Study on land application of sewage sludge in Beijing

The treatment of sludge is an integral part of a wastewater treatment process. With the volume of sewage sludge requiring disposal increasing significantly in Beijing as sewage treatment facilities have been extended, a more and more critical pressure has been exerted on the facilities and the environment. Based on the analysis of sludge's quality, quantity and Beijing's land quality status, the perspective of land application of sewage sludge is presented. It would bring us a notable benefit both in environment and society. It is indicated that we could obtain two hundreds million yuan per year and alleviate about 30 percent of nitrogen load in agriculture non-point source pollution, with applying one million tons sludge manures to the farmland. In conclusion, we state that it is the best choice for Beijing to apply the sewage sludge to the land.