Abstract
Sewage treatment plants increased from 392 sites in 2008 to 432 sites in 2009. Effluent water quality standard in sewage treatment plants was reinforced with 20 mg/L TN and 2 mg/L TP in 2008. And TP sewage effluent water standard will be reinforced with 0.2 ~ 0.5 mg/L TP in 2012. In accordance with water quality reinforcement, production of sewage sludge will increased in treatment plant every year. Present state of sewage sludge treatment being disposed by ocean discharge, incineration, dry in domestic country. But the ocean discharge will be prohibited in 2012. So that, we will consider sewage sludge treatment from different point of view and sludge reuse (recycle) ratio will increase in sewage sludge treatment by compost, raw material of cement and fuel in power plant. and sewage sludge treat will be necessary vary of methods.