Energy Recovery And Carbon Dioxide Emission Perspectives Of Anaerobic Digestion Of Palm Oil Mill Effluent

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dc.contributor.authorChou, Kian Weng
dc.date.accessioned2019-04-03T06:43:28Z
dc.date.available2019-04-03T06:43:28Z
dc.date.issued2018-06
dc.description.abstractThis study aims to evaluate the performance of two-stage anaerobic digestion (AD) of POME with aerobic post-treatment. The single-stage AD served as a comparison for the two-stage AD. Evaluation on the AD was mainly focused on biogas production and treatment efficiency whereas the evaluation on aerobic post-treatment was emphasized on treatment efficiency and final effluent quality. Laboratory scale anaerobic digester was used to develop single-stage AD then modified into a two-stage AD. Laboratory scale bioreactors were used as activated sludge system (AS) then modified into activated sludge system with sludge recirculation (ASR) for aerobic post-treatment. The best experimental results were used to estimate the energy yield, CO2 emission, and CO2 emission reduction from a simulated POME treatment system. The single-stage AD of POME using a thermophilic anaerobic contact digester (TACD) which operated at 55 °C and hydraulic retention time (HRT) of 10.00 days demonstrated methane (CH4) yield of 0.385 L/g CODdegraded with a production rate of up to 24.191 L/L POME which equivalent to 781.42 MJ/m3 POME. The corresponding COD and TSS degradation were 83.9 and 63.2 %, respectively. The COD, BOD3, and TSS concentration of the final effluent were 789, 19, and 108 mg/L, respectively; whereas the true colour, apparent colour and turbidity was 4835 and 5888 Pt-Co and 41 NTU, respectively. The two-stage AD of POME using a thermophilic dark fermenter and a thermophilic anaerobic contact digester (TACD) which operated at 55 °C and hydraulic retention time (HRT) of 10.00 days demonstrated hydrogen (H2) yield of 0.314 L/g CODdegraded and a production rate of 1.714 L/L POME and CH4 yield of 0.397 L/CODdegraded and a production rate of 23.230 L/L POME, equivalent to 765.29 MJ/m3 POME.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7928
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectCarbon dioxide emission perspectives ofen_US
dc.subjectanaerobic digestion of Palm oil mill effluenten_US
dc.titleEnergy Recovery And Carbon Dioxide Emission Perspectives Of Anaerobic Digestion Of Palm Oil Mill Effluenten_US
dc.typeThesisen_US
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