CN105668789A - Integrated denitrification sewage treatment device and sewage treatment method - Google Patents
Integrated denitrification sewage treatment device and sewage treatment method Download PDFInfo
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- CN105668789A CN105668789A CN201610061550.3A CN201610061550A CN105668789A CN 105668789 A CN105668789 A CN 105668789A CN 201610061550 A CN201610061550 A CN 201610061550A CN 105668789 A CN105668789 A CN 105668789A
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- C—CHEMISTRY; METALLURGY
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C—CHEMISTRY; METALLURGY
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Abstract
The invention discloses an integrated denitrification sewage treatment device. An outer layer of an up-flow fixed-bed continuous flow reactor is a heat insulation layer, and an inner layer comprises an upper-layer reaction chamber and a lower-layer reaction chamber; a water inlet and a water outlet of a circulating water bath are arranged at the upper end and the lower end of the heat insulation layer respectively; an exhaust port, the water outlet and a pH probe inlet are arranged at the top of the fixed-bed continuous flow reactor; multiple sampling ports at different heights are formed in the side wall of the reactor and controlled by valves; the upper-layer reaction chamber is filled with non-woven fabric filler with facultative bacteria attached, an aeration device capable of realizing upward aeration is arranged below the non-woven fabric filler, and a three-phase separator is arranged below the aeration device; a round baffle is arranged below the three-phase separator; the lower-layer reaction chamber is located below the round baffle and filled with biofringe filler; the water inlet is arranged at the bottom of the lower-layer reaction chamber, and a water distributor for evenly distributing water in the reactor is arranged above the water inlet. The invention further discloses a sewage treatment method using the device.
Description
Technical field
The present invention relates to the waste disposal plant of a kind of integration denitrification.
The present invention also relates to the method utilizing said apparatus to carry out integration denitrification-partial nitrification-Anammox sewage disposal.
Background technology
Sewage water denitrification process is one of important means of control receiving water body eutrophication, and biological denitrificaion applies method the most general during sewage water denitrification processes. Traditional nitrification-denitrification denitrification process, A/O technique etc., use the means adding carbon source to carry out intensified anti-nitrated effect usually, and these means also exist and add the whether excessive risk of carbon source. Because municipal effluent carbon-nitrogen ratio general lower (COD/N≤4～6), if carbon source adds deficiency, water outlet can occur Nitrates to accumulate, and causes the total nitrogen of water outlet to rise; Carbon source adds excessive, and the organic carbon in water outlet can rise, and water outlet is still difficult to up to standard. Therefore, find and set up a kind of sewage denitrification system novel, energy-conserving and environment-protective and China is efficiently processed ammonia nitrogen waste water be significant.
Anammox (anammox) technique is the bio-denitrification technology of a kind of novel, energy-conserving and environment-protective, utilizes nitrite as electron acceptor(EA) oxidize ammonia nitrogen, it is not necessary to additional organic carbon source, it may be achieved denitrification of autotrophic organism. Therefore, compared with tradition denitrification process, a large amount of energy and running cost has effectively been saved.
Summary of the invention
It is an object of the invention to provide the waste disposal plant of a kind of integrated high-efficiency denitrogenation.
The present invention also relates to the method utilizing said apparatus to carry out integration denitrification-partial nitrification-Anammox sewage disposal.
For achieving the above object, the waste disposal plant of integration denitrification provided by the invention, mainly comprises:
One upflow fixed bed continuous flow reactor, skin is thermal insulation layer, and internal layer is responding layer, and this responding layer is divided into upper strata reaction chamber and lower floor's reaction chamber;
The top and bottom of thermal insulation layer are respectively equipped with water-in and the water outlet of circulator bath;
Fixed bed continuous flow reactor top is provided with venting port, water outlet and pH probe and stretches into mouth;The sidewall of up-flow reactor is provided with multiple thief hatchs of different heights, and each thief hatch is by Valve controlling;
Filling is with the non-woven carrier of oxygen bacterium of holding concurrently in the reaction chamber of upper strata, and the lower section of non-woven carrier is provided with the aerating apparatus of a upwards aeration, and the lower section of aerating apparatus is provided with triphase separator;
The lower section of triphase separator is provided with a circular baffle plate, forms bending water stream channel by three between separator and circular baffle plate;
The lower section of circular baffle plate is lower floor's reaction chamber, is filled with biofringe filler in lower floor's reaction chamber, and biofringe filler adheres to denitrifying bacteria; The bottom of lower reactor is water-in, is provided with one and makes the uniform water distributor of cloth water in reactor above water-in.
Described waste disposal plant, wherein, up-flow reactor is Cylindrical housing structure, adopts double-deck synthetic glass to make.
Described waste disposal plant, wherein, up-flow reactor is furnished with three peristaltic pumps, is respectively used to into water, circulation, acid-alkali accommodation.
Described waste disposal plant, wherein, triphase separator is for tilting 45 ° of flap separators.
Described waste disposal plant, wherein, the water-in of lower reactor connects one for regulating the equalizing tank of water inlet pH value.
Described waste disposal plant, wherein, pH probe stretches into, by the pH probe of upper strata reaction chamber, the top that mouth stretches to circular baffle plate, and this pH pops one's head in and connects pH linkage instrument.
The above-mentioned waste disposal plant of the present invention is utilized to carry out the method for sewage water denitrification process:
Pending sewage regulates pH to 7.2-7.5 by equalizing tank, evenly enters lower floor's reaction chamber of upflow fixed bed continuous flow reactor through water distributor, carries out denitrification under with the existence of the biofringe filler of denitrifying bacteria;
The sewage of lower floor's reaction chamber enters upper strata reaction chamber by triphase separator, completes partial nitrification-anaerobic ammonia oxidation process process simultaneously; Can prevent the mud of upper strata reaction chamber and lower floor's reaction chamber from entering in contrary reaction chamber with current by triphase separator, also the current of lower floor's reaction chamber can be made to enter upper strata reaction chamber from the passage limit, in the reaction chamber of top, form backflow, avoid owing to air-flow current are excessive and affect the adhesion effect of upper strata reaction chamber mud.
Described method, wherein, the water outlet part after process is back to into water, is again entered lower floor's reaction chamber of upflow fixed bed continuous flow reactor by equalizing tank, carries out circular treatment.
Described method, wherein, sewage, in treating processes, is detected by the sampling of the thief hatch of different heights.
Described method, wherein, the start-up course before the use of upflow fixed bed continuous flow reactor is:
1) first on the non-woven carrier of up-flow reactor upper strata reaction chamber, inoculate anammox mud, utilize artificial preparation nitrogenous effluent to carry out cultivating domestication;
2) exposing nitrogen to artificial wastewater, making into the dissolved oxygen concentration in water is 0mg/L, and adjustment pH is 7-8; Artificial wastewater's composition is as follows:
NH4-N100mg/L, NO2-N100mg/L, KHCO31.5-2.0g/L, NaCl10g/L, KH2PO454mg/L, FeSO4·7H2O9mg/L, EDTA5mg/L, trace element 1mL/L; The composition of described trace element is: CuSO4·5H2O0.25mg/L, ZnSO4·7H2O0.43mg/L, CoCl2·6H2O0.24mg/L, MnCl2·4H2O0.99mg/L, NaMoO4·2H2O0.22mg/L, NiCl2·6H2O0.19mg/L, NaSeO40.11mg/L, H3BO30.014mg/L;
3), after question response is stablized, dissolved oxygen concentration in water inlet is progressively improved, to cultivate the bacterium that can consume oxygen in reactor;
4) through cultivating domestication, non-woven carrier outside surface with oxygen bacterium of holding concurrently, can dissolved oxygen in consumption of reactor, be that anaerobic condition is built in anammox reaction;
5) inoculate nitrococcus to upper strata reaction chamber with the non-woven fabrics of anammox bacterium, and reduce the nitrite nitrogen concentration in water inlet, carry out aeration simultaneously;
6) realize after stable integral part nitrosation-anaerobic ammoxidation process until upper strata reaction chamber, put into the biofringe filler with denitrifying bacteria inoculated in advance in lower floor's reaction chamber, it is achieved the denitrification treating processes of lower floor's reaction chamber;
7), after up-flow reactor successfully starts, water inlet can be changed to actual waste water.
The advantage of the present invention is:
1) save space compared with well known device, in same reactor, realize denitrification-partial nitrification-Anammox combination process, and without the need to adding any organic carbon source, save space, reduce energy consumption, easy and simple to handle, being suitable for water quality extensive, nitric efficiency can reach more than 90%;
2) anaerobic ammonia oxidation process is combined with traditional A/O technique, reduce aeration rate (about 50%) needed for nitrifying process in A/O technique; Simultaneously, denitrification process is put in lower floor's reaction chamber by the present invention, waste water is made first to carry out denitrification by lower floor's reaction chamber, on the one hand, denitrifying bacteria can utilize the organism in former water and upper strata reaction chamber (integral part nitrosation-anaerobic ammoxidation) to go out Organic substance in water, for the nutrient that the growth offer of denitrifying bacteria is necessary, both saved the energy, had preventing pollution; On the other hand, denitrification process produces alkaline consumption acid, and nitrifying process produces acid consumption alkali, and denitrification water outlet enters integral part nitrosation-anaerobic ammoxidation reactor, for partial nitrification provides necessary basicity, thus saves the energy; In addition, the partial reflux of water outlet, can reach the object diluting former water, alleviate the impact into water high loading.
In sum, the present invention combines tradition A/O technique, it is achieved same reactor denitrification-partial nitrification-Anammox combined denitrification technique, it is not necessary to add carbon source, not only significantly improve nitric efficiency, also can save the energy, reduces floor space.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram of the present invention.
In accompanying drawing, main label symbol illustrates:
Intake pump 1, biofringe filler 2, aeration head 3, non-woven carrier 4, water distributor 5, circular baffle plate 6, three separators 7, pH linkage instrument 8, equalizing tank 9, reflux pump 10, under meter 11, thermal insulation layer 12, upflow fixed bed continuous flow reactor lower reactor water-in a, thief hatch b, c, d, i, water outlet g, pH probe stretches into a mouthful h, circulator bath mouth I, II.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The device entirety of the present invention is a upflow fixed bed continuous flow reactor, and its top is provided with water outlet g and pH probe and stretches into a mouthful h. The housing of upflow fixed bed continuous flow reactor is cylindrical double hull, skin is thermal insulation layer 12, the top and bottom of thermal insulation layer 12 are respectively equipped with circulator bath mouth I, II, and in this enforcement, following end circulator bath mouth I is water-in, and upper end circulator bath mouth II is water outlet.
The internal layer of upflow fixed bed continuous flow reactor is responding layer, and responding layer is divided into upper and lower layer two reaction chamber.
The internal layer of upflow fixed bed continuous flow reactor is provided with non-woven carrier 4, and non-woven carrier 4 surface can be adhered to mud and have oxygen bacterium of holding concurrently after cultivating domestication, effectively prevents mud from outflowing, thus improves nitric efficiency. The lower section of non-woven carrier 4 is only provided with the disc type aeration head 3 of upwards aeration, and the gas of aeration head 3 evenly enters the non-woven carrier of upper strata reaction chamber for completing partial nitrification process.The lower section of aeration head 3 is provided with three separators 7, and three separators in the present embodiment adopt 45 ° of flap separators. It is provided with circular baffle plate 6 in the lower section of three separators 7, circular baffle plate 6 is fixed on the axle sleeve of the up-flow reactor of up/down perforation, bending water stream channel is formed between circular baffle plate 6 and three separators 7, water, gas, granule sludge are separated, and prevent upper strata reaction chamber and lower floor's reaction chamber mud from entering contrary reaction zone.
Triphase separator exit is provided with a pH probe, and this pH pops one's head in and connects the outside pH linkage instrument (NaHCO of HCl and 1mol/L of 1mol/L3), for regulating from lower floor's reaction chamber waste water ph (7.8-8.0) out.
The non-woven carrier 4 of upper strata reaction chamber filling, carries out partial nitrification-Anammox denitrogenation. Non-woven carrier can adhere to mud, effectively prevents mud from outflowing, thus improves nitric efficiency.
The sidewall of upflow fixed bed continuous flow reactor is provided with multiple thief hatch b, c, d, i of different heights, and each thief hatch all adopts Valve controlling, can by the thief hatch sampling detection of different heights in sewage treatment process.
The lower section of circular baffle plate 6 is lower floor's reaction chamber, and lower floor's reaction chamber is filled with the biofringe filler 2 of attachment denitrifying bacteria RR, and sewage is carried out denitrification denitrogenation. The water-in a of lower floor's reaction chamber connects equalizing tank 9, and this equalizing tank 9 is connected with pH linkage instrument 8. The top of the water-in a of lower floor's reaction chamber is provided with water distributor 5 so that the cloth water in upflow fixed bed continuous flow reactor is even.
What the denitrification process of the present invention was underlying act predominantly in:
1) anaerobic ammonia oxidation process is combined with tradition A/O technique, reduce aeration rate (about 50%) needed for nitrifying process in A/O technique, and whole reaction process is concentrated in a reactor carry out, save space;
2) denitrifying bacteria can utilize the organism in former water and upper strata reaction chamber (integral part nitrosation-anaerobic ammoxidation) to go out Organic substance in water, is the nutrient that the growth offer of denitrifying bacteria is necessary, had both saved the energy, and had preventing pollution;
3) denitrification process produces alkaline consumption acid, and nitrifying process produces acid consumption alkali, and denitrification water outlet enters integral part nitrosation-anaerobic ammoxidation reactor, for partial nitrification provides necessary basicity, thus saves the energy.
A water outlet part for upper strata reaction chamber is back to equalizing tank, and the lower floor's reaction chamber again entering upflow fixed bed continuous flow reactor carries out circular treatment.
The effect that the water part of upper strata reaction chamber carries out pump around circuit mainly contains two:
1) organism in the by product nitre nitrogen of the untreated nitrogen of ammonia completely, generation and water is back to up-flow reactor entrance and processes again, thus can improve the nitric efficiency of up-flow reactor;
2) object of dilution water inlet can be reached, reduce up-flow reactor really operating load, also reach the object reducing greenhouse gases nitrous oxide emission.
The waste disposal plant of the present invention carries out the method for sewage water denitrification process:
Pending sewage regulates pH to 7.2-7.5 by intake pump 1 by pH linkage instrument 8 and equalizing tank 9, evenly enter lower floor's reaction chamber of upflow fixed bed continuous flow reactor through water distributor 5, under with the existence of the biofringe filler 2 of denitrifying bacteria, carry out denitrification;
The sewage of lower floor's reaction chamber enters upper strata reaction chamber by the bending water stream channel formed between circular baffle plate 6 and three separators 7, water, gas, granule sludge are separated, and prevent upper strata reaction chamber and lower floor's reaction chamber mud from entering contrary reaction zone, complete partial nitrification-anaerobic ammonia oxidation process process simultaneously;Can prevent the mud of upper strata reaction chamber and lower floor's reaction chamber from entering in contrary reaction chamber with current by triphase separator, also the current of lower floor's reaction chamber can be made to enter upper strata reaction chamber from the passage limit, in the reaction chamber of top, form backflow, avoid owing to air-flow current are excessive and affect the adhesion effect of upper strata reaction chamber mud. A treated water outlet part is back to equalizing tank 9 under the effect of reflux pump 10, by again entering lower floor's reaction chamber of upflow fixed bed continuous flow reactor after adjustment pH, carries out circular treatment. Sewage, in treating processes, is detected by the sampling of the thief hatch of different heights.
Effluent flow rate in upflow fixed bed continuous flow reactor is monitored by under meter 11.
Start-up course before the upflow fixed bed continuous flow reactor use of the present invention is:
1) first on the non-woven carrier of up-flow reactor upper strata reaction chamber, inoculate anammox mud, utilize artificial preparation nitrogenous effluent to carry out cultivating domestication;
2) exposing nitrogen to artificial wastewater, making into the dissolved oxygen concentration in water is 0mg/L, and adjustment pH is 7-8; Artificial wastewater's composition is as follows:
NH4-N100mg/L, NO2-N100mg/L, KHCO31.5-2.0g/L, NaCl10g/L, KH2PO454mg/L, FeSO4·7H2O9mg/L, EDTA5mg/L, trace element 1mL/L; The composition of described trace element is: CuSO4·5H2O0.25mg/L, ZnSO4·7H2O0.43mg/L, CoCl2·6H2O0.24mg/L, MnCl2·4H2O0.99mg/L, NaMoO4·2H2O0.22mg/L, NiCl2·6H2O0.19mg/L, NaSeO40.11mg/L, H3BO30.014mg/L;
3), after question response is stablized, dissolved oxygen concentration in water inlet is progressively improved, to cultivate the bacterium that can consume oxygen in reactor;
4) through cultivating domestication, non-woven carrier outside surface with oxygen bacterium of holding concurrently, can dissolved oxygen in consumption of reactor, be that anaerobic condition is built in anammox reaction;
5) inoculate nitrococcus to upper strata reaction chamber with the non-woven fabrics of anammox bacterium, and reduce the nitrite nitrogen concentration in water inlet, carry out aeration simultaneously;
6) realize after stable integral part nitrosation-anaerobic ammoxidation process until upper strata reaction chamber, put into the biofringe filler with denitrifying bacteria inoculated in advance in lower floor's reaction chamber, it is achieved the denitrification treating processes of lower floor's reaction chamber;
7), after up-flow reactor successfully starts, water inlet can be changed to actual waste water.
Present invention achieves same reactor and carry out denitrification-partial nitrification-Anammox integral process process, save big quantity space, it is not necessary to any additional carbon, and the nitric efficiency of more than 90% can be reached.
Claims (10)
1. a waste disposal plant for integration denitrification, mainly comprises:
One upflow fixed bed continuous flow reactor, skin is thermal insulation layer, and internal layer is responding layer, and this responding layer is divided into upper strata reaction chamber and lower floor's reaction chamber;
The top and bottom of thermal insulation layer are respectively equipped with water-in and the water outlet of circulator bath;
Upflow fixed bed continuous flow reactor top is provided with venting port, water outlet and pH probe and stretches into mouth;
The sidewall of upflow fixed bed continuous flow reactor is provided with multiple thief hatchs of different heights, and each thief hatch is by Valve controlling;
Filling is with the non-woven carrier of oxygen bacterium of holding concurrently in the reaction chamber of upper strata, and the lower section of non-woven carrier is provided with the aerating apparatus of a upwards aeration, and the lower section of aerating apparatus is provided with triphase separator;
The lower section of triphase separator is provided with a circular baffle plate, forms bending water stream channel by three between separator and circular baffle plate;
The lower section of circular baffle plate is lower floor's reaction chamber, is filled with biofringe filler in lower floor's reaction chamber, and biofringe filler adheres to denitrifying bacteria;The bottom of lower reactor is water-in, is provided with one and makes the uniform water distributor of cloth water in reactor above water-in.
2. waste disposal plant according to claim 1, wherein, up-flow reactor is Cylindrical housing structure, adopts double-deck synthetic glass to make.
3. waste disposal plant according to claim 1, wherein, up-flow reactor is furnished with three peristaltic pumps, is respectively used to into water, circulation, acid-alkali accommodation.
4. waste disposal plant according to claim 1, wherein, triphase separator is for tilting 45 ° of flap separators.
5. waste disposal plant according to claim 1, wherein, the water-in of lower reactor connects one for regulating the equalizing tank of water inlet pH value.
6. waste disposal plant according to claim 1, wherein, pH probe stretches into, by the pH probe of upper strata reaction chamber, the top that mouth stretches to circular baffle plate, and this pH pops one's head in and connects pH linkage instrument.
7. utilize waste disposal plant described in claim 1 to carry out the method for sewage disposal:
Pending sewage regulates pH to 7.2-7.5 by equalizing tank, evenly enters lower floor's reaction chamber of upflow fixed bed continuous flow reactor through water distributor, carries out denitrification under with the existence of the biofringe filler of denitrifying bacteria;
The sewage of lower floor's reaction chamber enters upper strata reaction chamber by triphase separator, completes partial nitrification-anaerobic ammonia oxidation process process simultaneously; Can prevent the mud of upper strata reaction chamber and lower floor's reaction chamber from entering in contrary reaction chamber with current by triphase separator, also the current of lower floor's reaction chamber can be made to enter upper strata reaction chamber from the passage limit, in the reaction chamber of top, form backflow, avoid owing to air-flow current are excessive and affect the adhesion effect of upper strata reaction chamber mud.
8. method according to claim 7, wherein, the water outlet part after process is back to into water, is again entered lower floor's reaction chamber of upflow fixed bed continuous flow reactor by equalizing tank, carries out circular treatment.
9. method according to claim 7, wherein, sewage, in treating processes, is detected by the sampling of the thief hatch of different heights.
10. method according to claim 7, wherein, the start-up course before the use of upflow fixed bed continuous flow reactor is:
1) first on the non-woven carrier of up-flow reactor upper strata reaction chamber, inoculate anammox mud, utilize artificial preparation nitrogenous effluent to carry out cultivating domestication;
2) exposing nitrogen to artificial wastewater, making into the dissolved oxygen concentration in water is 0mg/L, and adjustment pH is 7-8; Artificial wastewater's composition is as follows:
NH4-N100mg/L, NO2-N100mg/L, KHCO31.5-2.0g/L, NaCl10g/L, KH2PO454mg/L, FeSO4·7H2O9mg/L, EDTA5mg/L, trace element 1mL/L; The composition of described trace element is: CuSO4·5H2O0.25mg/L, ZnSO4·7H2O0.43mg/L, CoCl2·6H2O0.24mg/L, MnCl2·4H2O0.99mg/L, NaMoO4·2H2O0.22mg/L, NiCl2·6H2O0.19mg/L, NaSeO40.11mg/L, H3BO30.014mg/L;
3), after question response is stablized, dissolved oxygen concentration in water inlet is progressively improved, to cultivate the bacterium that can consume oxygen in reactor;
4) through cultivating domestication, non-woven carrier outside surface with oxygen bacterium of holding concurrently, can dissolved oxygen in consumption of reactor, be that anaerobic condition is built in anammox reaction;
5) inoculate nitrococcus to upper strata reaction chamber with the non-woven fabrics of anammox bacterium, and reduce the nitrite nitrogen concentration in water inlet, carry out aeration simultaneously;
6) realize after stable integral part nitrosation-anaerobic ammoxidation process until upper strata reaction chamber, put into the biofringe filler with denitrifying bacteria inoculated in advance in lower floor's reaction chamber, it is achieved the denitrification treating processes of lower floor's reaction chamber;
7), after up-flow reactor successfully starts, water inlet can be changed to actual waste water.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106277327A (en) * | 2016-09-26 | 2017-01-04 | 中国环境科学研究院 | A kind of whole process autotrophic denitrification reactor and denitrification process |
| CN107265759A (en) * | 2017-06-25 | 2017-10-20 | 中国环境科学研究院 | The sewage disposal device and handling process of integration |
| CN107523474A (en) * | 2017-10-23 | 2017-12-29 | 江苏艾特克环境工程设计研究院有限公司 | The culture apparatus and cultural method of a kind of anaerobic ammonia oxidizing bacteria |
| CN109809558A (en) * | 2019-03-19 | 2019-05-28 | 东北大学 | A kind of Composite denitrification reactor and denitrification treatment process based on sulfenyl filler |
| CN110510743A (en) * | 2019-09-26 | 2019-11-29 | 西安建筑科技大学 | A kind of step nitrogen rejection facility and method based on molysite circulation |
| CN110902946A (en) * | 2019-11-27 | 2020-03-24 | 苏州科技大学 | Integrated sewage treatment device |
| CN110902945A (en) * | 2019-11-27 | 2020-03-24 | 苏州科技大学 | Integrated sewage treatment method |
| CN113233591A (en) * | 2021-04-30 | 2021-08-10 | 贵州民族大学 | Combined type biological denitrification effluent treatment plant |
| CN113321303A (en) * | 2021-06-16 | 2021-08-31 | 浙江一谦生态农业科技有限责任公司 | Method for efficiently removing ammonia nitrogen and total nitrogen in wastewater by using denitrifying bacteria |
| CN115028322A (en) * | 2022-07-08 | 2022-09-09 | 烟台市福源金属表面工程有限公司 | A dephosphorization system for sewage treatment |
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