The removal rate of COD is in 52%~83%. The value of COD of effluent water is smaller than 100 mg/L,the removal rate of SS is about 95%. When UASB is used to treat municipal wastewater,the best retention time is 6 hours.
Through the parallel measurement and analysis of BOD_5 and COD_(Cr) of the municipal waste water of Lianyungang, this article studies the characteristics of the waste water of the city and gives out the way to study the relativity of the BOD_5 and COD_(Cr) of the municipal waste water.
Average volume load rate、average sludge load rate and the effluent value of BOD5/COD of a Submerged-flat Membrane Bioreactor (MBR) and a Conventional Activated Sludge process (CAS) which were used in the treatment of municipal wastewater were compared.
recycled activated sludge is used to treat municipal wastewater in one county,the whole process is simple,and the retention time is short,and the removal rate of SS,BOD5,COD and ammonia nitrogen are more than 90 per cent,90 per cent,85 per cent and 70 per cent respectively,and the concentration of TP is 1.5 mg/l,all the data can meet the first class standard of GB8978-2002.
Activated carbon was prepared from the sewage sludge of municipal wastewater treatment plant by chemical activation (activation reagent is ZnCl2) and was used for the adsorption of dye (reactive brilliant red K-2BP).
Development and application of some renovated technologies for municipal wastewater treatment in China
Wastewater discharge, especially municipal wastewater discharge, and non-point pollution sources are becoming the major water pollution source and research focus.
Great efforts have been made on water pollution control and a number of renovated technologies and processes for municipal wastewater treatment and reclamation as well as non-point pollution control have been developed and applied in China.
The aerobic activated sludge from a municipal wastewater treatment plant was used as the experimental material.