of nitrococcus dominance, then into
Row preservation is spare；Change dissolved oxygen and pH condition described in phase III, which refer to, changes dissolved oxygen concentration and pH every suitable time
It is worth control range, for total Dissolved Oxygen concentration Control in 0.1~3mg/L, total pH control range is 7.5~9.0；Phase III training
During supporting every 8~change dissolved oxygen and pH condition for 24 hours, the culture in such a way that dissolved oxygen content and pH step up, or
It is cultivated by random alternation condition.
5. according to method described in claim 1 or 3, it is characterised in that: aerobic unit control DO exists in 0.5 ~ 2.5mg/L, pH
8.2 ~ 8.5, temperature is 30 ~ 35 DEG C.
6. according to the method for claim 1, it is characterised in that: the startup stage that goes into operation takes the side that reflux ratio is gradually increased
Formula, specific reflux ratio are needed according to COD:(NO2 --N+NO3 -- N) ratio determine, work as COD:(NO2 --N+NO3 -- N)
It needs to reduce reflux ratio when ratio is less than 25, works as COD:(NO2 --N+NO3 -- N) ratio be greater than 50 when, need to increase reflux
Than the amplitude for reducing and increasing reflux ratio is no more than 20%.
7. according to the method for claim 1, it is characterised in that: add microbial bacterial agent, the microorganism in denitrogenation unit
Microbial inoculum be containing marsh cock Salmonella (Kocuria palustris) FSDN-A, arthrobacterium (Arthrobacter creatinolyticus) FDN-1 and Shui Shi Flavobacterium (Flavobacterium mizutaii) one of FDN-2 or two
Kind, simultaneously containing Paracoccus denitrificans (Paracoccus denitrificans) DN-3 and Methylobacterium
(Methylobacterium phyllosphaeraeOne or both of) SDN-3, five kinds of bacterial strains are respectively in July, 2011
It 14 and is preserved in " China Committee for Culture Collection of Microorganisms's common micro-organisms center " on March 11st, 2010, preservation is compiled
Number be respectively CGMCC NO.5061, CGMCC No.3657, CGMCC No.3659, CGMCC No.3658, CGMCC
No.3660；Or the microbial bacterial agent be containing Staphylococcus cohnis (Staphylococcus cohnii) FSDN-C, section
Bacillus (Arthrobacter creatinolyticus) FDN-1 and Shui Shi Flavobacterium (Flavobacterium mizutaii)
One or both of FDN-2, simultaneously containing Paracoccus denitrificans (Paracoccus denitrificans) DN-3 and methyl bar
Bacterium (Methylobacterium phyllosphaeraeOne or both of) SDN-3, five kinds of bacterial strains were respectively at 2011 7
Months 14 days and it is preserved in " China Committee for Culture Collection of Microorganisms's common micro-organisms center ", preservation on March 11st, 2010
Number is respectively CGMCC NO.5062, CGMCC No.3657, CGMCC No.3659, CGMCC No.3658, CGMCC
No.3660；Dosage is the 0.5% ~ 1.0% of handled wastewater volume per hour.
8. according to the method for claim 1, it is characterised in that: added in denitrogenation unit and contain Methylobacterium simultaneously
(Methylobacterium phyllosphaerae) SDN-3, Paracoccus denitrificans (Paracoccus denitrificans)
DN-3, arthrobacterium (Arthrobacter creatinolyticus) FDN-1, Shui Shi Flavobacterium (Flavobacterium mizutaii) FDN-2, marsh cock Salmonella (Kocuria palustris) FSDN-A and Staphylococcus cohnis
(Staphylococcus cohnii) six kinds of bacterial strains of FSDN-C microbial inoculum, the thallus volume ratios of six kinds of bacterium is 1:1:1 ~ 5:1 ~ 5:1
~ 10:1 ~ 3, six kinds of bacterial strains are preserved in " Chinese microorganism strain preservation pipe respectively on March 11st, 2010 and on July 14th, 2011
Reason committee common micro-organisms center ", deposit number are respectively CGMCC No.3660, CGMCC No.3658, CGMCC
No.3657, CGMCC No.3659, CGMCC NO.5061 and CGMCC NO.5062.
9. according to the method for claim 8, it is characterised in that: microbial inoculum dosage is handled wastewater volume per hour
0.1%~0.5%。
10. according to the method for claim 1, it is characterised in that: denitrogenation unit is according to sludge concentration before microbial inoculum adds
1000 ~ 2000mg/L adds denitrifying activated sludge.
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| CN1116235C (en) * | 2000-11-23 | 2003-07-30 | 中国冶金建设集团鞍山焦化耐火材料设计研究总院 | Process for removing ammoniacal nitrogen from sewage of coking |
| KR100992912B1 (en) * | 2008-11-04 | 2010-11-08 | 유원이엔이 주식회사 | Treatment method of organic waste water |
| CN103936148B (en) * | 2012-12-28 | 2016-08-24 | 上海中信水务产业有限公司 | A kind of constant discharging varying duty SVBR sewage treatment process |
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