CN106517382A - Mixed sewage treating agent and preparation method thereof - Google Patents
Mixed sewage treating agent and preparation method thereof Download PDFInfo
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- CN106517382A CN106517382A CN201611100995.4A CN201611100995A CN106517382A CN 106517382 A CN106517382 A CN 106517382A CN 201611100995 A CN201611100995 A CN 201611100995A CN 106517382 A CN106517382 A CN 106517382A
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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
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- 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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a mixed sewage treating agent which is prepared from the following raw materials in parts by weight: 10-20 parts of pomelo peel, 5-10 parts of attapulgite, 8-15 parts of dodecyldimethylbenzyl ammonium chloride, 5-15 parts of graphene, 5-10 parts of polyferric sulfate, 0.5-1 part of butyl acetate, 5-10 parts of sodium carbonate, 5-10 parts of sodium xylene monosulfonate, 3-10 parts of sodium tripolyphosphate, 2-8 parts of tall oil fatty acid, 5-18 parts of peroxyacetic acid disinfectant, 2-5 parts of lauryl betaine, 2-5 parts of octadecyltrimethyl ammonium chloride and 10-15 parts of fly ash. The sewage treating agent can effectively lower the contents of heavy metal ions, COD (chemical oxygen demand) and SS (suspended sediment) in the sewage. The preparation method is simple, and the product cost is lower. The mixed sewage treating agent has the advantage of short sewage treatment period, and the treated sewage can reach the cyclic utilization standard. The sewage treating agent is free of toxic substances, and has favorable decolorization effects; and the treated water does not have any stink.
Description
Technical field
The present invention relates to a kind of sewage-treating agent, specifically a kind of combined sewage inorganic agent.
Background technology
Sewage-treating agent as the term suggests be exactly that a kind of additive for using is needed in sewage disposal, as polyacrylamide,
PAMC, PAMA, nonionic, amphion polyacrylamide, aluminium polychloride etc. be not
Can use as sewage-treating agent with purposes.
Polyacrylamide (Polyscrylamide) abbreviation PAM, molecular formula is：[CH2-CH(CONH2)]n, it is wire high score
Sub- polymer, between 400-2000 ten thousand, solid product outward appearance is white or yellowish powder to molecular weight, and liquid is colourless viscous
Thick colloidal, it is soluble in water, easily decompose when temperature is more than 120 DEG C.There is document report, foreign study person has found polyacrylamide
Catabolite can be used as the nutriment of bacterium vital movement, and nutriment can promote the degraded of polyacrylamide again in turn.
Therefore become using one of extensive flocculant the most, but the monomeric acrylamide of polyacrylamide is a kind of carcinogenic substance
Matter, many countries at present has reduced its application.
Existing sewage-treating agent yet suffers from following shortcoming：
1) preparation method is complicated, causes product cost higher；
2) sewage treatment period is long, and the water quality after process is poor, it is impossible to reach the standard of recycling；
3) contain noxious material in sewage-treating agent, the body of worker is damaged, while causing necessarily to environment
Harm；
4) decolorizing effect of sewage disposal is poor, and the water after processing still has stink.
The content of the invention
It is an object of the invention to provide a kind of combined sewage inorganic agent, with asking for solving to propose in above-mentioned background technology
Topic.
For achieving the above object, the present invention provides following technical scheme：
A kind of combined sewage inorganic agent, is made up of the raw material of following parts by weight：Pomelo peel 10-20 parts, attapulgite 5-
10 parts, dodecyl benzyl dimethyl ammonium chloride 8-15 parts, Graphene 5-15 parts, bodied ferric sulfate 5-10 parts, butyl acetate
0.5-1 parts, sodium carbonate 5-10 parts, sodium xylene sulfonate 5-10 parts, sodium tripolyphosphate 3-10 parts, ready denier oil acid 2-8 parts, mistake
Fluoroacetic acid thimerosal 5-18 parts, lauryl betaine 2-5 parts, OTAC 2-5 parts, flyash 10-15 parts.
As further scheme of the invention：It is made up of the raw material of following parts by weight：15 parts of pomelo peel, attapulgite 8
Part, 10 parts of dodecyl benzyl dimethyl ammonium chloride, 7 parts of Graphene, 6 parts of bodied ferric sulfate, 0.6 part of butyl acetate, sodium carbonate 7
Part, 8 parts of sodium xylene sulfonate, 5 parts of sodium tripolyphosphate, 5 parts of ready denier oil acid, 15 parts of peracetic acid disinfectant, lauryl is sweet
3 parts of dish alkali, 3 parts of OTAC, 12 parts of flyash.
A kind of preparation method of combined sewage inorganic agent, concretely comprises the following steps：
(1) each raw material is weighed, it is standby；
(2) it is put into after being well mixed flyash, attapulgite and sodium carbonate in Muffle furnace, first in 200-400 DEG C of temperature
Lower preheating 10-20min, then in 450-750 DEG C of temperature lower calcination 20-50min；
(3) step (2) gains are sequentially added into lauryl betaine, Graphene, polymerised sulphur after grinding, sieving
Sour iron, stirs at a temperature of 40-60 DEG C；
(4) pomelo peel is put into into pulverizer, and the 100-150 mesh that sieves, obtains pomelo peel powder；
(5) pomelo peel powder is put in peracetic acid disinfectant, and sequentially adds butyl acetate, sodium tripolyphosphate, appropriate
Your fatty acid oil, OTAC, sodium xylene sulfonate and dodecyl benzyl dimethyl ammonium chloride, using stirring
The machine of mixing stirs, and 10-20min is placed at a temperature of 5-15 DEG C；
(6) step (3) gains and step (5) gains are mixed, and utilizes ultrasonic oscillation 5-10min, obtained final product into
Product.
As further scheme of the invention：Flyash, attapulgite and sodium carbonate are well mixed by the step (2)
After be put in Muffle furnace, 15min is preheated at a temperature of 250 DEG C first, then in 600 DEG C of temperature lower calcination 30min.
As further scheme of the invention：The step (3) by step (2) gains after grinding, sieving, according to
Secondary addition lauryl betaine, Graphene, bodied ferric sulfate, stir at a temperature of 55 DEG C.
Compared with prior art, the invention has the beneficial effects as follows：
1) sewage-treating agent of the invention plays synergy by above-mentioned raw materials compounding, can capture various in water body
Metal ion, the Zn in heavy metal sewage2+、Cu2+、Pd2+、Cd2+, chromium, manganese there is good removal effect, effectively can reduce
COD, SS content in sewage；
2) sewage-treating agent raw material of the invention is easy to get, and preparation method is simple, and product cost is relatively low；
3) sewage-treating agent of the invention have the advantages that sewage treatment period is short, process after sewage quality it is good, and process
Sewage afterwards can reach the standard of recycling；
4) body of worker will not be damaged without noxious material in sewage-treating agent of the invention, also will not be right
Environment works the mischief；
5) water after the good decolorizing effect of sewage-treating agent of the invention, and process is destitute of smell.
Specific embodiment
The technical scheme of this patent is described in more detail with reference to specific embodiment.
Embodiment 1
A kind of combined sewage inorganic agent, is made up of the raw material of following parts by weight：10 parts of pomelo peel, 5 parts of attapulgite, ten
8 parts of dialkyl dimethyl benzyl ammonium chloride, 5 parts of Graphene, 5 parts of bodied ferric sulfate, 0.5 part of butyl acetate, 5 parts of sodium carbonate, two
5 parts of toluenesulfonic acid sodium salt, 3 parts of sodium tripolyphosphate, 2 parts of ready denier oil acid, 5 parts of peracetic acid disinfectant, lauryl betaine 2
Part, 2 parts of OTAC, 10 parts of flyash.
A kind of preparation method of combined sewage inorganic agent, concretely comprises the following steps：
(1) each raw material is weighed, it is standby；
(2) it is put into after being well mixed flyash, attapulgite and sodium carbonate in Muffle furnace, it is first pre- at a temperature of 200 DEG C
Hot 10min, then in 450 DEG C of temperature lower calcination 20min；
(3) step (2) gains are sequentially added into lauryl betaine, Graphene, polymerised sulphur after grinding, sieving
Sour iron, stirs at a temperature of 40 DEG C；
(4) pomelo peel is put into into pulverizer, and 100 mesh that sieve, obtains pomelo peel powder；
(5) pomelo peel powder is put in peracetic acid disinfectant, and sequentially adds butyl acetate, sodium tripolyphosphate, appropriate
Your fatty acid oil, OTAC, sodium xylene sulfonate and dodecyl benzyl dimethyl ammonium chloride, using stirring
The machine of mixing stirs, and at a temperature of 5 DEG C places 10min；
(6) step (3) gains and step (5) gains are mixed, and utilizes ultrasonic oscillation 5min, got product.
Embodiment 2
A kind of combined sewage inorganic agent, is made up of the raw material of following parts by weight：20 parts of pomelo peel, 10 parts of attapulgite,
15 parts of dodecyl benzyl dimethyl ammonium chloride, 15 parts of Graphene, 10 parts of bodied ferric sulfate, butyl acetate 0.5-1 parts, sodium carbonate
10 parts, 10 parts of sodium xylene sulfonate, 10 parts of sodium tripolyphosphate, 8 parts of ready denier oil acid, 18 parts of peracetic acid disinfectant, bay
5 parts of base glycine betaine, 5 parts of OTAC, 15 parts of flyash.
A kind of preparation method of combined sewage inorganic agent, concretely comprises the following steps：
(1) each raw material is weighed, it is standby；
(2) it is put into after being well mixed flyash, attapulgite and sodium carbonate in Muffle furnace, it is first pre- at a temperature of 400 DEG C
Hot 20min, then in 750 DEG C of temperature lower calcination 50min；
(3) step (2) gains are sequentially added into lauryl betaine, Graphene, polymerised sulphur after grinding, sieving
Sour iron, stirs at a temperature of 60 DEG C；
(4) pomelo peel is put into into pulverizer, and 150 mesh that sieve, obtains pomelo peel powder；
(5) pomelo peel powder is put in peracetic acid disinfectant, and sequentially adds butyl acetate, sodium tripolyphosphate, appropriate
Your fatty acid oil, OTAC, sodium xylene sulfonate and dodecyl benzyl dimethyl ammonium chloride, using stirring
The machine of mixing stirs, and at a temperature of 15 DEG C places 20min；
(6) step (3) gains and step (5) gains are mixed, and utilizes ultrasonic oscillation 10min, got product.
Embodiment 3
A kind of combined sewage inorganic agent, is made up of the raw material of following parts by weight：15 parts of pomelo peel, 8 parts of attapulgite, ten
10 parts of dialkyl dimethyl benzyl ammonium chloride, 7 parts of Graphene, 6 parts of bodied ferric sulfate, 0.6 part of butyl acetate, 7 parts of sodium carbonate, two
8 parts of toluenesulfonic acid sodium salt, 5 parts of sodium tripolyphosphate, 5 parts of ready denier oil acid, 15 parts of peracetic acid disinfectant, lauryl betaine 3
Part, 3 parts of OTAC, 12 parts of flyash.
A kind of preparation method of combined sewage inorganic agent, concretely comprises the following steps：
(1) each raw material is weighed, it is standby；
(2) it is put into after being well mixed flyash, attapulgite and sodium carbonate in Muffle furnace, it is first pre- at a temperature of 250 DEG C
Hot 15min, then in 600 DEG C of temperature lower calcination 30min；
(3) step (2) gains are sequentially added into lauryl betaine, Graphene, polymerised sulphur after grinding, sieving
Sour iron, stirs at a temperature of 55 DEG C；
(4) pomelo peel is put into into pulverizer, and 120 mesh that sieve, obtains pomelo peel powder；
(5) pomelo peel powder is put in peracetic acid disinfectant, and sequentially adds butyl acetate, sodium tripolyphosphate, appropriate
Your fatty acid oil, OTAC, sodium xylene sulfonate and dodecyl benzyl dimethyl ammonium chloride, using stirring
The machine of mixing stirs, and at a temperature of 8 DEG C places 12min；
(6) step (3) gains and step (5) gains are mixed, and utilizes ultrasonic oscillation 8min, got product.
Comparative example 1
A kind of combined sewage inorganic agent, is made up of the raw material of following parts by weight：15 parts of pomelo peel, 8 parts of attapulgite, ten
10 parts of dialkyl dimethyl benzyl ammonium chloride, 7 parts of Graphene, 6 parts of bodied ferric sulfate, 0.6 part of butyl acetate, 7 parts of sodium carbonate, two
8 parts of toluenesulfonic acid sodium salt, 5 parts of sodium tripolyphosphate, 5 parts of ready denier oil acid, 15 parts of peracetic acid disinfectant, lauryl betaine 3
Part, 12 parts of flyash.
A kind of preparation method of combined sewage inorganic agent, concretely comprises the following steps：
(1) each raw material is weighed, it is standby；
(2) it is put into after being well mixed flyash, attapulgite and sodium carbonate in Muffle furnace, it is first pre- at a temperature of 250 DEG C
Hot 15min, then in 600 DEG C of temperature lower calcination 30min；
(3) step (2) gains are sequentially added into lauryl betaine, Graphene, polymerised sulphur after grinding, sieving
Sour iron, stirs at a temperature of 55 DEG C；
(4) pomelo peel is put into into pulverizer, and 120 mesh that sieve, obtains pomelo peel powder；
(5) pomelo peel powder is put in peracetic acid disinfectant, and sequentially adds butyl acetate, sodium tripolyphosphate, appropriate
That fatty acid oil, sodium xylene sulfonate and dodecyl benzyl dimethyl ammonium chloride, are stirred using mixer, and at 8 DEG C
At a temperature of place 12min；
(6) step (3) gains and step (5) gains are mixed, and utilizes ultrasonic oscillation 8min, got product.
Comparative example 2
A kind of combined sewage inorganic agent, is made up of the raw material of following parts by weight：15 parts of pomelo peel, 8 parts of attapulgite, ten
10 parts of dialkyl dimethyl benzyl ammonium chloride, 7 parts of Graphene, 6 parts of bodied ferric sulfate, 0.6 part of butyl acetate, 7 parts of sodium carbonate, two
8 parts of toluenesulfonic acid sodium salt, 5 parts of sodium tripolyphosphate, 15 parts of peracetic acid disinfectant, 3 parts of lauryl betaine, octadecyl trimethyl
3 parts of ammonium chloride, 12 parts of flyash.
A kind of preparation method of combined sewage inorganic agent, concretely comprises the following steps：
(1) each raw material is weighed, it is standby；
(2) it is put into after being well mixed flyash, attapulgite and sodium carbonate in Muffle furnace, it is first pre- at a temperature of 250 DEG C
Hot 15min, then in 600 DEG C of temperature lower calcination 30min；
(3) step (2) gains are sequentially added into lauryl betaine, Graphene, polymerised sulphur after grinding, sieving
Sour iron, stirs at a temperature of 55 DEG C；
(4) pomelo peel is put into into pulverizer, and 120 mesh that sieve, obtains pomelo peel powder；
(5) pomelo peel powder is put in peracetic acid disinfectant, and sequentially add butyl acetate, sodium tripolyphosphate, ten
Eight alkyl trimethyl ammonium chlorides, sodium xylene sulfonate and dodecyl benzyl dimethyl ammonium chloride, are stirred using mixer,
And 12min is placed at a temperature of 8 DEG C；
(6) step (3) gains and step (5) gains are mixed, and utilizes ultrasonic oscillation 8min, got product.
OTAC is not added with comparative example 1, in comparative example 2, ready denier oil acid is not added with.
Environment protection sewage inorganic agent finished product 100mg/L prepared by Application Example 1-3 and comparative example 1-2 carries out heavy metal wastewater thereby
Process, treatment effect is as follows, unit (mg/L)：
| Project | COD | SS | Zn2+ | Cu2+ | Pd2+ | Cd2+ | Chromium | Manganese | pH |
| Water sample | 305 | 215 | 90 | 112 | 6.3 | 65 | 7 | 9 | 5.4 |
| Embodiment 1 | 25 | 6.9 | 0.61 | 0.15 | 0.02 | 0.05 | 0.059 | 0.0006 | 7.0 |
| Embodiment 2 | 22 | 5.3 | 0.58 | 0.13 | 0.02 | 0.08 | 0.042 | 0.0009 | 7.1 |
| Embodiment 3 | 17 | 5.1 | 0.45 | 0.12 | 0.01 | 0.02 | 0.033 | 0.0007 | 7.0 |
| Comparative example 1 | 102 | 68 | 2.53 | 3.54 | 0.89 | 0.89 | 0.89 | 0.058 | 6.5 |
| Comparative example 2 | 156 | 45 | 1.66 | 11.5 | 0.69 | 0.36 | 0.56 | 0.099 | 6.8 |
As can be known from the above table, the Zn in combined sewage inorganic agent heavy metal sewage of the invention2+、Cu2+、Pd2+、Cd2+, chromium,
Manganese has good removal effect.And the contrast by embodiment 1-3 with comparative example 1-2 can be seen that octadecyl trimethyl
Ammonium chloride and ready denier oil acid substantially increase the treatment effect of sewage-treating agent with the use of synergy is generated.
1) sewage-treating agent of the invention plays synergy by above-mentioned raw materials compounding, can capture various in water body
Metal ion, the Zn in heavy metal sewage2+、Cu2+、Pd2+、Cd2+, chromium, manganese there is good removal effect, effectively can reduce
COD, SS content in sewage；
2) sewage-treating agent raw material of the invention is easy to get, and preparation method is simple, and product cost is relatively low；
3) sewage-treating agent of the invention have the advantages that sewage treatment period is short, process after sewage quality it is good, and process
Sewage afterwards can reach the standard of recycling；
4) body of worker will not be damaged without noxious material in sewage-treating agent of the invention, also will not be right
Environment works the mischief；
5) water after the good decolorizing effect of sewage-treating agent of the invention, and process is destitute of smell.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment party
Formula, in the ken that one skilled in the relevant art possesses, can be with the premise of without departing from this patent objective
Make a variety of changes.
Claims (5)
1. a kind of combined sewage inorganic agent, it is characterised in that be made up of the raw material of following parts by weight：Pomelo peel 10-20 parts, it is recessed
Convex rod soil 5-10 parts, dodecyl benzyl dimethyl ammonium chloride 8-15 parts, Graphene 5-15 parts, bodied ferric sulfate 5-10 parts, vinegar
Acid butyl ester 0.5-1 parts, sodium carbonate 5-10 parts, sodium xylene sulfonate 5-10 parts, sodium tripolyphosphate 3-10 parts, ready denier oil acid 2-
8 parts, peracetic acid disinfectant 5-18 part, lauryl betaine 2-5 parts, OTAC 2-5 parts, flyash
10-15 parts.
2. combined sewage inorganic agent according to claim 1, it is characterised in that be made up of the raw material of following parts by weight：
15 parts of pomelo peel, 8 parts of attapulgite, 10 parts of dodecyl benzyl dimethyl ammonium chloride, 7 parts of Graphene, 6 parts of bodied ferric sulfate,
0.6 part of butyl acetate, 7 parts of sodium carbonate, 8 parts of sodium xylene sulfonate, 5 parts of sodium tripolyphosphate, 5 parts of ready denier oil acid, peroxide second
15 parts of cinic acid liquid, 3 parts of lauryl betaine, 3 parts of OTAC, 12 parts of flyash.
3. a kind of preparation method of the combined sewage inorganic agent as described in claim 1-2 is arbitrary, it is characterised in that concrete steps
For：
(1) each raw material is weighed, it is standby；
(2) it is put into after being well mixed flyash, attapulgite and sodium carbonate in Muffle furnace, it is first pre- at a temperature of 200-400 DEG C
Hot 10-20min, then in 450-750 DEG C of temperature lower calcination 20-50min；
(3) step (2) gains are sequentially added into lauryl betaine, Graphene, bodied ferric sulfate after grinding, sieving,
Stir at a temperature of 40-60 DEG C；
(4) pomelo peel is put into into pulverizer, and the 100-150 mesh that sieves, obtains pomelo peel powder；
(5) pomelo peel powder is put in peracetic acid disinfectant, and sequentially adds butyl acetate, sodium tripolyphosphate, tall oil
Aliphatic acid, OTAC, sodium xylene sulfonate and dodecyl benzyl dimethyl ammonium chloride, using mixer
Stir, and 10-20min is placed at a temperature of 5-15 DEG C；
(6) step (3) gains and step (5) gains are mixed, and utilizes ultrasonic oscillation 5-10min, got product.
4. the preparation method of combined sewage inorganic agent according to claim 3, it is characterised in that the step (2) is by powder
Coal ash, attapulgite and sodium carbonate are put into after being well mixed in Muffle furnace, first preheat 15min at a temperature of 250 DEG C, then 600
DEG C temperature lower calcination 30min.
5. the preparation method of combined sewage inorganic agent according to claim 3, it is characterised in that the step (3) will walk
Suddenly (2) gains sequentially add lauryl betaine, Graphene, bodied ferric sulfate after grinding, sieving, in 55 DEG C of temperature
Under stir.
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| CN201611100995.4A CN106517382A (en) | 2016-12-05 | 2016-12-05 | Mixed sewage treating agent and preparation method thereof |
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| CN108862515A (en) * | 2018-06-29 | 2018-11-23 | 郑州工程技术学院 | A kind of industrial waste water purifying agent and preparation method thereof |
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| CN107117669A (en) * | 2017-06-16 | 2017-09-01 | 长沙鼎成新材料科技有限公司 | A kind of eutrophication water treatment agent and preparation method thereof |
| CN107117669B (en) * | 2017-06-16 | 2020-08-14 | 上海永泉化工科技有限公司 | Eutrophic water treatment agent and preparation method thereof |
| CN108862515A (en) * | 2018-06-29 | 2018-11-23 | 郑州工程技术学院 | A kind of industrial waste water purifying agent and preparation method thereof |
| CN108862515B (en) * | 2018-06-29 | 2021-01-05 | 郑州工程技术学院 | Industrial wastewater purifying agent and preparation method thereof |
| CN113461177A (en) * | 2021-07-30 | 2021-10-01 | 河北弘格环保科技有限公司 | Microbial catalytic carrier for total nitrogen removal |
| CN113461177B (en) * | 2021-07-30 | 2022-05-06 | 河北弘格环保科技有限公司 | Microbial catalytic carrier for total nitrogen removal |
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