CN110590009A - Intelligent cooperative disinfection method suitable for complex surface water treatment - Google Patents
Intelligent cooperative disinfection method suitable for complex surface water treatment Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- 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
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- C02F1/00—Treatment of water, waste water, or sewage
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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Abstract
The invention relates to an intelligent collaborative disinfection method suitable for complex surface water treatment, which comprises the following steps: firstly, performing emergency addition and chlorine dioxide addition on potassium permanganate for pre-oxidation treatment to remove algae, iron, manganese, chromaticity, smell, taste and the like in raw water, secondly, performing advanced treatment on a water body by using ozone-activated carbon, oxidizing the water body and adsorbing impurities, and finally, performing main disinfection on a clean water tank by using sodium hypochlorite to ensure that delivery indexes are qualified. The potassium permanganate, the chlorine dioxide, the ozone-activated carbon and the sodium hypochlorite are cooperatively applied, so that the problem of insufficient capacity of a single disinfectant is solved, and the water quality safety is ensured; all the online detection data can be transmitted to the Huate smart cloud platform, and are subjected to operational analysis, cooperative linkage and comprehensive regulation and control. The intelligent synergistic disinfection method for the complex surface water can realize intelligent synergistic disinfection of complex surface water treatment, achieves the effect that the index of the factory water is completely qualified, and is a complex surface water intelligent synergistic disinfection method which is worthy of wide popularization.
Description
Technical Field
The invention belongs to the field of water disinfection, and particularly relates to an intelligent synergistic disinfection method suitable for complex surface water treatment.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
With the accelerated progress of industrialization and population urbanization and the lag of the construction of corresponding environmental protection and pollution control facilities, a large amount of industrial wastewater and domestic sewage are discharged without being effectively treated, and in addition, agricultural non-point source drainage is added, so that the pollution condition of surface water sources becomes serious day by day, and the surface water sources of a plurality of water works are polluted to different degrees. In order to improve the safety of drinking water and the quality of drinking water, it is increasingly important to disinfect tap water. Conventional disinfection, such as liquid chlorine disinfection, chlorine dioxide disinfection and sodium hypochlorite disinfection, is a better disinfection option, but along with the deterioration of water quality, excessive single disinfectant is added for disinfection, which often cannot meet the requirement, on one hand, the single disinfectant has lower treatment efficiency, the water quality of effluent is difficult to achieve a more ideal effect, and the problem of overproof byproducts in water occurs; on the other hand, some disinfectants have high running cost and low automation and industrial treatment levels, and are difficult to meet the requirements of customers.
Disclosure of Invention
In order to overcome the above problems, the present invention provides an intelligent synergistic disinfection method suitable for complex surface water treatment, which is intended to at least partially solve at least one of the above technical problems. Through the effective combination of the pretreatment process, the strengthening conventional treatment process and the advanced treatment process, the effects of advantage synergy and disadvantage complementation are formed, multiple indexes of algae, iron, manganese, chromaticity, odor, bacteria, escherichia coli and the like of complex raw water can be synergistically treated, the water quality is ensured to be qualified, and the emergency capacity of resisting water quality change is greatly strengthened.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
an intelligent synergistic disinfection method for complex surface water treatment, comprising the following steps:
adding potassium permanganate into raw water for emergency addition and chlorine dioxide for pre-oxidation treatment, flocculation, precipitation and filtration;
carrying out advanced treatment on the water body by using ozone-activated carbon;
and (3) disinfecting the water body by adopting sodium hypochlorite to obtain the water purifying agent.
The application provides a wisdom collaborative disinfection method suitable for complicated surface water treatment, wisdom is in coordination with throwing of adjustment multiple disinfectant and is thrown the type and throw the dosage, through simple and easy, quick, effectual mode improvement to water disinfection ability, up to standard water supply or discharge to reach standard.
The research finds that: although a plurality of water treatment methods are available, the existing water treatment methods generally aim at treating specific types of sewage so as to meet the requirements of corresponding water quality. The surface water is often polluted by multiple kinds of domestic sewage, industrial sewage, agricultural sewage and the like due to wide flowing range, and meanwhile, due to different flowing regions, the composition of the same kind of pollution sources is greatly different, so that the composition of the surface water is complex, the water quality is greatly changed, and the treatment is difficult. Therefore, how to find a processing method which has simple processing technology, high efficiency, strong universality and convenient automation and industrialized operation becomes a technical difficulty which is needed to be broken through urgently. Therefore, the intelligent synergistic disinfection method for treating the complex surface water is provided through system analysis and large-scale experimental investigation of treatment rules of various poor raw water, can be used for synergistically treating various indexes of complex raw water such as algae, iron, manganese, chromaticity, odor, bacteria, escherichia coli and the like, greatly enhances the emergency capacity of resisting water quality change, and ensures that the water quality is qualified.
The research of the application finds that: for the treatment of complex surface water, potassium permanganate is firstly added to carry out emergency treatment on the water body to be treated, and then chlorine dioxide is added to carry out pre-oxidation and disinfection, so that the treatment effect on the water body is better than the treatment effect on the water body by firstly adding a chlorine dioxide solution and then adding a potassium permanganate solution. Therefore, in some embodiments, the adding amount of the potassium permanganate is 0.6-1.2 mg/L in terms of raw water amount, so as to improve the treatment effect of the water body.
The common oxidation disinfectants are of a great variety, potassium permanganate, chlorine dioxide, ozone-biological activated carbon and sodium hypochlorite are screened to form a synergistic disinfection method according to practice, the dosing is controlled quantitatively, so that the synergistic disinfection method can play different roles in different links of water treatment and disinfection, the advantages are synergistic, the disadvantages are complementary, various indexes related to disinfection are qualified in complex surface water treatment, and the risk capability of water plant on resisting water quality change is improved. Wherein potassium permanganate is used as an emergency addition agent, chlorine dioxide is used as a preoxidation agent, an ozone-biological activated carbon technology is used as an advanced treatment agent, and sodium hypochlorite is used as a main disinfectant. In some embodiments, the amount of the chlorine dioxide added into the raw water is 0.50-1.0 mg/L, and the pre-oxidation effect is effectively improved and the efficiency of subsequent advanced treatment and sodium hypochlorite disinfection is enhanced based on the raw water.
The research of the application finds that compared with the method of additionally arranging an ozone unit in front of an activated carbon filter tank, after the ozone-activated carbon filter tank is treated by ozone, organic pollutants in water can be effectively removed, sensory indexes such as color, odor and the like are improved, biological risks of Assimilable Organic Carbon (AOC) in a pipe network and risks of disinfection byproducts generated by chlorination are reduced, and the biological stability of water quality is improved. Therefore, in some embodiments, the ozone is added into the raw water in an amount of 1.0-2.5 mg/L, based on the raw water, so that the biological stability of the water quality and the removal rate of organic pollutants are improved, and sensory indexes such as color, odor and the like are improved.
This application is through huate wisdom cloud platform, with quality of water data and on-line measuring data collection, operational analysis, in coordination with the selection potassium permanganate, chlorine dioxide, ozone-active carbon and sodium hypochlorite disinfectant throw with kind and automatic adjustment throw with dose, can disinfect in coordination automatically, fast, effectually, guarantee that the quality of water index is qualified.
The smart cloud platform is not particularly limited in the application, and can be a commercially available smart cloud platform capable of automatically adjusting the adding amount of potassium permanganate, chlorine dioxide, ozone-activated carbon and sodium hypochlorite according to the online data feedback condition.
In some embodiments, the amount of the sodium hypochlorite added into the raw water is 0.5-2.0 mg/L, and the water body is disinfected according to the amount of the raw water to meet the discharge requirement.
In some embodiments, the adding point of the potassium permanganate is arranged at the upstream position of the raw water inlet pipeline. Potassium permanganate is a chemical substance with strong oxidizing ability, and is a crystal at normal temperature. At present, potassium permanganate is applied to the treatment process of drinking water as a pre-oxidation treatment agent. Proper potassium permanganate is added in the water treatment process, so that algae, iron, manganese and the like can be effectively removed, flocculation removal is facilitated, and certain sterilization and disinfection capabilities are achieved.
In some embodiments, the chlorine dioxide dosing point is disposed at a position downstream of the raw water inlet pipe. The chlorine dioxide disinfection has the characteristics of broad spectrum, high efficiency, small influence of pH and strong continuous disinfection capability, can effectively remove iron, manganese, chromaticity, smell, taste and the like in water, has strong killing capability on giardia and cryptosporidium, and does not generate chlorination reaction to generate carcinogens such as trichloromethane. The defect is that the problem that chlorite and chlorate exceed standards exists in the treated water body under the condition of excessive adding amount. The factory water limit of chlorite and chlorate is regulated to 0.7mg/L in the sanitary Standard for Drinking Water (GB5749-2006) of China, and related researches show that when chlorine dioxide is used alone for disinfection, the excessive addition amount of the chlorine dioxide causes the overproof risk of byproducts.
In some embodiments, the ozone is dosed to the ozone contact tank using a micro-porous aeration pan. The ozone-biological activated carbon technology combines ozone oxidation and activated carbon technology, can effectively remove organic pollutants in water, improve sensory indexes such as color, odor and the like, reduce the biological risk of Assimilable Organic Carbon (AOC) in a pipe network and the risk of disinfection byproducts generated by chlorination, improve the biological stability of water quality, ensure that the mutagenicity of the treated water is negative, and simultaneously can obviously remove pathogenic microorganisms such as algae, algal toxins, cryptosporidium and the like in the water and endocrine disruptors.
In some embodiments, the sodium hypochlorite adding point is arranged on a water inlet pipeline of a clean water tank. Sodium hypochlorite is a widely used disinfectant, and has the advantages of simple raw material management, low operation cost and almost no generation of chlorate and chlorite byproducts. The disadvantages are that the oxidation capability is relatively weak, the method is not suitable for pre-oxidation, and the self-decomposition speed of the product is relatively high.
The invention also provides water treated by any one of the methods, the chroma of the treated water is less than 5 ℃, the water is free from peculiar smell and peculiar smell, the iron content is less than 0.05mg/L, the manganese content is less than 0.02mg/L, the pH value is 7.5-8.1, the total number of bacteria is less than 1CFU/100mL, and escherichia coli is not detected; residual chlorine value is 0.30-1.50 mg/L, chlorite concentration is less than 0.35mg/L, and chlorate concentration is less than 0.15 mg/L.
The invention has the beneficial effects that:
(1) the invention screens and uses four different oxidizing disinfectants, namely potassium permanganate, chlorine dioxide, ozone-activated carbon and sodium hypochlorite, aiming at different links of water treatment, and plays respective unique effects to form the effects of advantage synergy and disadvantage complementation.
(2) The invention can cooperatively treat various indexes of algae, iron, manganese, chromaticity, odor, bacteria, escherichia coli and the like of complex raw water, ensures qualified water quality and greatly enhances the emergency capacity of resisting water quality change.
(3) The adding position, adding method and adding dosage of the potassium permanganate, the chlorine dioxide, the ozone-activated carbon and the sodium hypochlorite are verified by various different inferior raw water tests, and all indexes are qualified, and the byproduct value is controlled to be low.
(4) The intelligent cloud platform can automatically adjust the adding amount of potassium permanganate, chlorine dioxide, ozone-activated carbon and sodium hypochlorite according to the online data feedback condition, and meets the automation requirement of a modern water plant;
(5) the method has wide application range, the used medicaments have mature use cases, the intelligent degree is high, the operation is simple, and the popularization is easy;
(6) the operation method is simple, low in cost, universal and easy for large-scale production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of a process of an intelligent cooperative disinfection method for complex surface water treatment according to an embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As introduced by the background art, the method aims at the problem that the composition of the surface water is complex and difficult to treat at present. Therefore, the invention provides an intelligent synergistic disinfection method suitable for complex surface water treatment, which comprises the following steps: potassium permanganate, chlorine dioxide, ozone-activated carbon and sodium hypochlorite are added into the raw water to intelligently and synergistically sterilize, so that the defect of insufficient capacity of a single disinfectant is overcome, the sterilization effect is enhanced, the production of byproducts is reduced, and the quality of effluent reaches the qualified requirement.
The invention relates to an intelligent synergistic disinfection method suitable for complex surface water treatment, which comprises the following steps:
potassium permanganate, chlorine dioxide, ozone-activated carbon and sodium hypochlorite are added into the raw water for intelligent synergistic disinfection, so that the defect of insufficient capacity of a single disinfectant is overcome, the risk resistance of water quality is greatly improved, the problem that byproducts are overproof due to excessive use of the single disinfectant is overcome, and the quality of the effluent is ensured to meet the qualified requirements.
Preferably, the intelligent synergistic disinfection method comprises the following steps of adding potassium permanganate, chlorine dioxide, ozone-activated carbon and sodium hypochlorite into the raw water: firstly, performing emergency treatment of potassium permanganate and adding chlorine dioxide for pre-oxidation treatment to remove algae, iron, manganese, chromaticity, smell, taste and the like in raw water, secondly, performing advanced treatment on a water body by using ozone-activated carbon, further performing oxidation and impurity adsorption on the water body to remove reducing substances in the water, and finally, performing main disinfection of a clean water tank by using sodium hypochlorite to ensure that the microbial indexes and residual chlorine indexes of the water from a factory are qualified.
Preferably, the amount of potassium permanganate added to raw water is 0.6-1.2 mg/L, the amount of chlorine dioxide added to raw water is 0.50-1.0 mg/L, the amount of ozone added to raw water is 1.0-2.5 mg/L, the amount of sodium hypochlorite added to raw water is 0.5-2.0 mg/L:
preferably, after the raw water is subjected to intelligent synergistic disinfection, the chromaticity is less than 5 degrees, no peculiar smell or odor exists, the iron content is less than 0.05mg/L, the manganese content is less than 0.02mg/L, the pH value is 7.5-8.1, the total number of bacteria is less than 1CFU/100mL, and escherichia coli is not detected.
Preferably, after the raw water is subjected to intelligent synergistic disinfection, the residual chlorine value is 0.30-1.50 mg/L, the chlorite concentration is less than 0.35mg/L, and the chlorate concentration is less than 0.15 mg/L.
The technical solution of the present application will be described below with specific examples.
Example 1:
the invention discloses an intelligent collaborative disinfection method suitable for complex surface water treatment, which comprises the following steps:
potassium permanganate, chlorine dioxide, ozone-activated carbon and sodium hypochlorite are added into the raw water, and intelligent synergistic disinfection is performed under the overall control of the smart cloud platform.
The principle of the treatment method is as follows: firstly, adding potassium permanganate for emergency treatment and adding chlorine dioxide for pre-oxidation treatment, removing algae, iron, manganese, chromaticity, smell, taste and the like in raw water, promoting flocculation, secondly, deeply treating a water body by using ozone-activated carbon, further oxidizing the water body and adsorbing impurities, removing reducing substances in the water, and finally, mainly disinfecting the clean water tank by using sodium hypochlorite to ensure that the microbial indexes and residual chlorine indexes of the water leaving the factory are qualified. The potassium permanganate, the chlorine dioxide, the ozone-activated carbon and the sodium hypochlorite are cooperatively used, so that various water quality problems can be simultaneously treated, the problem of insufficient capacity of a single disinfectant is solved, and the risk resistance of water quality is greatly improved; the problem of overproof by-products caused by excessive use of a single disinfectant is avoided, and the water quality safety is ensured; all the online detection data can be transmitted to the Huatt smart cloud platform, and the Huatt smart cloud platform carries out operation analysis, cooperative linkage and comprehensive regulation and control.
Taking a successful application of water plant (I) as an example, potassium permanganate emergency treatment and chlorine dioxide are used for preoxidation treatment on site, ozone-activated carbon is used for advanced treatment, a sodium hypochlorite disinfection combined process is adopted, intelligent synergistic disinfection is carried out in the water plant, and the water plant treatment process is shown in figure 1.
Adding design of potassium permanganate
The potassium permanganate is added by adopting a full-automatic potassium permanganate adding system, a water plant is matched with a full-automatic potassium permanganate adding device, the designed maximum adding amount is 1.2mg/L, the adding concentration is 2%, an adding point is arranged at the upstream position of a raw water inlet pipeline and is automatically added along with the water inlet flow under the control of a Huate intelligent cloud platform.
Chlorine dioxide adding design
The chlorine dioxide adding system is prepared on site by adopting a composite chlorine dioxide generator, the raw materials are hydrochloric acid and sodium chlorate, the designed maximum adding amount is 1.0mg/L (calculated by effective chlorine), and the chlorine dioxide adding system is controlled by a smart cloud platform to automatically add the chlorine dioxide along with the water inlet flow and the residual chlorine.
Ozone-active carbon treatment process
Ozone is prepared on site by adopting an oxygen source and ozone generator, an internal circulation water cooling mode is adopted, a microporous aeration disc is used for feeding ozone into an ozone contact tank, an ozone destructor is arranged at the top of the contact tank, the maximum feeding amount is designed to be 2.5mg/L, and the ozone is automatically fed along with the water inlet flow under the control of a Whatman intelligent cloud platform. Selecting granular activated carbon, adopting a turning plate filter tank in an activated carbon filter tank type, designing the empty bed filtering speed to be 10-11 m/h, the contact time to be 10-11 min and the thickness of the activated carbon layer to be 2 m. In order to prevent the dropped biological film from influencing the effluent quality, quartz sand (with the effective grain diameter of 0.6-1.2mm) with the thickness of 30cm is paved below the activated carbon layer, and the total thickness of the filtering layer is 2.3 m.
Sodium hypochlorite solution adding design
The sodium hypochlorite is electrolyzed on site by a sodium hypochlorite generator to prepare 0.8% sodium hypochlorite solution, the solution is stored in a deep-color sodium hypochlorite storage tank, in order to ensure the adding precision, the maximum adding amount is designed to be 2.0mg/L (calculated by effective chlorine) under the control of a Whiter smart cloud platform along with the water inlet flow and the residual chlorine, the adding point is arranged on a water inlet pipeline of a clean water tank, and water is supplied to the outside after the water quality is qualified after disinfection.
The operation effect is as follows: the average adding amount of potassium permanganate is 0.8mg/L, the average adding amount of chlorine dioxide is 0.8mg/L, the average adding amount of ozone is 1.9mg/L, and the average adding amount of sodium hypochlorite is 1.3 mg/L. The water plant is cooperatively controlled by the smart cloud platform in the Huate, so that full-automatic operation is realized, and the adding amount is automatically adjusted along with online detection data. Since the operation, the highest chroma of the factory water of the water plant is 4 degrees, the highest iron content is 0.04mg/L, the highest manganese content is 0.01mg/L, the total number of bacteria is less than 1CFU/100mL, escherichia coli is not detected, and the water has no peculiar smell or peculiar smell. Residual chlorine value is 0.5-0.6mg/L, chlorite content is 0.34mg/L at most, and chlorate content is 0.14mg/L at most. The related indexes in the factory water completely meet the requirements of sanitary Standard for Drinking Water (GB5749-2006) issued by the Ministry of health.
The water quality before and after the treatment is shown in Table 1.
TABLE 1 Water quality before and after treatment in a successful Water works
Example 2:
taking a successful application of the water plant (II) as an example, the potassium permanganate emergency treatment and chlorine dioxide are used for preoxidation treatment on site, ozone-activated carbon is used for advanced treatment, a sodium hypochlorite disinfection combined process is adopted, intelligent synergistic disinfection is carried out in the water plant, and the water plant treatment process is shown in figure 1.
Adding design of potassium permanganate
The potassium permanganate is added by adopting a full-automatic potassium permanganate adding system, a water plant is matched with a full-automatic potassium permanganate adding device, the designed maximum adding amount is 1.2mg/L, the adding concentration is 2%, an adding point is arranged at the upstream position of a raw water inlet pipeline and is automatically added along with the water inlet flow under the control of a Huate intelligent cloud platform.
Chlorine dioxide adding design
The chlorine dioxide adding system is prepared on site by adopting a composite chlorine dioxide generator, the raw materials are hydrochloric acid and sodium chlorate, the designed maximum adding amount is 1.0mg/L (calculated by effective chlorine), and the chlorine dioxide adding system is controlled by a smart cloud platform to automatically add the chlorine dioxide along with the water inlet flow and the residual chlorine.
Ozone-active carbon treatment process
Ozone is prepared on site by adopting an oxygen source and ozone generator, an internal circulation water cooling mode is adopted, a microporous aeration disc is used for feeding ozone into an ozone contact tank, an ozone destructor is arranged at the top of the contact tank, the maximum feeding amount is designed to be 2.5mg/L, and the ozone is automatically fed along with the water inlet flow under the control of a Whatman intelligent cloud platform. Selecting granular activated carbon, adopting a turning plate filter tank in an activated carbon filter tank type, designing the empty bed filtering speed to be 10-11 m/h, the contact time to be 10-11 min and the thickness of the activated carbon layer to be 2 m. In order to prevent the dropped biological film from influencing the effluent quality, quartz sand (with the effective grain diameter of 0.6-1.2mm) with the thickness of 30cm is paved below the activated carbon layer, and the total thickness of the filtering layer is 2.3 m.
Sodium hypochlorite solution adding design
The sodium hypochlorite is electrolyzed on site by a sodium hypochlorite generator to prepare 0.8% sodium hypochlorite solution, the solution is stored in a deep-color sodium hypochlorite storage tank, in order to ensure the adding precision, the maximum adding amount is designed to be 2.0mg/L (calculated by effective chlorine) under the control of a Whiter smart cloud platform along with the water inlet flow and the residual chlorine, the adding point is arranged on a water inlet pipeline of a clean water tank, and water is supplied to the outside after the water quality is qualified after disinfection.
The operation effect is as follows: the average adding amount of potassium permanganate is 1.0mg/L, the average adding amount of chlorine dioxide is 0.6mg/L, the average adding amount of ozone is 2.5mg/L, and the average adding amount of sodium hypochlorite is 1.2 mg/L. The water plant is cooperatively controlled by the smart cloud platform in the Huate, so that full-automatic operation is realized, and the adding amount is automatically adjusted along with online detection data.
The water quality before and after the treatment is shown in Table 2.
TABLE 2 Water quality before and after treatment in a successful Water works
Example 3:
taking a successful application of water plant (III) as an example, potassium permanganate emergency treatment and chlorine dioxide are used for preoxidation treatment on site, ozone-activated carbon is used for advanced treatment, a sodium hypochlorite disinfection combined process is adopted, intelligent synergistic disinfection is carried out in the water plant, and the water plant treatment process is shown in figure 1.
Adding design of potassium permanganate
The potassium permanganate is added by adopting a full-automatic potassium permanganate adding system, a water plant is matched with a full-automatic potassium permanganate adding device, the designed maximum adding amount is 1.2mg/L, the adding concentration is 2%, an adding point is arranged at the upstream position of a raw water inlet pipeline and is automatically added along with the water inlet flow under the control of a Huate intelligent cloud platform.
Chlorine dioxide adding design
The chlorine dioxide adding system is prepared on site by adopting a composite chlorine dioxide generator, the raw materials are hydrochloric acid and sodium chlorate, the designed maximum adding amount is 1.0mg/L (calculated by effective chlorine), and the chlorine dioxide adding system is controlled by a smart cloud platform to automatically add the chlorine dioxide along with the water inlet flow and the residual chlorine.
Ozone-active carbon treatment process
Ozone is prepared on site by adopting an oxygen source and ozone generator, an internal circulation water cooling mode is adopted, a microporous aeration disc is used for feeding ozone into an ozone contact tank, an ozone destructor is arranged at the top of the contact tank, the maximum feeding amount is designed to be 2.5mg/L, and the ozone is automatically fed along with the water inlet flow under the control of a Whatman intelligent cloud platform. Selecting granular activated carbon, adopting a turning plate filter tank in an activated carbon filter tank type, designing the empty bed filtering speed to be 10-11 m/h, the contact time to be 10-11 min and the thickness of the activated carbon layer to be 2 m. In order to prevent the dropped biological film from influencing the effluent quality, quartz sand (with the effective grain diameter of 0.6-1.2mm) with the thickness of 30cm is paved below the activated carbon layer, and the total thickness of the filtering layer is 2.3 m.
Sodium hypochlorite solution adding design
The sodium hypochlorite is electrolyzed on site by a sodium hypochlorite generator to prepare 0.8% sodium hypochlorite solution, the solution is stored in a deep-color sodium hypochlorite storage tank, in order to ensure the adding precision, the maximum adding amount is designed to be 2.0mg/L (calculated by effective chlorine) under the control of a Whiter smart cloud platform along with the water inlet flow and the residual chlorine, the adding point is arranged on a water inlet pipeline of a clean water tank, and water is supplied to the outside after the water quality is qualified after disinfection.
The operation effect is as follows: the average adding amount of potassium permanganate is 0.6mg/L, the average adding amount of chlorine dioxide is 0.9mg/L, the average adding amount of ozone is 1.2mg/L, and the average adding amount of sodium hypochlorite is 1.8 mg/L. The water plant is cooperatively controlled by the smart cloud platform in the Huate, so that full-automatic operation is realized, and the adding amount is automatically adjusted along with online detection data.
The water quality before and after the treatment is shown in Table 3.
TABLE 3 Water quality before and after treatment in a successful Water works (III)
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An intelligent cooperative disinfection method for complex surface water treatment is characterized by comprising the following steps:
adding potassium permanganate into raw water for emergency addition and chlorine dioxide for pre-oxidation treatment, flocculation, precipitation and filtration;
carrying out advanced treatment on the water body by using ozone-activated carbon;
and (3) disinfecting the water body by adopting sodium hypochlorite to obtain the water purifying agent.
2. The intelligent and synergistic disinfection method for complex surface water treatment as claimed in claim 1, wherein the potassium permanganate is added in an amount of 0.6-1.2 mg/L, based on the raw water.
3. The intelligent and synergistic disinfection method for the treatment of complex surface water as claimed in claim 1, wherein said chlorine dioxide is added to raw water in an amount of 0.50-1.0 mg/L, based on the raw water.
4. The intelligent and synergistic disinfection method for treatment of complex surface water as claimed in claim 1, wherein said ozone is added to raw water in an amount of 1.0-2.5 mg/L based on raw water.
5. The intelligent and synergistic disinfection method for treatment of complex surface water as claimed in claim 1, wherein said sodium hypochlorite is added to raw water in an amount of 0.5-2.0 mg/L, based on the raw water.
6. The intelligent and synergistic disinfection method for the treatment of complex surface water as claimed in claim 1, wherein the potassium permanganate addition point is located at the upstream position of the raw water inlet pipeline.
7. The intelligent and synergistic disinfection method for the treatment of complex surface water as claimed in claim 1, wherein said chlorine dioxide dosing point is located at a position downstream of the raw water inlet pipe.
8. The intelligent synergistic disinfection method of complex surface water treatment of claim 1, wherein the ozone is dosed into the ozone contact tank using a micro-porous aeration tray.
9. The intelligent and cooperative disinfection method for treatment of complex surface water as claimed in claim 1, wherein said sodium hypochlorite adding point is disposed in the water inlet pipe of the clean water tank.
10. The water treated by the method of any one of claims 1 to 9, wherein the treated water has a color intensity of less than 5 degrees, no off-odor or off-flavor, an iron content of less than 0.05mg/L, a manganese content of less than 0.02mg/L, a pH of 7.5 to 8.1, a total number of bacteria of less than 1CFU/100mL, and no coliform bacteria detected; residual chlorine value is 0.30-1.50 mg/L, chlorite concentration is less than 0.35mg/L, and chlorate concentration is less than 0.15 mg/L.
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