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Jayashree C,Sweta Singh,Arulazhagan P,염익태,Iqbal M. I. I,Rajesh Banu J 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.4
Recalcitrant compounds like phenol found in coconut husk retting effluent cause the deterioration of water quality when discharged from retting ponds into other water sources. Continuous upflow microbial fuel cell (MFC) was evaluated for treating retting wastewater at different loading rates to determine power generation, chemical oxygen demand (COD) consumption rate and phenol removal for a period of 270 days. A maximum power density of 254 mW/m2 was achieved during the treatment of retting wastewater (external resistance - 350Ω). COD removal of 70% was accomplished at a loading rate of 0.45 g COD/L reactor/day and phenol removal of 95% was obtained at a loading rate of 0.28 g phenol/L reactor/day. The power density exhibited an increasing pattern as the loading rate of MFC was increased from 0.45 to 2.69 g COD/L reactor/day. This study describes the treatment of retting wastewater employing continuous upflow MFC with 95% phenol removal. Therefore, MFC can be considered as an alternative for the efficient removal of phenol and current generation in retting wastewater.
Energy-efficient methane production from macroalgal biomass through chemo disperser liquefaction
Tamilarasan, K.,Kavitha, S.,Rajesh Banu, J.,Arulazhagan, P.,Yeom, Ick Tae Elsevier 2017 Bioresource technology Vol.228 No.-
<P><B>Abstract</B></P> <P>In this study, an effort has been made to reduce the energy cost of liquefaction by coupling a mechanical disperser with a chemical (sodium tripolyphosphate). In terms of the cost and specific energy demand of liquefaction, the algal biomass disintegrated at 12,000rpm for 30min, and an STPP dosage of about 0.04g/gCOD was chosen as an optimal parameter. Chemo disperser liquefaction (CDL) was found to be energetically and economically sustainable in terms of liquefaction, methane production, and net profit (15%, 0.14gCOD/gCOD, and 4 USD/Ton of algal biomass) and preferable to disperser liquefaction (DL) (10%, 0.11 gCOD/gCOD, and -475 USD/Ton of algal biomass).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Chemo disperser liquefaction boost up disintegration synergistically. </LI> <LI> This modernistic method induces solubilization at DSE of 3312.6kJ/kg TS. </LI> <LI> Kinetic study represents rapid disintegration rate by this incentive process. </LI> <LI> Chemo disperser liquefaction archived a higher biodegradability (0.14gCOD/gCOD). </LI> <LI> Net profit of about 4 USD/per ton of algae biomass was achieved. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>