Biogas Production from Oil Palm Empty Fruit Bunches and Palm Oil Decanter Cake using Solid-State Anaerobic co-Digestion

Muthita Tepsour, Nikannapas Usmanbaha, Thiwa Rattanaya, Rattana Jariyaboon, Sompong O-Thong, Poonsuk Prasertsan and Prawit Kongjan
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Muthita Tepsour: Department of Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Meung, Pattani 94000, Thailand
Nikannapas Usmanbaha: Bio-Mass Conversion to Energy and Chemicals (Bio-MEC) Research Unit, Faculty of Science and Technology, Prince of Songkla University, Pattani 94000, Thailand
Thiwa Rattanaya: Bio-Mass Conversion to Energy and Chemicals (Bio-MEC) Research Unit, Faculty of Science and Technology, Prince of Songkla University, Pattani 94000, Thailand
Rattana Jariyaboon: Department of Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Meung, Pattani 94000, Thailand
Sompong O-Thong: Department of Biology, Faculty of Science, Thaksin University, Phatthalung 93110, Thailand
Poonsuk Prasertsan: Research and Development Office, Prince of Songkla University, Hatyai, Songkhla 90110, Thailand
Prawit Kongjan: Department of Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Meung, Pattani 94000, Thailand

Energies, 2019, vol. 12, issue 22, 1-14

Abstract: Oil palm empty fruit bunches (EFB) and palm oil decanter cake (DC) were used to investigate biogas production by using solid-state anaerobic co-digestion (SS-AcoD) with 15% total solid (TS) content. Solid state anaerobic digestion (SS-AD) using substrate to inoculum (S:I) ratio of 3:1, methane yields of 353.0 mL-CH 4 /g-VS and 101.5 mL-CH 4 /g-VS were respectively achieved from mono-digestion of EFB without oil palm ash (OPA) addition and of DC with 10% OPA addition under mesophilic conditions 35 °C. By adding 5% OPA to SS-AD using 3:1 S:I ratio under thermophilic conditions (55 °C), mono-digestion of EFB and DC provided methane yields of 365.0 and 160.3 mL-CH 4 /g-VS, respectively. Furthermore, SS-AcoD of EFB:DC at 1:1 mixing ratio (volatile solid, VS basis), corresponding to carbon to nitrogen (C:N) ratio of 32, gathering with S:I ratio of 3:1 and 5% ash addition, synergistic effect is observed together with similar methane yields of 414.4 and 399.3 mL-CH 4 /g-VS, achieved under 35 °C and 55 °C, respectively. According to first order kinetic analysis under synergistic condition, methane production rate from thermophilic operation is 5 times higher than that from mesophilic operation. Therefore, SS-AcoD could be potentially beneficial to generate biogas from EFB and DC.

Keywords: Gaseous bio-fuel; Oil palm biomass; Oil palm ash; Liquid anaerobic digestate; SS-AcoD (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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