Bioresource Technology, Vol.216, 529-536, 2016
A bio-anodic filter facilitated entrapment, decomposition and in situ oxidation of algal biomass in wastewater effluent
This study examined for the first time the use of bioelectrochemical systems ( BES) to entrap, decompose and oxidise fresh algal biomass from an algae-laden effluent. The experimental process consisted of a photobioreactor for a continuous production of the algal-laden effluent, and a two-chamber BES equipped with anodic graphite granules and carbon-felt to physically remove and oxidise algal biomass from the influent. Results showed that the BES filter could retain ca. 90% of the suspended solids ( SS) loaded. A coulombic efficiency ( CE) of 36.6% ( based on particulate chemical oxygen demand ( PCOD) removed) was achieved, which was consistent with the highest CEs of BES studies ( operated in microbial fuel cell mode ( MFC)) that included additional pre-treatment steps for algae hydrolysis. Overall, this study suggests that a filter type BES anode can effectively entrap, decompose and in situ oxidise algae without the need for a separate pre-treatment step. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords:Bioelectrochemical systems;Waste stabilisation pond;Algal biomass;Suspended solids;Anodic filter