Abstract
The final goal of this study is to establish an effective recycling system for reclaiming waste materials that are commonly produced in sewage treatment processes. Also excess sludge, which is mass-produced and is difficult to dehydrate, was experimentally utilized as reusable deodorizer. Hence, as a preliminary experiment, the following procedures were taken. First, the components of sludge were transformed by electrolytic treatment, and, second, verification to prove the deodorizing efficacy of dehydrated sludge (moisture contents 80%) on typical odors produced in processes of sewage treatment was conducted by the batch deodorization experiment. As the result, more than 85-95% deodorizing efficiency by this electrolytically treated sludge was obtained in a short period of time. By the continuous deodorization experiment, durability of deodorizing efficacy was examined. As the result, a stable 99% deodorizing efficacy for 400 hours was obtained. Moreover, further durability of deodorizing efficacy could be obtained by maintaining the moisture content of the electrolytically treated sludge. From results of several experiments, the high possibility of recycling electrolytically treated sludge as a deodorizer was found.
