Experimental study on pretreatment to high sulfate and organic wastewater with method of anaerobic reverse-sulfide and precipitation
SI Guang-yuan
CHEN Ye
MEI Kai
Abstract：After four stages of the hydraulic loading being lifted,high sulfur and organic wastewater approached the actual water quality conditions(CODcr concentration=9 300 mg/L,equivalent organic sulfides concentra-tion=534 mg/L)and was anaerobic biological treated through the hydrolysis acidification reactor.Finally, CODCr loading rate reached 1 1 kg/(m3 ·d)and obtained the conclusions of sulfide inhibition concentration 400 mg/L,organic sulfide reverse-sulfide rate reaching 80% and CODCr removal rate reaching 54%.In order to remove sulfides by process of precipitation respectively the effects of the amount of precipitation agent add-ed,stirring speed and the initial pH on the removal of sulfides were investigated .Finally,the optimum condi-tions were determined as initial pH=7.5,FeCl2·4H2O adding amount of n(Fe2+)n(S2-)=1 .1 and stir-ring speed of 80 r/min for 30 min with sulfide removal rate reached 81%.
Keywords：high sulfate and organic wastewateranaerobic reverse-sulfide methodprecipitation method
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 25-29 )