CN105776580A - Nitrogenous fertilizer plant sewage treating agent and preparation method thereof - Google Patents
Nitrogenous fertilizer plant sewage treating agent and preparation method thereof Download PDFInfo
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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Abstract
The invention discloses a nitrogenous fertilizer plant sewage treating agent and a preparation method thereof.The nitrogenous fertilizer plant sewage treating agent is prepared from, by weight, 20-30 parts of activated sludge, 10-25 parts of kaolin, 20-30 parts of porous pelelith, 10-20 parts of waste steel slag, 1-3 parts of organic silicon oil, 15-25 parts of coarse salt, 5-10 parts of land plaster, 40-60 parts of citrate, 20-30 parts of bits of wood, 10-20 parts of xanthan gum, 5-10 parts of cellulose acetate, 2-10 parts of poly-tryptophan and 2-4 parts of microorganism biological films.By means of the nitrogenous fertilizer plant sewage treating agent, the physicochemical indexes of nitrogenous fertilizer plant sewage can reach GB18918-2002 standards, the content of COD, BOD, SS and metal ions is effectively lowered, the treating technology is simple, dosage is small, the treating effect is good, performance is stable, effluent quality is good, the water treating cost can be effectively reduced, and good economic benefits and social benefits are obtained.
Description
Technical field
The present invention relates to a kind of sewage-treating agent technical field, specifically a kind of nitrogen fertilizer plant sewage-treating agent and preparation method thereof.
Background technology
The big industry that nitrogenous fertilizer enterprises develops as National Industrial, its pollutant burden comes before chemical industry every profession and trade, and wherein discharge of wastewater is compound occupies first of chemical industry, and wherein cyanide, the total emission volumn of ammonia nitrogen occupy one at national each industrial trade.According to statistics, in the Industrial " three Waste " total emission volumn in the whole nation, the pollution of nitrogenous fertilizer enterprises accounts for 1/4th.In recent years due to the development of Nitrogenous Fertilizer Industry, Nitrogenous Fertilizer Industry is more serious to the pollution of environment.
At present, processing nitrogen fertilizer plant sewage pollution problem has various methods such as physics, chemistry, biology, but to there is treatment effect the best more for physical method, handling rate instability problem；Biological method processing cost is too high, is not suitable for promoting the use of；More employing chemical methodes process sewage, but existing sewage-treating agent, and there is secondary pollution problem in its agent formulations, also can have a certain impact environment.
Summary of the invention
It is an object of the invention to provide a kind of nitrogen fertilizer plant sewage-treating agent and preparation method thereof, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme:
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 20-30 part, Kaolin 10-25 part, porous pelelith 20-30 part, discarded slag 10-20 part, organic silicone oil 1-3 part, crude salt 15-25 part, Gypsum Fibrosum powder 5-10 part, citrate 40-60 part, wood flour 20-30 part, xanthan gum 10-20 part, cellulose acetate 5-10 part, poly-tryptophan 2-10 part, microbial biofilm 2-4 part.
As the further scheme of the present invention: described nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion it is: activated sludge 25 parts, Kaolin 18 parts, porous pelelith 25 parts, discarded 15 parts of slag, organic silicone oil 2 parts, crude salt 20 parts, Gypsum Fibrosum powder 8 parts, citrate 50 parts, wood flour 25 parts, xanthan gum 15 parts, cellulose acetate 8 parts, poly-tryptophan 6 parts, microbial biofilm 3 parts.
As the further scheme of the present invention: the granular size of described porous pelelith is 30-100 mesh.
As the further scheme of the present invention: the molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at more than 1200cp.
As the further scheme of the present invention: described microbial biofilm is that biofilm through more than 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 45%-55%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 5-10mm diameter；
(2) then, granule is mixed homogeneously with organic silicone oil, crude salt, Gypsum Fibrosum powder, citrate, wood flour, after piling up 12-24h, obtain mixture I；
(3) secondly, mixture I carries out high temperature microwave process, and the temperature that high temperature microwave processes is 200 DEG C-220 DEG C, and the time is 2h-6h, obtains mixtures II；
(4) then, mixtures II and xanthan gum, cellulose acetate, poly-tryptophan carrying out mixing stirring pulping, every kind of raw material interpolation is all spaced 3-5min, obtains mixtures III；
(5) last, mixtures III and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 2 DEG C-8 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
As the further scheme of the present invention: in step (1), the moisture content of mixture slurry is 50%.
As the further scheme of the present invention: the temperature that in step (3), mixed high temperature microwave processes is 210 DEG C, and the time is 4h.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention enables to the physical and chemical index of nitrogen fertilizer plant's sewage and reaches GB18918-2002 standard, and effectively reduces COD, BOD, SS and metal ion content；Process technique is simple, and dosage is few, and treatment effect is good, stable performance, and effluent quality is good, can significantly reduce the cost that water processes, and has good economic benefit and social benefit widely.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment 1
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 20 parts, Kaolin 10 parts, porous pelelith 20 parts, discarded 10 parts of slag, organic silicone oil 1 part, crude salt 15 parts, Gypsum Fibrosum powder 5 parts, citrate 40 parts, wood flour 20 parts, xanthan gum 10 parts, cellulose acetate 5 parts, poly-tryptophan 2 parts, microbial biofilm 2 parts；The granular size of described porous pelelith is 30-100 mesh；The molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at 1200cp；Described microbial biofilm is that biofilm through 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 45%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 5-8mm diameter；
(2) then, granule is mixed homogeneously with organic silicone oil, crude salt, Gypsum Fibrosum powder, citrate, wood flour, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out high temperature microwave process, and the temperature that high temperature microwave processes is 200 DEG C, and the time is 2h, obtains mixtures II；
(4) then, mixtures II and xanthan gum, cellulose acetate, poly-tryptophan carrying out mixing stirring pulping, every kind of raw material interpolation is all spaced 3min, obtains mixtures III；
(5) last, mixtures III and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 2 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
Embodiment 2
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 20 parts, Kaolin 10 parts, porous pelelith 25 parts, discarded 15 parts of slag, organic silicone oil 2 parts, crude salt 20 parts, Gypsum Fibrosum powder 8 parts, citrate 50 parts, wood flour 25 parts, xanthan gum 15 parts, cellulose acetate 8 parts, poly-tryptophan 6 parts, microbial biofilm 3 parts；The granular size of described porous pelelith is 30-100 mesh；The molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at 1400cp；Described microbial biofilm is that biofilm through 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 45%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 5-8mm diameter；
(2) then, granule is mixed homogeneously with organic silicone oil, crude salt, Gypsum Fibrosum powder, citrate, wood flour, after piling up 12, obtain mixture I；
(3) secondly, mixture I carries out high temperature microwave process, and the temperature that high temperature microwave processes is 200 DEG C, and the time is 2h, obtains mixtures II；
(4) then, mixtures II and xanthan gum, cellulose acetate, poly-tryptophan carrying out mixing stirring pulping, every kind of raw material interpolation is all spaced 3min, obtains mixtures III；
(5) last, mixtures III and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 6 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
Embodiment 3
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 25 parts, Kaolin 18 parts, porous pelelith 25 parts, discarded 15 parts of slag, organic silicone oil 2 parts, crude salt 20 parts, Gypsum Fibrosum powder 8 parts, citrate 50 parts, wood flour 25 parts, xanthan gum 15 parts, cellulose acetate 8 parts, poly-tryptophan 6 parts, microbial biofilm 3 parts；The granular size of described porous pelelith is 30-100 mesh；The molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at 1600cp；Described microbial biofilm is that biofilm through 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 50%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 8-10mm diameter；
(2) then, granule is mixed homogeneously with organic silicone oil, crude salt, Gypsum Fibrosum powder, citrate, wood flour, after piling up 24h, obtain mixture I；
(3) secondly, mixture I carries out high temperature microwave process, and the temperature that high temperature microwave processes is 210 DEG C, and the time is 4h, obtains mixtures II；
(4) then, mixtures II and xanthan gum, cellulose acetate, poly-tryptophan carrying out mixing stirring pulping, every kind of raw material interpolation is all spaced 4min, obtains mixtures III；
(5) last, mixtures III and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 6 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
Embodiment 4
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 30 parts, Kaolin 25 parts, porous pelelith 30 parts, discarded 20 parts of slag, organic silicone oil 3 parts, crude salt 25 parts, Gypsum Fibrosum powder 10 parts, citrate 60 parts, wood flour 30 parts, xanthan gum 20 parts, cellulose acetate 10 parts, poly-tryptophan 10 parts, microbial biofilm 4 parts；The granular size of described porous pelelith is 30-100 mesh；The molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at 1400cp；Described microbial biofilm is that biofilm through 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 50%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 5-10mm diameter；
(2) then, granule is mixed homogeneously with organic silicone oil, crude salt, Gypsum Fibrosum powder, citrate, wood flour, after piling up 12h, obtain mixture I；
(3) secondly, mixture I carries out high temperature microwave process, and the temperature that high temperature microwave processes is 200 DEG C, and the time is 2h, obtains mixtures II；
(4) then, mixtures II and xanthan gum, cellulose acetate, poly-tryptophan carrying out mixing stirring pulping, every kind of raw material interpolation is all spaced 4min, obtains mixtures III；
(5) last, mixtures III and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
Embodiment 5
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 30 parts, Kaolin 25 parts, porous pelelith 30 parts, discarded 20 parts of slag, organic silicone oil 3 parts, crude salt 25 parts, Gypsum Fibrosum powder 10 parts, citrate 60 parts, wood flour 30 parts, xanthan gum 20 parts, cellulose acetate 10 parts, poly-tryptophan 10 parts, microbial biofilm 4 parts；The granular size of described porous pelelith is 30-100 mesh；The molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at 1200cp；Described microbial biofilm is that biofilm through 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 55%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 5-10mm diameter；
(2) then, granule is mixed homogeneously with organic silicone oil, crude salt, Gypsum Fibrosum powder, citrate, wood flour, after piling up 24h, obtain mixture I；
(3) secondly, mixture I carries out high temperature microwave process, and the temperature that high temperature microwave processes is 220 DEG C, and the time is 6h, obtains mixtures II；
(4) then, mixtures II and xanthan gum, cellulose acetate, poly-tryptophan carrying out mixing stirring pulping, every kind of raw material interpolation is all spaced 5min, obtains mixtures III；
(5) last, mixtures III and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 8 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
As the further scheme of the present invention: in step (1), the moisture content of mixture slurry is 50%.
As the further scheme of the present invention: the temperature that in step (3), mixed high temperature microwave processes is 210 DEG C, and the time is 4h.
Comparative example 1
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 25 parts, Kaolin 18 parts, porous pelelith 25 parts, discarded 15 parts of slag, wood flour 25 parts, xanthan gum 15 parts, cellulose acetate 8 parts, poly-tryptophan 6 parts, microbial biofilm 3 parts；The granular size of described porous pelelith is 30-100 mesh；The molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at 1600cp；Described microbial biofilm is that biofilm through 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 50%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 8-10mm diameter；
(2) then, granule is mixed homogeneously with wood flour, after piling up 24h, obtain mixture I；
(3) secondly, mixture I carries out high temperature microwave process, and the temperature that high temperature microwave processes is 210 DEG C, and the time is 4h, obtains mixtures II；
(4) then, mixtures II and xanthan gum, cellulose acetate, poly-tryptophan carrying out mixing stirring pulping, every kind of raw material interpolation is all spaced 4min, obtains mixtures III；
(5) last, mixtures III and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 6 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
Comparative example 2
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 25 parts, Kaolin 18 parts, porous pelelith 25 parts, microbial biofilm 3 parts；The granular size of described porous pelelith is 30-100 mesh；Described microbial biofilm is that biofilm through 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 50%, subsequently porous pelelith is added, be crushed to the granule of 8-10mm diameter；
(2) then, granule and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 6 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
Comparative example 3
A kind of nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 25 parts, Kaolin 18 parts, porous pelelith 25 parts, discarded 15 parts of slag, organic silicone oil 2 parts, crude salt 20 parts, Gypsum Fibrosum powder 8 parts, citrate 50 parts, wood flour 25 parts, xanthan gum 15 parts, cellulose acetate 8 parts, poly-tryptophan 6 parts, microbial biofilm 3 parts；The granular size of described porous pelelith is 30-100 mesh；The molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at 1600cp；Described microbial biofilm is that biofilm through 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
The preparation method of a kind of nitrogen fertilizer plant sewage-treating agent, concretely comprises the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 50%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 8-10mm diameter；
(2) then, granule is mixed homogeneously with organic silicone oil, crude salt, Gypsum Fibrosum powder, citrate, wood flour, after piling up 24h, obtain mixture I；
(3) then, carrying out mixing stirring pulping by mixture I with xanthan gum, cellulose acetate, poly-tryptophan, every kind of raw material interpolation is all spaced 4min, obtains mixtures II；
(4) last, mixtures II and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 6 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
Test experience
Weigh embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 and comparative example 1 respectively, comparative example 2, each 1kg of comparative example 3 join in nitrogen fertilizer plant's sewage of 20kg, temperature control is at 25 DEG C, it is stirred continuously 1h, the effect of nitrogen fertilizer plant's sewage-treating agent of the present invention, test result table 1 is tested respectively using COD, BOD, SS, metal ion content as evaluation criterion.
As can be seen here, nitrogen fertilizer plant's sewage-treating agent of the present invention, more preferable significance treatment effect is had than innovation and creation before, the present invention enables to the physical and chemical index of nitrogen fertilizer plant's sewage and reaches GB18918-2002 standard (having reached more than one-level B standard), and effectively reduces COD, BOD, SS and metal ion content；Process technique is simple, and dosage is few, and treatment effect is good, stable performance, and effluent quality is good, can significantly reduce the cost that water processes, and has good economic benefit and social benefit widely.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing from the spirit or essential characteristics of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in the present invention.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.
Claims (8)
1. nitrogen fertilizer plant's sewage-treating agent, it is characterized in that, according to the component of weight portion be: activated sludge 20-30 part, Kaolin 10-25 part, porous pelelith 20-30 part, discarded slag 10-20 part, organic silicone oil 1-3 part, crude salt 15-25 part, Gypsum Fibrosum powder 5-10 part, citrate 40-60 part, wood flour 20-30 part, xanthan gum 10-20 part, cellulose acetate 5-10 part, poly-tryptophan 2-10 part, microbial biofilm 2-4 part.
Nitrogen fertilizer plant the most according to claim 1 sewage-treating agent, it is characterized in that, described nitrogen fertilizer plant sewage-treating agent, according to the component of weight portion be: activated sludge 25 parts, Kaolin 18 parts, porous pelelith 25 parts, discarded 15 parts of slag, organic silicone oil 2 parts, crude salt 20 parts, Gypsum Fibrosum powder 8 parts, citrate 50 parts, wood flour 25 parts, xanthan gum 15 parts, cellulose acetate 8 parts, poly-tryptophan 6 parts, microbial biofilm 3 parts.
Nitrogen fertilizer plant the most according to claim 1 sewage-treating agent, it is characterised in that the granular size of described porous pelelith is 30-100 mesh.
Nitrogen fertilizer plant the most according to claim 1 sewage-treating agent, it is characterised in that the molecular weight of described xanthan gum is at 200-400 ten thousand, and viscosity is at more than 1200cp.
Nitrogen fertilizer plant the most according to claim 1 sewage-treating agent, it is characterised in that described microbial biofilm is that biofilm through more than 48h cultivates gained on the activated carbon by thiobacillus denitrificans and mycocandida.
6. the preparation method of the nitrogen fertilizer plant's sewage-treating agent as described in claim 1-5 is arbitrary, it is characterised in that concretely comprise the following steps:
(1) first, add water in activated sludge and Kaolin and obtain mixture slurry so that it is moisture content is 45%-55%, subsequently porous pelelith, discarded slag are added, be crushed to the granule of 5-10mm diameter；
(2) then, granule is mixed homogeneously with organic silicone oil, crude salt, Gypsum Fibrosum powder, citrate, wood flour, after piling up 12-24h, obtain mixture I；
(3) secondly, mixture I carries out high temperature microwave process, and the temperature that high temperature microwave processes is 200 DEG C-220 DEG C, and the time is 2h-6h, obtains mixtures II；
(4) then, mixtures II and xanthan gum, cellulose acetate, poly-tryptophan carrying out mixing stirring pulping, every kind of raw material interpolation is all spaced 3-5min, obtains mixtures III；
(5) last, mixtures III and microbial biofilm are mixed and carry out micro encapsulation process, oven drying at low temperature at a temperature of being subsequently placed at 2 DEG C-8 DEG C, obtain nitrogen fertilizer plant's sewage-treating agent.
The preparation method of nitrogen fertilizer plant the most according to claim 6 sewage-treating agent, it is characterised in that in step (1), the moisture content of mixture slurry is 50%.
The preparation method of nitrogen fertilizer plant the most according to claim 6 sewage-treating agent, it is characterised in that the temperature that in step (3), mixed high temperature microwave processes is 210 DEG C, and the time is 4h.
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| CN104628138A (en) * | 2015-01-21 | 2015-05-20 | 北京林业大学 | Artificial wetland filler capable of efficiently removing nitrogen and phosphorous and preparation method thereof |
| CN105198128A (en) * | 2015-11-02 | 2015-12-30 | 宋介珍 | Water-saving type reverse-osmosis pure water production method |
| CN105502687A (en) * | 2016-01-12 | 2016-04-20 | 杨洋 | Organic industrial sewage purifying agent and using method thereof |
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2016
- 2016-05-26 CN CN201610373280.XA patent/CN105776580A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701552A (en) * | 2012-06-21 | 2012-10-03 | 南京大学 | Covering material for immobilized in-situ remediation of nitrogen in bottom sediment and preparation method thereof |
| CN104628138A (en) * | 2015-01-21 | 2015-05-20 | 北京林业大学 | Artificial wetland filler capable of efficiently removing nitrogen and phosphorous and preparation method thereof |
| CN105198128A (en) * | 2015-11-02 | 2015-12-30 | 宋介珍 | Water-saving type reverse-osmosis pure water production method |
| CN105502687A (en) * | 2016-01-12 | 2016-04-20 | 杨洋 | Organic industrial sewage purifying agent and using method thereof |
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Application publication date: 20160720 |