Abstract:

Sludge is the remains of wastewater treatment plant. With the development of society and the lack of resources, the sewage sludge has become an important means of sludge treatment. The biosolids, which are formed by composting of sewage sludge, applied to farmland, woodland, grassland, municipal green, fruit and vegetable land, so as to restore vegetation on serious disturbance land and promote soil ripening. Sludge contains many organic matters which are well used as fertilizer. This paper mainly reviewed the history and present situation of sewage sludge compost on farm, the principle and process of sewage sludge compost, applications in agriculture, forestry, vegetables, flowers, fruit trees and land reconstruction as well as development tendency in agriculture.