Abstract
This work evaluates the feasibility of the biodegradable polymers (BDPs) bioreactor concept for removal of perchlorate from groundwater; and the likely impacts of nitrate and pH were also examined. Batch experiments demonstrated clearly that ClO4- was eliminated from the aqueous phase readily under appropriate surface biofilm of enriched mixed consortium on PBS, a new kind of BDPs, with the PBS granules as the sole chemical and physical substrate for the microorganism. Simultaneous perchlorate and nitrate degradation were occurring with the PBS granules degradation to supply conbon source. The optimal pH of perchlorate reduction was at 6.7. Morphological observation indicated the microbes in biofilm decomposed PBS through metabolism and provided carbon source for themselve by releasing small organic molecules.
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