Evaluating the Influence of Operating Conditions on Silt Density Index
JIE Li-Xin, WANG Xiao-Lei, WANG Shi-Chang
School of Chemical Engineering and Technology, Tianjin University, Tianjin Key Laboratory of Membrane Science and
Desalination Technology, Tianjin 300072, China
Abstract：
Silt Density Index (SDI), an important evaluative indicator to assess the reverse osmosis (RO) water pretreatment system, can express contaminants in water quantitatively. In this paper, the SDI value was tested to analyze the effect of operating conditions. The results showed that the colloidal iron and organic matters played the key important roles among the different operating conditions. For the water stream containing colloidal iron and organic matters, the SDI value decreased with the decrease of pH of the water stream, and increased dramatically with the increase of pH when pH of the water stream is above 7.
JIE Li-Xin, WANG Xiao-Lei, WANG Shi-Chang.Evaluating the Influence of Operating Conditions on Silt Density Index[J]. Chemcial Industry and Engineering, 2013,30(4): 42-47
2013, Vol. 30 
