Study on Decolorization Effect of Biological Strengthening the Activated Carbon with White Rot Fungi

Abstract

The colority and Chemical Oxygen Demand (COD) removal rates of biological strengthening the activated carbon with Phanerochaete chrysosporium and Rhodopseudomonas for papermaking and printing-dyeing wastewater were investigated. With 1 % (v/v) Phanerochaete chrysosporium, the colority removal rate for papermaking wastewater reached 80 % at 3 h of retention time, and for printing-dyeing wastewater at 1.5 h of retention time; the COD removal rate was 65.14 and 78.78 % respectively at 3 h of retention time. Having been treated by 1 % Rhodopseudomonas, the colority removal rate was lower than that induced by Phanerochaete chrysosporium, and the COD removal rate was 71.35 % for papermaking wastewater. Combined strains treatment produced the colority and COD removal rate of 90 and 80 % respectively for papermaking wastewater. The COD removal rate of the biological strengthening activated carbon technique strengthened by Rhodopseudomonas first was higher than that strengthened by Phanerochaete chrysosporium first.