CN110921759A - Sewage impurity removal material and preparation method thereof - Google Patents
Sewage impurity removal material and preparation method thereof Download PDFInfo
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- CN110921759A CN110921759A CN201911286188.XA CN201911286188A CN110921759A CN 110921759 A CN110921759 A CN 110921759A CN 201911286188 A CN201911286188 A CN 201911286188A CN 110921759 A CN110921759 A CN 110921759A
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- sewage impurity
- sewage
- potassium permanganate
- impurity removal
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- 239000010865 sewage Substances 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 title claims abstract description 37
- 239000012535 impurity Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 48
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 24
- 239000010902 straw Substances 0.000 claims abstract description 22
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 21
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000010457 zeolite Substances 0.000 claims abstract description 21
- 238000001179 sorption measurement Methods 0.000 claims abstract description 20
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 19
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920001285 xanthan gum Polymers 0.000 claims abstract description 19
- 229940082509 xanthan gum Drugs 0.000 claims abstract description 19
- 235000010493 xanthan gum Nutrition 0.000 claims abstract description 19
- 239000000230 xanthan gum Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- 240000008042 Zea mays Species 0.000 claims abstract description 17
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 17
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 17
- 229940037003 alum Drugs 0.000 claims abstract description 17
- 235000005822 corn Nutrition 0.000 claims abstract description 17
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 16
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000002994 raw material Substances 0.000 claims description 30
- 239000012153 distilled water Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 4
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 239000006227 byproduct Substances 0.000 description 3
- 208000034699 Vitreous floaters Diseases 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- AOJJSUZBOXZQNB-VTZDEGQISA-N 4'-epidoxorubicin Chemical group O([C@H]1C[C@@](O)(CC=2C(O)=C3C(=O)C=4C=CC=C(C=4C(=O)C3=C(O)C=21)OC)C(=O)CO)[C@H]1C[C@H](N)[C@@H](O)[C@H](C)O1 AOJJSUZBOXZQNB-VTZDEGQISA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 241000425347 Phyla <beetle> Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a sewage impurity removal material which comprises, by weight, 20-30 parts of kaolin, 10-20 parts of carbon powder, 10-15 parts of sodium hydroxide, 10-15 parts of alum, 5-6 parts of zeolite, 10-15 parts of polyacrylic acid, 5-10 parts of macroporous adsorption resin, 20-30 parts of corn straw, 5-10 parts of potassium permanganate and 2-5 parts of xanthan gum; adopt cheap and the better material of adsorption effect such as straw, kaolin and carbon dust, modify through strong oxide matter hydrogen peroxide solution in the preparation process, promote adsorption efficiency, utilize xanthan gum and resin to bond the material, do benefit to the preservation, in the material of this application all have the efficient to absorb to pollutants such as floater, impurity, heavy metal in the sewage in addition, go on thoroughly, clean to the purification of sewage.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and relates to a sewage impurity removal material.
The invention also relates to a preparation method of the sewage impurity removal material.
Background
Waste water (water) is a general term for water and runoff rainwater drained in the process of activities of residents and comprises domestic sewage, industrial waste water, primary rainwater and other useless water such as a drainage pipe canal; at present, industrial and domestic water is polluted seriously, and the pollution to the environment is more severe due to random discharge, particularly in summer, the rising of the temperature leads to the accelerated evaporation of sewage, and toxic and peculiar-smell gas seriously pollutes the air;
the water in the zeolite can escape but this does not destroy the crystal structure inside the zeolite. It can therefore also reabsorb water or other liquids. Therefore, the characteristic of zeolite is utilized, and the zeolite can be used for separating and adsorbing certain pollutants; potassium permanganate is a strong oxidant and can kill bacteria;
how to integrate various kinds of decontaminable materials is important to find a decontaminable material which is easy to store and produce and is easy to obtain.
Disclosure of Invention
The invention aims to provide a sewage impurity removal material, which solves the problems of high cost and incomplete purification in the existing sewage treatment.
The invention also aims to provide a preparation method of the sewage impurity removal material.
The first technical scheme adopted by the invention is that the sewage impurity removing material comprises, by weight, 20-30 parts of kaolin, 10-20 parts of carbon powder, 10-15 parts of sodium hydroxide, 10-15 parts of alum, 5-6 parts of zeolite, 10-15 parts of polyacrylic acid, 5-10 parts of macroporous adsorption resin, 20-30 parts of corn straw, 5-10 parts of potassium permanganate and 2-5 parts of xanthan gum.
The second technical scheme adopted by the invention is that the preparation method of the sewage impurity removal material adopts the sewage impurity removal material and is implemented according to the following steps:
step 1, weighing 20-30 parts of kaolin, 10-20 parts of carbon powder, 10-15 parts of sodium hydroxide, 10-15 parts of alum, 5-6 parts of zeolite, 10-15 parts of polyacrylic acid, 5-10 parts of macroporous adsorption resin, 20-30 parts of corn straw, 5-10 parts of potassium permanganate and 2-5 parts of xanthan gum according to weight percentage;
step 2, primarily crushing and mixing the kaolin, the carbon powder, the sodium hydroxide, the alum, the zeolite and the corn straws weighed in the step 1;
step 3, adding hydrogen peroxide into the raw materials which are primarily crushed and mixed in the step 2 for ultrasonic dispersion;
and 4, dissolving potassium permanganate in distilled water, spraying the solution to the raw material treated in the step 3, dissolving the raw material in distilled water, heating, and sequentially adding polyacrylic acid, macroporous adsorption resin and xanthan gum during heating to obtain the sewage impurity removal material.
The second technical solution of the present invention is also characterized in that:
in the step 2, the crushed particle size is 2-3 mm;
in the step 3, the ultrasonic dispersion time is 20-30 min, and the ratio of hydrogen peroxide to raw materials is 1: 2;
in the step 4, the ratio of potassium permanganate to distilled water is 1:5, and the ratio of raw materials to distilled water is 1: 4;
wherein in the step 4, the heating temperature is 100-150 ℃, and the heating time is 20-30 min.
The invention has the beneficial effects that:
according to the sewage impurity removal material, cheap materials with good adsorption effect such as straw, kaolin, carbon powder and the like are adopted, strong oxide hydrogen peroxide is used for modification in the preparation process, the adsorption capacity is improved, the materials are bonded by xanthan gum and resin, the storage is facilitated, pollutants such as floaters, impurities, heavy metals and the like in sewage are efficiently absorbed in the material, and the purification of the sewage is thorough and clean.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention provides a sewage impurity removal material which comprises, by weight, 20-30 parts of kaolin, 10-20 parts of carbon powder, 10-15 parts of sodium hydroxide, 10-15 parts of alum, 5-6 parts of zeolite, 10-15 parts of polyacrylic acid, 5-10 parts of macroporous adsorption resin, 20-30 parts of corn straw, 5-10 parts of potassium permanganate and 2-5 parts of xanthan gum.
The invention also provides a preparation method of the sewage impurity removal material, which is implemented by adopting the sewage impurity removal material according to the following steps:
step 1, weighing 20-30 parts of kaolin, 10-20 parts of carbon powder, 10-15 parts of sodium hydroxide, 10-15 parts of alum, 5-6 parts of zeolite, 10-15 parts of polyacrylic acid, 5-10 parts of macroporous adsorption resin, 20-30 parts of corn straw, 5-10 parts of potassium permanganate and 2-5 parts of xanthan gum according to weight percentage;
step 2, primarily crushing and mixing the kaolin, the carbon powder, the sodium hydroxide, the alum, the zeolite and the corn straws weighed in the step 1, wherein the crushed particle size is 2-3 mm;
and 3, adding hydrogen peroxide into the raw materials which are preliminarily crushed and mixed in the step 2 for ultrasonic dispersion, wherein the ultrasonic dispersion time is 20-30 min, and the ratio of the hydrogen peroxide to the raw materials is 1: 2;
and 4, dissolving potassium permanganate in distilled water, spraying the solution to the raw material treated in the step 3, dissolving the raw material in the distilled water, and heating, wherein the ratio of the potassium permanganate to the distilled water is 1:5, and the ratio of the raw material to the distilled water is 1: and 4, sequentially adding polyacrylic acid, macroporous adsorption resin and xanthan gum during heating to obtain the sewage impurity removal material, wherein the heating temperature is 100-150 ℃, and the heating time is 20-30 min.
Example 1
Step 1, weighing 20 parts of kaolin, 10 parts of carbon powder, 10 parts of sodium hydroxide, 10 parts of alum, 5 parts of zeolite, 10 parts of polyacrylic acid, 5 parts of macroporous adsorption resin, 20 parts of corn straw, 5 parts of potassium permanganate and 2 parts of xanthan gum according to weight percentage;
step 2, primarily crushing and mixing the kaolin, the carbon powder, the sodium hydroxide, the alum, the zeolite and the corn straws weighed in the step 1, wherein the crushed particle size is 2 mm;
and 3, adding hydrogen peroxide into the raw materials which are primarily crushed and mixed in the step 2 for ultrasonic dispersion, wherein the ultrasonic dispersion time is 20min, and the ratio of the hydrogen peroxide to the raw materials is 1: 2;
and 4, dissolving potassium permanganate in distilled water, spraying the solution to the raw material treated in the step 3, dissolving the raw material in the distilled water, and heating, wherein the ratio of the potassium permanganate to the distilled water is 1:5, and the ratio of the raw material to the distilled water is 1: and 4, sequentially adding polyacrylic acid, macroporous adsorption resin and xanthan gum during heating to obtain the sewage impurity removal material, wherein the heating temperature is 100 ℃, and the heating time is 20 min.
Example 2
Step 1, weighing 30 parts of kaolin, 20 parts of carbon powder, 15 parts of sodium hydroxide, 15 parts of alum, 6 parts of zeolite, 15 parts of polyacrylic acid, 10 parts of macroporous adsorption resin, 30 parts of corn straw, 10 parts of potassium permanganate and 5 parts of xanthan gum according to weight percentage;
step 2, primarily crushing and mixing the kaolin, the carbon powder, the sodium hydroxide, the alum, the zeolite and the corn straws weighed in the step 1, wherein the crushed particle size is 3 mm;
and 3, adding hydrogen peroxide into the raw materials which are preliminarily crushed and mixed in the step 2 for ultrasonic dispersion, wherein the ultrasonic dispersion time is 30min, and the ratio of the hydrogen peroxide to the raw materials is 1: 2;
and 4, dissolving potassium permanganate in distilled water, spraying the solution to the raw material treated in the step 3, dissolving the raw material in the distilled water, and heating, wherein the ratio of the potassium permanganate to the distilled water is 1:5, and the ratio of the raw material to the distilled water is 1: and 4, sequentially adding polyacrylic acid, macroporous adsorption resin and xanthan gum during heating to obtain the sewage impurity removal material, wherein the heating temperature is 140 ℃, and the heating time is 25 min.
Example 3
Step 1, weighing 25 parts of kaolin, 15 parts of carbon powder, 12 parts of sodium hydroxide, 14 parts of alum, 5 parts of zeolite, 12 parts of polyacrylic acid, 8 parts of macroporous adsorption resin, 25 parts of corn straw, 6 parts of potassium permanganate and 3 parts of xanthan gum according to weight percentage;
step 2, primarily crushing and mixing the kaolin, the carbon powder, the sodium hydroxide, the alum, the zeolite and the corn straws weighed in the step 1, wherein the crushed particle size is 2 mm;
and 3, adding hydrogen peroxide into the raw materials which are preliminarily crushed and mixed in the step 2 for ultrasonic dispersion, wherein the ultrasonic dispersion time is 30min, and the ratio of the hydrogen peroxide to the raw materials is 1: 2;
and 4, dissolving potassium permanganate in distilled water, spraying the solution to the raw material treated in the step 3, dissolving the raw material in the distilled water, and heating, wherein the ratio of the potassium permanganate to the distilled water is 1:5, and the ratio of the raw material to the distilled water is 1: and 4, sequentially adding polyacrylic acid, macroporous adsorption resin and xanthan gum during heating to obtain the sewage impurity removal material, wherein the heating temperature is 120 ℃, and the heating time is 25 min.
The invention adopts potassium permanganate to treat sewage, the disinfected water does not generate odor and toxic disinfection byproducts, and can kill a plurality of phyla algae and microorganisms, even partial primitive organisms and worms;
the straws are common agricultural byproducts, the natural fiber structure of the straws can provide a high-efficiency filtering and adsorbing effect, and a way is provided for the treatment of the straws;
the carbon powder, the alum, the zeolite and the corn straw are easy to obtain, and the decontamination effect is obvious;
kaolin and xanthan gum are adopted to ensure that the material has better adhesiveness and no by-product; do benefit to the saving, it all has the efficient to absorb to pollutants such as floater, impurity, heavy metal in the sewage in the material of this application moreover, thoroughly, clean going on the purification of sewage.
Claims (6)
1. The sewage impurity removal material is characterized by comprising, by weight, 20-30 parts of kaolin, 10-20 parts of carbon powder, 10-15 parts of sodium hydroxide, 10-15 parts of alum, 5-6 parts of zeolite, 10-15 parts of polyacrylic acid, 5-10 parts of macroporous adsorption resin, 20-30 parts of corn straw, 5-10 parts of potassium permanganate and 2-5 parts of xanthan gum.
2. A preparation method of a sewage impurity removal material adopts the sewage impurity removal material of claim 1, and is characterized by comprising the following steps:
step 1, weighing 20-30 parts of kaolin, 10-20 parts of carbon powder, 10-15 parts of sodium hydroxide, 10-15 parts of alum, 5-6 parts of zeolite, 10-15 parts of polyacrylic acid, 5-10 parts of macroporous adsorption resin, 20-30 parts of corn straw, 5-10 parts of potassium permanganate and 2-5 parts of xanthan gum according to weight percentage;
step 2, primarily crushing and mixing the kaolin, the carbon powder, the sodium hydroxide, the alum, the zeolite and the corn straws weighed in the step 1;
step 3, adding hydrogen peroxide into the raw materials which are primarily crushed and mixed in the step 2 for ultrasonic dispersion;
and 4, dissolving potassium permanganate in distilled water, spraying the solution to the raw material treated in the step 3, dissolving the raw material in distilled water, heating, and sequentially adding polyacrylic acid, macroporous adsorption resin and xanthan gum during heating to obtain the sewage impurity removal material.
3. The method for preparing the sewage impurity removing material according to claim 2, wherein in the step 2, the crushed particle size is 2-3 mm.
4. The preparation method of the sewage impurity removing material according to claim 2, wherein in the step 3, the ultrasonic dispersion time is 20-30 min, and the ratio of hydrogen peroxide to raw materials is 1: 2.
5. the method for preparing a sewage impurity removing material according to claim 2, wherein in the step 4, the ratio of potassium permanganate to distilled water is 1:5, and the ratio of raw materials to distilled water is 1: 4.
6. the method for preparing the sewage impurity removing material according to claim 2, wherein in the step 4, the heating temperature is 100-150 ℃ and the heating time is 20-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286188.XA CN110921759A (en) | 2019-12-13 | 2019-12-13 | Sewage impurity removal material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286188.XA CN110921759A (en) | 2019-12-13 | 2019-12-13 | Sewage impurity removal material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110921759A true CN110921759A (en) | 2020-03-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911286188.XA Pending CN110921759A (en) | 2019-12-13 | 2019-12-13 | Sewage impurity removal material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110921759A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976486A (en) * | 2012-12-05 | 2013-03-20 | 宁波天安生物材料有限公司 | Material for water treatment |
| CN104071902A (en) * | 2014-07-10 | 2014-10-01 | 杨晴雅 | Method for treating household wastewater |
| CN106517381A (en) * | 2016-12-05 | 2017-03-22 | 郑州丽福爱生物技术有限公司 | Waste water treating agent used for treating industrial waste water as well as preparing method and application thereof |
| CN107673418A (en) * | 2017-10-12 | 2018-02-09 | 桂林浩新科技服务有限公司 | A kind of sanitary sewage disposal material and preparation method thereof |
-
2019
- 2019-12-13 CN CN201911286188.XA patent/CN110921759A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976486A (en) * | 2012-12-05 | 2013-03-20 | 宁波天安生物材料有限公司 | Material for water treatment |
| CN104071902A (en) * | 2014-07-10 | 2014-10-01 | 杨晴雅 | Method for treating household wastewater |
| CN106517381A (en) * | 2016-12-05 | 2017-03-22 | 郑州丽福爱生物技术有限公司 | Waste water treating agent used for treating industrial waste water as well as preparing method and application thereof |
| CN107673418A (en) * | 2017-10-12 | 2018-02-09 | 桂林浩新科技服务有限公司 | A kind of sanitary sewage disposal material and preparation method thereof |
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Application publication date: 20200327 |
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