CN107827246B - Combined treating agent for domestic sewage treatment - Google Patents
Combined treating agent for domestic sewage treatment Download PDFInfo
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- CN107827246B CN107827246B CN201711085414.9A CN201711085414A CN107827246B CN 107827246 B CN107827246 B CN 107827246B CN 201711085414 A CN201711085414 A CN 201711085414A CN 107827246 B CN107827246 B CN 107827246B
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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 combined treating agent for domestic sewage treatment, which comprises a compound microbial agent, a primary chemical treatment compound preparation and a secondary chemical treatment compound preparation, wherein the compound microbial agent consists of the following components: 6-8 parts of nitrobacteria, 5-7 parts of denitrifying bacteria, 3-5 parts of bacillus and 16-20 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 40-50 parts of ferric trichloride, 22-26 parts of ferrous sulfate, 6-8 parts of polyaluminium-polyacrylamide, 3-5 parts of polyaluminium-chitin, 8-10 parts of aluminum crosslinked rectorite, 16-20 parts of sodium carbonate and 25-35 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 32-34 parts of modified diatomite, 12-14 parts of modified fly ash and 44-48 parts of modified attapulgite.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a combined treating agent for domestic sewage treatment.
Background
Domestic sewage is mainly various detergents and sewage, garbage, excrement and the like used in urban life, is mostly nontoxic inorganic salts, and contains more nitrogen, phosphorus and sulfur and more pathogenic bacteria. The sewage generated in the human life process is one of the main pollution sources of water, mainly comprises excrement and washing sewage, the daily domestic sewage amount discharged by each person in a city is 150-400L, and the amount is closely related to the living standard.
The domestic sewage contains a large amount of organic matters, such as cellulose, starch, saccharides, fat protein and the like; also frequently contain pathogenic bacteria, viruses and parasite eggs; chlorides, sulfates, phosphates, bicarbonates and Cu of inorganic salts2+、Pb2+、Ni2+、Cr3+And (3) heavy metal ions. The total characteristics are that the nitrogen, sulfur and phosphorus contents are high, and the malodorous substances are easy to generate under the action of anaerobic bacteria. The development and progress of the sewage treatment industry in China are late, and before the country is built and the reform is opened, the demand of sewage treatment in China is mainly based on the advanced use of industry and national defense. After the reform is opened, the national economy is rapidly developed, the living standard of people is obviously improved, and the requirement of sewage treatment is pulled. After the nineties of the twentieth century, the sewage treatment industry in China enters a rapid development period, and the speed increase of the sewage treatment demand is far higher than the global level.
The evaluation indexes of the sewage mainly comprise COD, BOD, SS, ammonia nitrogen content, heavy metal ion content and the like. These indexes are high, and one index does not meet the emission standard, and the other index causes that water resources can not be reused. In the prior art, various types of sewage treatment agents exist, but in order to increase the sewage treatment effect, a large amount of additives are added in the preparation process, the preparation method is complex, the process condition requirement is high, certain economic pressure is caused to a factory, the sewage treatment effect is not ideal, and most of the sewage treatment agents can only be used as reclaimed water. In addition, most of the water treatment agents in the prior art are single treatment results, and the purposes and the needs of the treated water are not distinguished.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a combined treating agent for domestic sewage treatment.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a combined treatment agent for domestic sewage treatment, which comprises a compound microbial agent, a primary chemical treatment compound preparation and a secondary chemical treatment compound preparation, wherein the compound microbial agent consists of the following components: 6-8 parts of nitrobacteria, 5-7 parts of denitrifying bacteria, 3-5 parts of bacillus and 16-20 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 40-50 parts of ferric trichloride, 22-26 parts of ferrous sulfate, 6-8 parts of polyaluminum-polyacrylamide, 3-5 parts of polyaluminum-chitin, 8-10 parts of aluminum crosslinked rectorite, 16-20 parts of sodium carbonate and 25-35 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 32-34 parts of modified diatomite, 12-14 parts of modified fly ash and 44-48 parts of modified attapulgite.
Further, wherein the complex microbial inoculant consists of the following components: 6.5-7.5 parts of nitrobacteria, 5.5-6.5 parts of denitrifying bacteria, 3.5-4.5 parts of bacillus and 17-19 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 43-47 parts of ferric trichloride, 23-25 parts of ferrous sulfate, 6.5-7.5 parts of polyaluminium-polyacrylamide, 3.5-4.5 parts of polyaluminium-chitin, 8.5-9.5 parts of aluminum crosslinked rectorite, 17-19 parts of sodium carbonate and 28-32 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 32.5-33.5 parts of modified diatomite, 12.5-13.5 parts of modified fly ash and 45-47 parts of modified attapulgite.
Further, the compound microbial agent consists of the following components: 7 parts of nitrobacteria, 6 parts of denitrifying bacteria, 4 parts of bacillus and 18 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 45 parts of ferric trichloride, 24 parts of ferrous sulfate, 7 parts of polyaluminium-polyacrylamide, 4 parts of polyaluminium-chitin, 9 parts of aluminum crosslinked rectorite, 18 parts of sodium carbonate and 30 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 33 parts of modified diatomite, 13 parts of modified fly ash and 46 parts of modified attapulgite.
The compound microbial agent utilizes four compound bacteria to treat wastewater, can effectively remove pollution of organic matters, grease, organic phosphide and the like, and treated water can be used as irrigation water.
Wherein, in the first-stage chemical treatment compound preparation:
after ferric trichloride reacts with hydroxide alkalinity in water, a plurality of hydrolysis products are generated, and the hydrolysis products have a plurality of positive charges, so that negative charges on colloidal particles can be neutralized, and the negative charges are combined with particles with negative charges and ferric hydroxide; due to the binding ability, the flocculant has flocculation ability and forms alum flocs. Ferric chloride with hydrogen sulfide (H2S), Phosphate (PO) in water4) Arsenate (AsO)4) And hydroxide alkalinity (OH) to form a precipitate. The flocculant is a high-efficiency and low-cost flocculant, and has the obvious effects of precipitating heavy metals and sulfides, decoloring, deodorizing, deoiling, sterilizing, removing phosphorus, reducing COD (chemical oxygen demand) and BOD (biochemical oxygen demand) of effluent and the like.
The organic flocculant polyacrylamide is introduced into the ferrous sulfate, the polyaluminium-polyacrylamide and the polyaluminium-chitin flocculant, so that the inorganic flocculant and the organic flocculant are compounded, the problems of small floc and difficult sedimentation of the inorganic flocculant are solved, and the aim of enhancing the sedimentation performance of the floc is fulfilled; the flocculation precipitation effect of ferric trichloride is enhanced.
The cross-linked rectorite has stable structure, no expansion, large specific surface area, ion exchange capacity, micropore diameter, high heat stability, strong surface acidity and other features, and has adsorption capacity increased by over 70% and great layer thickness, and is one kind of excellent catalyst and adsorbent. The aluminum cross-linked rectorite makes the expandable rectorite clay interlayer be propped open by the cross-linking agent column to obtain larger interlayer distance, and improves the performance of natural rectorite.
Sodium carbonate and sodium lauryl sulfate are used as auxiliary agents.
The pollutants in the water after the first-stage chemical treatment are greatly reduced, and the water can be used as reclaimed water.
Wherein, in the secondary chemical treatment compound preparation:
the modified diatomite is prepared by modifying the diatomite with a cetyltrimethylammonium bromide solution and then roasting and activating the diatomite, and the modified diatomite has an obvious improvement effect on heavy metal ions and other inorganic impurities.
The mechanism of the fly ash for treating the wastewater is as follows: the main component of the composite is aluminosilicate, active points such as silicon and aluminum exist, the composite has strong adsorption capacity, and substances contained in the fly ash and substances in the wastewater can generate flocculation precipitation, so that the purpose of removing pollutants is achieved; thirdly, the specific surface area and the pore aluminum of the fly ash are larger, so that the fly ash can filter pollutants, and the physical adsorption and flocculation precipitation of the fly ash can be enhanced after the fly ash is modified by ferric sulfate and sodium chloride, so that the wastewater treatment effect is more remarkable.
The attapulgite is activated and modified by adopting a MgCl2 solution, Mg2+ balances the action of negative charges on silicon-oxygen tetrahedrons, ions with low electrovalence and large radius and structural unit layers have weak acting force, so that cations among layers have interchangeability, and meanwhile, the attapulgite has larger internal surface area due to easy dispersion and stripping of the layers under the action of a solvent, and the attapulgite has very strong adsorbability due to the electrification property and the huge specific surface area.
The water after the secondary chemical treatment is basically purified and can be used as sprinkling water for sweeping and car washing.
The beneficial effects of the invention are as follows:
1) the sewage combined treatment agent can select and use a single treatment agent according to the use requirement, can also combine two or three types, and particularly can be matched with sewage treatment equipment to carry out graded management on the treated sewage when two or three types are used in a combined way, so that the water treatment requirement is adjusted according to the use, the efficiency is high, and the effect is good.
2) When any one of the three treating agents is used for treating, the total pollution removal capacity can reach over 90 percent, and when the compound microbial agent is matched with any one of a primary chemical treatment compound preparation and a secondary chemical treatment compound preparation, the total pollution removal capacity can reach over 97 percent; the three sewage treatment agents are used together, so that the total pollutant removal rate of the water reaching the third reservoir can reach more than 99.5 percent, and the situation that most of regenerated water can be used can be met.
3) The combined sewage treatment agent can be widely applied to sewage treatment stations in cities and villages, sewage treatment of independent mechanisms and the like.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example 1
A combined treatment agent for domestic sewage treatment, which comprises a compound microbial agent, a primary chemical treatment compound preparation and a secondary chemical treatment compound preparation, wherein the compound microbial agent consists of the following components: 6 parts of nitrobacteria, 7 parts of denitrifying bacteria, 3 parts of bacillus and 20 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 40 parts of ferric trichloride, 26 parts of ferrous sulfate, 6 parts of polyaluminium-polyacrylamide, 5 parts of polyaluminium-chitin, 8 parts of aluminum crosslinked rectorite, 20 parts of sodium carbonate and 25 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 34 parts of modified diatomite, 12 parts of modified fly ash and 48 parts of modified attapulgite.
Example 2
A combined treatment agent for domestic sewage treatment, which comprises a compound microbial agent, a primary chemical treatment compound preparation and a secondary chemical treatment compound preparation, wherein the compound microbial agent consists of the following components: 8 parts of nitrobacteria, 5 parts of denitrifying bacteria, 5 parts of bacillus and 16 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 50 parts of ferric trichloride, 22 parts of ferrous sulfate, 8 parts of polyaluminium-polyacrylamide, 3 parts of polyaluminium-chitin, 10 parts of aluminum crosslinked rectorite, 16 parts of sodium carbonate and 35 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 32 parts of modified diatomite, 14 parts of modified fly ash and 44 parts of modified attapulgite.
Example 3
A combined treatment agent for domestic sewage treatment, wherein the compound microbial agent consists of the following components: 6.5 parts of nitrobacteria, 6.5 parts of denitrifying bacteria, 3.5 parts of bacillus and 19 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 43 parts of ferric trichloride, 25 parts of ferrous sulfate, 6.5 parts of polyaluminium-polyacrylamide, 4.5 parts of polyaluminium-chitin, 8.5 parts of aluminum crosslinked rectorite, 19 parts of sodium carbonate and 28 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 33.5 parts of modified diatomite, 12.5 parts of modified fly ash and 47 parts of modified attapulgite.
Example 4
A combined treatment agent for domestic sewage treatment, wherein the compound microbial agent consists of the following components: 7.5 parts of nitrobacteria, 5.5 parts of denitrifying bacteria, 4.5 parts of bacillus and 17 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 47 parts of ferric trichloride, 23 parts of ferrous sulfate, 7.5 parts of polyaluminum-polyacrylamide, 3.5 parts of polyaluminum-chitin, 9.5 parts of aluminum crosslinked rectorite, 17 parts of sodium carbonate and 32 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 32.5 parts of modified diatomite, 13.5 parts of modified fly ash and 45 parts of modified attapulgite.
Example 5
A combined treatment agent for domestic sewage treatment, wherein the compound microbial agent consists of the following components: 7 parts of nitrobacteria, 6 parts of denitrifying bacteria, 4 parts of bacillus and 18 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 45 parts of ferric trichloride, 24 parts of ferrous sulfate, 7 parts of polyaluminium-polyacrylamide, 4 parts of polyaluminium-chitin, 9 parts of aluminum crosslinked rectorite, 18 parts of sodium carbonate and 30 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 33 parts of modified diatomite, 13 parts of modified fly ash and 46 parts of modified attapulgite.
Test data
Sampling certain municipal domestic sewage, removing insoluble substances and impurities, treating with the composite microbial treatment agent, the primary chemical treatment composite preparation and the secondary chemical treatment composite preparation of the invention, respectively, combining the composite microbial treatment agent with the primary chemical treatment composite preparation and the secondary chemical treatment composite preparation, respectively, and treating with the three combined sewage treatment agents of examples 1-5, respectively, and determining COD, BOD, SS, ammonia nitrogen, Cu before and after treatment2+、Pb2+、Ni2 +、Cr3+The total content is calculated. The test results obtained are shown in table 1:
TABLE 1 Sewage treatment test
| COD | BOD | SS | Ammonia nitrogen | Cu2+、Pb2+、Ni2+、Cr3+Total up to | |
| Sewage sampling | 3298 | 1058 | 1765 | 108 | 97 |
| Composite microbial treatment agent | 38 | 12 | 113 | 16 | 17 |
| First-stage chemical treatment composite preparation | 46 | 16 | 105 | 14 | 19 |
| Two-stage chemical treatment composite preparation | 50 | 14 | 95 | 15 | 12 |
| Complex microbial + primary chemistry | 32 | 10 | 45 | 8 | 7 |
| Complex microbial + secondary chemistry | 30 | 8 | 34 | 8 | 5 |
| Example 1 | 12 | 5 | 7 | 5 | 3 |
| Example 2 | 13 | 4 | 8 | 4 | 3 |
| Example 3 | 11 | 4 | 8 | 4 | 4 |
| Example 4 | 11 | 3 | 6 | 2 | 2 |
| Example 5 | 9 | 2 | 6 | 2 | 1 |
From the above test results, it can be seen that any one of the three treating agents of the present invention can achieve an excellent sewage treatment effect when used alone, and when the composite microbial treating agent is used in combination with the primary chemical treatment composite agent and the secondary chemical treatment composite agent, the sewage treatment effect can be greatly enhanced, indicating that a synergistic effect is achieved, whereas for the above examples 1 to 5, the synergistic effect is most significant and the sewage treatment effect is optimal when the three treating agents are used in combination.
The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (1)
1. A combined treatment agent for domestic sewage treatment is characterized by comprising a compound microbial agent, a primary chemical treatment compound preparation and a secondary chemical treatment compound preparation, wherein the compound microbial agent consists of the following components: 7 parts of nitrobacteria, 6 parts of denitrifying bacteria, 4 parts of bacillus and 18 parts of phosphorus-accumulating bacteria; the first-stage chemical treatment composite preparation consists of the following components: 45 parts of ferric trichloride, 24 parts of ferrous sulfate, 7 parts of polyaluminium-polyacrylamide, 4 parts of polyaluminium-chitin, 9 parts of aluminum crosslinked rectorite, 18 parts of sodium carbonate and 30 parts of sodium lauryl sulfate; the secondary chemical treatment compound preparation consists of the following components: 33 parts of modified diatomite, 13 parts of modified fly ash and 46 parts of modified attapulgite;
the modified diatomite is modified by cetyl trimethyl ammonium bromide solution and then is treated by
Roasting and activating the mixture to prepare the catalyst;
the modified fly ash is prepared by modifying fly ash by utilizing ferric sulfate and sodium chloride;
the modified attapulgite adopts MgCl2The solution is used for carrying out activation modification on attapulgite to obtain the attapulgite clay;
the combined treatment agent is used for treating COD, BOD, SS, ammonia nitrogen and Cu2+、Pb2+、Ni2+、Cr3+The total removal rates were 99.7%, 99.8%, 99.7%, 98.1%, and 99.0%, respectively.
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| CN110316835B (en) * | 2019-07-03 | 2022-03-29 | 合山市春旭环保科技有限责任公司 | High-efficiency composite polymeric flocculant and preparation method thereof |
| CN111099749A (en) * | 2019-12-31 | 2020-05-05 | 江苏成博环保科技有限公司 | Algae-based biological phosphorus removal water purifying agent and preparation method thereof |
| CN115650448B (en) * | 2022-02-15 | 2023-05-16 | 扬州工业职业技术学院 | Composite flocculant based on modified diatomite and application thereof |
| CN115403223B (en) * | 2022-09-19 | 2024-05-31 | 河南瀚源水务有限公司 | Water purifying agent, preparation method thereof and water purifying system |
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| JP4303918B2 (en) * | 2002-06-11 | 2009-07-29 | ケア・ルートサービス株式会社 | Treatment method after use of urine absorbent and urine absorbent |
| CN100487105C (en) * | 2006-11-29 | 2009-05-13 | 金明记 | High-effective microorganism complex agent and method of using the same for treating city sewage |
| CN103641247B (en) * | 2013-12-27 | 2016-04-06 | 沧州市利达环保工程有限公司 | One way of life sewage-treating agent and preparation method thereof |
| CN106395963A (en) * | 2016-06-20 | 2017-02-15 | 江门市江海区炜洁净水材料有限公司 | Water purifying agent used for treating domestic sewage and sewage treating method |
| CN106145381A (en) * | 2016-07-07 | 2016-11-23 | 马鞍山市顺达环保设备有限公司 | A kind of high efficiency sewage treating agent and preparation method thereof |
| CN106698538A (en) * | 2016-11-25 | 2017-05-24 | 南宁市黑晶信息技术有限公司 | Sewage treatment agent and preparation method thereof |
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