City landfill leachate treatment has been a landfill design, operation and management of a very difficult problem. Leachate is the liquid product of wastewater treatment in landfill gravity flow, mainly from precipitation and garbage itself contains water. Because there are many factors that could affect the liquid nature of leachate, including physical factors, chemical factors and biological factors such as piggery wastewater treatment in the flow process, so changes in the nature of leachate within a fairly wide range. In general, the pH value between 4 ~ 9, COD 2000 ~ 62000mg L within the range of leather wastewater treatment / in, BOD5 from 60 ~ 45000mg / L, the concentration of heavy metals and heavy metal concentrations in municipal wastewater are basically the same. Municipal Landfill Leachate is a component of a complex of high concentration organic wastewater, if left untreated, directly into the environment, it will cause serious environmental pollution. To protect the environment for the purpose of leachate treatment is essential. Sewage treatment nitrification and denitrification process factors: biological nitrogen removal in wastewater treatment, the denitrifying bacteria, denitrifying bacteria play an important role in the biodegradation process for these bacteria have certain environmental conditions: 1) DO: sewage hypoxia-treated structures, optimal DO denitrification of 0.5mg / L or less, in the aerobic structures in aerobic metabolism of organic matter, nitrification bacteria will NH4 + -N oxidized NHx - N, need oxygen, DO should be controlled at 2mg / L or more. DO change clinic wastewater treatment method, the system can significantly affect the amount of denitrifying bacteria and microorganisms indicative number of changes. When a mixture of low DO concentrations, indicative of microbial nitrification process of a small number of nitrification poor; on the contrary, it is indicative of microbial quantity, nitrification rate of nitrogen increases. However, due to the high concentration of dissolved oxygen on nitrification bacteria have a certain extent, so DO control in general greater than 2mg / L conditions of low appropriate. Above picture is for reference only, please consult our detailed models, more models, please visit our official website or call us for dyeing wastewater treatment, waste water treatment Xin'an, environmental protection provided by Luoyang Luoyang Yu Quan Yu Quan sewage treatment Limited. Luoyang Yu Quan Sewage Treatment Co., Ltd. (www.yuquankj.net) strong, credible, in Luoyang, Henan sewage treatment equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Luoyang Yu Quan into the brilliant green and you work for a better future!