CN111226982A - Sewage disinfection powder and preparation method and use method thereof - Google Patents

Sewage disinfection powder and preparation method and use method thereof Download PDF

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CN111226982A
CN111226982A CN202010096991.3A CN202010096991A CN111226982A CN 111226982 A CN111226982 A CN 111226982A CN 202010096991 A CN202010096991 A CN 202010096991A CN 111226982 A CN111226982 A CN 111226982A
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sewage
powder
sodium
disinfection
polyphosphate
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余京儒
李忠良
陈福海
樊莉贤
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Sichuan Shuiprince Environmental Technology Co Ltd
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Sichuan Shuiprince Environmental Technology Co Ltd
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/02—Sulfur; Selenium; Tellurium; Compounds thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/22—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients stabilising the active ingredients
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/14—Boron; Compounds thereof

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Abstract

The invention discloses sewage disinfection powder and a preparation method and a using method thereof, and belongs to the technical field of water disinfection treatment. The invention takes potassium peroxymonosulfate composite salt and sodium dichloroisocyanurate as sterilization components of the disinfection powder, and then is combined with stable and synergistic components such as boric anhydride, sodium chloride and the like, thereby overcoming the problems of high safety risk, high disinfection cost and the like of the existing sewage disinfectants and disinfection methods.

Description

Sewage disinfection powder and preparation method and use method thereof
Technical Field
The invention relates to the technical field of water disinfection treatment, in particular to sewage disinfection powder and a preparation method and a use method thereof.
Background
Hospital sewage and town sewage contain a large amount of pathogenic microorganisms, and can be discharged into town sewage pipe networks or natural water bodies only by disinfection treatment.
At present, the sewage disinfection method mainly comprises a sodium hypochlorite method, a liquid chlorine method, a chlorine dioxide method and an ozone method.
Wherein, the sodium hypochlorite method: the method has wide application due to low price and convenient use. However, sodium hypochlorite has weak disinfection capability and poor stability; especially in summer, the loss of effective components is fast, and explosion accidents are easy.
Liquid chlorine method: it has strong disinfection capacity and low cost, and is widely used for disinfection of tap water and sewage. However, chlorine is a gas with strong irritation, high toxicity and combustion supporting, and special equipment and facilities are needed for transportation, storage and use, so that the chlorine is only suitable for places with large using amount, is not suitable for the disinfection of sewage in common hospitals, and is not suitable for small sewage treatment plants.
Chlorine dioxide process: chlorine dioxide (C1O)2) Is a strong oxidant, and can kill bacteria propagules, cell spores, fungi, mycobacteria, viruses, etc. Chlorine dioxide is flammable, explosive, toxic, difficult to produce, transport and store, and is generally manufactured on site. The chlorine dioxide prepared on site has the safety risks of strong corrosivity, high toxicity, flammability, explosiveness and the like, the purchase, storage and use of the used raw materials of hydrochloric acid and sodium chlorate relate to easily prepared toxic and dangerous chemicals, and the actual application is strictly controlled.
Ozone disinfection: the ozone disinfection can be widely applied to the disinfection of urban water supply, urban sewage and hospital sewage. Ozone disinfection overcomes the hazards of chlorine during transportation, storage and handling. The disinfectant has short disinfection time, can improve the quality of sewage, and is an excellent disinfectant. Ozone must be manufactured on site, the power consumption is large, the disinfection cost is high, and electrical elements are easy to break, so that the ozone is not widely applied.
At present, a disinfectant prepared from potassium hydrogen persulfate compound, sodium chloride, sulfamic acid and the like is adopted by people and can be used for disinfecting sewage. However, the content of the effective components of the disinfection powder is low, about 10 percent of the effective chlorine, the disinfection powder is used for sewage disinfection, the dosage is large, and the cost is high.
Potassium monopersulfate, sodium dichloroisocyanurate, dodecyldimethylbenzylammonium chloride, sodium chlorite and the like are also used to prepare disinfection powder. However, this formulation has the following disadvantages: (1) a security risk. Potassium hydrogen peroxymonosulfate and sodium dichloroisocyanurate are used as oxidizing agents, dodecyl dimethyl benzyl ammonium chloride and sodium chlorite are used as reducing agents, chemical reaction can occur when the potassium hydrogen peroxymonosulfate and the sodium dichloroisocyanurate are contacted with each other, toxic gas is generated, and combustion and human poisoning are easily caused. (2) The product stability is poor. During the storage period, the oxidation and reduction thereof react to cause the loss of effective components. (3) The storage period of the aqueous solution is short. In the aqueous solution, the reaction between the reducing component and the oxidizing component is faster, the effective components are reduced quickly, and the drug effects are mutually offset.
The potassium hydrogen peroxymonosulfate compound salt and the sodium dichloroisocyanurate compound are applied to sewage disinfection. The water content of the commercial sodium dichloroisocyanurate is generally more than 3 percent and is generally between 4 and 6 percent, and the sodium dichloroisocyanurate is contacted with potassium peroxymonosulfate composite salt to cause decomposition and release oxygen, hypochlorous acid and chlorine, thereby easily causing safety accidents. Especially, a combustion accident is easily caused in summer. At present, the product has poor stability and is not beneficial to transportation and storage. And the existing disinfectants and disinfection methods have the problems of high safety risk, high disinfection cost and the like.
Disclosure of Invention
The invention aims to provide sewage disinfection powder and a preparation method and a using method thereof, and aims to solve the problems of poor stability, high safety risk and high disinfection cost of the existing sewage disinfectants and disinfection methods.
The technical scheme for solving the technical problems is as follows:
a sewage disinfection powder, comprising: 10-35 wt% of potassium hydrogen peroxymonosulfate composite salt, 60-80 wt% of sodium dichloroisocyanurate, 1-10 wt% of boric anhydride, 0.5-1.5 wt% of cyanuric acid and 0-0.5 wt% of halide.
The invention takes potassium peroxymonosulfate composite salt and sodium dichloroisocyanurate as sterilization components of the disinfection powder, and then is combined with stable and synergistic components such as boric anhydride, sodium chloride and the like, thereby overcoming the problems of high safety risk, high disinfection cost and the like of the existing sewage disinfectants and disinfection methods.
The invention selects sodium dichloroisocyanurate as one of the main sterilization components and utilizes dichloroisocyanuric acidThe hypochlorous acid generated after the sodium acid is dissolved in the water realizes disinfection and sterilization. Hypochlorous acid is a neutral molecule, is easily adsorbed on the surface of the microorganism, passes through a cell membrane and enters the interior of the microorganism to play a role in oxidation sterilization. Part of hypochlorous acid is decomposed to generate nascent oxygen [ O ]]And Cl2Oxidizing and chlorinating microbial proteins, denaturing bacterial proteins, inactivating bacterial enzymes, and thus inactivating microorganisms.
The chemical process of sodium dichloroisocyanurate in water solution is as follows:
C3Cl2N3NaO3+2H2O→H2C3N3O3Na+2HClO；
HClO→HCl+[O]；
HClO+H++Cl-→H2O+Cl2。
the invention selects potassium monopersulfate composite salt as one of the main sterilization components, after the potassium monopersulfate composite salt is dissolved in water, the effective component potassium monopersulfate generates peroxydisulfate, and the peroxydisulfate generates nascent oxygen [ O ] and hydrogen peroxide. Hydrogen persulfate, nascent oxygen [ O ] and hydrogen peroxide can oxidize the sulfur radical on the bacterial enzyme into disulfide radical to deactivate the bacterial enzyme; and oxidizing proteins of the microorganisms, denaturing them, and coagulating them until they die.
The chemical process of potassium peroxymonosulfate complex salt in water solution is as follows:
2KHSO5·KHSO4·K2SO4→HSO4 -+SO4 2-+5K++2HSO5 -；
HSO5 -→HSO4 -+[O]；
HSO5 -+H2O→HSO4 -+H2O2。
according to the invention, sodium dichloroisocyanurate is used for replacing part of potassium peroxymonosulfate composite salt for compounding, on one hand, the use amount of potassium peroxymonosulfate composite salt can be reduced due to the high content of the effective components of sodium dichloroisocyanurate and the low price, so that the production cost and the use cost are reduced; on the other hand, as sodium dichloroisocyanurate is a chlorine-containing disinfectant, hospital sewage with high organic matter content and high turbidity is easily wrapped by organic matters and suspended matters, so that the disinfection effect is reduced, and the existence of potassium monopersulfate composite salt can make up for the defect. Meanwhile, the content of residual chlorine in the sewage can be reduced due to the reduction of the use amount of the sodium dichloroisocyanurate. The invention ensures good disinfection effect through the synergistic cooperation of the potassium monopersulfate composite salt and the dichloroisocyanuric acid, so that the sewage discharge reaches the standard, and the cost is reduced.
The invention improves the stability of the sodium dichloroisocyanurate and potassium hydrogen peroxymonosulfate composite salt in the processes of transportation, storage and use by adding boric anhydride, cyanuric acid and the like as stabilizers. The sodium dichloroisocyanurate and potassium peroxymonosulfate composite salt is unstable to water, and can release hypochlorous acid, chlorine and [ O ] after absorbing water, so that the activity is reduced when the salt is used; in addition, safety accidents such as poisoning and burning are easily caused. The potassium monopersulfate composite salt is extremely unstable to water, and the water content in the commercial potassium monopersulfate composite salt is generally controlled to be about 0.3 percent.
Boric anhydride is an excellent dehydrating agent which absorbs water to generate boric acid B2O3+H2O→2H3BO3The reaction is not reversed below 100 ℃ and 1.3g of boron anhydride can theoretically remove 1g of water. The invention stabilizes effective components and prevents safety accidents by adding the boric anhydride.
After the product is dissolved, boric anhydride reacts with water to generate boric acid, the pH value of the aqueous solution is reduced, and H is provided+Make ClO-Changing into HClO to enhance the sterilization effect; boric acid is also a bactericide.
The invention improves the stability of the product in use by adding cyanuric acid and reduces the volatilization of effective components. After the disinfection powder is dissolved, hypochlorous acid, hypobromous acid and chlorine gas are generated and are volatile; cyanuric acid in combination therewith reduces volatilization losses.
Cyanuric acid (H)3C3N3O3) The reaction with hypochlorous acid and chlorine gas proceeds as follows:
C3Cl2N3NaO3+2H2O→H2C3N3O3Na+2HClO↑；
HClO+H++Cl-→H2O+Cl2↑；
H3C3N3O3+HClO→H2C3ClN3O3+2H2O；
H3C3N3O3+Cl2→H2C3ClN3O3+HCl。
the valence-variable metal ions undergo oxidation-reduction reaction with potassium peroxymonosulfate, hypochlorous acid [ HClO ], and active oxygen [ O ], causing decomposition.
Further, in a preferred embodiment of the present invention, the sewage disinfecting powder further comprises: 0.1-1.5 wt% of polyphosphate.
Further, in a preferred embodiment of the present invention, the polyphosphate is at least one of sodium hexametaphosphate and sodium acid pyrophosphate.
The invention improves the stability of the product water solution by adding polyphosphate, which has the capability of complexing variable valence metal ions such as iron, manganese, copper and the like in water and prevents the metal ions from being mixed with potassium hydrogen peroxymonosulfate and hypochlorous acid [ HClO ]]Active oxygen [ O ]]The reaction failed. Such as sodium hexametaphosphate complexed manganese (NaPO)3)6+Mn2+→Na2(Mn2(PO3)6)+4Na+。
Further, in a preferred embodiment of the present invention, the sewage disinfecting powder further comprises: 1-10 wt% of anhydrous sodium sulfate.
The anhydrous sodium sulfate adopted by the invention has the functions of absorbing free moisture to a certain extent, enhancing the product fluidity and preventing agglomeration.
Further, in a preferred embodiment of the present invention, the halide is at least one of sodium bromide and sodium chloride.
The invention improves the sterilizing capability of the product by adding the halide.
After the hypobromous acid molecule participates in sterilization, bromide ion Br is released-The hypobromous acid content in the water body is in dynamic equilibrium:
Figure BDA0002385438370000051
the trace sodium chloride or sodium bromide is used for providing bromide ion Br-(Cl-). Such as Br-And reacting with potassium hydrogen peroxymonosulfate or sodium dichloroisocyanurate to generate hypobromous acid, wherein the bactericidal ability of the hypobromous acid is stronger than that of hypochlorous acid.
The preparation method of the sewage disinfection powder comprises the following steps:
mixing the sodium dichloroisocyanurate with boric anhydride, anhydrous sodium sulfate, sodium chloride, sodium bromide and polyphosphate for the first time, and then adding potassium monopersulfate composite salt for the second time to prepare the sewage disinfection powder.
Further, in a preferred embodiment of the present invention, the mixed environmental conditions include: the temperature is lower than 30 deg.C, relative humidity is lower than 20%, and the time for mixing for the first time and the second time is 10-15 min.
Further, in a preferred embodiment of the present invention, the preparation method further comprises: quantitatively subpackaging the prepared sewage disinfection powder in a subpackaging environment with the temperature lower than 30 ℃ and the relative humidity lower than 20%, and hermetically storing.
The use method of the sewage disinfection powder comprises the following steps:
preparing the disinfection powder into 1-2 wt% aqueous solution, adding the aqueous solution into the pretreated sewage, and uniformly mixing.
Further, in a preferred embodiment of the present invention, the preprocessing comprises: primary filtration, biochemistry, coagulation, precipitation and filtration.
The invention has the following beneficial effects:
1. the sewage disinfection powder has stable property, is easy to store, transport and use, and has high system safety and simple operation and management.
2. The disinfectant powder has good disinfection effect, and potassium hydrogen peroxymonosulfate composite salt, sodium dichloroisocyanurate and halide are compounded for use, so that the synergistic effect is realized, the effect is stronger than that of single use, the using amount of the disinfectant is reduced, and the use cost is reduced.
3. The disinfection method of the invention has less disinfection by-products, potassium hydrogen peroxymonosulfate compound salt is a disinfectant without chlorine, and no disinfection by-products such as trichloromethane and the like are generated; can be used together with sodium dichloroisocyanurate to reduce disinfection by-products.
4. The invention improves the stability of the sodium dichloroisocyanurate and potassium hydrogen peroxymonosulfate composite salt in the processes of transportation, storage and use by adding boric anhydride, cyanuric acid and the like as stabilizers. In addition, boric anhydride is dissolved in water to generate boric acid, and the boric acid can be used as a bactericide and also has the function of adjusting the pH value of an aqueous solution.
Detailed Description
The principles and features of this invention are described below in conjunction with embodiments, which are included to explain the invention and not to limit the scope of the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1:
the sewage disinfection powder of this embodiment includes:
10 wt% of potassium hydrogen peroxymonosulfate composite salt, 80 wt% of sodium dichloroisocyanurate, 8.5 wt% of boric anhydride and 1.5 wt% of cyanuric acid.
The preparation method of the sewage disinfection powder comprises the following steps: mixing the sodium dichloroisocyanurate with boric anhydride, anhydrous sodium sulfate, sodium chloride, sodium bromide and polyphosphate for the first time, and then adding potassium monopersulfate composite salt for the second time to prepare the sewage disinfection powder. Then quantitatively subpackaging the prepared sewage disinfection powder in a subpackaging environment with the temperature lower than 30 ℃ and the relative humidity lower than 20%, and hermetically storing.
Wherein the mixed environmental conditions include: the temperature is lower than 30 ℃, the relative humidity is lower than 20%, and the time for mixing for the first time and the second time is 10 min.
The application method of the sewage disinfection powder comprises the following steps: preparing the disinfection powder into 1 wt% aqueous solution, adding the aqueous solution into the pretreated sewage, and uniformly mixing.
Wherein the pretreatment comprises: primary filtering, biochemical treatment, coagulation, precipitation and filtration.
Example 2:
the sewage disinfection powder of this embodiment includes:
29 wt% of potassium hydrogen peroxymonosulfate composite salt, 60 wt% of sodium dichloroisocyanurate, 10 wt% of boric anhydride and 1 wt% of cyanuric acid.
The preparation method of the sewage disinfection powder comprises the following steps: mixing the sodium dichloroisocyanurate with boric anhydride, anhydrous sodium sulfate, sodium chloride, sodium bromide and polyphosphate for the first time, and then adding potassium monopersulfate composite salt for the second time to prepare the sewage disinfection powder. Then quantitatively subpackaging the prepared sewage disinfection powder in a subpackaging environment with the temperature lower than 30 ℃ and the relative humidity lower than 20%, and hermetically storing.
Wherein the mixed environmental conditions include: the temperature is lower than 30 deg.C, relative humidity is lower than 20%, and the time for mixing for the first time and the second time is 12 min.
The application method of the sewage disinfection powder comprises the following steps: the disinfection powder is prepared into 1.5 wt% aqueous solution, added into the pretreated sewage and mixed evenly.
Wherein the pretreatment comprises: primary filtering, biochemical treatment, coagulation, precipitation and filtration.
Example 3:
the sewage disinfection powder of this embodiment includes:
35 wt% of potassium hydrogen peroxymonosulfate composite salt, 63.5 wt% of sodium dichloroisocyanurate, 1 wt% of boric anhydride and 0.5 wt% of cyanuric acid.
The preparation method of the sewage disinfection powder comprises the following steps: mixing the sodium dichloroisocyanurate with boric anhydride, anhydrous sodium sulfate, sodium chloride, sodium bromide and polyphosphate for the first time, and then adding potassium monopersulfate composite salt for the second time to prepare the sewage disinfection powder. Then quantitatively subpackaging the prepared sewage disinfection powder in a subpackaging environment with the temperature lower than 30 ℃ and the relative humidity lower than 20%, and hermetically storing.
Wherein the mixed environmental conditions include: the temperature is lower than 30 deg.C, relative humidity is lower than 20%, and the time for mixing for the first time and the second time is 15 min.
The application method of the sewage disinfection powder comprises the following steps: the disinfection powder is prepared into 2 wt% aqueous solution, added into the pretreated sewage and mixed evenly.
Wherein the pretreatment comprises: primary filtering, biochemical treatment, coagulation, precipitation and filtration.
Example 4:
the sewage disinfection powder of this embodiment includes:
10 wt% of potassium hydrogen peroxymonosulfate composite salt, 80 wt% of sodium dichloroisocyanurate, 8.4 wt% of boric anhydride, 1.5 wt% of cyanuric acid and 0.1 wt% of halide. Wherein the halide is sodium bromide.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 1.
Example 5:
the sewage disinfection powder of this embodiment includes:
28.5 wt% of potassium hydrogen peroxymonosulfate complex salt, 60 wt% of sodium dichloroisocyanurate, 10 wt% of boric anhydride, 1 wt% of cyanuric acid and 0.5 wt% of halide. Wherein the halide is sodium chloride.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 2.
Example 6:
the sewage disinfection powder of this embodiment includes:
35 wt% of potassium hydrogen peroxymonosulfate composite salt, 63.2 wt% of sodium dichloroisocyanurate, 1 wt% of boric anhydride, 0.5 wt% of cyanuric acid and 0.3 wt% of halide. Wherein the halide is a mixture of sodium chloride and sodium bromide.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 3.
Example 7:
the sewage disinfection powder of this embodiment includes:
10 wt% of potassium hydrogen peroxymonosulfate composite salt, 80 wt% of sodium dichloroisocyanurate, 8.4 wt% of boric anhydride, 1.5 wt% of cyanuric acid and 0.1 wt% of polyphosphate. Wherein the polyphosphate is sodium hexametaphosphate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 1.
Example 8:
the sewage disinfection powder of this embodiment includes:
27.5 wt% of potassium hydrogen peroxymonosulfate composite salt, 60 wt% of sodium dichloroisocyanurate, 10 wt% of boric anhydride, 1 wt% of cyanuric acid and 1.5 wt% of polyphosphate. Wherein the polyphosphate is sodium acid pyrophosphate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 2.
Example 9:
the sewage disinfection powder of this embodiment includes:
35 wt% of potassium hydrogen peroxymonosulfate composite salt, 63 wt% of sodium dichloroisocyanurate, 1 wt% of boric anhydride, 0.5 wt% of cyanuric acid and 0.5 wt% of polyphosphate. Wherein the polyphosphate is sodium hexametaphosphate and sodium acid pyrophosphate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 3.
Example 10:
the sewage disinfection powder of this embodiment includes:
10 wt% of potassium hydrogen peroxymonosulfate composite salt, 80 wt% of sodium dichloroisocyanurate, 7.5 wt% of boric anhydride, 1.5 wt% of cyanuric acid and 1 wt% of anhydrous sodium sulfate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 1.
Example 11:
the sewage disinfection powder of this embodiment includes:
19 wt% of potassium hydrogen peroxymonosulfate composite salt, 60 wt% of sodium dichloroisocyanurate, 10 wt% of boric anhydride, 1 wt% of cyanuric acid and 10 wt% of anhydrous sodium sulfate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 2.
Example 12:
the sewage disinfection powder of this embodiment includes:
35 wt% of potassium hydrogen peroxymonosulfate composite salt, 61.5 wt% of sodium dichloroisocyanurate, 1 wt% of boric anhydride, 0.5 wt% of cyanuric acid and 2 wt% of anhydrous sodium sulfate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 3.
Example 13:
the sewage disinfection powder of this embodiment includes:
10 wt% of potassium hydrogen peroxymonosulfate composite salt, 80 wt% of sodium dichloroisocyanurate, 7.4 wt% of boric anhydride, 1.5 wt% of cyanuric acid, 1 wt% of anhydrous sodium sulfate and 0.1 wt% of polyphosphate. Wherein the polyphosphate is sodium hexametaphosphate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 1.
Example 14:
the sewage disinfection powder of this embodiment includes:
17.5 wt% of potassium hydrogen peroxymonosulfate composite salt, 60 wt% of sodium dichloroisocyanurate, 10 wt% of boric anhydride, 1 wt% of cyanuric acid, 10 wt% of anhydrous sodium sulfate and 1.5 wt% of polyphosphate. Wherein the polyphosphate is sodium acid pyrophosphate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 2.
Example 15:
the sewage disinfection powder of this embodiment includes:
35 wt% of potassium hydrogen peroxymonosulfate composite salt, 61 wt% of sodium dichloroisocyanurate, 1 wt% of boric anhydride, 0.5 wt% of cyanuric acid, 2 wt% of anhydrous sodium sulfate and 0.5 wt% of polyphosphate. Wherein the polyphosphate is sodium hexametaphosphate and sodium acid pyrophosphate.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 3.
Example 16:
the sewage disinfection powder of this embodiment includes:
10 wt% of potassium hydrogen peroxymonosulfate composite salt, 80 wt% of sodium dichloroisocyanurate, 7.4 wt% of boric anhydride, 1.5 wt% of cyanuric acid, 1 wt% of anhydrous sodium sulfate and 0.1 wt% of halide. Wherein the halide is sodium bromide.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 1.
Example 17:
the sewage disinfection powder of this embodiment includes:
18.5 wt% of potassium hydrogen peroxymonosulfate composite salt, 60 wt% of sodium dichloroisocyanurate, 10 wt% of boric anhydride, 1 wt% of cyanuric acid, 10 wt% of anhydrous sodium sulfate and 0.5 wt% of halide. Wherein the halide is sodium chloride.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 2.
Example 18:
the sewage disinfection powder of this embodiment includes:
35 wt% of potassium hydrogen peroxymonosulfate composite salt, 61.2 wt% of sodium dichloroisocyanurate, 1 wt% of boric anhydride, 0.5 wt% of cyanuric acid, 2 wt% of anhydrous sodium sulfate and 0.3 wt% of halide. Wherein the halide is a mixture of sodium chloride and sodium bromide.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 3.
Example 19:
the sewage disinfection powder of this embodiment includes:
10 wt% of potassium hydrogen peroxymonosulfate composite salt, 80 wt% of sodium dichloroisocyanurate, 7.4 wt% of boric anhydride, 1.5 wt% of cyanuric acid, 0.1 wt% of polyphosphate and 0.1 wt% of halide. Wherein the polyphosphate is sodium hexametaphosphate; the halide is sodium chloride.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 1.
Example 20:
the sewage disinfection powder of this embodiment includes:
27 wt% of potassium hydrogen peroxymonosulfate complex salt, 60 wt% of sodium dichloroisocyanurate, 10 wt% of boric anhydride, 1 wt% of cyanuric acid, 1.5 wt% of polyphosphate and 0.5 wt% of halide. Wherein the polyphosphate is sodium acid pyrophosphate; the halide is sodium chloride.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 2.
Example 21:
the sewage disinfection powder of this embodiment includes:
35 wt% of potassium hydrogen peroxymonosulfate composite salt, 62.7 wt% of sodium dichloroisocyanurate, 1 wt% of boric anhydride, 0.5 wt% of cyanuric acid, 0.5 wt% of polyphosphate and 0.3 wt% of halide. Wherein the polyphosphate is sodium hexametaphosphate and sodium acid pyrophosphate; the halide is sodium chloride and sodium bromide.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 3.
Example 22:
the sewage disinfection powder of this embodiment includes:
10 wt% of potassium hydrogen peroxymonosulfate composite salt, 80 wt% of sodium dichloroisocyanurate, 7.3 wt% of boric anhydride, 1.5 wt% of cyanuric acid, 1 wt% of anhydrous sodium sulfate, 0.1 wt% of polyphosphate and 0.1 wt% of halide. Wherein the polyphosphate is sodium hexametaphosphate; the halide is sodium chloride.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 1.
Example 23:
the sewage disinfection powder of this embodiment includes:
17 wt% of potassium hydrogen peroxymonosulfate composite salt, 60 wt% of sodium dichloroisocyanurate, 10 wt% of boric anhydride, 1 wt% of cyanuric acid, 10 wt% of anhydrous sodium sulfate, 1.5 wt% of polyphosphate and 0.5 wt% of halide. Wherein the polyphosphate is sodium acid pyrophosphate; the halide is sodium chloride.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 2.
Example 24:
the sewage disinfection powder of this embodiment includes:
35 wt% of potassium monopersulfate complex salt, 60.7 wt% of sodium dichloroisocyanurate, 1 wt% of boric anhydride, 0.5 wt% of cyanuric acid, 2 wt% of anhydrous sodium sulfate, 0.5 wt% of polyphosphate and 0.3 wt% of halide. Wherein the polyphosphate is sodium hexametaphosphate and sodium acid pyrophosphate; the halide is sodium chloride and sodium bromide.
The preparation method and the using method of the sewage sterilizing powder of the embodiment are the same as those of the embodiment 3.
Test example 1
The sewage disinfection powder of this experimental example includes:
11.0 percent of potassium hydrogen peroxymonosulfate composite salt, 75.0 percent of sodium dichloroisocyanurate, 3.0 percent of boric anhydride, 8.9 percent of anhydrous sodium sulfate, 1.0 percent of cyanuric acid, 1.0 percent of sodium hexametaphosphate and 0.1 percent of sodium bromide.
The preparation method of the sewage sterilizing powder of the experimental example is the same as that of the example 2.
Test example 2
The sewage disinfection powder of this example includes:
14.0 percent of potassium hydrogen peroxymonosulfate composite salt, 74.0 percent of sodium dichloroisocyanurate, 2.9 percent of boric anhydride, 7.0 percent of anhydrous sodium sulfate, 1.0 percent of cyanuric acid, 1.0 percent of sodium hexametaphosphate and 0.1 percent of sodium bromide.
The preparation method of the sewage sterilizing powder of the experimental example is the same as that of the example 2.
Test example 3
The sewage disinfection powder of this experimental example includes:
17.0 percent of potassium hydrogen peroxymonosulfate composite salt, 73.0 percent of sodium dichloroisocyanurate, 2.9 percent of boric anhydride, 5.0 percent of anhydrous sodium sulfate, 1.0 percent of cyanuric acid, 1.0 percent of sodium hexametaphosphate and 0.1 percent of sodium bromide.
The preparation method of the sewage sterilizing powder of the experimental example is the same as that of the example 2.
Test example 4
The sewage disinfection powder of this experimental example includes:
20.0 percent of potassium hydrogen peroxymonosulfate composite salt, 72.0 percent of sodium dichloroisocyanurate, 2.9 percent of boric anhydride, 3.0 percent of anhydrous sodium sulfate, 1.0 percent of cyanuric acid, 1.0 percent of sodium hexametaphosphate and 0.1 percent of sodium bromide.
The preparation method of the sewage sterilizing powder of the experimental example is the same as that of the example 2.
Test example 5
The sewage disinfection powder of this experimental example includes:
23.0 percent of potassium hydrogen peroxymonosulfate composite salt, 71.0 percent of sodium dichloroisocyanurate, 2.8 percent of boric anhydride, 1.1 percent of anhydrous sodium sulfate, 1.0 percent of cyanuric acid, 1.0 percent of sodium hexametaphosphate and 0.1 percent of sodium bromide.
The preparation method of the sewage sterilizing powder of the experimental example is the same as that of the example 2.
Test example 6
The sewage disinfection powder of this experimental example includes:
26.0 percent of potassium hydrogen peroxymonosulfate composite salt, 70.0 percent of sodium dichloroisocyanurate, 2.8 percent of boric anhydride, 0.0 percent of anhydrous sodium sulfate, 1.0 percent of cyanuric acid, 0.1 percent of sodium hexametaphosphate and 0.1 percent of sodium bromide.
The preparation method of the sewage sterilizing powder of the experimental example is the same as that of the example 2.
Results analysis 1
The above test examples 1-6 were prepared into disinfectant solutions, which were used to disinfect sewage in a hospital for 60 min. The detection results show that the test examples 1-6 all show good disinfection and sterilization effects, and the number of escherichia coli and the residual chlorine amount both meet the emission standard. The specific operation is as follows: a disinfectant powder was prepared in accordance with test example 5, and 20g of the disinfectant powder was dissolved in 1000ml of tap water to give a disinfectant solution having a concentration of 20 mg/ml. Taking hospital sewage behind the filter, adding disinfectant (20mg/ml), stirring uniformly, standing for disinfection for 60min, sampling for detection, and obtaining the following results:
fecal coliform count and residual chlorine value in hospital sewage before and after disinfection
Figure BDA0002385438370000141
As can be seen from the above table, when the dosage of the disinfection powder is 25mg/L, the indexes of fecal coliform bacteria and residual chlorine in hospital sewage can meet the requirements of the national standard GB18466-2005 'discharge Standard of Water pollutants for medical institutions'.
Results analysis 2
The test examples 1 to 6 were prepared into disinfectant solutions, and the sewage of a sewage treatment plant was sterilized for 30 min. The detection results show that the test examples 1-6 all show good disinfection and sterilization effects, and the quantity of fecal escherichia coli reaches the emission standard. The specific operation is as follows: a disinfectant powder was prepared in accordance with test example 1, and 20g of the disinfectant powder was dissolved in 1000ml of tap water to give a disinfectant solution having a concentration of 20 mg/ml. Taking sewage behind the filter, adding disinfectant (20mg/ml), uniformly stirring, standing for disinfection for 30min, sampling for detection, and obtaining the following results:
number of fecal coliforms in sewage before and after disinfection
Figure BDA0002385438370000151
As can be seen from the table above, when the adding amount of the disinfectant reaches 3mg/L, the number of fecal coliform bacteria in the sewage reaches the requirement of the first-class B standard of pollutant discharge Standard of municipal wastewater treatment plant (GB 18918-2002).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A sewage disinfection powder, which is characterized by comprising: 10-35 wt% of potassium hydrogen peroxymonosulfate composite salt, 60-80 wt% of sodium dichloroisocyanurate, 1-10 wt% of boric anhydride, 0.5-1.5 wt% of cyanuric acid and 0-0.5 wt% of halide.
2. The sewage disinfectant powder as set forth in claim 1, further comprising: 0.1-1.5 wt% of polyphosphate.
3. The sewage disinfectant powder as recited in claim 2, wherein said polyphosphate is at least one of sodium hexametaphosphate and sodium acid pyrophosphate.
4. The sewage disinfectant powder as set forth in claim 1 or 2, further comprising: 1-10 wt% of anhydrous sodium sulfate.
5. The sewage disinfectant powder as recited in claim 1, wherein said halide is at least one of sodium bromide and sodium chloride.
6. The method for preparing sewage sterilizing powder according to any one of claims 1 to 5, comprising the steps of:
mixing the sodium dichloroisocyanurate with boric anhydride, anhydrous sodium sulfate, sodium chloride, sodium bromide and polyphosphate for the first time, and then adding potassium monopersulfate composite salt for the second time to prepare the sewage disinfection powder.
7. The method for preparing sewage sterilizing powder according to claim 6, wherein the mixed environmental conditions include: the temperature is lower than 30 deg.C, relative humidity is lower than 20%, and the time for mixing for the first time and the second time is 10-15 min.
8. The method for preparing sewage sterilizing powder according to claim 6, further comprising: quantitatively subpackaging the prepared sewage disinfection powder in a subpackaging environment with the temperature lower than 30 ℃ and the relative humidity lower than 20%, and hermetically storing.
9. The method for using sewage sterilizing powder according to any one of claims 1 to 5, comprising the steps of:
preparing the disinfection powder into an aqueous solution with the concentration of 1-2 wt%, adding the aqueous solution into the pretreated sewage, and uniformly mixing.
10. The method for using sewage sterilizing powder according to claim 9, wherein the pretreatment comprises: primary filtration, biochemistry, coagulation, precipitation and filtration.
CN202010096991.3A 2020-02-17 2020-02-17 Sewage disinfection powder and preparation method and use method thereof Pending CN111226982A (en)

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