CN107758823B - Domestic sewage treatment agent and preparation method thereof - Google Patents
Domestic sewage treatment agent and preparation method thereof Download PDFInfo
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- CN107758823B CN107758823B CN201711233525.XA CN201711233525A CN107758823B CN 107758823 B CN107758823 B CN 107758823B CN 201711233525 A CN201711233525 A CN 201711233525A CN 107758823 B CN107758823 B CN 107758823B
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- 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
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- Environmental & Geological Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
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Abstract
The invention discloses a domestic sewage treatment agent and a preparation method thereof. The domestic sewage treatment agent comprises the following raw materials in parts by weight: 12-15 parts of polyferric trichloride, 20-30 parts of sepiolite, 5-10 parts of modified silkworm excrement-based hierarchical porous carbon material, 10-15 parts of sodium hydroxide, 12-15 parts of polyacrylamide, 10-15 parts of sodium carbonate and 1-5 parts of bio-based porous composite material. The treatment agent of the invention is added with two novel biochar materials, the adsorption and purification capacity of the sewage treatment agent is enhanced, and the domestic sewage of residents can be effectively treated under the coordination of other raw materials, so that the treatment effect is good, the cost is relatively low, the performance is stable, and the treated pollution reaches the sewage discharge standard specified by the state.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment agent and a preparation method thereof.
Background
Along with the improvement of living standard and the increase of water consumption, the generated domestic sewage quantity is more and more. How to effectively treat domestic sewage and reduce pollution to the environment is a research topic. At present, the method for treating domestic sewage comprises various methods such as physical, chemical, biological, comprehensive and the like. The physical method is to recover insoluble suspended pollutant in sewage through physical separation, and to filter, centrifuge, etc. The physical method is simple, but only basic treatment can be carried out, the treatment effect is poor, pollutants dissolved in water cannot be treated, and the efficiency is low. The biological treatment method is to convert organic pollutants in a dissolved state, a colloid state and a suspension state in sewage into stable harmless substances through the metabolism of microorganisms. However, the method has large equipment investment and high operation cost, and is difficult to remove heavy metal ions. Therefore, the chemical method is mostly adopted to treat the sewage, and the chemical method is to put in a chemical reagent to perform neutralization, flocculation, oxidation reduction and other reactions with the pollutants in the sewage so as to achieve the purpose of removing the pollutants. The sewage is treated by the method more thoroughly, the treated sewage can reach the discharge standard, the requirement on the occupied area is small, the effect is more obvious, and the method is generally adopted. The selection and the preparation of the sewage treatment agent in the chemical method are the key of the whole method.
Disclosure of Invention
The invention aims to provide a domestic sewage treatment agent and a preparation method thereof. The treating agent can effectively treat domestic sewage of residents, has good treatment effect, relatively low cost and relatively stable performance, and the treated pollution reaches the sewage discharge standard specified by the state.
The purpose of the invention is realized by the following technical scheme:
the domestic sewage treatment agent comprises the following raw materials in parts by weight: 12-15 parts of polyferric trichloride, 20-30 parts of sepiolite, 20-30 parts of bentonite, 5-10 parts of modified silkworm excrement-based hierarchical porous carbon material, 10-15 parts of sodium hydroxide, 12-15 parts of polyacrylamide, 10-15 parts of sodium carbonate and 1-5 parts of bio-based porous composite material.
Preferably, the domestic sewage treatment agent comprises the following raw materials in parts by weight: 12-15 parts of polyferric trichloride, 25-30 parts of sepiolite, 25-30 parts of bentonite, 10-12 parts of sodium hydroxide, 12-15 parts of polyacrylamide, 10-12 parts of sodium carbonate, 3-5 parts of a bio-based porous composite material and 5-8 parts of a modified silkworm excrement-based hierarchical porous carbon material.
Preferably, the domestic sewage treatment agent comprises the following raw materials in parts by weight: 15 parts of polyferric trichloride, 25 parts of sepiolite, 30 parts of bentonite, 10 parts of sodium hydroxide, 15 parts of polyacrylamide, 10 parts of sodium carbonate, 5 parts of bio-based porous composite material and 5 parts of modified silkworm excrement-based hierarchical porous carbon material.
Preferably, the preparation method of the bio-based porous composite material comprises the following steps of mixing sodium carboxymethylcellulose gel and a trimesic acid solution according to a mass ratio of 1-5: 1, stirring and mixing uniformly, then pouring into a mold inserted with a copper sheet with an inclination angle of 15 degrees, and then putting into a freeze dryer for drying to obtain the biomass porous composite material. Wherein the sodium carboxymethyl cellulose gel is prepared by mixing sodium carboxymethyl cellulose with water under stirring; the trimesic acid solution is obtained by dissolving trimesic acid in absolute ethyl alcohol and ultrasonically dissolving.
Preferably, the modified silkworm excrement-based hierarchical porous carbon material is prepared from raw silkworm excrement and ZnCl2The solution is prepared from the following raw materials in a ratio of 1: 80 swelling, freeze drying, and adding silkworm excrement in N2Performing activation reaming reaction for 2 hours at 600 ℃, and then cleaning, centrifuging and drying to obtain the silkworm excrement-based porous carbon material; then mixing the copper sulfate solution with the copper sulfate solution according to the ratio of material to liquid of 1: 80 oscillating, mixing, centrifugally drying, putting into a plasma reactor, and introducing O2Inputting a voltage of 20V, modifying for 10min, carrying out surface modification, cleaning after modification, and drying to obtain the modified silkworm excrement-based hierarchical porous carbon material.
The preparation method of the domestic sewage treatment agent comprises the steps of taking raw materials according to the weight parts, mixing and crushing the sepiolite, the sodium carbonate and the bio-based porous composite material, sieving the mixture by 50-100 meshes, putting the crushed mixture into a container, adding the polyacrylamide and the polyferric trichloride, continuously stirring and uniformly mixing the mixture for 10-20 minutes, adding the sodium hydroxide, stirring and mixing the mixture for 10-20 minutes, controlling the mixing temperature to be lower than 55 ℃, adding the modified silkworm excrement-based multi-stage porous carbon material, and stirring and uniformly mixing the mixture to obtain the domestic sewage treatment agent.
According to the application method of the domestic sewage treatment agent, 0.1-0.2 kg of the domestic sewage treatment agent is added into every 1 cubic meter of domestic sewage, and the sewage stirrer is started for 10-30 minutes, so that the domestic sewage treatment agent is fully contacted with the sewage and then is stopped stirring, and the domestic sewage treatment agent is reacted with the sewage.
The polyferric trichloride has the advantages of good flocculation effect, high hydrolysis speed, weak hydration, flocculation capability, easy formation of alum floc, compactness, high settling speed and small influence of water temperature change, and can meet the requirement of generating shearing force in the flowing process. The polyferric trichloride can react with hydrogen sulfide, phosphate and alkali hydroxide in water to generate precipitate, the sulfide in sewage is precipitated, alum blossom is formed, and the flocculant is an efficient and cheap flocculant capable of adsorbing substances which are difficult to degrade in water. Has the obvious effects of precipitation, deodorization, oil removal, sterilization, phosphorus removal, COD and BOD reduction of effluent and the like.
The polyacrylamide is a flocculating agent, can adsorb suspended particles in water, gradually forms large floccules, accelerates the speed of precipitation, has a water-soluble polymer, and can quickly generate flocculation with substances in the water.
The modified silkworm excrement-based hierarchical porous carbon material not only has a natural three-dimensional fold structure and contains a large amount of carboxyl, hydroxyl, amino groups and the like, but also forms a high-specific-surface microporous structure, the microporous structures can adsorb heavy metals in domestic sewage, the adsorption capacity is obviously increased due to the increase of the specific surface area, and simultaneously the microporous structures contain the carboxyl, the hydroxyl and the amino groups and can react with medium-polarity groups of the sewage to accelerate the treatment of the sewage.
The biological-based porous composite material forms a hierarchical pore structure communicated with a three-dimensional network, has rich nano-pore surfaces, is very favorable for improving the adsorption force on adsorption molecules, and has obvious adsorption force on heavy metals in sewage because CMC has a large number of hydroxyl functional groups.
The sodium carbonate in the invention can decompose common organic substances such as protein, fat, starch and the like in domestic sewage, so that lighter substances are suspended on the water surface, heavier substances are deposited at the water bottom, and microorganisms in fire extinguishment can be killed.
The sepiolite powder is a hydrated magnesium silicate clay mineral which is pure natural, non-toxic, tasteless, asbestos-free and free of radioactive elements, has the largest specific surface area (up to 900m2/g) and a unique content pore channel structure in non-metallic minerals, and is the clay mineral with the strongest adsorption capacity.
Bentonite (bentonite) is a clay mineral containing montmorillonite (montmorillonite) as a main component. The chemical composition of the aluminum silicate is aluminum silicate with the chemical formula of Al2O3 & 4SiO2 & 3H 2O. The unit cell of the microstructure is composed of two Si2O tetrahedral wafer and an Al sandwiched therebetween2O or Al2OH octahedron wafer, and bentonite has strong adsorbability and ion exchange property.
Compared with the prior art, the invention has the following beneficial effects:
(1) the domestic sewage treatment agent disclosed by the invention is added with two biomass carbon materials, a modified silkworm excrement-based hierarchical porous carbon material and a biological-based porous composite material, so that the adsorption of heavy metal elements in sewage and other polar electronic pollutants can be obviously improved. Meanwhile, the traditional flocculating agent and the traditional adsorbent are matched, and the treatment efficiency of the domestic sewage is improved through reasonable compounding of the raw materials, so that the COD and the BOD of the treated domestic sewage are obviously reduced, and the domestic sewage meets the discharge standard required by China.
(2) The domestic sewage treatment agent disclosed by the invention can also effectively play the technical effects of inhibiting corrosion and scale and inhibiting the growth of algae, effectively reduces the scaling and corrosion of a system, reduces the production cost, purifies sewage and simultaneously reduces the cleaning process of a sewage treatment tank.
(3) The invention has simple treatment process, less dosage, good treatment effect, stable performance and good effluent quality; effectively reduces the cost of water treatment.
Detailed Description
The invention is further described with reference to the following examples, but the scope of the invention as claimed is not limited to the examples.
The preparation method comprises the following steps of (1) preparing a modified silkworm excrement-based hierarchical porous carbon material in advance: the modified silkworm excrement-based hierarchical porous carbon material is prepared by adding 10kg of silkworm excrement into 400L of ZnCl with the mass concentration of 0.50kg/L2Swelling the solution, freeze-drying, and adding the lyophilized faeces Bombycis in N2Performing activation reaming reaction for 2 hours at 600 ℃, and then cleaning, centrifuging and drying to obtain the silkworm excrement-based porous carbon material; then the mixture is mixed with 0.1mol/L copper sulfate solution according to the material-liquid ratio of 1: 40 oscillating, mixing, centrifugally drying, putting into a plasma reactor, and introducing O2Inputting a voltage of 20V, modifying for 10min, carrying out surface modification, cleaning after modification, and drying to obtain the modified silkworm excrement-based hierarchical porous carbon material.
Pre-preparation of bio-based porous composite: 5kg of sodium carboxymethylcellulose is mixed with 50L of water under stirring to obtain sodium carboxymethylcellulose gel. 5kg of trimesic acid is dissolved in 30L of absolute ethyl alcohol and ultrasonically dissolved, and a trimesic acid solution can be obtained. Then mixing the sodium carboxymethylcellulose gel with the trimesic acid solution according to a mass ratio of 1-5: 1, stirring and mixing uniformly, then pouring into a mold inserted with a copper sheet with an inclination angle of 15 degrees, and then putting into a freeze dryer at-50 ℃ for drying to obtain the biomass porous composite material.
Example 1
A domestic sewage treatment agent comprises the following raw materials: 15 parts of polyferric trichloride, 25 parts of sepiolite, 30 parts of bentonite, 10 parts of sodium hydroxide, 15 parts of polyacrylamide, 10 parts of sodium carbonate, 5 parts of bio-based porous composite material and 5 parts of modified silkworm excrement-based hierarchical porous carbon material. Weighing raw materials according to a raw material ratio, mixing sepiolite, sodium carbonate and a bio-based porous composite material, crushing, sieving by a 100-mesh sieve, putting into a container, adding polyacrylamide and polyferric trichloride, continuously stirring and uniformly mixing for 20 minutes, adding sodium hydroxide, stirring and mixing for 15 minutes, controlling the mixing temperature to be less than 55 ℃, adding a modified silkworm excrement-based multi-stage porous carbon material, and stirring and mixing uniformly to obtain the domestic sewage treatment agent.
Example 2
A domestic sewage treatment agent comprises the following raw materials: 12 parts of polyferric trichloride, 30 parts of sepiolite, 25 parts of bentonite, 12 parts of sodium hydroxide, 12 parts of polyacrylamide, 12 parts of sodium carbonate, 3 parts of a bio-based porous composite material and 8 parts of a modified silkworm excrement-based hierarchical porous carbon material. Weighing raw materials according to a raw material ratio, mixing sepiolite, sodium carbonate and a bio-based porous composite material, crushing, sieving by 50 meshes, putting into a container, adding polyacrylamide and polyferric trichloride, continuously stirring and uniformly mixing for 15 minutes, adding sodium hydroxide, stirring and mixing for 20 minutes, controlling the mixing temperature to be less than 55 ℃, adding a modified silkworm excrement-based multi-stage porous carbon material, and stirring and mixing uniformly to obtain the domestic sewage treatment agent.
Example 3
A domestic sewage treatment agent comprises the following raw materials: 13 parts of polyferric trichloride, 28 parts of sepiolite, 28 parts of bentonite, 10 parts of sodium hydroxide, 15 parts of polyacrylamide, 10 parts of sodium carbonate, 5 parts of a bio-based porous composite material and 6 parts of a modified silkworm excrement-based hierarchical porous carbon material. Weighing raw materials according to a raw material ratio, mixing sepiolite, sodium carbonate and a bio-based porous composite material, crushing, sieving by a 100-mesh sieve, putting into a container, adding polyacrylamide and polyferric trichloride, continuously stirring and uniformly mixing for 10 minutes, adding sodium hydroxide, stirring and mixing for 20 minutes, controlling the mixing temperature to be less than 55 ℃, adding a modified silkworm excrement-based multi-stage porous carbon material, and stirring and mixing uniformly to obtain the domestic sewage treatment agent.
Example 4
A domestic sewage treatment agent comprises the following raw materials: 15 parts of polyferric trichloride, 25 parts of sepiolite, 25 parts of bentonite, 15 parts of sodium hydroxide, 12 parts of polyacrylamide, 15 parts of sodium carbonate, 1 part of bio-based porous composite material and 10 parts of modified silkworm excrement-based hierarchical porous carbon material. Weighing raw materials according to the raw material proportion, mixing sepiolite, sodium carbonate and a bio-based porous composite material, crushing, sieving by a 100-mesh sieve, putting into a container, adding polyacrylamide and polyferric trichloride, continuously stirring and uniformly mixing for 10 minutes, adding sodium hydroxide, stirring and mixing for 20 minutes, controlling the mixing temperature to be less than 55 ℃, finally adding a modified silkworm excrement-based hierarchical porous carbon material, and stirring and mixing uniformly to obtain the domestic sewage treatment agent.
Example 5
A domestic sewage treatment agent comprises the following raw materials: 12 parts of polyferric trichloride, 20 parts of sepiolite, 20 parts of bentonite, 10 parts of sodium hydroxide, 15 parts of polyacrylamide, 12 parts of sodium carbonate, 5 parts of a bio-based porous composite material and 5 parts of a modified silkworm excrement-based hierarchical porous carbon material. Weighing raw materials according to a raw material ratio, mixing sepiolite, sodium carbonate and a bio-based porous composite material, crushing, sieving by a 100-mesh sieve, putting into a container, adding polyacrylamide and polyferric trichloride, continuously stirring and uniformly mixing for 15 minutes, adding sodium hydroxide, stirring and mixing for 15 minutes, controlling the mixing temperature to be less than 55 ℃, adding a modified silkworm excrement-based multi-stage porous carbon material, and stirring and mixing uniformly to obtain the domestic sewage treatment agent.
The domestic sewage treatment agent prepared in the embodiments 1 to 5 is added with 0.1 to 0.2kg of the domestic sewage treatment agent per 1 cubic meter of domestic sewage, and the sewage stirrer is started for 10 to 30 minutes, so that the domestic sewage treatment agent is fully contacted with the sewage and then the stirring is stopped, and the domestic sewage treatment agent reacts with the sewage. The sewage treated by the domestic sewage treating agent meets GB18918-2002 discharge Standard of pollutants for municipal wastewater treatment plants.
Claims (5)
1. The domestic sewage treatment agent is characterized by comprising the following raw materials in parts by weight: 12-15 parts of polyferric trichloride, 20-30 parts of sepiolite, 20-30 parts of bentonite, 10-15 parts of sodium hydroxide, 12-15 parts of polyacrylamide, 10-15 parts of sodium carbonate, 1-5 parts of bio-based porous composite material and 5-10 parts of modified silkworm excrement-based hierarchical porous carbon material;
the preparation method of the bio-based porous composite material comprises the following steps of mixing sodium carboxymethyl cellulose gel and a trimesic acid solution according to a mass ratio of 1-5: 1, stirring and mixing uniformly, then pouring into a mold inserted with a copper sheet with an inclination angle of 15 degrees, and then putting into a freeze dryer for drying to obtain the bio-based porous composite material; the sodium carboxymethyl cellulose gel is prepared by mixing sodium carboxymethyl cellulose and water under stirring; the trimesic acid solution is prepared by dissolving trimesic acid in absolute ethyl alcohol and ultrasonically dissolving;
the modified silkworm excrement-based hierarchical porous carbon material is prepared by mixing raw silkworm excrement and ZnCl2The solution is prepared from the following raw materials in a ratio of 1: 80 swelling, freeze drying, and adding silkworm excrement in N2Carrying out activation reaming reaction for 2 hours at 600 ℃, and then cleaning, centrifuging and drying to obtain a silkworm excrement-based porous carbon material; then mixing the copper sulfate solution with the copper sulfate solution according to the ratio of material to liquid of 1: 80 oscillating and mixing, centrifugally drying, putting into a plasma reactor, and introducing O2Inputting a voltage of 20V, modifying for 10min, carrying out surface modification, cleaning after modification, and drying to obtain the modified silkworm excrement-based hierarchical porous carbon material.
2. The domestic sewage treatment agent according to claim 1, wherein the domestic sewage treatment agent comprises the following raw materials in parts by weight: 12-15 parts of polyferric trichloride, 25-30 parts of sepiolite, 25-30 parts of bentonite, 10-12 parts of sodium hydroxide, 12-15 parts of polyacrylamide, 10-12 parts of sodium carbonate, 3-5 parts of a bio-based porous composite material and 5-8 parts of a modified silkworm excrement-based hierarchical porous carbon material.
3. The domestic sewage treatment agent according to claim 1, wherein the domestic sewage treatment agent comprises the following raw materials in parts by weight: 15 parts of polyferric trichloride, 25 parts of sepiolite, 30 parts of bentonite, 10 parts of sodium hydroxide, 15 parts of polyacrylamide, 10 parts of sodium carbonate, 5 parts of bio-based porous composite material and 5 parts of modified silkworm excrement-based hierarchical porous carbon material.
4. The preparation method of the domestic sewage treatment agent according to any one of claims 1 to 3, wherein the domestic sewage treatment agent is obtained by weighing raw materials according to parts by weight, mixing sepiolite, bentonite, sodium carbonate and a bio-based porous composite material, crushing, sieving with a 50-100 mesh sieve, putting into a container, adding polyacrylamide and polyferric trichloride, continuously stirring and uniformly mixing for 10-20 minutes, adding sodium hydroxide, stirring and mixing for 10-20 minutes, controlling the mixing temperature to be less than 55 ℃, adding a modified silkworm excrement-based hierarchical pore carbon material, and stirring and uniformly mixing.
5. The method of using a domestic sewage treatment agent according to any one of claims 1 to 3, wherein 0.1 to 0.2kg of the domestic sewage treatment agent is added per 1 cubic meter of the domestic sewage, and the sewage agitator is started for 10 to 30 minutes to stop agitation after the domestic sewage treatment agent sufficiently contacts the sewage, thereby allowing the domestic sewage treatment agent to react with the sewage.
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| CN108557916A (en) * | 2018-03-30 | 2018-09-21 | 河南金盾环保设备安装工程有限公司 | A kind of high efficiency sewage treating agent and preparation method thereof |
| CN108773886A (en) * | 2018-07-09 | 2018-11-09 | 佛山舒宜添科技有限公司 | A kind of textile waste cleanser and preparation method thereof |
| CN109847716B (en) * | 2018-12-10 | 2021-12-24 | 哈尔滨工程大学 | Natural mineral-based uranium extraction adsorbent from seawater and preparation method thereof |
| CN110227415A (en) * | 2019-05-31 | 2019-09-13 | 上海应用技术大学 | The method for preparing acid gas adsorption agent as raw material using natural biomass silkworm excrement |
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| CN105712495A (en) * | 2016-04-19 | 2016-06-29 | 肥东县柯文斌家庭农场 | Water body clarifying agent capable of improving water body self-purifying capacity |
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