Development of Sludge Digestion Process by a Fluidized Bed Bioreactor

研究了以聚乙烯醇（PVA）凝胶为生物载体固定化细菌的流化床-生物反应器对产生的污泥进行同步脱氮消化的工艺。本研究采用凝胶固定化硝化细菌和反硝化细菌，使其在每个丙烯酸酯反应器中的填充量达到10vol%，并对反硝化-硝化循环连续流进行了研究。在与硝化反应器相连的完全氧化反应器中，硝化和反硝化过程中产生的废污泥通过细菌的自溶进行消化。结果表明，该反应器系统能够同时去除氮和BOD，具有消化污泥的可能性。

The process of simultaneous nitrogen removal and digestion of generated sludge by a fluidized bed-bioreactor using polyvinyl alcohol (PVA) gel as a baiocarrier for immobilization of bacteria was investigated. In this research, the gel immobilized nitrifying and denitrifying bacteria that filled up to 10vol% of each acryl tank reactor, and the denitrification-nitrification circulating continuous flow was investigated. In the complete oxidation reactor connected to the nitrification reactor, the waste sludge generated in the nitrification and denitrification process was digested by autolysis of bacteria. As a result, it was shown that the reactor system could remove nitrogen and BOD simultaneously, and had the possibility of the digestion of waste sludge.