Study And Comparision On The Treatment And Reuse Of Municipal Wastewater By Means Of AOPs+BAF Technology

With the rapid development in our society, people need more and more water resource. However, the present situation in our country is: the gross amount of water resource is rich, but o it is scare if based on the water own by per person, and the pollution is serious. Because the shortage of uncontaminated water resource, waste water resource has created a sensation as a new resource. But conventional advanced wastewater treatment can not satisfy the demand of reclamation for the complexity of the raw water quantity. AOPs technique has evolved as a hotspot of a new advanced wastewater treatment. We also have an extensive regard for BAF because of its high efficiency and technology characteristics.The experiment takes secondary effluent of municipal sewage plant as raw water, and contrasts processing capacity between solitude ozone and AOPs(catalysis ozonization). The ozone concentration in water of catalysis ozonization is higher and more steady than solitude ozone. So it is propitious to oxidative degradation of pollution. And the removal of UV₂₅₄ is higher than the removal of COD_Mn. Considering of economic factor, the practical operation can't use large quantities of ozone. So we mainly take care of the situation of lower content(lower than 10mg/L). The purpose of catalysis ozonization is not for organic substance removal ratio but for the improvement of water quality and the transformation of the pollution's configuration. This can help for the latter strengthen biologic treatment.This article contrasts three kinds of BAF treatment technologies, which are monomer BAF, pure oxygen BAF, and coagulating sedimentation BAF through pilot-scale experiment. Monomer BAF has poor removal ratio and can not bear shock loading. It can't satisfy the reclamation demand. Pure oxygen BAF is fit for the growth of biomass because of the high oxygen content. The raw water has low COD but high ammonia nitrogen. So the dominant species is nitrobacteria in carbon column, and this technology has high ammonia nitrogen removal, but has not distinct organic matter removal and the removal COD_Mn ratio is closed to monomer BAF. In the coagulation+BAF, the coagulation can remove organic...