Sewage treatment equipment to remove organic pollutants and ammonia nitrogen depends on the device AO biological treatment process. Which works at A-level, due to the high concentration of organic wastewater, microorganisms in a hypoxic state sewage treatment plant, micro-organisms and micro-organisms at this time, so the A pool only has a certain level of organics removal function, reduce the subsequent aerobic pool organic load, reducing the concentration of organic matter, but there is still a certain amount of organic matter and high NH3-N exists. In order to further oxidation and decomposition of organic matter, while at carbonization nitrification can proceed smoothly, set a lower organic load of aerobic biological contact oxidation pond at O ??level. O level in the main pool for aerobic microorganisms and bacteria from oxygen (denitrifying bacteria). Which aerobic microorganisms to decompose organic matter into C02 and H20; autotrophic bacteria (denitrifying bacteria) the use of organic matter decomposition of inorganic carbon or C02 in the air as a nutrient source, sewage NH3-N is converted to NO-2-N . NO-3-N sewage rates, 0 pool water back to the A-level sewage tank manufacturers, provide sewage electron acceptor for the A-level pool, denitrification by the eventual elimination of nitrogen pollution. Guangzhou-Foshan, Shunde Xingtan students environmental municipal wastewater treatment works (36000m3 / d): sewage containing inorganic substances, such as cellulose, starch, fat, protein and synthetic detergent; also often contain pathogenic bacteria, viruses and parasites eggs; and the suspended or dissolved organic matter, such as chlorides, sulfates, phosphates, bicarbonates, and metal salts such as sodium, potassium, calcium, magnesium, trace metals such as zinc, copper, chromium, manganese, nickel and lead. Sewage suspended solids content is generally between 200-400mg / L, BOD5 between 100-7000mg / L (clean water than 10mg / L indicates that the water has been polluted seriously. Sewage case, rich students (already certification), Qingyuan sewage provided by the Environmental Protection Engineering Co., Ltd. Guangzhou Fu students. Guangzhou Fu students Environmental Engineering Co., Ltd. (www.fushengyuan.com) is the leader in Guangzhou, environmental monitoring equipment, over the years, the company is implementing the scientific management, innovation development, the principle of honesty and trustworthiness, and satisfy customer needs. In the rich students leadership with the staff warmly welcome all inquiries negotiations to create a better future for rich students.