Resource utilization of sludge in urban sewage treatment plants
Qin Xue1, Lou Xiaoyue2, Li Zaixing1, Xue Fei3, Han Yonghui1, Bai Yuwei3,#br#
Li Gong2, Liu Haojun2, Ning Jing3
1. School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China; 2. Tianjin Redsun Water Industry Corporation Ltd., Tianjin 300270, China; 3. Water supply and Drainage company of Shijiazhuang High-New technology Industrial Development Area, Shijiazhuang 050000, China
In order to improve the efficiency of sludge resource utilization and achieve the goal of carbon peak, the present situation of sludge resource utilization in urban sewage treatment plants was reviewed, and the technologies of sludge utilization as organic fertilizer, biogas recovery, preparation of biochar, recovery of carbon, nitrogen and phosphorus, and production of building materials were also analyzed. Sludge with low toxic and harmful substance can be used to produce organic fertilizer or biogas. Sludge which is not suitable for agricultural can be used to produce building materials. If conditions permit, research and practical application of technologies such as biochar preparation from sludge and recovery of carbon nitrogen and phosphorus can be carried out. Sewage treatment plants need to take measures according to local condition, in order to treat and dispose of sludge scientifically and effectively.
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