Open AccessEnhanced biogas production by mesophilic and thermophilic anaerobic co-digestion of palm oil mill effluent with empty fruit bunches in expanded granular sludge bed reactor
Author(s) -
Rochmat Bagus Al Fitrah,
Ahyar Ahmad,
Idral Amri
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/550/1/012029
Subject(s) - pome , mesophile , biogas , hydraulic retention time , pulp and paper industry , chemistry , volume (thermodynamics) , anaerobic digestion , effluent , alkalinity , waste management , methane , biology , genetics , physics , organic chemistry , quantum mechanics , bacteria , engineering
This study aimed to utilize Palm Oil Mill Effluent (POME) and preheated Empty Fruit Bunches (EFB) as a source for enhanced biogas production in Expanded Granular Sludge Bed (EGSB) Reactor. The reactor was operated continuously for 48 days with 2 days hydraulic retention time (HRT), POME: EFB mixing ratios of 1: 0; 0.10; 0.15; 0.20; temperature of 35 ± 2±C and 55 ± 2±C. The best improved was achieved from co-digestion of POME with EFB at a mesophilic temperature of 35 ± 2±C and mixing ratios of 1: 0.10, highest total biogas volume achieved was 7,400 ml (0.1359 – 0.1619 m 3 CH 4 /kg COD removed), Volatile Fatty Acid (VFA)/Total Alkalinity (TA) ratios 0.1418 – 0.1582, and COD removal 61.97 – 78.87 %. The Methane content was 46.10 %. Under a Thermophilic temperature of 55 ± 2±C and mixing ratios of 1: 0, 10, the highest total biogas volume achieved was 1.350 ml (0.0859 – 0.1358 m 3 CH 4 /kg COD removed) VFA/TA ratios increased to 0.4498 – 0.6685 with COD removal 61.97 – 74.65 %.