Treatability Of Palm Oil Mill Effluent (Pome) Using Black Liquor In An Anaerobic Treatment Process

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dc.contributor.authorLing, Yu Lang
dc.date.accessioned2016-11-02T00:55:20Z
dc.date.available2016-11-02T00:55:20Z
dc.date.issued2007-07
dc.description.abstractTreatability studies of POME in various operational conditions were studied. A laboratory study was carried out at thermophilic temperature (55°C) to assess and compare the effect of two types of media, seeding and substrate on the anaerobic digestibility of (palm oil mill effluent) POME. Chemical oxygen demand (COD) reduction was monitored to evaluate the effect of media, seeding and substrates on the system performance. The COD removal was up to 59.9% from the initial COD concentration of 9.30 gIL that was achieved from the digested POME digester with palm kernel shell as a media, and fed with solubilised POME. Sodium Hydroxide (NaOH) solubilisation at different temperature, pH and treatment time was studied to determine the best condition for POME solubilisation in order to improve the POME treatability by anaerobic digestion process. The COD removal efficiency increased 5.9% from 40.9% prior solubilisation to 46.8% after solubilisation at pH 10, temperature 120°C and retention time 90 minutes. The feasibility of anaerobic digestion treating POME with addition of chemical pulping black liquor was studied in semi-continuous fed digesters under thermophilic (55°C) and mesophilic (35°C) condition. The anaerobic digestibility of raw POME and POME with addition of chemical pulping black liquor (2.5% to 20% by volume) was compared. The chemical oxygen demand (COD) reduction for hydraulic retention time (HRT) of 5 days and 10 days were examined to evaluate the effect of HRT on the performance of digesters. Thermophilic anaerobic process was more effective than mesophilic process to treat either raw POME or POME with addition of black liquor. The experiment resulted that COD reduction up to 87.2% can be achieved in raw POME digester at OLR 8.30 g CODIUday and the COD reduction in black liquor added digester was 78.9% at OLR 8.67 g CODIUday under thermophilic condition. The specific methane gas yielded from raw POME at thermophilic condition was 0.124 to 0.066 LOWgCOD when the OLR was altered from 8.30 to 16.00 g CODIUday. The specific methane gas yielded from POME with addition of black liquor was ranged between 0.130 to 0.223 LcHJgCOD and 0.072 to 0.105 LCHJgCOD when the black liquor content was altered from 2.5% to 10% at 10 days and 5 days HRT respectively. POME with addition of 20% black liquor only achieved 0.059 and 0.018 LcHJgCOD with OLR 7.06 and 14.30 g CODIUday respectively.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/2950
dc.subjectA laboratory study was carried out at thermophilic temperature (55°C)en_US
dc.subjectto assess and compare the effect of two types of mediaen_US
dc.titleTreatability Of Palm Oil Mill Effluent (Pome) Using Black Liquor In An Anaerobic Treatment Processen_US
dc.typeThesisen_US
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