Impact of changing aerobic and anaerobic environments on treatment of domestic sewage by river sand
The removal of organic matter and ammoniac nitrogen from sewage was studied using an indoor simulation soil-column experiment that takes advantage of intermittent flooding and drying as a mechanism. We studied the transformations of, and impacts on organic matter and ammoniac nitrogen under the cyclic aerobic and anaerobic environments which develop in river sands. The results show that the soil-column environment alternates between aerobic and anaerobic conditions in turn from top to bottom, and decreasing concentrations of organic matter and ammoniac nitrogen can be described as step function. The portion of the column containing river sand is the main place where organic matter and ammoniac nitrogen is degraded, largely due to the cyclic aerobic and anaerobic environment caused when wastewater was poured into the soil-column intermittently. The distribution of aerobic and anaerobic environments is constantly changing as wastewater fills and then drains from the soil-column in wet-dry cycles.
J.He T.Ma X.Gao
Biogeology and Environmental Geology Laboratory of Ministry of Education & Sino-Hungary Joint Laboratory of Environmental Sciences and Health, China University of Geosciences, Wuhan, P.R.China
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
1559-1562
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）