Circulating Biological Fluidized Bed Processing. Inside Of N, P Wastewater

In recent years,with the development of industry and agriculture and improvement of people's living standard, chemical fertilizer, pesticide and use of different chemical materials. A large amount of municipal sewage enriched with nutriment such as nitrogen phosphorus, the waste water of industry and agriculture flows into the natural water areas, cause the eutrophication of water body. The eutrophication of water body will destroy the equilibrium of ecosystem of water . Endanger human health, reduce the economic worth of the water body, crisis of aggravation water resource .So try, reduce waste water nitrogen content of phosphorus waste water treatment focus and difficult point of field.This text has introduced the research current situation at home and abroad of the biological fluid bed.It is analyzed that the biological denitrification gets rid of the principle of the phosphorus, select to use fly ash as the carriers circulating the biological fluid bed inside, Have probed into the tolerance of exposing to the sun, entered water density of organic matter, impact on N,P waste water treatment efficiency of residence time of average water conservancy, have made the good sewage purification result through the test.The experimental result shows : fly ash can as biomembrane carrier, with arrange mud law can circulate biological fluid bed start, succeed in make, fast. Through stop , - expose to the sun - park circulate expose to the sun angry way come, controlled dissolve the density of oxygen, help this process system to achieve the goal of getting rid of phosphorus in denitrification at the same time. Entering organic matter of water within the specific limits, while rising suddenly or dropping suddenly, there is no obvious change to the removal rate of COD in the reactor, Maintain at removal of COD rate above 83% , prove fluid bed system have very strong bearing the ability that load assaults, As expose to the sun tolerance 40 L/h, expose to the sun angry time interval 10min, average water conservancy residence time at the 4h, surfaces steadily, on terms that active mud load has already obviously gone beyond the living beings...