CN104261596A - Method for removing nitrate nitrogen from effluents of sewage plant with resin and method for treating resin regenerating liquid - Google Patents
Method for removing nitrate nitrogen from effluents of sewage plant with resin and method for treating resin regenerating liquid Download PDFInfo
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- CN104261596A CN104261596A CN201410569735.6A CN201410569735A CN104261596A CN 104261596 A CN104261596 A CN 104261596A CN 201410569735 A CN201410569735 A CN 201410569735A CN 104261596 A CN104261596 A CN 104261596A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F3/28—Anaerobic digestion processes
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
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- Biodiversity & Conservation Biology (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a method for removing nitrate nitrogen from effluents of a sewage plant with resin and a method for treating resin regenerating liquid. Through a manner that a plurality of ion exchange resin jars are alternately connected in series, the utilization rate of resin of a unit volume is improved, and therefore the nitrate nitrogen in sewage is effectively removed. Processing equipment is simple and easy to operate, and the investment cost and the operating cost can be reduced. A home-made salt-resistant denitrification reactor is adopted, dissolved oxygen and a pH value are controlled, and an appropriate amount of carbon sources are added, so that the nitrate nitrogen in the regenerating liquid can be effectively removed. The regenerating liquid which is treated flows back to an anaerobic tank or an anoxic tank of the sewage plant, and due to small amount of the regenerating liquid, obvious influence cannot be generated for the treating technology of the whole sewage plant, and the whole treating technology and the methods cannot cause outwards discharge of any pollutant for environment.
Description
Technical field
The invention belongs to water-treatment technology field, relate to a kind of nitrate nitrogen treatment process, particularly a kind of resin removes the method for sewage effluents nitrate nitrogen and the process of resin regeneration liquid, is applicable to the process that sewage work's tail end discharge water nitrate nitrogen exceeds standard.
Background technology
Sanitary sewage and industrial sewage are the products that society unavoidably produces, in order to reach the sustainable development of resource, ensure that the water bodys such as these sewage enter to ocean, river, lake do not produce pollution, therefore, need these sewage disposals to innoxious degree, can be entered to ocean, river, the water body such as lake, even require after some sewage disposal directly to enter drinking water source.And can in sewage effluent the content requirement of nitrate nitrogen lower, part common process is difficult to ensure that in discharge water, nitrate nitrogen is completely up to standard.
Nitrate excessive in water body is easily reduced into nitrite, causes methemoglobinemia after taking in human body, and the baby of less than three months is maximum by this harm; In addition, nitrite makes the risk of human carcinogen in addition.Therefore, many countries and international organization all set most ceiling value to the concentration of Nitrate In Drinking Water, as the nitrate nitrogen content in European Union and the World Health Organization (WHO) regulation tap water must not more than 11.3 mg/L, the limit value of U.S. EPA is 10 mg/L, and the most ceiling value of China's " drinking water sanitary standard " (GB 5749-2006) regulation nitrate nitrogen is 10 limited areas, mg/L(water source is 20 mg/L).
At present, nitrate nitrogen removal technology is divided into physical chemistry, chemistry, biotechnology etc. substantially.Physico-chemical processes mainly contains distillation, electrodialysis, reverse osmosis, ion exchange method etc., and owing to existing, processing costs is higher, high, the easy generation secondary pollution problems of pre-treatment requirement is subject to certain restrictions in application; Chemical method utilizes the nitrate in certain reductive agent reductive water thus removes nitrate, and the more reductive agent of research has metal Fe at present
0, ferrous iron Fe
2+deng, because the control ratio of reaction conditions is comparatively strict, by product easily causes secondary pollution etc., chemical method is also subject to certain restrictions in the application; Utilize denitrifying bacteria nitrate to be degraded to the bioprocess of nitrogen, generally experience by NO
3-→ NO
2-→ NO → N
2o → N
2process, being of limited application of biological process, the more difficult control of condition and there is secondary pollution.
Adopt the sewage that ion exchange method treatment of nitric acid salt nitrogen exceeds standard, saturated ion exchange resin generally regenerates with the sodium chloride aqueous solution that mass percentage concentration is 3 ~ 5%.The regeneration waste liquid produced in regenerative process, because of the sodium-chlor containing higher concentration and nitrate radical, can not directly discharge, but is difficult to dispose.If the ion exchange method of features such as effectively cannot solving the disposal difficulties of ion exchange resin regeneration waste liquid, the maturation that possesses skills, equipment are simple, operational management is convenient, the high and working cost of nitrate removal degree is relatively low is just difficult to promote in China's sewage denitration hydrochlorate nitrogen field and application.
Summary of the invention
The present invention needs first technical problem solved to be that the utilization ratio of conventional ion exchange resin absorption effluent is not high, provides a kind of nitrate nitrogen effectively utilized in ion exchange resin absorption effluent, formulates rationally, economic and feasible treatment process.
The present invention need second technical problem solved be ion exchange resin regeneration liquid comparatively difficulty put, a kind of environmental protection, convenience and the treatment process of the ion exchange resin regeneration liquid of economy are provided.
The technical solution adopted in the present invention is: a kind of resin takes off the method for sewage effluents nitrate nitrogen, it is characterized in that, comprises the following steps:
Step 1: water is first by more medium filter, and remove the suspended substance of the overwhelming majority in water quality, colloid and particulate matter, effluent quality suspended substance controls at below 10mg/L; Effectively can prevent the blockage problem of ion exchange resin tank;
Step 2: water outlet directly enters ion exchange resin tank, the mode adopting multiple resin container alternately to connect carries out removing of nitrate nitrogen; Greatly can improve the utilization ratio of resin, investment reduction cost, reduce working cost.
As preferably, the mode that the multiple resin container of employing described in step 2 is alternately connected is disposed of sewage, its specific implementation process is: by 3 groups of resin container series connection, sewage is first by 1, No. 2 resin container, when No. 2 resin container water outlets reach the threshold value of standard, by the stream of sewage instead by 2, No. 3 resin containers, No. 1 resin container resin now carries out on-line regeneration; When No. 3 resin container water outlets reach the threshold value of standard, by the stream of sewage instead by 3, No. 1 resin containers, No. 2 resin container resins now carry out on-line regeneration; When No. 1 resin container water outlet reaches the threshold value of standard, by the stream of sewage instead by 1, No. 2 resin container, No. 3 resin container resins now carry out on-line regeneration; Subsequent process carries out according to aforementioned process circulation.
As preferably, described resin carries out on-line regeneration, and its specific implementation process is that the salt solution of employing 5% regenerates, and uses the whole resin layer of deionized water drip washing afterwards.
As preferably, adopt the flow velocity of 5% salt solution regenerating resin to be 4BV/h, the recovery time is 1.5 ~ 2h.
As preferably, after adopting 5% salt solution regenerating resin, use the deionized water drip washing resin layer 1h of flow velocity 20BV/h.
A kind of resin takes off the method for the resin regeneration liquid process after sewage effluents nitrate nitrogen, it is characterized in that: first cultivate domestication salt tolerant denitrification reactor, ion exchange resin regeneration liquid (about 15L) is delivered in the salt tolerant denitrification reactor cultivated and tamed, add the carbon source of corresponding proportion simultaneously, process ion exchange resin regeneration liquid, the regenerated liquid after denitrification process is directly back to anaerobism or the anoxic pond of Sewage Plant.
As preferably, described cultivation domestication salt tolerant denitrification reactor, its detailed process is that the active sludge of municipal sewage plant is added to salt tolerant denitrification reactor, add nitrate nitrogen and carbon source simultaneously, wherein the BOD absolute magnitude of carbon source is 4 times of nitrate nitrogen absolute magnitude in water inlet regenerated liquid, control dissolved oxygen to 6 ~ 8, carries out the enrichment culture of denitrifying bacterium at 0.1 ~ 0.5mg/L, pH; Follow-up progressively raising saltpetre and sodium-chlor dosage, thus improve nitrate nitrogen content and the saltiness of salt tolerant denitrification reactor, until system nitrate nitrogen content is at 600mg/L, saltiness is about 2%.
As preferably, ion exchange resin regeneration liquid is delivered in the salt tolerant denitrification reactor cultivated and tamed, adds the carbon source of corresponding proportion simultaneously, control dissolved oxygen at 0.1 ~ 0.5mg/L, after reaction 20h, within the nitrate nitrogen of water outlet can reach 30mg/L.
The present invention first adopts suspended substance in more medium filter water quality treatment, the mode of series connection is replaced again by multiple ion exchange resin tank, improve the utilization ratio of unit volume resin, thus the nitrate nitrogen effectively removed in sewage, this processing unit is simple to operation, can reduce cost of investment and running cost.Adopt the UASB salt tolerant denitrification reactor of special domestication, effectively removes the nitrate nitrogen in regenerated liquid, regenerated liquid after process is back to anaerobism or the anoxic pond of Sewage Plant, whole treating processes does not produce any pollution substance, and on original sewage treatment process and system without any obvious impact.Nitrate nitrogen denitrification converted product nitrogen directly can be disposed to air, and whole treatment process process does not cause any pollutant emission in environment.Whole treatment process and method do not cause the outer row of any pollutent to environment.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment 1:
Get the existing water outlet of Wuhan sewage treatment plants A as experiment water inlet, conventional water-quality guideline is as following table 1:
Table 1 sewage work A effluent index
| ? | COD（mg/L） | Ammonia nitrogen (mg/L) | Nitrate nitrogen (mg/L) | Total phosphorus (mg/L) |
| A sewage effluents | 30 | 0.28 | 10.4 | 0.60 |
Experimental procedure one: special nitrate removal resin is made three internal diameter 40mm, packing height is the resin column of 400mm, first by the series connection of 1, No. 2 resin column, adopt peristaltic pump by sewage transport to resin column top, under certain power, make that sewage is top-down passes through resin column.Coutroi velocity is at 40BV/h.
Experimental procedure two: the water outlet nitrate nitrogen concentration analyzing the second tree fat of each series connection, when water outlet nitrate nitrogen concentration is more than 2mg/L, thinks that first resin adsorbs saturated completely, and now changeable is 2, No. 3 resin column series connection, continues water inlet.Be table 2 by the effluent quality index of ion exchange resin:
Table 2 flows through resin effluent index
| ? | COD（mg/L） | Ammonia nitrogen (mg/L) | Nitrate nitrogen (mg/L) | Total phosphorus (mg/L) |
| Flow through resin water outlet | 18 | 0.21 | 2.0 within | 0.41 |
Experimental procedure three: meanwhile, No. 1 resin column can adopt 5% salt solution to carry out regeneration of ion-exchange resin.The process of the homo-ion exchange of operation of regeneration is basically identical, and only water inlet need be changed into the salt solution of 5%, flow velocity during regeneration should change 4BV/h into, and the recovery time is 2h.Resin column after regeneration needs with the whole resin column of deionized water drip washing.Regeneration of ion-exchange resin liquid is referred to as after the waste water mixing that whole regenerated liquid process produces.
Experimental procedure four: the process of ion exchange resin regeneration liquid.First be cultivate salt tolerant denitrification reactor: the active sludge of municipal sewage plant is added to salt tolerant denitrification reactor, add concentration is the nitrate nitrogen of 100mg/L and the BOD of 400mg/L simultaneously, control dissolved oxygen to 6 ~ 8, carries out the enrichment culture of denitrifying bacterium at 0.1 ~ 0.5mg/L, pH.Follow-uply progressively will improve saltpetre and sodium-chlor dosage, thus improve nitrate nitrogen content and the saltiness of salt tolerant denitrification reactor.Until system nitrate nitrogen content is at 600mg/L, saltiness is about 2%.
Experimental procedure five: ion exchange resin regeneration liquid (about 15L) is delivered in the salt tolerant denitrification reactor cultivated and tamed, add the carbon source of corresponding proportion simultaneously, control dissolved oxygen at 0.1 ~ 0.5mg/L, after reaction 20h, within the nitrate nitrogen of water outlet can reach 30mg/L.
Regenerated liquid after denitrogenation is directly back to anaerobism or the anoxic pond of Sewage Plant, because regeneration liquid measure is relative to very little the whole Sewage Plant water yield, it can not produce obvious change to whole wastewater influent.Regenerated liquid all can be back to Sewage treatment systems, therefore can not cause secondary pollution to environment.
This result shows that salt tolerant denitrification reactor also can have comparatively fast high concentration nitrate nitrogen, higher removal effect.Nitrate nitrogen denitrification converted product nitrogen directly can be disposed to air, and whole treatment process process does not cause any pollutant emission in environment.
Embodiment 2:
Get the existing water outlet of Wuhan sewage work B as experiment water inlet, conventional water-quality guideline is as following table 3:
Table 3 sewage work B effluent index
| ? | COD（mg/L） | Ammonia nitrogen (mg/L) | Nitrate nitrogen (mg/L) | Total phosphorus (mg/L) |
| A sewage effluents | 36 | 0.50 | 17.9 | 0.37 |
Experimental procedure one: special nitrate removal resin is made three internal diameter 40mm, packing height is the resin column of 400mm, first by the series connection of 1, No. 2 resin column, adopt peristaltic pump by sewage transport to resin column top, under certain power, make that sewage is top-down passes through resin column.Coutroi velocity is at 20BV/h.
Experimental procedure two: the water outlet nitrate nitrogen concentration analyzing the second tree fat of each series connection, when water outlet nitrate nitrogen concentration is more than 2mg/L, thinks that first resin adsorbs saturated completely, and now changeable is 2, No. 3 resin column series connection, continues water inlet.Be table 4 by the effluent quality index of ion exchange resin:
Table 4 flows through resin effluent index
| ? | COD（mg/L） | Ammonia nitrogen (mg/L) | Nitrate nitrogen (mg/L) | Total phosphorus (mg/L) |
| Flow through resin water outlet | 22 | 0.35 | 2.0 within | 0.22 |
Experimental procedure three: meanwhile, No. 1 resin column can adopt 5% salt solution to carry out regeneration of ion-exchange resin.The process of the homo-ion exchange of operation of regeneration is basically identical, and only water inlet need be changed into the salt solution of 5%, flow velocity during regeneration should change 4BV/h into, and the recovery time is 1.5h.Resin column after regeneration needs with the whole resin column of deionized water drip washing.Regeneration of ion-exchange resin liquid is referred to as after the waste water mixing that whole regenerated liquid process produces.
Experimental procedure four: the process of ion exchange resin regeneration liquid.This treatment process is with the experimental procedure four of embodiment 1 and experimental procedure five.
Should be understood that, the part that this specification sheets does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to scope of patent protection of the present invention can not be thought; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that the claims in the present invention protect; can also make and replacing or distortion, all fall within protection scope of the present invention, request protection domain of the present invention should be as the criterion with claims.
Claims (8)
1. resin takes off a method for sewage effluents nitrate nitrogen, it is characterized in that, comprises the following steps:
Step 1: water is first by more medium filter, and remove the suspended substance of the overwhelming majority in water quality, colloid and particulate matter, effluent quality suspended substance controls at below 10mg/L;
Step 2: water outlet directly enters ion exchange resin tank, the mode adopting multiple resin container alternately to connect carries out removing of nitrate nitrogen.
2. resin according to claim 1 takes off the method for sewage effluents nitrate nitrogen, it is characterized in that: the mode that the multiple resin container of the employing described in step 2 is alternately connected is disposed of sewage, its specific implementation process is: by 3 groups of resin container series connection, sewage is first by 1, No. 2 resin container, when No. 2 resin container water outlets reach the threshold value of standard, by the stream of sewage instead by 2, No. 3 resin containers, No. 1 resin container resin now carries out on-line regeneration; When No. 3 resin container water outlets reach the threshold value of standard, by the stream of sewage instead by 3, No. 1 resin containers, No. 2 resin container resins now carry out on-line regeneration; When No. 1 resin container water outlet reaches the threshold value of standard, by the stream of sewage instead by 1, No. 2 resin container, No. 3 resin container resins now carry out on-line regeneration; Subsequent process carries out according to aforementioned process circulation.
3. resin according to claim 2 takes off the method for sewage effluents nitrate nitrogen, it is characterized in that: described resin carries out on-line regeneration, and its specific implementation process is that the salt solution of employing 5% regenerates, and uses the whole resin layer of deionized water drip washing afterwards.
4. resin according to claim 3 takes off the method for sewage effluents nitrate nitrogen, it is characterized in that: adopt the flow velocity of 5% salt solution regenerating resin to be 4BV/h, the recovery time is 1.5 ~ 2h.
5. resin according to claim 3 takes off the method for sewage effluents nitrate nitrogen, it is characterized in that: the deionized water drip washing resin layer 1h using flow velocity 20BV/h after adopting 5% salt solution regenerating resin.
6. a resin takes off the method for the resin regeneration liquid process after sewage effluents nitrate nitrogen, it is characterized in that: first cultivate domestication salt tolerant denitrification reactor, ion exchange resin regeneration liquid is delivered in the salt tolerant denitrification reactor cultivated and tamed, add the carbon source of corresponding proportion simultaneously, process ion exchange resin regeneration liquid, the regenerated liquid after denitrification process is directly back to anaerobism or the anoxic pond of Sewage Plant.
7. the method for resin regeneration liquid according to claim 6 process, it is characterized in that: described cultivation domestication salt tolerant denitrification reactor, its detailed process is that the active sludge of municipal sewage plant is added to salt tolerant denitrification reactor, add nitrate nitrogen and carbon source simultaneously, wherein the BOD absolute magnitude of carbon source is 4 times of nitrate nitrogen absolute magnitude in water inlet regenerated liquid, control dissolved oxygen to 6 ~ 8, carries out the enrichment culture of denitrifying bacterium at 0.1 ~ 0.5mg/L, pH; Follow-up progressively raising saltpetre and sodium-chlor dosage, thus improve nitrate nitrogen content and the saltiness of salt tolerant denitrification reactor, until system nitrate nitrogen content is at 600mg/L, saltiness is about 2%.
8. the method for resin regeneration liquid according to claim 6 process, it is characterized in that: ion exchange resin regeneration liquid is delivered in the salt tolerant denitrification reactor cultivated and tamed, add the carbon source of corresponding proportion simultaneously, control dissolved oxygen at 0.1 ~ 0.5mg/L, after reaction 20h, within the nitrate nitrogen of water outlet can reach 30mg/L.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036495A (en) * | 2015-09-09 | 2015-11-11 | 南京大学 | Method for removing nitrate nitrogen in water through ion exchange and denitrification integration |
| CN106746178A (en) * | 2016-11-23 | 2017-05-31 | 南京华淳环保股份有限公司 | A kind of sewage deep denitrification process based on the transfer of nitrate nitrogen Chemical Decomposition physics |
| CN106892543A (en) * | 2017-04-28 | 2017-06-27 | 南京环保产业创新中心有限公司 | The method that depth removes Coal Gas Washing Cycling Water nitrate nitrogen |
| CN108218153A (en) * | 2018-03-27 | 2018-06-29 | 湖北君集水处理有限公司 | A kind of system and method for sewage plant Tailwater Depth processing |
| CN108314269A (en) * | 2018-04-04 | 2018-07-24 | 湖北君集水处理有限公司 | A kind of system and method for macropore denitrogenation acid-basic regenerated waste liquids in water processing and reuse |
| CN108341556A (en) * | 2018-04-20 | 2018-07-31 | 湖北君集水处理有限公司 | A kind of advanced treatment of wastewater and the system and method for acid-basic regenerated waste liquids in water reuse |
| CN108585344A (en) * | 2018-03-09 | 2018-09-28 | 湖北君集水处理有限公司 | A kind of system and method for resin adsorption denitrogenation and acid-basic regenerated waste liquids in water reuse |
| CN108862472A (en) * | 2018-07-04 | 2018-11-23 | 南京大学 | A kind of advanced waste treatment method of ion exchange resin and the integrated removing nitrate nitrogen of electrochemistry |
| CN110040865A (en) * | 2018-01-17 | 2019-07-23 | 宁波春秋环保工程有限公司 | A kind of pickling waste waters processing method and its nitrate treatment device rich in nitrate |
| CN110304759A (en) * | 2019-06-28 | 2019-10-08 | 湖北君集水处理有限公司 | A kind of system and method using denitrification processing acid-basic regenerated waste liquids in water |
| CN111018268A (en) * | 2019-12-31 | 2020-04-17 | 南京大学 | Resin coupling denitrification method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036495A (en) * | 2015-09-09 | 2015-11-11 | 南京大学 | Method for removing nitrate nitrogen in water through ion exchange and denitrification integration |
| CN105036495B (en) * | 2015-09-09 | 2017-03-15 | 南京大学 | A kind of ion exchange and the integrated method for removing nitrate nitrogen in eliminating water of denitrification |
| CN106746178A (en) * | 2016-11-23 | 2017-05-31 | 南京华淳环保股份有限公司 | A kind of sewage deep denitrification process based on the transfer of nitrate nitrogen Chemical Decomposition physics |
| CN106746178B (en) * | 2016-11-23 | 2020-03-20 | 南京华淳环保股份有限公司 | Advanced sewage denitrification process based on chemical separation-physical transfer of nitrate and nitrogen |
| CN106892543A (en) * | 2017-04-28 | 2017-06-27 | 南京环保产业创新中心有限公司 | The method that depth removes Coal Gas Washing Cycling Water nitrate nitrogen |
| CN110040865A (en) * | 2018-01-17 | 2019-07-23 | 宁波春秋环保工程有限公司 | A kind of pickling waste waters processing method and its nitrate treatment device rich in nitrate |
| CN108585344A (en) * | 2018-03-09 | 2018-09-28 | 湖北君集水处理有限公司 | A kind of system and method for resin adsorption denitrogenation and acid-basic regenerated waste liquids in water reuse |
| CN108218153A (en) * | 2018-03-27 | 2018-06-29 | 湖北君集水处理有限公司 | A kind of system and method for sewage plant Tailwater Depth processing |
| CN108314269A (en) * | 2018-04-04 | 2018-07-24 | 湖北君集水处理有限公司 | A kind of system and method for macropore denitrogenation acid-basic regenerated waste liquids in water processing and reuse |
| CN108341556A (en) * | 2018-04-20 | 2018-07-31 | 湖北君集水处理有限公司 | A kind of advanced treatment of wastewater and the system and method for acid-basic regenerated waste liquids in water reuse |
| CN108862472A (en) * | 2018-07-04 | 2018-11-23 | 南京大学 | A kind of advanced waste treatment method of ion exchange resin and the integrated removing nitrate nitrogen of electrochemistry |
| CN110304759A (en) * | 2019-06-28 | 2019-10-08 | 湖北君集水处理有限公司 | A kind of system and method using denitrification processing acid-basic regenerated waste liquids in water |
| CN111018268A (en) * | 2019-12-31 | 2020-04-17 | 南京大学 | Resin coupling denitrification method |
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