Nantong Sewage pH Value Online Monitoring System

Process characteristics:

1. The water quality and volume of industrial sewage fluctuate greatly with a wide range of changes.

2. The change law of water volume of industrial sewage is different from that of domestic sewage, with characteristics such as random intermittency and uncertainty.

3. The pollutant concentration of industrial sewage is relatively high, generally with a CODcr value above 2000 mg/L.

4. Industrial wastewater has complex and diverse components and high content, such as phenolic compounds (benzene series, heavy metal ions and other toxic substances, pathogens, etc.).

5. The wastewater contains refractory organic matter and nutrients such as phosphorus;

6. The wastewater often contains radioactive substances;

7. The wastewater treatment is difficult;

8. Great impact on the environment: Due to the high concentration of discharged pollutants or special properties (such as cyanide-containing wastewater), it will cause pollution and harm to the surrounding environment.

9. The sewage must be disinfected before discharge or reuse.

Application fields of industrial sewage treatment equipment

1. Printing and dyeing industry: The production wastewater discharged by printing and dyeing factories mainly contains dyes, acids, bases and various auxiliaries. If discharged directly without treatment, it will cause serious pollution to water bodies and even destroy the ecological environment.

2. Paper industry: The production wastewater discharged by paper mills is mainly composed of bleaching cooking waste liquid, pulp washing drainage, partial cooking waste liquid and machining white water flushing water, etc. This type of wastewater has high and relatively stable fiber suspended matter content. 3. Food and beverage processing industry: The production wastewater discharged by food processing plants mainly includes slaughterhouse sewage, ground flushing water of meat processing plants and cleaning water after slaughter. The ground flushing water of meat processing plants accounts for about 60% of the total discharge. 4. Sugar and paper industry: The ferrous sulfate solution produced by the soda ash method for production discharged from sugar factories is commonly known as green vitriol, which is a colloidal precipitate of solid iron hydroxide. 5. Chemical and pharmaceutical industry: The production process of various organic chemicals discharged by chemical plants cannot do without the participation of chemical raw materials and chemical products to generate intermediate products or final products. At the same time, a large amount of heat is released, which keeps the temperature rising until the reaction reaches equilibrium. After cooling down in the chemical reactor, solid crystalline salts are precipitated to obtain the finished product. Therefore, a large amount of hot steam is generated in chemical and pharmaceutical enterprises, and this heat needs to be dissipated by cooling devices. 6. Metallurgical and iron and steel smelting industry: Various acids are used as catalysts in the metal smelting process to participate in redox reactions to generate metal oxides and various salts, and a large amount of heat is released. Therefore, the high-temperature furnace exhaust gas in metallurgical and iron and steel smelting enterprises is also one of the important pollution sources. 7. Textile, printing and dyeing, leather and fur processing industry: The production process of textile, clothing, leather and fur processing industry will produce a large amount of dust, fiber scraps, leather scraps, cloth scraps, fluff, cloth dust, sand and other substances. If discharged arbitrarily without treatment, it will seriously pollute the air and affect human health. 8. Municipal engineering: Domestic sewage in residential communities is generally collected by a centralized collection system for treatment, and then discharged into the urban pipe network after reaching the standard.

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