Sludge treatment and disposal

Abstract

With the development of industrial economy and urbanization, the production of urban wastewater is growing. Sludge is a product generated from sewage treatment, so the amount of sludge produced is also increasing. It is easily led to secondary pollution by improper disposal. Sludge treatment and its disposal are important parts of wastewater treatment. The thesis deals with the problems of sludge secondary pollution. The environmental impact of sludge was summarized and methods of sludge treatment and disposal and the comprehensive utilization at home and abroad in recent years was introduced. The trend of sludge treatment and disposal for the future development was also observed respectively from four areas: the stabilization, reduction, harmlessness, and resource utilization of sludge. The way to dispose sludge for Tianjin Xian Yan Road sewage treatment plant was designed, combining with the current situation and existing problems as well as factors of constraints development in Tianjin, China.