Study On Wastewater Of Biologist Nitogen And Phoshphoras Removal Technology

Wastewater of biologist nitogen and phoshphoras removal technology ,as an economical and valid way of control wastewater N and P pollution, has been appreciated by profession of envirormental protection and water and waste .This article inquire technology of biologist N and P removal and other method of N and P removal research new technology of N and P in SBR and the continuous flow intermitteat aeration .work done in this thesis can be conclude as follow :l.SBR for treating wastewater were obtained by a bench-scale experiment. this paper adopt the best running 4way SBR parameters :anaerobic(2h), aeration(Sh), anoxic(2.5h), precipitate, discharge of mud , Water elimination(1.5h), run lenth were 11.0 hours.efflunt water NH3-N were 1.61mg.L-1, TN were9.61mg.L' ,TP were 0.43 mg.L-1, NH3-N were removal 96.02%, TN were removal 76.62.% .with TP were remova 91.45%. reach first disharge standard of" integrated wastewater disharge standard".2.Researched on new technology of N and P removal through the continuous flow intermitteat aeration .don't set up special anoxic-anaerobic tank , water enter the same reactor tank continuously ,intermitteat aerating . at the same reactor tank, nitrification, and denitrification; release P, absorb P. comparing and optimizing from three side: selecting best aerational pattern, carbon sources, mixing . stable COD and NH3-N removal efficiencies were realized in experiments.efflunt water TN were 13.02mg.L-1' ,TP were 0.48mg.L-1, with TN removal 79.37% .with TP removal 92.30%. reach first disharge standard of " integrated wastewater disharge standard".3.Control quantity of nitrate and VFA in the anaerobic zone , there are polyphosphobacteria grow and reproduction's two importan factors, increasecarbon sources and mixing to ensure denitrificotion ongoing completely, nitrate concentration reduce VFA increase.control condition so that system is in anaerobic state .can make polyphosphobacteria realease P completely in anaerobic stage and absorb P access in aerobic stage, with TP removal 92.30 %.4. An producted experiment has been conducted on a full scale activated sludge process with capacity of 20 thousand cubic meters per day operating under status of continuous flow and intermittent aeration aeration .The results have shown that meanwhile with normal COD removal, 77.70% of total N and 90.78% of total P was removed.