Food and beverage industry wastewater treatment involves starch, sugar, beverages, canned food, meat, aquatic products, wine, rice products, dairy products, soy products, fermented spices and other major industries.The main features of food and beverage wastewater:1. Wastewater quality and quantity of water changes with the seasons2. Biodegradable ingredients are more natural organic substances, non-toxic substances, good biodegradability3. Wastewater contains a variety of microorganisms, including pathogenic microorganisms, perishable sewage stink4. High concentrations of waste water5. Wastewater nitrogen, phosphorus content is more highThe main sources of food and beverage wastewater and pollutants:Material cleaning section: sand debris, leaves, skin, scales, meat, feathers and other suspended impuritiesProduction section: organic matterForming section: food additives and other chemical ingredients

Machined a variety of metal products discharged from the waste and flushing wastewater, but also contains a variety of metal ions such as chromium, zinc and cyanide, etc. They are highly toxic. Electroplating wastewater involves a wide range, and pollution, is one of the key control of industrial wastewater.Machining process has coolant, organic cleaning fluid, spray paint wastewater, spark discharge and other wastewater. Although the amount of these wastewater is very small but the concentration of organic matter is very high, the CODCr of the coolant is as high as 50000 ~ 300000mg / L, and the direct discharge without treatment will cause serious pollution to the environment. There are bottlenecks in the domestic treatment of high-concentration wastewater for mechanical processing, and many combined treatment processes can successfully reduce its CODCr to thousands of mg / L, but it is very difficult to further improve the treatment efficiency. China's high concentration of mechanical processing emissions, emulsified oil wastewater has not been well handled. The main reason is that with the continuous improvement of technology, the stability of emulsion is getting higher and higher, demulsification is becoming more and more difficult. The composition of such wastewater is complex, with poor biodegradability and certain toxicity. The main treatment of such waste using physical and chemical methods, such as chemical oxidation and decomposition, pharmaceutical electrolysis, activated carbon adsorption and reverse osmosis and other processing techniques.Widely used at home and abroad efficient machining. The method has the advantages of low cost, simple processing technique and equipment, convenient operation, small equipment maintenance, low energy consumption, stable operation and treatment effect, good decoloring effect, thorough decomposition of organic matters, Emulsion treatment are all applicable to the advantages of being widely used. The project uses Fenton reagent chemical oxidation decomposition of waste emulsion (waste coolant and other wastewater).All kinds of wastewater are dispersed systems with water as the dispersion medium. According to different disperse phase particle size, the wastewater can be divided into two categories: dispersed phase particle size of 0.1 ~ 1nm called the true solution; dispersed phase particle size between 1 ~ 100nm called colloidal solution; dispersed phase particle size greater than 100nm known as the suspension . Wherein the particle size of 100 μ m or more of the suspension can be precipitated or filtered, and the particle size in the range of 1nm ~ 100μ m partial suspension and colloidal solution can be coagulation treatment.

Pure water after use changed the original physical or chemical properties, has become a waste water containing different types of impurities. Chemical wastewater is the process waste water, cooling water, exhaust gas washing water, equipment and site flushing water discharged from chemical production. If these wastewater is discharged without treatment, it will cause different types of water bodies and different levels of pollution, thus endangering human health and affecting industrial and agricultural production.

River siltation has increasingly affected flood control, drainage, irrigation, water supply, navigation and other functions of the normal play, in order to restore the normal function of the river to promote rapid economic and social development, the river dredging dredging project. By deepening and widening the watercourse through the river, the river became clear, the production conditions and living conditions of the masses have been significantly improved, and the target of "water clear, river smooth, shore green and beautiful scenery" has been achieved.

Textile printing and dyeing wastewater is mainly raw materials, cooking, rinsing, bleaching, sizing and other processes generated by the natural impurities, fat and starch and other organic wastewater. Printing and dyeing wastewater is produced in many processes such as dyeing, printing and sizing, and contains a large amount of organic substances such as dyes, starch, cellulose, lignin and detergents, as well as inorganic substances such as alkali, sulfide and various salts, Very strong.The main source of textile printing and dyeing industrial wastewater is printing and dyeing wastewater. Printing and dyeing wastewater is the waste water discharged from the printing and dyeing factory that mainly processes cotton, hemp, chemical fiber and blended products.Wastewater contains: dyes, slurries, additives, oil agents, acid and alkali, fiber impurities, sand substances, inorganic salts, the water quality characteristics are mainly COD and BOD high, and the resulting chroma and other indicators far Exceed the emission standards, is recognized as one of the most difficult to control the major hazardous waste water.

polycrystalline silicon and polycrystalline wastewater