Domestic and municipal sewage treatment plant development survey: urban sewage treatment since the industrial revolution 200 years ago, more and more people's attention. Urban sewage treatment rate has become an important symbol of civilization of a region or not. Nearly 200 years, the urban sewage treatment from natural raw deal, simply to take advantage of a deal with the development of advanced surgery, advanced treatment of wastewater and reuse. Treatment process from conventional activated sludge process, oxidation ditch process development to A / O, A2 / O, AB, SBR (including CCAS technology) and other technology, to achieve different water requirements. China's urban sewage treatment relative to developed countries, a late start, the current urban sewage treatment rate of only 6.7%. While we strongly cause foreign advanced technology, equipment and experience, must be combined with China's development, especially in local conditions, to explore suitable for China's actual urban sewage treatment system. 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 chemical sewage treatment, nitrification bacteria will NH4 + -N oxidized NHx - N slaughter waste water processing method, all need oxygen, DO should be controlled at 2mg / L or more. DO change can significantly affect the system and the amount of denitrifying bacteria indicative of changes in the number of microorganisms. When a mixture of low DO concentrations new sewage treatment methods, indicative of microbial nitrification process of a small number of poor nitrification nitrogen; on the contrary sewage treatment methods, indicates that microbial quantity, nitrification rate of nitrogen also will increase . 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 sewage treatment abroad |. Huizhou sewage treatment | 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!