CN104944671A - Treatment method for molecular sieve catalyst wastewater - Google Patents
Treatment method for molecular sieve catalyst wastewater Download PDFInfo
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Abstract
The invention discloses a treatment method for molecular sieve catalyst wastewater. The treatment method comprises the following steps: (1) pre-treating the molecular sieve catalyst wastewater; (2) mixing the pre-treated wastewater with other wastewater; (3) carrying out anaerobic hydrolysis on the mixed wastewater; (4) carrying out biological enhancement treatment on the hydrolyzed wastewater by a biological contact oxidation unit and a biological nitrogen removal unit, pouring a heterotrophic nitrification-aerobic denitrification microbial inoculum in the biological contact oxidation unit, and pouring a denitrification microbial inoculum in the biological nitrogen removal unit. The method disclosed by the invention is capable of realizing standard treatment for the molecular sieve catalyst wastewater containing organic amine, and has the advantages of being safe and reliable in process, good in treatment effect, low in running expense, and the like.
Description
Technical field
The invention belongs to environmental engineering technical field of waste water processing, be specifically related to the treatment process producing waste water in a kind of molecular sieve catalyst production process, especially relate to a kind for the treatment of process of the wastewater from molecular sieve catalyzer containing suspended substance, ammonia nitrogen and organic amine.
Background technology
Many oil refining catalysts and ammonium salt or ammoniacal liquor will be used for the preparation of in the process of producing molecular sieve of catalyzer, the waste water that wherein sieve synthesis procedure produces contains silicoaluminate, these materials can not be biochemical, and directly entering biochemical system will affect the treatment effect of microorganism to Conventional pollution.Some molecular sieves use organic amine as template in building-up process, except containing except silicoaluminate, high concentration COD and ammonia nitrogen in the containing wastewater from catalyst therefore discharged, also containing a certain amount of organic amine.Waste water containing organic amine adopts materialization and the biochemical method process combined mostly, and technics comparing is complicated.Organic amine in waste water is degraded to micromolecular organic amine and inorganic nitrogen in biochemical treatment process, therefore usually occurs the phenomenon that ammonia nitrogen concentration raises in biological process, which in turns increases the intractability of catalyst production waste water.If the organic amine in waste water can not thoroughly be removed, the emission request of total nitrogen can not be met.
Domestic and international investigator is more to the Processing Technology Research of Single Pollution thing in containing wastewater from catalyst, the suspended substance produced as process of producing molecular sieve mainly adopts microfiltration membrane and flocculence to process, and ammonia nitrogen mainly adopts biological process, heat pump flash steam formulation and ion exchange method etc.High concentrated organic wastewater mixes with the ratio of molecular sieve processing wastewater in 1:3.5 by Chen Yi etc., by precipitation-flocculation-biological coupling art breading molecular sieve processing wastewater, after ABFT (ABFT) process, waste water indices reaches emission standard.But and the content of total nitrogen in not mentioned water outlet, and flocculation sediment needs to add a large amount of medicaments, and processing cost is higher.CN200810227913.1 discloses a kind for the treatment of process of silicon-containing wastewater, the method can only solve Catalyst Production enterprise molecular sieve workshop and produce the easy gel problem of silicon-dioxide in waste water, be not suitable for processing produce in catalyst production process containing COD(chemical oxygen demand (COD)) and the pollutent waste water such as ammonia nitrogen.CN201010210974.4 discloses a kind for the treatment of for reuse method containing ammonia nitrogen height salt catalyst wastewater, the method adopts the technical process of " acid adjustment+micro-filtration+membrane distillation+crystallisation by cooling ", mainly remove salinity, ammonia nitrogen and the metal ion in waste water, be not suitable for processing the containing wastewater from catalyst containing organic amine.
Biological denitrificaion solves one of comparatively cost-effective method of nitrate pollution.No matter be traditional microorganic adhesion type wastewater treatment structures or high-performance bio film processing system newly developed, if be responsible for the microbial host Autotrophic nitrification bacterium of denitrogenation.The rate of propagation of autotrophic bacteria self is slow, cannot compete with heterotrophic organism in the Sludge System of mixed culture, be difficult to obtain higher biomass, nitrification efficiency is low, causes that autotrophic microorganism denitrification system impact resistance is weak, nitrification is incomplete, nitrogen removal rate is low.So some denitrification microorganisms that are novel, better effects if, as allotrophic nitrobacteria, aerobic denitrifying bacteria, anaerobic ammonium oxidizing bacteria etc. are found in succession.
CN201210130658.5 discloses a kind of denitrogenation method of catalytic cracking catalyst factory effluent, autotrophic bacteria and heterotrophic bacterium is adopted to carry out the enhancement microbiological of advantageous combination as wastewater treatment, and take different input modes, in sewage, add nitrobacteria and denitrification denitrogenation microbial inoculum.CN201210130653.2 discloses a kind of biological denitrification method of high saliferous Catalyst sewage, take active sludge as carrier, by adding nitrobacteria and be that the denitrogenation microbial inoculum of electron acceptor(EA) realizes with nitrite in sewage, high saline sewage treatment temp is 18-40 DEG C, dissolved oxygen is 0.2 ~ 3mg/L, pH is 7.5-8.5.Although above-mentioned patent can realize ammonia nitrogen, the removing of total nitrogen, embody the mainly inorganic nitrogen of total nitrogen in waste water, do not relate to the process containing toxicant waste water such as organic amines.
Therefore, how economical and efficient ground processes the wastewater from molecular sieve catalyzer simultaneously containing organic amine and ammonia nitrogen, particularly how to process the alkaline waste water containing COD, ammonia nitrogen, organic amine and suspended substance produced in catalyst production process, will directly affect the Sustainable development of Catalyst Production enterprise.
Summary of the invention
For the deficiency that prior art exists, the invention provides a kind for the treatment of process of the wastewater from molecular sieve catalyzer containing organic amine.The inventive method can realize the process up to standard containing organic amine molecule sieve catalyst waste water, has the advantages such as process safety is reliable, treatment effect good, working cost is low.
The treatment process of wastewater from molecular sieve catalyzer of the present invention, comprises following content:
(1) wastewater from molecular sieve catalyzer pre-treatment;
(2) pretreated waste water mixes with other waste water;
(3) after mixing, waste water carries out anaerobic hydrolysis;
(4) after hydrolysis, waste water carries out biological reinforced process, comprises bio-contact oxidation unit and biological denitrificaion unit, adds heterotrophic nitrification-aerobic denitrification microbial inoculum at bio-contact oxidation unit, add denitrification microbial inoculum at biological denitrificaion unit.
Wastewater from molecular sieve catalyzer water quality described in the present invention (1) is: COD concentration (Cr method, lower same) be 2.5 ~ 4.0 ten thousand mg/L, BOD concentration is 5000 ~ 10000mg/L, organonitrogen concentration is 2000 ~ 8000mg/L, ammonia nitrogen concentration is 1000 ~ 8000mg/L, pH value 10 ~ 13.6, concentration of suspension is 3000 ~ 5000mg/L.Described pretreatment process mainly adopts lime method, and object is the sial isocolloid removed in the basic conditions in waste water, to alleviate the processing load of subsequent biochemical unit.Dosage is determined according to concentration of suspension, within after pre-treatment, suspended substance is reduced to 500mg/L.
The present invention (2) other waste water described are sanitary sewage and/or trade effluent, and waste water quality is: COD concentration≤200mg/L, ammonia nitrogen concentration≤30mg/L, pH are 5 ~ 7, concentration of suspension≤100mg/L, petroleum-type concentration≤15mg/L.After pre-treatment, the blending ratio of wastewater from molecular sieve catalyzer and other sanitary sewages and/or trade effluent is 1:10 ~ 50.If wastewater pH does not meet the requirement of subsequent step after mixing, need to carry out pH regulator.
The treatment condition of the anaerobic hydrolysis described in the present invention (3) are: control hydraulic detention time is 6 ~ 24h, pH is 5.5 ~ 9.0, and temperature is 20 ~ 30 DEG C.Macromolecular substance is mainly degraded to small molecules by the object of anaerobic hydrolysis can biochemical substances, organic amine is hydrolyzed into small organic molecule and ammonia nitrogen, reduces subsequent biological treatment load.
The Heterotrophic nitrification that bio-contact oxidation unit described in the present invention (4) adds-aerobic denitrification microbial inoculum mainly comprise Methylobacterium (
methylobacterium phyllosphaerae) SDN-3 and Paracoccus denitrificans (
paracoccus denitrificans) one or both in DN-3, simultaneously containing marsh cock Salmonella (
kocuria palustris) FSDN-A and Staphylococcus cohnis (
staphylococcus cohnii) one or both in FSDN-C, four kinds of bacterial strains respectively at being preserved on March 11st, 2010 and on July 14th, 2011 " China Committee for Culture Collection of Microorganisms's common micro-organisms " center "; deposit number is respectively CGMCC No.3660, CGMCC No.3658, CGMCC NO.5061 and CGMCC NO.5062; the thalline volume ratio of two bacteroids is that 1:10 ~ 10:1(is by thalline volumeter; thalline volume is the thalline volume obtained containing bacterium liquid centrifugation 5min under 10,000 turns of conditions of nutrient solution, lower with).Preferably containing Methylobacterium SDN-3 and marsh cock Salmonella FSDN-A, also DN-3 and FSDN-C can be contained.Wherein " Methylobacterium SND-3 and/or Paracoccus denitrificans DN-3 " and " marsh cock Salmonella FSDN-A and/or Staphylococcus cohnis FSDN-C " two bacteroids are mixed with microbial inoculum according to 1:3 ~ 10 and 1 ~ 10:1, two kinds of volume ratios, first " marsh cock Salmonella FSDN-A and/or Staphylococcus cohnis FSDN-C " microbial inoculum that proportion is large is added, when organonitrogen transformation efficiency is greater than 60%, change and throw Methylobacterium SND-3 and/or the large microbial inoculum of Paracoccus denitrificans DN-3 proportion, stop when organonitrogen transformation efficiency reaches more than 90% adding.Can add the additive that nutritive substance and preservation auxiliary agent etc. are suitable in the mixture of above-mentioned thalline, concrete additive types and consumption are well known to those skilled in the art.Need at catalytic oxidation unit according to MLSS(sludge concentration before microbial inoculum adds) be that 1500 ~ 3000mg/L first adds active sludge, concrete operations condition is: temperature is 20 ~ 40 DEG C, and pH is 7 ~ 9, and dissolved oxygen concentration is 2.0 ~ 5.0mg/L.
The microbiobacterial agent of the biological denitrificaion unit inoculation described in the present invention (4) can add according to the microbial inoculum described in CN201210130645.8 or CN201210130644.3.The microbial inoculum added preferably simultaneously containing Paracoccus denitrificans (
paracoccus denitrificans) DN-3, Methylobacterium (
methylobacterium phyllosphaerae) SDN-3, Arthrobacter (
arthrobacter creatinolyticus) FDN-1, Shui Shi Flavobacterium (
flavobacterium mizutaii) FDN-2, marsh cock Salmonella (
kocuria palustris) FSDN-A and Staphylococcus cohnis (
staphylococcus cohnii) FSDN-C six kinds of bacterial strains, respectively at being preserved on March 11st, 2010 and on July 14th, 2011, " China Committee for Culture Collection of Microorganisms's common micro-organisms " center "; deposit number is respectively CGMCC No.3658, CGMCC No.3660, CGMCC No.3657, CGMCC No.3659, CGMCC NO.5061 and CGMCC NO.5062, the thalline volume ratio of six kinds of bacterial strains is 1:1:1 ~ 5:1 ~ 5:1 ~ 10:1 ~ 3 to six kinds of bacterial strains.Needing before microbial inoculum adds at denitrogenation unit according to MLSS is that 1000 ~ 2000mg/L first adds denitrifying activated sludge, and operational condition is: temperature is 20 ~ 40 DEG C, and pH is 7 ~ 9, and dissolved oxygen concentration is 0.5 ~ 1.5mg/L.
The dosage of often kind of microbial inoculum described in the present invention (4) is 0.1% ~ 1.0% of handled wastewater volume per hour.
First the present invention adopts lime method pre-treatment to the containing wastewater from catalyst containing organic amine from molecular sieve production plant, fully mix in equalizing tank with other waste water from plant area after reducing the concentration of suspension such as colloid, then enter hydrolytic tank and carry out macromolecular chain-scission degradation reaction, the water outlet of hydrolytic tank enters aerobic contact oxidation pond and carries out the degraded of COD and the rapid conversion of organic amine, waste water after contact-oxidation pool process enters the denitrogenation of denitrification reaction pond again and removes COD, finally complete the process up to standard of waste water, waste water after process can be arranged directly outward, some return of waste water another to equalizing tank as adjustment water.
The present invention adopts lime method to carry out the pre-treatment of sial pollutent, adopt acidication unit to reduce organic amine to the toxicity of microorganism and improve the biodegradability of waste water, add different biological reinforced microbial inoculums respectively at bio-contact oxidation unit and biological denitrificaion unit, the degree of depth that efficiently can complete denitrogenation and COD is removed.The microbial inoculum that biological contact oxidation pond adds except can removal of ammonia and nitrogen, degraded COD except, the fast decoupled of organic amine can also be promoted, the bio-toxicity of further reduction waste water, promote biomembranous quick formation and can biomembranous stability be improved, ensure system stable operation, the removal of pollutent can be completed when low hydraulic detention time.The inventive method really realizes the process up to standard containing organic amine molecule sieve catalyst waste water, has the advantages such as process safety is reliable, treatment effect good, equipment occupation of land is little, reduced investment, working cost are low.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of process of the present invention containing organic amine molecule sieve catalyst waste water;
Wherein: 1, pretreatment unit; 2, equalizing tank; 3, hydrolytic tank; 4, biological contact oxidation pond; 5, biological denitrificaion pond; I-heterotrophic nitrification-aerobic denitrification microbial inoculum, II-denitrification microbial inoculum.
Embodiment
Below in conjunction with accompanying drawing 1, specific embodiment of the present invention is described, but does not therefore limit the present invention.
First wastewater from molecular sieve catalyzer containing a large amount of suspended substance enters in pretreatment unit 1, adds unslaked lime and carries out pre-treatment, and after process, the concentration of suspended substance is less than 500mg/L.Pretreated waste water fully mixes in equalizing tank 2 with hydrogenation catalyst waste water or sanitary sewage and the waste water that refluxes from denitrification reaction pond, and carries out pH regulator.In mixed waste water, COD concentration is at 1000 ~ 3000mg/L, and organonitrogen concentration is at 50 ~ 500mg/L, and ammonia nitrogen concentration is at 50 ~ 500mg/L.Mixed waste water enters hydrolytic tank 3 and carries out macromole hydrolysis reaction, the B/C of waste water is greater than 0.3, waste water after hydrolysis enters biological contact oxidation pond 4 and carries out the removal of COD and the conversion of organic amine, and heterotrophic nitrification-aerobic denitrification microbial inoculum I is added in biological contact oxidation pond 4, every day adds according to 0.1% ~ 1.0% of handled wastewater volume per hour.After process, COD clearance is greater than 70%, and organonitrogen transformation efficiency is greater than 90%.This part waste water enters biological denitrificaion pond again, and adds the further removal that denitrification microbial inoculum II completes total nitrogen and COD in biological denitrificaion pond 5, finally realizes wastewater to reach standard process.
Each bacterial strain involved in the present invention carries out activating and cultivating according to condition described in CN201210130645.8 or CN201210130644.3, carries out independent amplification culture, then mixes according to the proportioning shown in table 1, and the microbial inoculum obtaining different composition is as shown in table 1.
The composition of often kind, table 1 microbial inoculum and proportioning
Further illustrate process and the effect of the inventive method by the following examples.
embodiment 1
Technical process of the present invention is adopted to process the waste water that certain Catalyst Production enterprise produces in molecular sieve modified process, COD concentration is 25000 ~ 26000mg/L, BOD concentration is 7000 ~ 7500mg/L, organonitrogen concentration is 2000 ~ 2200mg/L, ammonia nitrogen concentration is 6000 ~ 6500mg/L, pH value 10 ~ 11, concentration of suspension is 3000 ~ 3500mg/L.The main experimental device of each processing unit is formed, operational conditions and treatment effect be in table 2.
The main processing units of table 2 embodiment 1 is formed and treatment effect
As shown in Table 2, after the inventive method process, effluent COD concentration is less than 70mg/L, organonitrogen concentration is less than 10mg/L, and ammonia nitrogen concentration is less than 20mg/L, and total nitrogen concentration is less than 25mg/L, and COD, organonitrogen and ammonia nitrogen are obtained for efficient removal.
embodiment 2
Technical process of the present invention is adopted to process the waste water that certain Catalyst Production enterprise produces in molecular sieve modified process, COD concentration is 28000 ~ 29000mg/L, BOD concentration is 5000 ~ 6000mg/L, organonitrogen concentration is 2000 ~ 2500mg/L, ammonia nitrogen concentration is 2500 ~ 3000mg/L, pH value 10 ~ 11.6, concentration of suspension is 3000 ~ 4000mg/L.The main experimental device of each processing unit is formed, operational conditions and treatment effect be in table 3.
The main processing units of table 3 embodiment 2 is formed and treatment effect
As shown in Table 3, after the inventive method process, effluent COD concentration is less than 80mg/L, and organonitrogen concentration is less than 15mg/L, and ammonia nitrogen concentration is less than 20mg/L, and total nitrogen concentration is less than 30mg/L, and COD, organonitrogen and ammonia nitrogen are obtained for efficient removal.
embodiment 3
Technical process of the present invention is adopted to process the waste water that certain Catalyst Production enterprise produces in molecular sieve modified process, COD concentration is 35000 ~ 38000mg/L, BOD concentration is 8000 ~ 9000mg/L, organonitrogen concentration is 6000 ~ 7000mg/L, ammonia nitrogen concentration is 1000 ~ 1500mg/L, pH value 10 ~ 11, concentration of suspension is 4000 ~ 5000mg/L.The main experimental device of each processing unit is formed, operational conditions and treatment effect be in table 4.
The main processing units of table 4 embodiment 3 is formed and treatment effect
As shown in Table 4, after adopting the inventive method process, effluent COD concentration is less than 80mg/L, organonitrogen concentration is less than 25mg/L, and ammonia nitrogen concentration is less than 20mg/L, and total nitrogen concentration is less than 30mg/L, COD, organonitrogen and ammonia nitrogen are obtained for efficient removal, and microbial inoculum dosage reduces.
embodiment 4
Process with the identical waste water of embodiment 3.The operational conditions of other processing units is identical with embodiment 3.The operational conditions in biological contact oxidation pond and biological denitrificaion pond and treatment effect are in table 5.
The main processing units of table 5 embodiment 4 is formed and treatment effect
As shown in Table 5, after adopting aforesaid method process, effluent COD concentration is less than 70mg/L, organonitrogen concentration is less than 10mg/L, and ammonia nitrogen concentration is less than 15mg/L, and total nitrogen concentration is less than 20mg/L, COD, organonitrogen and ammonia nitrogen are obtained for efficient removal, and microbial inoculum dosage reduces.
comparative example 1
Process with the identical waste water of embodiment 3.Other conditions and operating method identical with embodiment 3, difference is: process when bio-contact oxidation unit and biological denitrificaion unit do not add microbial inoculum, treatment effect is in table 6.
comparative example 2
Process with the identical waste water of embodiment 3.Other conditions and operating method identical with embodiment 3, difference is: add microbial inoculum II-A at bio-contact oxidation unit, and add microbial inoculum I-B at biological denitrificaion unit, treatment effect is in table 6.
The treatment effect of table 6 comparative example 1 and comparative example 2
As shown in Table 6, do not add microbial inoculum, after each cell processing, final outflow water ammonia nitrogen and total nitrogen concentration can not reach emission standard.According to treatment process of the present invention, if exchange order of adding process, organonitrogen can not be effectively addressed, and causes total nitrogen concentration not meet discharge index.
Claims (14)
1. a treatment process for wastewater from molecular sieve catalyzer, is characterized in that comprising following content:
(1) wastewater from molecular sieve catalyzer pre-treatment;
(2) pretreated waste water mixes with other waste water;
(3) after mixing, waste water carries out anaerobic hydrolysis;
(4) after hydrolysis, waste water carries out biological reinforced process, comprises bio-contact oxidation unit and biological denitrificaion unit, adds heterotrophic nitrification-aerobic denitrification microbial inoculum at bio-contact oxidation unit, add denitrification microbial inoculum at biological denitrificaion unit.
2. in accordance with the method for claim 1, it is characterized in that: the wastewater from molecular sieve catalyzer water quality described in step (1) is: COD concentration is 2.5 ~ 4.0 ten thousand mg/L, BOD concentration is 5000 ~ 10000mg/L, organonitrogen concentration is 2000 ~ 8000mg/L, ammonia nitrogen concentration is 1000 ~ 8000mg/L, pH value 10 ~ 13.6, concentration of suspension is 3000 ~ 5000mg/L.
3. according to the method described in claim 1 or 2, it is characterized in that: the described pretreatment process of step (1) adopts lime method, within suspended substance is reduced to 500mg/L after pre-treatment.
4. in accordance with the method for claim 1, it is characterized in that: step (2) other waste water described are sanitary sewage and/or trade effluent, and waste water quality is: COD concentration≤200mg/L, ammonia nitrogen concentration≤30mg/L, pH is 5 ~ 7, concentration of suspension≤100mg/L, petroleum-type concentration≤15mg/L.
5. according to the method described in claim 1,2 or 4, it is characterized in that: the blending ratio of step (1) pretreated wastewater from molecular sieve catalyzer and other sanitary sewages and/or trade effluent is 1:10 ~ 50.
6. in accordance with the method for claim 1, it is characterized in that: the treatment condition of step (3) described anaerobic hydrolysis are: control hydraulic detention time is 6 ~ 24h, pH is 5.5 ~ 9.0, and temperature is 20 ~ 30 DEG C.
7. in accordance with the method for claim 1, it is characterized in that: the Heterotrophic nitrification described in step (4)-aerobic denitrification microbial inoculum mainly comprise Methylobacterium (
methylobacterium phyllosphaerae) SDN-3 and Paracoccus denitrificans (
paracoccus denitrificans) one or both in DN-3, simultaneously containing marsh cock Salmonella (
kocuria palustris) FSDN-A and Staphylococcus cohnis (
staphylococcus cohnii) one or both in FSDN-C.
8. in accordance with the method for claim 7, it is characterized in that: " Methylobacterium SND-3 and/or Paracoccus denitrificans DN-3 " is 1:10 ~ 10:1 with the thalline volume ratio of " marsh cock Salmonella FSDN-A and/or Staphylococcus cohnis FSDN-C " two bacteroids.
9. in accordance with the method for claim 8, it is characterized in that: " Methylobacterium SND-3 and/or Paracoccus denitrificans DN-3 " and " marsh cock Salmonella FSDN-A and/or Staphylococcus cohnis FSDN-C " two bacteroids are mixed with microbial inoculum according to 1:3 ~ 10 and 1 ~ 10:1, two kinds of volume ratios, first " marsh cock Salmonella FSDN-A and/or Staphylococcus cohnis FSDN-C " microbial inoculum that proportion is large is added, when organonitrogen transformation efficiency is greater than 60%, change and throw Methylobacterium SND-3 and/or the large microbial inoculum of Paracoccus denitrificans DN-3 proportion, stop when organonitrogen transformation efficiency reaches more than 90% adding.
10. according to the method described in claim 1,7,8 or 9, it is characterized in that: be that 1500 ~ 3000mg/L first adds active sludge at catalytic oxidation unit according to MLSS before microbial inoculum adds, operational condition is: temperature is 20 ~ 40 DEG C, and pH is 7 ~ 9, and dissolved oxygen concentration is 2.0 ~ 5.0mg/L.
11. in accordance with the method for claim 1, it is characterized in that: the denitrification microbial inoculum described in step (4) adds according to the microbial inoculum described in CN201210130645.8 or CN201210130644.3.
12. in accordance with the method for claim 1, it is characterized in that: the denitrification microbial inoculum that step (4) adds simultaneously containing Methylobacterium (
methylobacterium phyllosphaerae) SDN-3, Paracoccus denitrificans (
paracoccus denitrificans) DN-3, Arthrobacter (
arthrobacter creatinolyticus) FDN-1, Shui Shi Flavobacterium (
flavobacterium mizutaii) FDN-2, marsh cock Salmonella (
kocuria palustris) FSDN-A and Staphylococcus cohnis (
staphylococcus cohnii) FSDN-C six kinds of bacterial strains, the thalline volume ratio of six kinds of bacterial strains is 1:1:1 ~ 5:1 ~ 5:1 ~ 10:1 ~ 3.
13. according to the method described in claim 1,12 or 13, it is characterized in that: be that 1000 ~ 2000mg/L first adds active sludge at denitrogenation unit according to MLSS before the described denitrification microbial inoculum of step (4) adds, operational condition is: temperature is 20 ~ 40 DEG C, pH is 7 ~ 9, and dissolved oxygen concentration is 0.5 ~ 1.5mg/L.
14. in accordance with the method for claim 1, it is characterized in that: the dosage of step (4) described often kind of microbial inoculum is 0.1% ~ 1.0% of handled wastewater volume per hour.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108160702A (en) * | 2017-12-18 | 2018-06-15 | 中国科学院沈阳应用生态研究所 | A kind of method for repairing high concentration petroleum pollution salt affected soil |
| CN113651433A (en) * | 2021-09-07 | 2021-11-16 | 恒臻(无锡)生物科技有限公司 | Leather wastewater treatment system and method |
| CN115490330A (en) * | 2022-10-10 | 2022-12-20 | 江苏大学 | Multifunctional modular rural domestic sewage treatment equipment and treatment method |
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| WO2006129132A1 (en) * | 2005-05-31 | 2006-12-07 | Gerasimos Lyberatos | Biological nitrogen removal from wastewater in a sbr reactor without nitrate production |
| CN102583884A (en) * | 2012-02-16 | 2012-07-18 | 北京科技大学 | Method for treating mixed industrial sewage in industrial park |
| CN103373759A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Method for denitrifying wastewater generated in process of producing FCC (fluid catalytic cracking) catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006129132A1 (en) * | 2005-05-31 | 2006-12-07 | Gerasimos Lyberatos | Biological nitrogen removal from wastewater in a sbr reactor without nitrate production |
| CN102583884A (en) * | 2012-02-16 | 2012-07-18 | 北京科技大学 | Method for treating mixed industrial sewage in industrial park |
| CN103373759A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Method for denitrifying wastewater generated in process of producing FCC (fluid catalytic cracking) catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108160702A (en) * | 2017-12-18 | 2018-06-15 | 中国科学院沈阳应用生态研究所 | A kind of method for repairing high concentration petroleum pollution salt affected soil |
| CN108160702B (en) * | 2017-12-18 | 2020-02-21 | 中国科学院沈阳应用生态研究所 | Method for restoring saline-alkali soil polluted by high-concentration petroleum |
| CN113651433A (en) * | 2021-09-07 | 2021-11-16 | 恒臻(无锡)生物科技有限公司 | Leather wastewater treatment system and method |
| CN115490330A (en) * | 2022-10-10 | 2022-12-20 | 江苏大学 | Multifunctional modular rural domestic sewage treatment equipment and treatment method |
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