Application Of Hydrolysis Acidification-the Apward Biological Aerated Filters In Sewage Treatment

With the widely spread of reforming and opening and the increase of the living standard, urban construction and each social enterprise has rapidly expanded in our country. In Daqing city, construction infrastructure transformation, the economic development zone construction, residential district's development and the construction implementation of large-scale business project increases the volume of sanitary sewage discharge year by year. If the sewage cannot be treated effectively, it will make enormous bad influence on downstream cities' environment as well as Daqing,simultaneously seriously hindering Daqing's economic development and the urban sustainable development.Nowadays, the living sewage of Daqing Tiexi residential district, Huizhan avenue business district, the friendship area, Tierener village, Ben two, Ben three, Qianlonggang areas, fuel company and mine shaft granulated sour factory, most of that goes into the Chen family yard pond, then drains into the Songhua River without any treatment. It has intensified the water body pollution, destructing the ecological environment, and affecting the water quality and the coast people's health enormously. The sewage, being dispersed into the water body without any processing,will cause the pollutant concentration to surpass water body's background content of the substance and automatic depuration ability, then incurs the changs of water body in physics, chemistry, biology and radioactivity characteristic, worsening the water quality and the ecological environment. The sanitary sewage of the Chen family yard pond has not been treated,so BOD5, CODcr, SS and some other item of pollutant content is higher than the national water standard(Ⅲ). There is no doubt it has made very tremendous negative influence on the Songhua River water body ecological environment and downstream section's water. Therefore the sewage treatment plant of the Chen family yard pond should be constructed and operated steadily as soon as possible.According to the domestic and foreign sewage treatment technological progress and Daqing sewage treatment process's Characteristics, by contrasting three biological treatment processes,this paper detemines the hydrolisis-on counter current aeration biofilter process (the hydrolisis-postpositioned denitrification BAF method) as the sewage treatment process of this factory. And the central area sewage treatment plant's autonomous system plan and the water quality parameters of the Sewage treatment plant are also introduced. The water quality target has reached "Cities Sewage treatment plant pollutant discharge Standard" (GB19818-2002) first-level A standard, it proved that the process used in this factory can be applied in Daqing area's sewage treatment.