Raw oyster shells as carrier for nitrifying biofilm in aerated biofilter
Oyster shell wastes resulted from the mariculture presents an imperative disposal problem in the coastal region. In this study, the nitrification efficiency on an aerated biofilter with raw oyster shells (ROS) as the sole buffer agent and the biomass carrier was evaluated. The capability of alkalinity supplied by ROS was found to be about 1050 mg/L, enabling a loading ammonia concentration up to 147 mg/L being removed. A substantial NH4+-N removal of 65% could be achieved even at the loading concentration as high as 240 mg·L-1. About 100% nitrification was maintained as the influent NH4+-N concentration kept below 120 mg/L. The nitrification kinetics of biofilm with ROS fit well to Monod kinetics equation. The saturation constant Km was 625 mg/L for the nitrifier with ROS, about one order of magnitude higher than that for compared plastic ball (PLB) carrier system.
Lu Min Ouyang Tong Ye Zhilong Liu Yaoxing
Department of Environmental Science and Technology, Xiamen University, Xiamen 361005, P.R.China Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, P.R.China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）