CN105621608A - Printing and dyeing wastewater autotrophic denitrification device and method - Google Patents
Printing and dyeing wastewater autotrophic denitrification device and method Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention provides a printing and dyeing wastewater autotrophic denitrification device and a method, belonging to the technical field of printing and dyeing wastewater treatment. By autotrophic denitrifying bacteria, reduced sulfur and iron are used as electron donors to remove NO in water3 -Reduction of-N to N2Realize denitrification. The invention has the advantages of high denitrification efficiency and small pH change of effluent water by combined filling of the pyrite and the sulfur and optimized proportioning. Meanwhile, the method has the advantages of high starting speed, no need of sludge inoculation, long backwashing period and the like. The invention can adopt the operation when the TN exceeds standard according to the condition of the secondary effluent TN of the printing and dyeing wastewater treatment plant, the operation is stopped when the TN reaches the standard, and the secondary effluent directly crosses the invention and enters the next treatment unit or is directly discharged, thereby having the advantages of flexible operation mode and low operation cost.
Description
Technical field
The present invention relates to techniques of Dyeing Wastewater Treatment field, refer to a kind of dyeing waste water autotrophic denitrification nitrogen rejection facility and method especially.
Background technology
Textile printing and dyeing is one of key industry of industrial pollution control and water saving. Textile printing and dyeing wastewater accounts for the 8% of whole nation industrial wastewater discharge total amount, and wherein chemical oxygen demand (COD) (COD), the nitrogen discharged amount of ammonia account for the heavy polluted industry that 9% and the 3% of whole nation industrial discharge total amount is rank the 4th. Printing and dyeing are textile product post-treatment operations, be textile industry adapt to and meet consume, the key of economic benefit of getting the market in gear, increase, but printing and dyeing are also textile industries pollutes the heaviest operation, wastewater discharge accounts for the 60-80% of industry wastewater emission amount, is impact and the key link of restriction Development of Textile Industry.
Along with the fast development that China is economic in recent years, water environment pollution situation is increasingly serious, and textile printing and dyeing industry water prevention and cure of pollution are proposed requirements at the higher level by country. " dyeing entry criteria (revised edition in 2010) " specifies, by 2015, unit industrial added value wastewater discharge reduced by 30% than 2010, and discharge of major pollutant amount declined 10% than 2010. " textile dyeing and finishing industrial water pollution thing emission standard " (GB4287-2012) of new revision not only increases all kinds of pollutant emission limit, and unit product water displacement is proposed stricter requirement. Jiangsu Province took the lead at whole nation implementation standard upgrading in 2005, TAI HU AREA printing and dyeing enterprise COD emission standard is promoted to country's I grade standard by original national II grade standard, performs Jiangsu Province's provincial standard " textile dyeing and finishing industrial water pollution thing emission standard " (DB32/670-2004). In September, 2007, Jiangsu Province has issued and implemented again " TAI HU AREA urban wastewater treatment firm and the main water pollutant emission limit of priority industry industry " (DB32/T1072-2007), regulation was from 1 day January in 2008, the six big industry wastewater discharge standards such as the urban wastewater treatment firm of raising Taihu Lake basin, textile dyeing and finishing industry, rise to 50mg/L and 15mg/L respectively by Dyeing & Finishing Industry waste water COD and TN emission standard further. After new standard is issued and implemented, treatment of dyeing wastewater factory reduces due to water inlet organic loading, causes denitrifying carbon source not enough, it is difficult to realize TN qualified discharge.
Autotrophic denitrification have sludge yield few, paid close attention to widely without the need to the advantage such as additional carbon, running cost is low. Sulphur, iron combination autotrophic denitrification has that denitrification rate is fast, water outlet pH changes the advantages such as little, operating mode is stable and sludge yield is low, and ferric sufide and brenstone price cheap, be easy to obtain, relatively hydrogen autotrophic denitrification use and in transport etc. safer and convenient, therefore there is wide market application foreground.
Summary of the invention
The present invention is directed to the problem that treatment of dyeing wastewater factory causes water outlet TN to exceed standard because of heterotrophic denitrification carbon source deficiency, it is provided that a kind of dyeing waste water autotrophic denitrification nitrogen rejection facility and method. this device comprises water inlet pipe, water intaking valve, surmount pipe, surmount pipe valve, back flushing water inlet pipe, back flushing water intaking valve, back flushing intake pump, blow-down pipe, blow-off valve, rising pipe, outlet valve, back flushing outlet valve, back flushing rising pipe and reactor body, wherein, back flushing water inlet pipe is connected to bottom reactor body, blow-down pipe is connected to bottom, reactor body side, water inlet pipe is connected with back flushing water inlet pipe, make the water in water inlet pipe and back flushing water inlet pipe by entering reactor body bottom reactor body, rising pipe and back flushing rising pipe are connected to reactor body top, surmounting pipe is connected on water inlet pipe, surmounts the upper setting of pipe and surmounts pipe valve, and water intaking valve is arranged on water inlet pipe, and water intaking valve is surmounting pipe and between water inlet pipe junction and reactor body and water inlet pipe junction, installation of relief valve on blow-down pipe, back flushing water inlet pipe arranges back flushing water intaking valve, back flushing intake pump is set between back flushing water intaking valve and reactor body, rising pipe sets out water valve, back flushing rising pipe arranges back flushing outlet valve, in reactor body under filter plate is up set successively and strainer head, sulfurous iron ore packing layer and sulphur packing layer, filter plate and strainer head for supporting filler and realize water distribution uniformity. .
This device is taking treatment of dyeing wastewater factory secondary effluent as handling object, and reactor body external form is the biochemical reactor of a right cylinder. Sulphur packing layer top accounts for the 10% of reactor body height apart from the distance of reactor body water outlet. The volume ratio of sulfurous iron ore packing layer and sulphur packing layer is 1:5. Sulfurous iron ore packing layer packing material size is 3��5mm, and sulphur content is greater than 48%, and iron level is greater than 43%; Sulphur packing layer packing material size is 3��5mm, and sulphur content is greater than 95%.
This device is adopted to carry out the method for denitrification denitrogenation and principle is:
When treatment of dyeing wastewater factory secondary effluent TN is up to standard, close water intaking valve, back flushing water intaking valve and blow-off valve, open to surmount and pipe surmounts pipe valve, by surmounting, the direct autotrophic denitrification nitrogen rejection facility of crossing over of pipe enters next processing unit or direct outer row to current, autotrophic denitrification device is in idle state, to reduce working cost;
When treatment of dyeing wastewater factory secondary effluent TN exceeds standard, stopping device surmounts pipe valve, back flushing water intaking valve, back flushing outlet valve and blow-off valve, open water intaking valve and water outlet pipe valve, secondary effluent enters reactor body by water inlet pipe, the water inlet entering reactor body is first by entering sulfurous iron ore packing layer after filter plate and strainer head uniform water distribution, the thiobacillus denitrificans being attached to sulfurous iron ore filling surface taking the reduced sulfur in sulfurous iron ore as electron donor, by the NO in sewage3 --N is reduced into N2Realize denitrogenation, reduced sulfur is oxidized to SO simultaneously4 2-. Iron in sulfurous iron ore is with Fe2+Form stripping, utilized by iron autotrophic denitrification bacterium, by the NO in sewage3 --N is reduced into N2Realize denitrogenation, simultaneously by Fe2+It is oxidized to Fe3+��Fe3+The sewage of neutrality is hydrolyzed into Fe (OH)3, at Fe (OH)3Coagulating sedimentation effect under can remove the SS in sewage, colourity and organism further. The reaction formula of the autotrophic denitrification denitrogenation using sulfurous iron ore as electron donor is as follows:
6NO3 -+2FeS2+4H2O��3N2+4SO4 2-+2Fe(OH)3+2H+
Then enter sulphur packing layer through the sewage of sulfurous iron ore packing layer, it is electron donor by the thiobacillus denitrificans that is attached to filling surface taking sulphur, de-except remaining NO in sewage further3--N, ensures that TN is up to standard. Thiobacillus denitrificans removes NO de-3--While N, sulphur is oxidized to SO4 2-, and utilize the energy assimilation CO that this reaction discharges2, to synthesize own cells material, it is achieved growing multiplication, the reaction formula of the autotrophic denitrification denitrogenation using sulphur as electron donor is as follows:
NO3 -+1.047S+0.283CO2+0.740H2O��0.056C5H7O2N+0.472N2+1.047SO4 2-+1.094H+
Finally, the treated TN of realization of sewage up to standard after by the discharge of the rising pipe on device top or enter next processing unit.
Run continuously at this device, head loss is when increasing, and closes and surmounts pipe valve, blow-off valve, water intaking valve, outlet valve, opens back flushing water intaking valve and back flushing outlet valve, and open back flushing intake pump, this device is carried out back flushing. Wherein, backwashing water is Sewage Plant secondary effluent, and backwashing time is 10��15min, and back flushing water outlet enters the total feed-water end of Sewage Plant by back flushing rising pipe.
The useful effect of the technique scheme of the present invention is as follows:
One, by the accurate proportioning of ferric sufide and brenstone, mixed packing, the problems such as single sulfurous iron ore packed column reactor length start time, residence time length, floor space be big can be solved, and single sulphur packed column reactor pH fall is big, the problems such as water outlet pH is too low, have toggle speed fast, it is not necessary to seed sludge, the advantages such as the residence time is short, and floor space is little; Two, arranging crossing pipe on reactor water inlet pipe, equal mounted valve on water inlet pipe and crossing pipe, can flexibly according to whether the TN situation selection in secondary effluent passes through reactor; Three, without the need to additional carbon, working cost is low, it is effective to process, sludge yield is few, backwashing period is long, is easy to through engineering approaches application; Four, in device, microorganism can stand long-time hunger, can Recovery processing effect fast after reruning.
Accompanying drawing explanation
Fig. 1 is the dyeing waste water autotrophic denitrification nitrogen rejection facility structural representation of the present invention;
Fig. 2 is that device starting period of the present invention is to the removal effect figure of TN.
Wherein: 1-water inlet pipe; 2-water intaking valve; 3-surmounts pipe; 4-surmounts pipe valve; 5-back flushing water inlet pipe; 6-back flushing water intaking valve; 7-back flushing intake pump; 8-blow-down pipe; 9-blow-off valve; 10-rising pipe; 11-outlet valve; 12-back flushing outlet valve; 13-sends out and flushes out water pipe; 14-sulfurous iron ore packing layer; 15-sulphur packing layer; 16-filter plate and strainer head; 17-reactor body.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, it is described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention is directed to the problem that existing treatment of dyeing wastewater factory causes water outlet TN to exceed standard because of heterotrophic denitrification carbon source deficiency, it is provided that a kind of dyeing waste water autotrophic denitrification nitrogen rejection facility and method.
As shown in Figure 1, it is the structural representation of this device. this device comprises water inlet pipe 1, water intaking valve 2, surmount pipe 3, surmount pipe valve 4, back flushing water inlet pipe 5, back flushing water intaking valve 6, back flushing intake pump 7, blow-down pipe 8, blow-off valve 9, rising pipe 10, outlet valve 11, back flushing outlet valve 12, back flushing rising pipe 13 and reactor body 17, wherein, back flushing water inlet pipe 5 is connected to bottom reactor body 17, blow-down pipe 8 is connected to bottom, reactor body 17 side, water inlet pipe 1 is connected with back flushing water inlet pipe 8, make the water in water inlet pipe 1 and back flushing water inlet pipe 8 by entering reactor body 17 bottom reactor body 17, rising pipe 10 and back flushing rising pipe 13 are connected to reactor body 17 top, surmounting pipe 3 to be connected on water inlet pipe 1, surmount setting on pipe 3 and surmount pipe valve 4, water intaking valve 2 is arranged on water inlet pipe 1, and water intaking valve 2 is surmounting between pipe 3 and water inlet pipe 1 junction and reactor body 17 and water inlet pipe 1 junction, installation of relief valve 9 on blow-down pipe 8, back flushing water inlet pipe 5 arranges back flushing water intaking valve 6, back flushing intake pump 7 is set between back flushing water intaking valve 6 and reactor body 17, rising pipe 10 sets out water valve 11, back flushing rising pipe 13 arranges back flushing outlet valve 12, in reactor body 17, under oneself, filter plate and strainer head 16, sulfurous iron ore packing layer 14 and sulphur packing layer 15 are up set successively.
Wherein, reactor body 17 is the biochemical reactor of right cylinder, sulphur packing layer 15 top accounts for the 10% of reactor body 17 height apart from the distance of reactor body 17 water outlet, the volume ratio of sulfurous iron ore packing layer 14 and sulphur packing layer 15 is 1:5, sulfurous iron ore packing layer 14 packing material size is 3��5mm, and sulphur content is greater than 48%, and iron level is greater than 43%, sulphur packing layer 15 packing material size is 3��5mm, and sulphur content is greater than 95%.
Embodiment 1: the quick startup of reactor
As shown in Figure 1, device is taking Wuxi treatment of dyeing wastewater factory secondary effluent as handling object for the testing apparatus that test adopts. All valves on first stopping device, then the 1:5 layering by volume of ferric sufide and brenstone filler loaded, first load sulfurous iron ore and recharge sulphur, and filler top layer accounts for the 10% of whole height for reactor apart from the distance of water outlet. After filler loads, open water intaking valve 2 and outlet valve 11, surmount pipe valve 4, back flushing water intaking valve 6, blow-off valve 9 and back flushing outlet valve 12 still to keep closing, secondary effluent enters reaction unit by water inlet pipe 1, and successively through filter plate and strainer head 16, sulfurous iron ore packing layer 14 and sulphur packing layer 15, eventually through arranging outside rising pipe 10 or enter next processing unit.
Device adopts the natural starting mode without seed sludge, and starting period operating parameter is: empty bed residence time 1h, hydraulic load is 14.4m3/(m2D), starting period operating performance influent quality is: TN9.95mg/L, NO3 --N is 8.96mg/L, gets device Inlet and outlet water every day, measures its water-quality guideline, and as shown in Figure 2, device completed to start result in 3 days, and hereafter water outlet TN is less than 5mg/L, has good denitrification effect.
Embodiment 2: high water-base fluid dyeing waste water denitrogenation
This test is proceeded after the success of embodiment 1 reactor start-up.
Device is taking Wuxi treatment of dyeing wastewater factory secondary effluent as handling object, and operating parameter is: empty bed residence time 20min, hydraulic load is 43.2m3/(m2D), TN of intaking is 19.53mg/L, NO3 --N is 17.78mg/L, water outlet TN is 5.93mg/L, TN clearance is 69.7%, one-level A mark and the emission standard in " TAI HU AREA urban wastewater treatment firm and the main water pollutant emission limit of priority industry industry " (DB32/T1072-2007) that water outlet TN is much better than in " urban wastewater treatment firm pollutant emission standard " (GB18918-2002).
Embodiment 3: high water-base fluid simulated wastewater denitrogenation
This test is proceeded after the success of embodiment 1 reactor start-up.
Test water inlet is the simulated wastewater of artificial preparation, and operating parameter is: empty bed residence time 20min, hydraulic load is 43.2m3/(m2D), TN of intaking is 25.35mg/L, NO3 --N is 23.43mg/L, and water outlet TN is 2.16mg/L, TN clearance is 91.5%, it is achieved that efficient denitrification.
Embodiment 4: high water-base fluid municipal wastewater nitrogen
This test is proceeded after the success of embodiment 1 reactor start-up.
Device is taking Shenyang municipal sewage plant secondary effluent as handling object, and operating parameter is: empty bed residence time 20min, hydraulic load is 43.2m3/(m2D), water inlet TN is 14.39mg/L, and water outlet TN is 1.01mg/L, TN clearance is 93.0%, and water outlet TN is better than IV class water water quality standard in " water environment quality standard " (GB3838-2002).
The above is the preferred embodiment of the present invention; it is noted that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also making some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a dyeing waste water autotrophic denitrification nitrogen rejection facility, it is characterised in that: comprise water inlet pipe (1), water intaking valve (2), surmount pipe (3), surmount pipe valve (4), back flushing water inlet pipe (5), back flushing water intaking valve (6), back flushing intake pump (7), blow-down pipe (8), blow-off valve (9), rising pipe (10), outlet valve (11), back flushing outlet valve (12), back flushing rising pipe (13) and reactor body (17), wherein, back flushing water inlet pipe (5) is connected to reactor body (17) bottom, blow-down pipe (8) is connected to reactor body (17) bottom, side, water inlet pipe (1) is connected with back flushing water inlet pipe (8), making the water in water inlet pipe (1) and back flushing water inlet pipe (8) enter reactor body (17) by reactor body (17) bottom, rising pipe (10) and back flushing rising pipe (13) are connected to reactor body (17) top, surmounting pipe (3) is connected on water inlet pipe (1), surmount the upper setting of pipe (3) and surmount pipe valve (4), water intaking valve (2) is arranged on water inlet pipe (1), and water intaking valve (2) is positioned at and surmounts between pipe (3) and water inlet pipe (1) junction and reactor body (17) and water inlet pipe (1) junction, the upper installation of relief valve (9) of blow-down pipe (8), back flushing water inlet pipe (5) arranges back flushing water intaking valve (6), back flushing intake pump (7) is set between back flushing water intaking valve (6) and reactor body (17), rising pipe (10) sets out water valve (11), back flushing rising pipe (13) arranges back flushing outlet valve (12), in reactor body (17), under oneself, filter plate and strainer head (16), sulfurous iron ore packing layer (14) and sulphur packing layer (15) are up set successively.
2. dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: described reactor body (17) is right cylinder.
3. dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: described sulphur packing layer (15) top accounts for the 10% of reactor body (17) height apart from the distance of reactor body (17) water outlet.
4. dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: the volume ratio of described sulfurous iron ore packing layer (14) and sulphur packing layer (15) is 1:5.
5. dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: described sulfurous iron ore packing layer (14) packing material size is 3��5mm, and sulphur content is greater than 48%, and iron level is greater than 43%.
6. dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterised in that: described sulphur packing layer (15) packing material size is 3��5mm, and sulphur content is greater than 95%.
7. adopt the dyeing waste water denitrogenation method of dyeing waste water autotrophic denitrification nitrogen rejection facility according to claim 1, it is characterized in that: when treatment of dyeing wastewater factory secondary effluent TN is up to standard, close water intaking valve (2), back flushing water intaking valve (6) and blow-off valve (9), unlatching surmounts and surmounts pipe valve (4) on pipe (3), by surmounting, the direct autotrophic denitrification nitrogen rejection facility of crossing over of pipe (3) enters next processing unit or direct outer row to current, and autotrophic denitrification device is in idle state;
When treatment of dyeing wastewater factory secondary effluent TN exceeds standard, stopping device surmounts pipe valve (4), back flushing water intaking valve (6), back flushing outlet valve (12) and blow-off valve (9), open water intaking valve (2) and water outlet pipe valve (11), secondary effluent enters reactor body (17) by water inlet pipe (1), the water inlet entering reactor body (17) is first by entering sulfurous iron ore packing layer (14) after filter plate and strainer head (16) uniform water distribution, then sulphur packing layer (15) is entered, finally, discharge or enter next processing unit by the rising pipe (10) on device top after the treated TN of realization of sewage is up to standard,
Run continuously at this device, head loss increase, closedown surmounts pipe valve (4), blow-off valve (9), water intaking valve (2), outlet valve (11), open back flushing water intaking valve (6) and back flushing outlet valve (12), and open back flushing intake pump (7), this device is carried out back flushing.
8. dyeing waste water autotrophic denitrification nitrogen rejection facility and method according to claim 1 or 7, it is characterized in that: described backwashing water is Sewage Plant secondary effluent, backwashing time is 10��15min, and back flushing water outlet enters the total feed-water end of Sewage Plant by back flushing rising pipe (13).
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Cited By (13)
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| CN106946415A (en) * | 2017-05-05 | 2017-07-14 | 河南弘康环保科技有限公司 | A kind of denitrogenation of waste water processing system and denitrification treatment process |
| CN107176702A (en) * | 2017-07-31 | 2017-09-19 | 南京大学 | A kind of sewage water treatment method for strengthening sulphur autotrophic denitrification process synchronous denitrification dephosphorizing |
| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
| CN108423826A (en) * | 2018-04-11 | 2018-08-21 | 中国环境科学研究院 | A kind of improvement A2O and sulphur autotrophy combined denitrification dephosphorizing reactor and sewage water treatment method |
| CN108439613A (en) * | 2018-04-23 | 2018-08-24 | 南京大学 | A kind of modularization sewage denitrification and dephosphorization treatment process based on sulphur autotrophic denitrification |
| CN108503026A (en) * | 2018-04-19 | 2018-09-07 | 中国矿业大学 | City secondary effluent sulfenyl matter recycles autotrophic denitrification method |
| CN108706727A (en) * | 2018-04-19 | 2018-10-26 | 中国矿业大学 | A kind of baffling type anaerobic autotrophic denitrification biological reaction process and device |
| CN109879415A (en) * | 2017-05-24 | 2019-06-14 | 中国科学院生态环境研究中心 | A method of it being sustained electron donor and carries out sewage deep denitrogenation using it |
| CN110407321A (en) * | 2019-08-14 | 2019-11-05 | 中国矿业大学 | Multilevel hierarchy packed-bed reactor city secondary effluent advanced nitrogen phosphorus removing method |
| CN110776219A (en) * | 2019-12-10 | 2020-02-11 | 江南大学 | Advanced treatment device for printing and dyeing wastewater pollutants and application thereof |
| CN110963644A (en) * | 2019-12-11 | 2020-04-07 | 安徽建筑大学 | High-nitrate industrial wastewater denitrification pretreatment system, method and application thereof |
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| CN112919626A (en) * | 2021-01-21 | 2021-06-08 | 臻和慧联(常山)环境科技有限公司 | Ferrosulfur autoxidation denitrification device and reaction control method |
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| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
| CN106946415A (en) * | 2017-05-05 | 2017-07-14 | 河南弘康环保科技有限公司 | A kind of denitrogenation of waste water processing system and denitrification treatment process |
| CN109879415A (en) * | 2017-05-24 | 2019-06-14 | 中国科学院生态环境研究中心 | A method of it being sustained electron donor and carries out sewage deep denitrogenation using it |
| CN107176702A (en) * | 2017-07-31 | 2017-09-19 | 南京大学 | A kind of sewage water treatment method for strengthening sulphur autotrophic denitrification process synchronous denitrification dephosphorizing |
| CN108423826A (en) * | 2018-04-11 | 2018-08-21 | 中国环境科学研究院 | A kind of improvement A2O and sulphur autotrophy combined denitrification dephosphorizing reactor and sewage water treatment method |
| CN108706727B (en) * | 2018-04-19 | 2021-07-27 | 中国矿业大学 | Baffling type anaerobic autotrophic denitrification biological reaction process and device |
| CN108503026A (en) * | 2018-04-19 | 2018-09-07 | 中国矿业大学 | City secondary effluent sulfenyl matter recycles autotrophic denitrification method |
| CN108706727A (en) * | 2018-04-19 | 2018-10-26 | 中国矿业大学 | A kind of baffling type anaerobic autotrophic denitrification biological reaction process and device |
| CN108503026B (en) * | 2018-04-19 | 2021-07-27 | 中国矿业大学 | Urban secondary effluent sulfur matrix circulating autotrophic nitrogen removal method |
| CN108439613B (en) * | 2018-04-23 | 2020-06-26 | 南京大学 | Modularized sewage nitrogen and phosphorus removal treatment process based on sulfur autotrophic denitrification |
| CN108439613A (en) * | 2018-04-23 | 2018-08-24 | 南京大学 | A kind of modularization sewage denitrification and dephosphorization treatment process based on sulphur autotrophic denitrification |
| CN110407321A (en) * | 2019-08-14 | 2019-11-05 | 中国矿业大学 | Multilevel hierarchy packed-bed reactor city secondary effluent advanced nitrogen phosphorus removing method |
| CN110776219A (en) * | 2019-12-10 | 2020-02-11 | 江南大学 | Advanced treatment device for printing and dyeing wastewater pollutants and application thereof |
| CN110963644A (en) * | 2019-12-11 | 2020-04-07 | 安徽建筑大学 | High-nitrate industrial wastewater denitrification pretreatment system, method and application thereof |
| CN110963644B (en) * | 2019-12-11 | 2021-10-15 | 安徽建筑大学 | High-nitrate industrial wastewater denitrification pretreatment system, method and application thereof |
| CN111018132A (en) * | 2019-12-19 | 2020-04-17 | 南京大学 | Water treatment device for nitrogen and phosphorus removal and treatment method thereof |
| CN111018132B (en) * | 2019-12-19 | 2021-09-28 | 南京大学 | Water treatment device for nitrogen and phosphorus removal and treatment method thereof |
| CN112919626A (en) * | 2021-01-21 | 2021-06-08 | 臻和慧联(常山)环境科技有限公司 | Ferrosulfur autoxidation denitrification device and reaction control method |
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