Integrated biochemical treatment plant for the sewage rich in organic impurities, sulfuretted hydrogen and hydrosulfides, ammonia nitrogen

摘要

The invention relates to the purification of domestic and industrial waste water. The apparatus for thorough biochemical purification of waste water comprises mechanical purification apparatuses, anaerobic bioreactors, waste water and sludge mixing chambers with circulation pumps and combined biological purification devices. The combined biological purification devices comprise biofilters with artificial loading, irrigation systems, collecting trays and drains. Aeration columns which are deepened into aeration zones of settling aeration tanks are coupled to the drains. A waste water supply pipeline is coupled to the mixing chambers of the combined biological purification devices. A delivery pipeline of the circulation pump which is mounted in the mixing chamber of the first combined device is coupled to the irrigation system as well as to the mixing chamber of the second combined device. The delivery pipeline of the circulation pump which is mounted in the mixing chamber of the second combined device is coupled to the irrigation system, to the mixing chamber of the first combined device and to a waste sludge treatment device. The invention ensures an efficient and stable quality of the purification of waste water with a high content of organic contaminants, hydrogen sulphide, hydrosulphides and ammonium nitrate and makes it possible to increase the ecological safety.