DefinePK

Abstract

In this paper, the water quality index (WQI) was used as a indicator to assess the pollution level of the water quality in the To Lich River. The comparison of most important factors on the sulfide generation in the open channel and pipe sewers system was presented. The result also denoted that the close relationship between Oxygen - Redox Potential (ORP) values and log {[S2-]/ [SO42-]} by correlation coefficient R2 = 0.6369. And surface water layer was the main source of To Lich River to produce sulfide by Sulfate Reducing Bacteria (SRB). The factors to affect the sulfide generation rate in the To Lich River (open channel) were organic matter (BOD5), and environmental conditions such as ORP, pH, and Temperature (T). The found model in this study for estimating the sulfide generation from the To Lich River depended on the variables such as: ORP, T, pH, BOD5, with the correlation coefficient R2 = 0.9619, as follows:[S2-] = 0.0063 * ORP + 0.0427 * T - 4.371 * pH - 0.0012 * BOD5 + 31.87