Industrial wastewater pollutants composition and nature of urban sewage significant differences compared to the wastewater treatment works, and has the following salient features: ① pollutants are complicated, big difference. Living in different cities and regions pollutants in sewage composition and properties similar to, but industrial waste between different industries, there are significant differences in their composition and properties. Of particular note is that the wastewater in the same industry, between different enterprises, its composition varies widely. Even the same company or factory, wastewater components of different production processes there is a big difference between asking. In many cases, the same production process, at different times or in different operating conditions, the water component will change a lot. As a dyeing wastewater generated in the 1d will be showing a variety of colors, which leads to bad management practices dyeing wastewater treatment plant effluent color also often change. ② wide range of concentrations of pollutants, volatile. Industrial wastewater pollutant concentrations wide distribution range of a few low-mg / L, will amount to hundreds of thousands of high mg / L, with a mass concentration of the wastewater varies with time of great magnitude, which gives Process Design and the daily operation and management brought the difficulty, but also the protection of the treated water quality and stability challenges. ③ biodegradable and toxic pollutant types, large concentrations. Difficult biological wastewater often contains higher concentrations of many species or degradation of organic pollutants, toxic substances, the use of a single technology is difficult to guarantee the principle of treated water, often requires a variety of technical principles and processing units combined to form than the municipal sewage more complex processes. ④ processing target diverse, large differences in water quality standards. Post-industrial wastewater treatment and reuse or discharge pathways, namely the fate of effluent diverse, including internal process reuse, miscellaneous plant, between plants reuse, recycling area, the municipal pipe network emissions and direct emissions. Whereabouts is different, different quality requirements, the treatment process selection and processing goals are different. There are also the dangers of wastewater treatment and wastewater ease of starting, the major pollutants in wastewater classified into three categories: The first category is the waste heat from the cooling water main food plant wastewater treatment, cooling water can be reused; second class conventional pollutants, i.e., no significant toxicity and easy biodegradable material chemical wastewater treatment, including biodegradable organic matter, can be used as the compound of biological nutrients and suspended solids; the third category is the toxic pollutants, i.e. containing toxic and not readily biodegradable substances, including heavy metals, toxic compounds, and is not easily biodegradable organic compounds. In fact, an industrial can be discharged in several different types of wastewater wastewater treatment, and a waste water and there will be different in different pollutants and pollution effects. Such as a dye factory both acidic waste water discharge, and alkaline wastewater discharged. Textile printing and dyeing wastewater, due to the different fabrics and dyes, which are very different pollutants and pollution effects will be. Even a production plant effluents, and may also contain several contaminants. Oil refinery overhead vapor such as distillation, cracking, coking, and other devices overlap condensed water containing phenol, oil sulfides. In different industrial enterprises, although products, raw materials and processing different, it may discharge wastewater similar nature. Such as oil refineries, chemical plants and coke gasworks, may have oil, phenol wastewater discharge. Luliang chemical wastewater treatment wastewater treatment _ _ Run-Run-environmental provided by the Shanxi Environmental Protection Engineering Co., Ltd .. Run-Environmental Engineering Co., Ltd., Shanxi (www.sxruntong.com) strong, credible, in Taiyuan, Shanxi sewage treatment equipment industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement through innovative ideas will lead Run into the brilliant green and you work for a better future!