With the improvement of emission standards of urban sewage treatment, most of the sewage treatment plant should be upgraded. For COD, BOD, NH3, TN, TP and other indicators, we introduced biological equipments and technologies of moving bed and FBAF  to complete sewage treatment plant upgrading and wastewater reuse.

Because of the sludge disposal problem is increasingly serious and urgent, sludge disposal problem is an important and serious topic in front of us, we need to solve it in a better way. On the other hand, we have many attempts, experiences and lessons.