Sludge density index (SDI) of effluent treated by improved formula is below 5.0, and it would meet the quality requirement of the influent of following reverse osmosis unit.
经改进配方，处理的排污水的污泥密度指数(SDI)小于5.0，能够满足后续反渗透单元的进水要求。
2
Two methods determining the sludge volume index under diluting sludge concentration and practical sludge concentration are analysed and compared.
同时，对在稀释浓度和实际浓度条件下测定污泥指数的两种方法进行了分析比较。
3
The specific gas production activity of anaerobic sludge is an important index in anaerobic wastewater treatment.