CN103601291B - A kind of method for the treatment of low carbon-nitrogen ratio sewage and denitrification filtration system - Google Patents
A kind of method for the treatment of low carbon-nitrogen ratio sewage and denitrification filtration system Download PDFInfo
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Abstract
The present invention discloses a kind of method for the treatment of low carbon-nitrogen ratio sewage and denitrification filtration system, and described system comprises equalizing tank, lift pump, denitrification pond and water collecting basin; Described lift pump is arranged between described equalizing tank and denitrification pond, described lift pump is provided with feed-water end and water side, and the feed-water end of described lift pump is connected with described equalizing tank by pipeline, and the water side of described lift pump is connected with described denitrification pond; Described denitrification pond is connected by pipeline with water collecting basin; Waterflooding layer, slow release carbon source layer, packing layer, anti seepage membrane and supporting layer is disposed with from top to bottom in described denitrification pond.The present invention is applicable to the low carbon-nitrogen ratio sewages such as secondary municipal wastewater treatment plant water outlet, and system device is simple, convenient operation and management and non-secondary pollution.And add wide material sources, the release of cheap, carbon source is slow and easy to control, improve the removal to nitre nitrogen and total nitrogen by the process in intensified anti-nitrated stage, improve the processing power of whole technique.
Description
Technical field
The present invention relates to environmental engineering water-treatment technology field, particularly relate to a kind of method for the treatment of low carbon-nitrogen ratio sewage and denitrification filtration system.
Background technology
The water outlet TN concentration requirement of city B-grade sewage factory is lower than " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard, and namely water outlet TN concentration is less than 15mg/L.Along with rapid development of economy, nitrogen and organicly constantly to leak into, cause lake, reservoir water body worsens increasingly, body eutrophication problem is quite outstanding.Polluted by nitrogen controls more and more to come into one's own, and becomes current and the vital task of a water pollution control job in period from now on.City B-grade sewage plant effluent feature is that the nitrogen in sewage is most of with NO
3 --N form exists, and small portion is with NH
3-N form exists.In this type of sewage, organic carbon content is lower, is not easily utilized by denitrifying bacterium, is difficult to meet the demand to carbon source in denitrification process, causes nitric efficiency lower.
In biological denitrification filtration system, denitrifying bacterium can utilize carbon source as electron donor, NO
3 -nitrate reduction is become N as electron acceptor(EA) by-N
2, reach the object of denitrogenation.Many scholars carry out denitrifying research and probe by adding the liquid carbon source such as methyl alcohol, glucose, but adding these carbon sources, easily to cause carbon source to add not enough or excessive, not only increases denitrification cost, system cloud gray model is complicated and secondary pollution problem is more outstanding.Thus, many investigators find nontoxic, cheap solid-state carbon source by number of ways and replace conventional liquid carbon source in recent years.Solid carbon source is broadly divided into two classes: a class is natural materials, the material of the rich cellulose such as such as rice husk, corn cob and ageing rice; Another kind of is by the polymkeric substance of synthetic, as PBS (poly butylene succinate), PHB (poly-β-hydroxybutyric acid) etc.Solid slow-release carbon source has the feature of slow release carbon source, ensures that the sustainable of anti-nitration reaction carries out, and its research is subject to people's favor gradually.
" 12 " period more and more stricter to contaminant transport model, municipal effluent plant effluent TN concentration only needed to reach 15mg/L in the past, was difficult to meet under the new situation to the control overflow of pollutent.In order to prevent the aggravation of body eutrophication, water outlet TN concentration need maintain (below 5mg/L) within lower scope, therefore in the urgent need to treatment process that is easy to operate, effective, low cost.Therefore, the treatment technology of existing low carbon-nitrogen ratio sewage has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of method for the treatment of low carbon-nitrogen ratio sewage and denitrification filtration system, be intended to solve the prior art problem lower to low carbon-nitrogen ratio sewage nitric efficiency.
Technical scheme of the present invention is as follows:
For the treatment of a denitrification filtration system for low carbon-nitrogen ratio sewage, wherein, described denitrification filtration system is run continuously for 24 hours, and whole system comprises equalizing tank, lift pump, denitrification pond and water collecting basin;
Described lift pump is arranged between described equalizing tank and denitrification pond, described lift pump is provided with feed-water end and water side, and the feed-water end of described lift pump is connected with described equalizing tank by pipeline, and the water side of described lift pump is connected with described denitrification pond; Described denitrification pond is connected by pipeline with water collecting basin;
Waterflooding layer, slow release carbon source layer, packing layer, anti seepage membrane and supporting layer is disposed with from top to bottom in described denitrification pond.
The described denitrification filtration system for the treatment of low carbon-nitrogen ratio sewage, wherein, the slow release carbon source layer top layer in described denitrification pond is provided with water-distributing device, is provided with captation at the bottom of the pond in described denitrification pond; Described water-distributing device is connected by the water side of pipeline with described lift pump; Described captation is connected by pipeline with described water collecting basin.
The described denitrification filtration system for the treatment of low carbon-nitrogen ratio sewage, wherein, the height of described waterflooding layer is 0.3-0.4m; The height of described slow release carbon source layer is 2-5mm; The height of described packing layer is 0.8-1.4m; The height of described supporting layer is 0.3-0.5m.
The described denitrification filtration system for the treatment of low carbon-nitrogen ratio sewage, wherein, is filled with thick river sand in described packing layer, the particle diameter of described thick river sand is 2-4mm; Be filled with gravel in described supporting layer, the particle diameter of gravel is 20-50mm; Be filled with in rice husk, corn cob and ageing rice in described slow release carbon source layer one or more.
The described denitrification filtration system for the treatment of low carbon-nitrogen ratio sewage, wherein, water-distributing device in described denitrification pond is responsible for by water distribution and is formed with the parallel several water distribution branch pipes be equally spaced in slow release carbon source layer top layer, and each water distribution branch pipe is tiltedly gone up 60 ° and is evenly provided with several water distributing pore; Described captation is made up of with the parallel several headers be equally spaced bottom supporting layer the supervisor that catchments, and each collection branch pipe pipe bottom evenly arranges several gully-hole.
The described denitrification filtration system for the treatment of low carbon-nitrogen ratio sewage, wherein, described anti seepage membrane is HDPE anti seepage membrane, and the thickness of HDPE anti seepage membrane is 0.5-2.5mm.
The described denitrification filtration system for the treatment of low carbon-nitrogen ratio sewage, wherein, described water collecting basin is provided with water-in and water outlet, and described water-in is connected by pipeline with the captation in described denitrification pond; The water outlet of described water collecting basin is connected with the discharge outlet of sewage by pipeline.
Adopt a method for denitrification filtration system process low carbon-nitrogen ratio sewage as above, wherein, comprise the steps:
Sewage enters equalizing tank, even water quality and quantity in equalizing tank;
Sewage in equalizing tank pumps into denitrification pond by lift pump, and the sewage entered in denitrification pond evenly flows in the waterflooding layer in denitrification pond by water-distributing device, then by diafiltration successively by the slow release carbon source layer in denitrification pond, packing layer and supporting layer;
Sewage is collected by the captation bottom supporting layer, and flow in water collecting basin, discharges finally by water outlet.
The method of described process low carbon-nitrogen ratio sewage, wherein, sewage hydraulic detention time in described denitrification pond is 2-4h.
The method of described process low carbon-nitrogen ratio sewage, wherein, in described slow release carbon source layer, the cycle that adds of slow release carbon source is 20-40 days; Filling surface attached biological film in described packing layer, for the carbon source utilizing slow release carbon source layer to discharge, carries out denitrification denitrogenation.
Beneficial effect: the denitrification filtration system in the present invention take low carbon-nitrogen ratio sewage as object, using microorganism as main body, controls DO concentration in denitrification filtration system and is less than 0.5mg/L, create the anaerobic environment being beneficial to anti-nitration reaction; By adding the slow release carbon source needed for anti-nitration reaction, microorganism can on filler growth and breeding, within the shorter residence time, effectively remove the pollutents such as the nitrogen in sewage; The present invention is applicable to the low carbon-nitrogen ratio sewage process such as secondary municipal wastewater treatment plant water outlet, and system device is simple, convenient operation and management and non-secondary pollution.The denitrification filtration system of process low carbon-nitrogen ratio sewage provided by the invention and method, not only technical costs is low, total nitrogen removal effect is good, and significantly strengthens organism, good in nitrate nitrogen removal effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention for the treatment of the denitrification filtration system of low carbon-nitrogen ratio sewage.
Fig. 2 is the structural representation of the water-distributing device of denitrification filtration system.
Embodiment
The invention provides a kind of method for the treatment of low carbon-nitrogen ratio sewage and denitrification filtration system, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The present invention, in order to solve the problem of low carbon-nitrogen ratio sewage process, provides a kind of technology being main process cell processing low carbon-nitrogen ratio sewage with equalizing tank, denitrification pond and water collecting basin.Described low-carbon (LC) is more most of than the nitrogen in sewage with NO
3 --N form exists, and small portion is with NH
3-N form exists, and described low-carbon (LC) is lower than nitrate concentration in sewage, and nitrate concentration is no more than 30mg/L, organic content is low, and described organic concentration is no more than 150mg/L, is not easily utilized by denitrifying bacterium, be difficult to meet the demand to carbon source in denitrification process, cause nitric efficiency lower.
Denitrification filtration system for the treatment of low carbon-nitrogen ratio sewage provided by the present invention, as shown in Figure 1, comprises equalizing tank 100, lift pump 200, denitrification pond 300 and water collecting basin 400;
Described lift pump 200 is arranged between described equalizing tank 100 and denitrification pond 300, described lift pump 200 is provided with feed-water end and water side, the feed-water end of described lift pump 200 is connected with described equalizing tank 100 by pipeline, the water side of described lift pump 200 is connected with described denitrification pond 300, like this, the sewage in described equalizing tank 100 just can pump in denitrification pond 300 by lift pump 200; Described denitrification pond 300 is connected by pipeline with water collecting basin 400.
Waterflooding layer 310, slow release carbon source layer 330, packing layer 340, anti seepage membrane 370 and supporting layer 350 is disposed with from top to bottom in described denitrification pond 300; Slow release carbon source layer 330 top layer in described denitrification pond 300 is provided with water-distributing device 320, and the described end, denitrification pond 300 is provided with the bottom that captation 360(is arranged on supporting layer 350).Described water-distributing device 320 is connected by the water side of pipeline with described lift pump 200, and like this, it is inner that the sewage in equalizing tank 100 enters described denitrification pond 300 by described water-distributing device 320.
Described water collecting basin 400 is provided with water-in and water outlet, and described water-in is connected by pipeline with the captation 360 in described denitrification pond 300.Preferably, described water-in is arranged on the bottom of water collecting basin 400, and described water outlet is arranged on the upper end of water collecting basin 400, and the water outlet of described water collecting basin 400 is connected with the discharge outlet of sewage by pipeline.
Wherein, in described denitrification pond 300, the height of waterflooding layer 310 is 0.3-0.4m, and the height of slow release carbon source layer 330 is 2-5mm, and the height of packing layer 340 is 0.8-1.4m, and the height of supporting layer 350 is 0.3-0.5m.Be filled with thick river sand in described packing layer 340, sand grains footpath, thick river is 2-4mm; Supporting layer 350 fills gravel, and grain size of gravel is 20-50mm.One or more solid slow-release carbon sources in rice husk, corn cob and ageing rice are filled with in described slow release carbon source layer 330, above-mentioned solid slow-release carbon source has the slow and feature such as easy to control of wide material sources, the release of cheap, carbon source, and slow release carbon source makes to be reduced to about 0.4mg/L into the concentration of the dissolved oxygen in water by 5.0mg/L.The cycle that adds of solid slow-release carbon source is 20-40 days.Described anti seepage membrane 370 is HDPE anti seepage membrane, and the thickness of HDPE anti seepage membrane is 0.5-2.5mm, is layed on supporting layer 350.
Water-distributing device 320 in described denitrification pond 300 is responsible for 311 by water distribution and is formed with the parallel several water distribution branch pipes 312 be equally spaced in slow release carbon source layer 330 top layer, and each water distribution branch pipe 312 is provided with multiple water distributing pore 313 for water distribution.Preferably, described each water distribution branch pipe 312 is tiltedly gone up 60 ° and is evenly arranged several water distributing pore 313.
Captation 360 in described denitrification pond 300 is made up of with the parallel several collection branch pipe be equally spaced bottom supporting layer 350 supervisor that catchments, and each collection branch pipe bottom is uniformly distributed several gully-hole; The described supervisor that catchments is connected with water collecting basin 400 water-in by pipeline; Water outlet is connected by pipeline with water port.
A kind of method adopting above-mentioned denitrification filtration system to carry out processing low carbon-nitrogen ratio sewage is also provided in the present invention, comprises the steps:
1. sewage enters equalizing tank, even water quality and quantity in equalizing tank;
2. the sewage in equalizing tank pumps into denitrification pond by lift pump: lift pump is responsible for the water distribution of the water-distributing device in denitrification pond and is connected, and sewage is by water distribution branch pipe water distribution uniformity; The sewage entered in denitrification pond evenly flows in the waterflooding layer in denitrification pond by water-distributing device, then by diafiltration successively by the slow release carbon source layer in denitrification pond, packing layer and supporting layer: in denitrification pond, hydraulic detention time is 2-4h;
3. sewage is collected by the supervisor that catchments bottom supporting layer, and flow in water collecting basin, discharges finally by water outlet.
Wherein, in denitrification device, waterflooding layer completely cuts off air, makes waterflooding layer lower part be in anaerobic environment; In slow release carbon source layer, filler can discharge carbon source, and it is 20-40 days that filler adds the cycle; Filling surface attached biological film in packing layer, under anaerobic environment, utilizes the carbon source that slow release carbon source layer discharges, carries out denitrification denitrogenation.
Device of the present invention by aqueous process streams to order be made up of equalizing tank, denitrification pond and equalizing tank.Equalizing tank be used for homogenizing water inlet water quality and quantity, ensure water inlet continous-stable.Add natural solid slow release carbon source in denitrification pond, improve organic concentration in water inlet, providing the carbon source needed for microorganism denitrification, is the key link of degradation of sewage denitrogenation.The denitrification residence time is 2-4h, and water collecting basin mainly collects water outlet, concentrates discharge.
In denitrification pond, the selection of slow release carbon source and dosage, the cycle of adding are the key factors affecting low carbon-nitrogen ratio sewage decontamination effect improving.Denitrification refers to that denitrifying bacterium is by nitrate nitrogen (NO under the condition of anaerobic or hypoxemia
3 --N) and nitrite nitrogen (NO
2 --N) be reduced into gaseous nitrogen (N
2or N
2o) journey, most of denitrifying bacterium is heterotrophic bacterium, and they take organism as carbon source and the energy, carry out anaerobic respiration, and thus in low carbon-nitrogen ratio sewage, the amount of carbon source is the determinative affecting denitrification denitrogenation effect.One or more natural solid slow release carbon source in the present invention in preferred rice husk, corn cob and ageing rice, described slow release carbon source releases carbon rate stabilization, and raw material is extensive, cheap and easy to get.The dosage of slow release carbon source needs to decide according to the concentration of nitrate from waste water nitrogen, nitrite nitrogen and DO, and specific formula for calculation is as follows:
In formula:
for the organism amount needed, mg/L; [NO
3 --N] be the concentration of nitric nitrogen in sewage, mg/L; [NO
2 --N] be the concentration of Nitrite In Polluted Water nitric nitrogen, mg/L; DO is the concentration of dirty oxygen in water, mg/L.
The cycle that adds of slow release carbon source decides according to the carbon speed of releasing of slow release carbon source self, it is 20-40 days that the slow release carbon source that the rice husk selected in the utility model, corn cob and ageing rice combine adds the cycle, and slow release carbon source makes to be reduced to about 0.4mg/L into the concentration of the dissolved oxygen in water by 5.0mg/L.
In denitrification pond, the height of packing layer is the another one factor affecting low carbon-nitrogen ratio sewage decontamination effect improving.Under normal circumstances, bed stuffing height is larger, and the water environment capacity of system is stronger, and hydraulic detention time is also longer, and effluent quality will be better; But packing layer is thicker, investment cost is also higher.The thickness of packing layer, according to the hydraulic surface loading of system, the infiltration coefficient of filler and denitrifying action time, is determined 0.8-1.4m by investigator of the present invention.
In denitrification pond, the particle diameter selection of packing layer filler is the key factor of influential system steady running.In the process of system stable operation, denitrifying bacteria can form one deck microbial film in filling surface attachment, if the particle diameter of filler is too small, the microbial film of attachment can reduce the hole of filler, difficulty is oozed under causing the sewage flooding layer, system water outlet reduces, and the gas that denitrification process produces simultaneously is also difficult to infiltration filtrate and discharges the water surface; But packing material size is excessive, for the specific surface area of attached growth of microorganisms can reduce, infiltration coefficient can raise greatly, and hydraulic detention time reduces, and sewage can not get effective process.Investigator of the present invention is 2-5mm according to the particle diameter of previous experiments running condition determination packing layer filler, and the residence time in denitrification pond is 2-4h.
Embodiment
Denitrification filtration system provided by the present invention is applied in the advanced treatment of Shenzhen's sewage treatment plant tail water, Sewage Plant water inlet is sanitary sewage, and comprise equalizing tank, intake pump, denitrification pond and water collecting basin denitrification filtration system that sewage disposal plant effluent enters as shown in Figure 1 carry out advanced treatment.
System influent quality situation is: COD
crbe 2-10mg/L for 20-40mg/L, TN are 15-30mg/L, SS, pH value is 6.8-7.5, water temperature 15-25 DEG C.
Equalizing tank utilizes the clean water basin of sewage work to form, and adopt brick mix structure, underground type, is of a size of long 3m, wide 3m, dark 2.5m, and useful volume is 20m
3.The feed-water end of lift pump is arranged in equalizing tank, and water side connects the water-distributing device in denitrification pond.
Denitrification pond is brick mix structure, and semi-underground type is of a size of long 2m, wide 2m, dark 2.2m, and useful volume is 8m
3; The Chi Ding in denitrification pond is provided with water inlet, and water inlet connects water-distributing device, and as shown in Figure 2, be responsible for by water distribution and form with the parallel several water distribution branch pipes be equally spaced in packing layer top, each water distribution branch pipe tiltedly goes up 60 °, and evenly to arrange water distributing pore several for water-distributing device;
Be disposed with waterflooding layer, slow release carbon source layer, packing layer and supporting layer in pond, denitrification pond from top to bottom, the height of waterflooding layer is 0.3m, and the height of slow release carbon source layer is 3mm, and the height of packing layer is 1.2m, and the height of supporting layer is 0.3m; Fill ageing rice in slow release carbon source layer, it is 2-4mm thick river sand that packing layer is filled with particle diameter, and it be 20-50mm gravel anti seepage membrane thickness is 2mm that supporting layer is filled with particle diameter, and the hydraulic surface loading in denitrification pond is 3m
3/ m
2d.
Water collecting basin is that brick mixes underground type structure, and its water outlet is connected with sewage work final outflow water discharge tube.
System effluent quality situation is: COD
crbe 0-5mg/L for 10-50mg/L, TN are 2-8mg/L, SS, pH value is 6.8-7.5, water temperature 15-25 DEG C.
Compared with prior art, the advantage that has of the present invention:
1. the denitrification filtration system in the present invention, using microorganism as main body, arranges supporting layer, packing layer in denitrification device, slow release carbon source layer and waterflooding layer, the common required condition forming anti-nitration reaction;
2. the denitrification filtration system in the present invention adds solid slow-release carbon source, for denitrification process provides the carbon source material of sustainable use, greatly can reduce the DO concentration in water inlet;
3. the denitrification filtration system residence time in the present invention is 2-4h, ensure that the NO of within a short period of time effectively in the water outlet of decontaminated water treatment plant
3 -the material such as-N, TN, saves system footprint area.
4, the denitrification filtration system in the present invention can run for 24 hours continuously, and sewage treating efficiency is high and maintenance cost is lower.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (2)
1. for the treatment of a denitrification filtration system for low carbon-nitrogen ratio sewage, it is characterized in that, described denitrification filtration system is run continuously for 24 hours, and whole system comprises equalizing tank, lift pump, denitrification pond and water collecting basin; Described lift pump is arranged between described equalizing tank and denitrification pond, described lift pump is provided with feed-water end and water side, and the feed-water end of described lift pump is connected with described equalizing tank by pipeline, and the water side of described lift pump is connected with described denitrification pond; Described denitrification pond is connected by pipeline with water collecting basin;
Waterflooding layer, slow release carbon source layer, packing layer, anti seepage membrane and supporting layer is disposed with from top to bottom in described denitrification pond;
The height of described packing layer is 0.8-1.4m;
Be filled with thick river sand in described packing layer, the particle diameter of described thick river sand is 2-4mm;
Sewage hydraulic detention time in described denitrification pond is 2-4h;
The slow release carbon source layer top layer in described denitrification pond is provided with water-distributing device, is provided with captation at the bottom of the pond in described denitrification pond; Described water-distributing device is connected by the water side of pipeline with described lift pump; Described captation is connected by pipeline with described water collecting basin;
The height of described waterflooding layer is 0.3-0.4m; The height of described slow release carbon source layer is 2-5mm; The height of described supporting layer is 0.3-0.5m;
Be filled with gravel in described supporting layer, the particle diameter of gravel is 20-50mm; Be filled with in rice husk, corn cob and ageing rice in described slow release carbon source layer one or more;
Water-distributing device in described denitrification pond is responsible for by water distribution and is formed with the parallel several water distribution branch pipes be equally spaced in slow release carbon source layer top layer, and each water distribution branch pipe is evenly provided with several water distributing pore; Described captation is made up of with the parallel several headers be equally spaced bottom supporting layer the supervisor that catchments, and each collection branch pipe pipe bottom evenly arranges several gully-hole;
Described anti seepage membrane is HDPE anti seepage membrane, and the thickness of HDPE anti seepage membrane is 0.5-2.5mm;
Described water collecting basin is provided with water-in and water outlet, and described water-in is connected by pipeline with the captation in described denitrification pond; The water outlet of described water collecting basin is connected with the discharge outlet of sewage by pipeline;
The dosage specific formula for calculation of described slow release carbon source is as follows:
[NO
3 --N] be the concentration of nitric nitrogen in sewage, mg/L; [NO
2 --N] be the concentration of Nitrite In Polluted Water nitric nitrogen, mg/L;
DO is the concentration of dirty oxygen in water, mg/L.
2. adopt a method for denitrification filtration system process low carbon-nitrogen ratio sewage as claimed in claim 1, it is characterized in that, comprise the steps:
Sewage enters equalizing tank, even water quality and quantity in equalizing tank;
Sewage in equalizing tank pumps into denitrification pond by lift pump, and the sewage entered in denitrification pond evenly flows in the waterflooding layer in denitrification pond by water-distributing device, then by diafiltration successively by the slow release carbon source layer in denitrification pond, packing layer and supporting layer;
Sewage is collected by the captation bottom supporting layer, and flow in water collecting basin, discharges finally by water outlet; Sewage hydraulic detention time in described denitrification pond is 2-4h;
In described slow release carbon source layer, the cycle that adds of slow release carbon source is 20-40 days; Filling surface attached biological film in described packing layer, for the carbon source utilizing slow release carbon source layer to discharge, carries out denitrification denitrogenation.
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| CN107601665A (en) * | 2017-10-31 | 2018-01-19 | 沈阳建筑大学 | A kind of removal device and method of sewage plant tail water total nitrogen |
| CN107739095A (en) * | 2017-11-22 | 2018-02-27 | 路域生态工程有限公司 | A kind of anti-blocking medium enhanced type rapid diafiltration sewage treating system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0949206A1 (en) * | 1998-03-20 | 1999-10-13 | André Welter | Process and plant for biological denitrification of waste water |
| CN1587102A (en) * | 2004-09-23 | 2005-03-02 | 上海交通大学 | Integrated sewage treating apparatus combining biological fitler tower and underground percolation |
| CN101880082A (en) * | 2010-01-18 | 2010-11-10 | 王鹤立 | Groundwater nitrate pollution remediation technology based on semi-inert solid-phase carbon source carrier |
| CN103043786A (en) * | 2012-12-19 | 2013-04-17 | 清华大学 | Slow carbon source releasing media filter device and process with deep denitrification function |
| CN103224286A (en) * | 2013-04-09 | 2013-07-31 | 清华大学 | Ecological barrier column and method for removing underground subsurface flow pollution |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0949206A1 (en) * | 1998-03-20 | 1999-10-13 | André Welter | Process and plant for biological denitrification of waste water |
| CN1587102A (en) * | 2004-09-23 | 2005-03-02 | 上海交通大学 | Integrated sewage treating apparatus combining biological fitler tower and underground percolation |
| CN101880082A (en) * | 2010-01-18 | 2010-11-10 | 王鹤立 | Groundwater nitrate pollution remediation technology based on semi-inert solid-phase carbon source carrier |
| CN103043786A (en) * | 2012-12-19 | 2013-04-17 | 清华大学 | Slow carbon source releasing media filter device and process with deep denitrification function |
| CN103224286A (en) * | 2013-04-09 | 2013-07-31 | 清华大学 | Ecological barrier column and method for removing underground subsurface flow pollution |
Non-Patent Citations (1)
| Title |
|---|
| 不同缓释碳源对低碳氮比污水反硝化的影响;裴廷权 等;《工业水处理》;20130531;第33卷(第5期);第40页1-2段、第40-43页第1-3节 * |
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