好気性ろ床における処理機構のモデル化に関する研究

抄録

A kinetic model of an aerated filter is developed. The aerated filter has the combined functions of biofilm reactor for biodegradation of organic matter and filter for removal of SS under aeration. The filter considered here is an upflow type filter with a sedimentation part at the bottom part. The developed model is applied to an aerated filter incorporated into the pre-coagulation and biofilm reactor process, in which removal of nitrogen and phosphorus as well as organic matter is intended. The aerated filter is applied after the position of denitrification tank in the nitrification-denitrification biofilm process to be expected to remove residual organic matter and SS and to restore DO concentration. The developed model is verified by comparing calculated results with the experimentally obtained data. It is clarified by using this model that the ideal height of the filter is about 2700 mm and the operational HRT of 1 h in the aeratedfilter can be available in this process.