CN102241459A - Method for reinforcing adsorption-biodegradation (AB) denitrification technology by use of heterotrophic nitrification-aerobic denitrification bacteria - Google Patents
Method for reinforcing adsorption-biodegradation (AB) denitrification technology by use of heterotrophic nitrification-aerobic denitrification bacteria Download PDFInfo
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Abstract
The invention discloses a method for reinforcing an adsorption-biodegradation (AB) denitrification technology by use of heterotrophic nitrification-aerobic denitrification bacteria and belongs to the technical field of water treatment. The method comprises the following specific steps: when the COD (chemical oxygen demand)/N of sewage is more than 8, the sewage passes through a section A and a section B in turn, feeding the effluent of the section A into the section B and inoculating heterotrophic nitrification-aerobic denitrification bacteria into the activated sludge of the section B; and when the COD/N of the sewage is no more than 8, feeding the sewage into the section A and the section B respectively, independently operating the section A and the section B and inoculating the heterotrophic nitrification-aerobic denitrification bacteria into the activated sludge of the section A and the activated sludge of the section B. By adopting the method, the functions of carbon removal and denitrification are realized under the combined action of the section A and the section B in an AB process system and the denitrification effect and efficiency of sewage treatment can be increased.
Description
Technical field
The invention belongs to water-treatment technology field, relate to the method for the biological reinforced denitrogenation of a kind of adsorption biodegradation.
Background technology
The entrained nitrogen of municipal effluent enters the eutrophication that can cause lake, river and ocean environment behind the water body, causes big area red tide or wawter bloom to take place frequently.Denitrogenation of waste water is the difficult problem in the present environmental pollution improvement, and biological denitrificaion is most economical, the most effective means in the denitrogenation of waste water processing of generally acknowledging at present.AB method sewage treatment process (biological adsorption and oxidation method) is at one of most widely used sewage treatment process of the old sewage work of China.China is from the nineties, built up Qingdao Hai Bohe sewage work, Tai'an sewage work, Zibo sewage work, the east of a river, Urumqi City sewage work, Teng Zhou city sewage work and Shenzhen Luo Fang sewage work, adsorption biodegradation treatment plants such as moral sewage work are hunted in Guangdong.
The seventies in 20th century, professor B.Bohnke by Germany RWTH proposed AB method sewage treatment process, and promptly biological adsorption and oxidation method is based in two sections activated sludge processes (preliminary sedimentation tank+active sludge aeration tank) and high loading activated sludge process.Tradition adsorption biodegradation sewage disposal flow process is seen accompanying drawing 1.The A section is an adsorption stage among the figure, and the A pond is an adsorption tank, and the B section is biological oxidation panel, and the B pond is a bio-oxidation pond.
Adsorption biodegradation is divided into A section (adsorption stage) and B section (biological degradation section), and sewage directly enters the A section by urban drainage pipe network through grid and settling pit, and this section sludge loading is very high, and mud is short age, and hydraulic detention time is very short, is about 30 minutes; B section sludge loading is lower, and the residence time is about 2-6h, mud 15-20d in age.
Adsorption biodegradation has advantage: the first, and the dominant microflora of A section is the strong prokaryotic organism of capacity of resisting impact load, and its generation time is very short, and reproduction speed is very high, by the flocculation adsorption of biological sludge, makes the operating load of B section reduce 40-70%; The second, the B section is born lower, stable pollutant load.Because the A section is to the tangible buffering of the change in concentration of raw waste water, the shock effect of required pollutent that bears of B section and toxic substance reduces, and has guaranteed the biodegradability of B section and the decontamination effect improving of sewage work.In a word, the effective efficiency of A section is improved the treatment effect of B section, can further reduce the biochemical oxygen demand (BOD) (BOD) and the chemical oxygen demand (COD) (COD) of sewage, and certain nitrification effect is arranged.For water quality complicated and that variation is big, wool spinning waste water (Wu Jixiu for example, 2002. handle wool spinning waste water with improving adsorption biodegradation. pollution prevention technique, 15,39-41.), acetic acid wastewater from chemical industry (Zhou Gang, Ceng Wenyong, fourth is founded the state, and the 2007.AB art breading contains the research of acetic acid wastewater from chemical industry. Treatment of Industrial Water, 27,78-79.), wastewater containing sulfur compound (field hundred barges, the technical measures of sulfocompound during 2007. employing adsorption biodegradation are disposed of sewage. environmental science, 27,56-58.), food processing wastewater (Sun Yingxue, Wu Fuping, Xu Dong, 2004. air supportings-adsorption biodegradation is handled food processing wastewater. process water and waste water, 35,68-69.) etc. multiple complicated waste water, therefore adsorption biodegradation has very strong adaptive faculty, has obtained in early days using widely.
But there are many weak points in adsorption biodegradation: (1) lacks the environment of efficient denitrification.Traditional biological denitrification process carries out nitrification and denitrification respectively usually at aerobic zone and oxygen-starved area, form classification nitration denitrification technology, therefore must build nitrification tank and denitrification pond respectively, and adsorption biodegradation lacks the anaerobic denitrifying pond, therefore do not possess the denitrogenation ability substantially; (2) biological oxidation of B section aeration tank, play a major role for biological denitrificaion, the residence time is 2～6h, and traditional nitrifying bacteria community rate of propagation is slow, and generation time is long, is difficult to keep higher biological concentration, needs to select long system's hydraulic detention time, organic loading is low, handles the water yield and is subjected to certain restriction; (3) since the A section remove and to the limited removal of nitrogen for BOD is efficient, enter that carbon/nitrogen compared low in the sewage of B section biodegrade, denitrifying bacterium will have carbon source as electron donor, then need add organic carbons such as methyl alcohol, this has not only increased working cost, has also increased the difficulty of operational management and subsequent disposal; (4) nitrogen removal rate is difficult to reach the above water outlet requirement of one-level A.Newly-built sewage work takes up an area of bigger, and sewage work's upgrading is subjected to the restriction of soil space.
The GB18918-2002 that China announced in 2002, new standard improves the original emission standard of sewage work, and regulation total nitrogen emission standard is brought up to the 15mg/L of one-level A standard from the 20mg/L of one-level B standard; Ammonia nitrogen has been brought up to 5 (8) mg/L from 8 (15) mg/L.The adsorption biodegradation sewage work that major part has been built up can not satisfy new emission request, becomes a technical problem of being badly in need of solution.
Summary of the invention
The present invention discloses a kind of method of utilizing the heterotrophic nitrification-aerobic denitrification bacterium to strengthen the adsorption biodegradation denitrogenation: when COD of sewage/N＞8, sewage is successively by A section and B section, the water outlet of A section enters the B section, inoculation heterotrophic nitrification-aerobic denitrification bacterium in the active sludge of B section; When COD of sewage/N≤8, sewage is respectively by A section and B section, A section and B section independent operating, in the active sludge of A section and B section, all inoculate different oxygen nitrated-aerobic denitrifying bacteria.
A section and B section comprise respectively: aeration tank and settling tank, the inner active sludge that loads in described aeration tank.
Described A section and B section independent operating, specifically: a water inlet pipe that surmounts the A level is set, makes sewage directly enter the B level without the processing of A level and handle; Be provided with a rising pipe that surmounts the B level simultaneously, make sewage through after the A level without the direct water outlet of B level.
The heterotrophic nitrification-aerobic denitrification bacterium of being adopted is PCN series microniological proudcts (by Peking University's development and sale).
The amount of PCN series microniological proudcts accounts for more than 0.15% (mass percent) of mud in the aeration tank.
The object of the invention is to remedy the weak point that exists in the existing adsorption biodegradation, and provides a kind of adsorption biodegradation and heterotrophic nitrification-aerobic denitrification bacterium to combine the method for wastewater treatment of strengthened denitrification.
Technical scheme of the present invention is: employing be adsorption biodegradation, the inner active sludge that loads in aeration tank in the total system adds the heterotrophic nitrification-aerobic denitrification bacterium as required in the aeration tank, the synergy by A section and B section realizes strengthening carbon and nitrogen removal; The step that comprises following order:
Biological adsorption stage (A section) is handled: waste water passes through adsorption stage aeration tank and settling tank in proper order.Bacterium mainly plays the flocculation adsorption in the A section aeration tank, catches and absorption degradation by efficient absorption, flocculation, precipitation net to pollution substance, can remove the COD up to 50%～70%.The high sludge yield of A section and strong adsorptive power can be removed heavy metal and some hard-degraded substances by spoil disposal in addition.In addition, the A section also has capacity of resisting impact load strong and improve the characteristics of water outlet biodegradability, and waste water provides favourable condition through the performance that is treated to the effect of B section heterotrophic nitrification-aerobic denitrification of A section.
Bio-oxidation section (B section) is handled: utilize different oxygen nitrated-aerobic denitrifying bacteria improves the mud performance, the water outlet of A section enters B section (bio-oxidation section), have only in the B section and realize nitration denitrification simultaneously under the condition of aerobic environment, remove organonitrogen and/or inorganic nitrogen, organism is removed under the effect of heterotrophic microorganism simultaneously, realizes the reinforcement of adsorption biodegradation nitrogen removal performance thus.
The method of the reinforcement adsorption biodegradation nitrogen removal performance that the present invention proposes, on the basis of traditional adsorption biodegradation waste disposal plant, be provided with a water inlet pipe that surmounts the A level again, making sewage directly enter the B level without the processing of A level handles, be provided with a rising pipe that surmounts the B level simultaneously, make sewage can through after the A level without the direct water outlet of B level.Accompanying drawing 2 is system schematic of the present invention.The A pond is an adsorption tank among the figure, and the B pond is a bio-oxidation pond.
Therefore the present invention can realize the optimal effectiveness of strengthened denitrification according to the operation scheme of the different appropriate change adsorption biodegradation of handled waste water quality under most economical condition.It is characterized in that when handling high sludge loading (COD/N＞8), under the situation of industrial sewage such as difficult degradation or toxic substance and/or town sewage, sewage passes through A pond and B pond in proper order, utilize the function of the toxin immunity and the anti-shock loading in A pond, make the impact load of B section obtain buffering, guarantee the heterotrophic nitrification-aerobic denitrification effect in B pond, realize the purpose of strengthened denitrification.Be on the other hand when handling the low town sewage (COD/N≤8) of sludge loading, but adsorption biodegradation A section and B section independent operating.Part sewage is handled through the A section, and B section aeration tank is crossed in water outlet and settling tank directly leads to B section settling tank water outlet, and another part sewage leap A section aeration tank and settling tank directly lead to B section aeration tank to be handled.According to the treatment capacity in water quality regulation A pond, all inoculate in the active sludge in A pond and B pond different oxygen nitrated-aerobic denitrifying bacteria, can guarantee the denitrogenation target, can improve at least 13% day output again.
The present invention does not need existing utility is transformed, and does not need newly to account for land resources, need not increase under the condition of new energy consumption, realizes the purpose of adsorption biodegradation strengthened denitrification.
The present invention improves the mud performance owing to utilize the heterotrophic nitrification-aerobic denitrification bacterium in adsorption biodegradation, has realized the purpose of adsorption biodegradation system carbon and nitrogen removal, and the biological phosphate-eliminating performance also is improved simultaneously.
The different oxygen that the present invention uses is nitrated-and aerobic denitrifying bacteria can be any bacterium with following feature: and (1) has the heterotrophic nitrification function, can carry out heterotrophic nitrification to the organic or inorganic nitrogen compound, be easy to cultivate, propagation is very fast, the substrate utilization scope is wide, but in the wastewater biological denitrificaion system stable existence and fast breeding; (2) have the aerobic denitrification function, can under aerobic conditions, inorganic nitrogen is converted into gaseous nitrogen and remove aqueous solution system, thereby reach denitrification effect; (3) can in denitrogenation, reduce the chemical oxygen demand (COD) (COD) in the waste water.For example: edaphic bacillus (Agrobacterium sp.), Paracoccus denitrificans (Paracoccus pantotropha), Alcaligenes (Alcaligenes faecalis), genus bacillus (Bacillus sp.) etc.
Different oxygen of the present invention is nitrated-aerobic denitrifying bacteria, and the PCN series microniological proudcts that are preferably Peking University's research and development and sell.
The inventive method is compared existing adsorption biodegradation and had following advantage: (1) the present invention utilizes the heterotrophic nitrification-aerobic denitrification bacterium to improve the mud performance of adsorption biodegradation, brought into play the collaborative denitrogenation de-carbon effect of adsorption biodegradation A section and B section, solve the defective of adsorption biodegradation shortage deep denitrogenation process, reached the purpose of strengthened denitrification; (2) the present invention uses heterotrophic nitrification aerobic denitrifying bacteria, compares with the autotrophy nitrobacteria, and the growth velocity of allotrophic nitrobacteria is fast, cell yield is high, can effectively solve the problem that the increment of autotrophy nitrobacteria is slow, system's hydraulic detention time is long; (3) the present invention brings into play the effect that improves the water outlet biodegradability in A pond in the adsorption biodegradation, effectively reduces the requirement of COD/N ratio in the denitrification process of B pond, and the nitric efficiency of system can be improved under low COD/N condition; When (3) the present invention is used to handle high loading and/or contains the waste water of Toxic matter, the advantage of having possessed original adsorption biodegradation, brought into play the advantage such as anti impulsion load, resistance to poison in A pond, guaranteed that the heterotrophic nitrification-aerobic denitrification bacterium is to the performance of the improvement effect of mud performance in the B section aeration tank, realize while nitration denitrification under aerobic condition, strengthened the whole nitrogen removal performance of adsorption biodegradation; (4) the present invention handle the water inlet sludge loading lower, during the big sewage of the water yield, be provided with the mode of A section and B section independent operating (A section and the parallel running of B section), both solved carbon source and can't satisfy the problem of order by A section and B section operation design requirements, guarantee the target of strengthened denitrification, improved at least 13% day output again; (5) the present invention need not existing adsorption biodegradation sewage work is transformed, and need not to build anoxic pond for deep denitrogenation process and newly accounts for land resources, can realize the target of energy-saving and emission-reduction.(6) the present invention is when obtaining the strengthened denitrification target, because the heterotrophic nitrification-aerobic denitrification bacterium has also been improved the ability of dephosphorization to the improvement effect of mud performance.
Description of drawings
Fig. 1: traditional adsorption biodegradation sewage disposal sewage simplified schematic diagram;
Fig. 2: adsorption biodegradation strengthened denitrification treatment system simplified schematic diagram of the present invention;
Fig. 3: adsorption biodegradation device synoptic diagram of the present invention, A pond are A section aeration tank, and the B pond is B section aeration tank.
Embodiment
Describe the present invention below in conjunction with embodiment.Persons of ordinary skill in the art may appreciate that embodiment only is illustrational purpose, scope of the present invention is not exceeded with specific implementation method, but is limited by the scope of claim.
In following specific embodiment, the water quality situation of used waste water is as follows, and any material is formed and the waste water of concentration but enforcement of the present invention is not limited to.
Simulated domestic wastewater: every L waste water 0.18g NaHCO
3, 0.2g NH
4Cl, 0.044gKH
2PO
4, 0.051g MgSO
47H
2O, 0.3gCaCl
22H
2O, 0.00625g FeSO
47H
2O, with the tap water preparation, TN concentration is about 45mg/L, and carbon source is a glucose, changes C/N (COD/TN) ratio of water inlet in the experimentation, and it is 2,4,6,8,10,12,14 that theory is provided with C/N, promptly increases the content of glucose.
Embodiment 1:
Present embodiment is to carry out control experiment with the inventive method and common AB sewage water treatment method.Reaction unit 1 is for using the adsorption biodegradation reaction unit of PCN series microbial augmentation, and reaction unit 2 is the reaction unit of common adsorption biodegradation.
All reactors of adsorption biodegradation are synthetic glass and process, and see shown in Figure 3ly, and the designing treatment water yield is 50L/d, and A section aeration tank useful volume is 0.8L, and the design hydraulic detention time is 0.5h; B section aeration tank is designed for 3.3h by hydraulic detention time, and corresponding useful volume is 7L; A section settling tank is identical with B section settling tank structure, is vertical sedimentation basin, and A section settling tank useful volume is 3.5L, and the residence time is 1.7h.The design hydraulic detention time of B section settling tank is 3.6h, and useful volume is 7.5L, and structure is with A section settling tank.
Aerobic sludge is all loaded in reaction unit 1 and 2 A section aeration tank and B section aeration tank, and experiment, is directly loaded in the B section aeration tank from active sludge in Langfang economic and technological development zone Sewage Plant aeration tank with mud.To adsorption biodegradation intake continuously (COD/N=8 water quality is intake continuously), the B section is spoil disposal every other day, A section spoil disposal every day, time is 9:30-10:00 in evening, and the A section is the alimentation of simulated sewage biology and suspended solids, gets the mud in the water drain of Langfang, filter oarse-grained impurity, tame this mud with simulated sewage, place bucket to stir standby (sludge concentration is approximately 4.5g/L), 8:00-9:00 take a sample and added 50mL afterwards and enter A section aeration tank every morning.Regulate sludge concentration in two sections aeration tanks of A, B be respectively 5.0 and 3.5g/L about.Move continuously with this understanding about a week, until stable water outlet, so that carry out follow-up experiment.Adopt dissolved oxygen meter that dissolved oxygen (DO) is monitored, keeping DO value A section aeration tank is 0.5～0.8g/L, and B section aeration tank is 2.5～3.5g/L; Return sludge ratio is 80%; Temperature is set according to room temperature.The AB aeration tank is intake (COD/N=8 water quality is intake continuously) continuously, move a week under this condition continuously, until the clearance that obtains stable COD, ammonia nitrogen and total nitrogen.
The operation steps of utilizing the serial microorganism of PCN to improve the mud performance is as follows: No. 1 reaction unit and No. 2 reaction units stop into water, vexed about 24h that exposes to the sun.Inoculation PCN series microorganism in No. 1 reaction unit (inoculum size account for mud total amount 0.2%).Vexed 24h and the active sludge thorough mixing of exposing to the sun.Latter two reaction unit of 24h is all intake continuously and is handled the C/N=8 simulated domestic wastewater, design flooding quantity 50L/d.Move about 5 days, make PCN series microorganism have the competent time that the mud performance is improved.Do not inoculate PCN series microorganism in the active sludge of No. 2 reaction units, as blank reference.
Treat that PCN series microorganism improved the mud performance of No. 1 reaction unit, after two reaction unit effluent qualities are all stable, water inlet operation continuously.Investigate water inlet COD concentration and be respectively 90mg/L, 180mg/L, 270mg/L, 360mg/L, 450mg/L, 540mg/L and 630mg/L, waste water nitrogen, organic removal ability when TN concentration is 45mg/L.Sustained periods of time is respectively d1～7, d8～15, d16～23, d24～31, d32～39, d40～47, d48～55.Every morning the 8:00-9:00 sampling and measuring.
The wastewater treatment efficiency of two reaction units is shown in Table 2, and than under the condition, No. 1 reaction unit all is better than reaction unit No. 2 to the treatment effect of total nitrogen at various COD/N.Explanation is inoculated the heterotrophic nitrification-aerobic denitrification bacterium sewage treatment effect is had greatly improved in B section aeration tank.In C/N 〉=8 o'clock, water outlet ammonia nitrogen, total nitrogen and COD reach the one-level A standard of " urban wastewater treatment firm pollutant emission standard ": ammonia nitrogen＜5mg/L, total nitrogen＜15mg/L; Water outlet COD is stabilized in below the 50mg/L, and the treatment effect of TP also is better than reaction unit No. 2.And because the shock absorption that the A section plays for high loading, the B section sludge settling and the stability of two reaction units are all kept well.
Table 1 the inventive method is to the treatment effect and the contrast of common adsorption biodegradation of different carbon-nitrogen ratio simulated domestic wastewaters
Table 1 (continuing)
Annotate: the water outlet of No. 1 reaction unit is represented in 1 water outlet; The water outlet of No. 2 reaction units is represented in 2 water outlets
Embodiment 2:
Further specified in conjunction with Fig. 3 and 2 couples of the present invention of embodiment.Active sludge is all loaded in the A section of reaction unit 1 and B section aeration tank.Adopt dissolved oxygen meter that dissolved oxygen (DO) is monitored, keeping DO value A section aeration tank is 1.5～2.5g/L, and B section aeration tank is 2.5～3.5g/L, consistent among all the other operational conditionss and the embodiment 1.By regulating A section and the B section independent operating that water pipe makes technology, the A section water yield is 6.5L/d, and the residence time is 3h, and the B section water yield is 50L/d, and the residence time is 3.3h.Reaction unit 2 is according to the 1 device active sludge of reaction unit among the embodiment 1.It is 6 simulated domestic wastewater that reaction unit 1 and 2 is all handled COD/N continuously, until the clearance that obtains stable COD, ammonia nitrogen and total nitrogen.Account for 0.2% of mud total amount according to inoculum size then, in the A of reaction unit 1 section and B section, and the B section of reaction unit 2 inoculation PCN series microorganism, add the vexed 24h of exposing to the sun in back.Beginning continuously water inlet then, to handle COD/N be 6 simulated domestic wastewater.Continuously operation 7 days the results are shown in Table shown in 2.
Table 2 the inventive method A section B section independent operating and the inventive method tradition operation scheme are to the treatment effect of simulated domestic wastewater
Table 2 (continuing)
Annotate: the water outlet of No. 1 reaction unit is represented in 1 water outlet, i.e. the water outlet of adsorption biodegradation parallel running; The water outlet of No. 2 reaction units is represented in 2 water outlets, and promptly PCN series microbial augmentation adsorption biodegradation passes through the water outlet of A section and B section operation in proper order.
As can be seen from Table 2, the lower situation of water inlet organic loading, the inventive method independent operating A section and B section are than the operation scheme of passing through the AB section successively, water outlet TN and TP clearance have remarkable advantages, reaction unit 1 water outlet total nitrogen concentration is between 9～15mg/L, TP is between 0.5～1mg/L, and the total nitrogen of reaction unit 2 is between 15～20mg/L, and TP is between 1.5～2.25mg/L.Reason is during successively by two sections of AB operation, enters the COD/N average out to 3.27 of B section, and the COD/N that enters reactor during independent operating is 6.Method by independent operating can solve the problem that carbon source does not satisfy the adsorption biodegradation design requirements to a certain extent, has also strengthened the treatment capacity of sewage simultaneously, has brought up to 56.5L/d by original 50L/d in the experiment, and a day processing water yield has improved 13%.Simultaneously, detected the effluent quality of A section during A section B section independent operating, be more or less the same, therefore can suitably strengthen the processing water yield of A section, utilized the diluting effect of B section to guarantee that water outlet TN is up to standard, handled the water yield and can further strengthen with the water quality of B section.
Claims (6)
1. method of utilizing the heterotrophic nitrification-aerobic denitrification bacterium to strengthen the adsorption biodegradation denitrogenation, it is characterized in that when COD of sewage/N＞8, sewage is successively by A section and B section, the water outlet of A section enters the B section, inoculation heterotrophic nitrification-aerobic denitrification bacterium in the active sludge of B section; When COD of sewage/N≤8, sewage is respectively by A section and B section, A section and B section independent operating, in the active sludge of A section and B section, all inoculate different oxygen nitrated-aerobic denitrifying bacteria.
2. the method for claim 1 is characterized in that, A section and B section comprise respectively: aeration tank and settling tank, the inner active sludge that loads in described aeration tank.
3. the method for claim 1 is characterized in that, described A section and B section independent operating, specifically: a water inlet pipe that surmounts the A level is set, makes sewage directly enter the B level without the processing of A level and handle; Be provided with a rising pipe that surmounts the B level simultaneously, make sewage through after the A level without the direct water outlet of B level.
4. method according to claim 1, it is characterized in that, the heterotrophic nitrification-aerobic denitrification bacterium of being adopted is edaphic bacillus (Agrobacterium sp.), Paracoccus denitrificans (Paracoccus pantotropha), Alcaligenes (Alcaligenesfaecalis), genus bacillus (Bacillus sp.).
5. method according to claim 1 is characterized in that, the heterotrophic nitrification-aerobic denitrification bacterium of being adopted is PCN series microniological proudcts.
6. method according to claim 4 is characterized in that, the amount of PCN series microniological proudcts accounts for more than 0.15% of mud in the aeration.
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| CN103373768A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Method for reducing biological slime in circulating water system |
| CN103373763A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Denitrification method of wastewater generated in process of producing catalytic cracking catalysts |
| CN103373762A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Biological denitrification method for salt-containing sewage |
| CN106315851A (en) * | 2016-09-21 | 2017-01-11 | 同济大学 | Synergic denitrification technology of heterotrophic nitrification and aerobic denitrification bacteria and ammonia oxidizing bacteria |
| CN106698684A (en) * | 2017-03-10 | 2017-05-24 | 北京工业大学 | Culturing method for realizing aerobic denitrification of flocculent activated sludge |
| CN111675332A (en) * | 2020-06-15 | 2020-09-18 | 成都信息工程大学 | Method for treating sewage |
| CN115367961A (en) * | 2022-10-18 | 2022-11-22 | 苏州迪沃特环境科技有限公司 | AB method sewage treatment clarification plant |
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| CN103373761A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Method for treating industrial circulating water |
| CN103373768A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Method for reducing biological slime in circulating water system |
| CN103373763A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Denitrification method of wastewater generated in process of producing catalytic cracking catalysts |
| CN103373762A (en) * | 2012-04-29 | 2013-10-30 | 中国石油化工股份有限公司 | Biological denitrification method for salt-containing sewage |
| CN103373763B (en) * | 2012-04-29 | 2014-12-31 | 中国石油化工股份有限公司 | Denitrification method of wastewater generated in process of producing catalytic cracking catalysts |
| CN103373761B (en) * | 2012-04-29 | 2014-12-31 | 中国石油化工股份有限公司 | Method for treating industrial circulating water |
| CN106315851A (en) * | 2016-09-21 | 2017-01-11 | 同济大学 | Synergic denitrification technology of heterotrophic nitrification and aerobic denitrification bacteria and ammonia oxidizing bacteria |
| CN106698684A (en) * | 2017-03-10 | 2017-05-24 | 北京工业大学 | Culturing method for realizing aerobic denitrification of flocculent activated sludge |
| CN111675332A (en) * | 2020-06-15 | 2020-09-18 | 成都信息工程大学 | Method for treating sewage |
| CN115367961A (en) * | 2022-10-18 | 2022-11-22 | 苏州迪沃特环境科技有限公司 | AB method sewage treatment clarification plant |
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| CN102241459B (en) | 2012-10-10 |
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