膜分離活性汚泥の細胞内外成分分析および種々の活性汚泥との比較

抄録

The objective of this study was to investigate intra- and extra-cellular materials of membrane separation activated sludge (MSAS). From the result, we discussed on the relationship between extra-cellular materials and floc size of MSAS and compared five different kinds of activated sludge process: a conventional process, a sequential batch process, an A₂O process and two MSAS processes with and without wasting excess sludge. The MSAS process without wasting excess sludge treated real sewage for 9 months. It was found out that most of the microbial flocs in MSAS were smaller than 45μm, and that smaller flocs in MSAS had more extracellular materials per MLSS than larger flocs. From the result of comparison among five different kinds of activated sludge, although there was little difference of the amount of intra-cellular materials, MSAS without wasting excess sludge had the least extra-cellular materials.