Enhanced biogas production by mesophilic and thermophilic anaerobic co-digestion of palm oil mill effluent with empty fruit bunches in expanded granular sludge bed reactor

1st Siliwangi International Conference on Innovation in Research 2018

Fitrah, R.^1 ; Ahmad, A.^1 ; Amri, I.^1

Department of Chemical Engineering, University of Riau, HR Subrantas Rd. km 12.5, Pekanbaru

28293, Indonesia^1

关键词: Anaerobic co-digestion;    Biogas production;    Empty fruit bunches;    Expanded granular sludge bed reactor;    Hydraulic retention time;    Mesophilic temperature;    Palm oil mill effluents;    Thermophilic temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/550/1/012029/pdf
DOI  :  10.1088/1757-899X/550/1/012029

来源: IOP

【 摘 要 】

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 m3 CH4/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 m3 CH4/kg COD removed) VFA/TA ratios increased to 0.4498 - 0.6685 with COD removal 61.97 - 74.65 %.