Biohydrogen Production from Palm Oil Mill Effluent Pretreated by Chemical Methods Using Thermoanaerobacterium-Rich Sludge
Publish place: Iranica Journal of Energy and Environment، Vol: 4، Issue: 4
Publish Year: 1392
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJEE-4-4_001
تاریخ نمایه سازی: 1 اردیبهشت 1393
Abstract:
The effect of alkaline and acid pretreatment on solubilization of solid organic matter in palm oil mill effluent (POME) and hydrogen production by Thermoanaerobacterium-rich sludge was studied. Organicmatter solubilization of alkaline and acid pretreatments were increased up to 28 and 15.7% of initial soluble CODin POME, respectively. That corresponds to carbohydrate solubilization of 41 and 32% of initial soluble carbohydrate in POME, respectively. A maximum hydrogen production yield of 4.6 l H2/l-POME was achieved from POME pretreated with 1.5% w/v NaOH, which was 3-fold greater than raw POME and 1-fold greater thanPOME pretreated with 1.5% w/v HCl. Optimum conditions for biohydrogen production from alkaline pretreatedPOME using Thermoanaerobacterium-rich sludge was found at initial pH 5.5 and temperature of 60°C, whichgives a maximum hydrogen production yield of 5.2 l H2/l-POME and increased 51% as compared to raw POME. The biogas was mainly composed of hydrogen and carbon dioxide with the percentage of hydrogen rangingfrom 55-60% of biogas and free of methane. During the conversion of alkaline pretreated POME into hydrogen,the acetic and butyric acids were main by-products in the metabolism. The results showed that alkalinepretreatment is an effective pretreatment methods for enhancing the hydrogen production yield from POME. The use of Thermoanaerobacterium-rich sludge is promising for future engineering practice of biohydrogen production from alkaline pretreated POME
Keywords:
Thermoanaerobacterium-rich sludge Palm oil mill effluent Biohydrogen Thermophilic condition Alkaline pretreatment
Authors
Jiravut Seengenyoung
Department of Industrial Biotechnology,Faculty of Agro-Industry, Prince of Songkla University, Songkhla ۹۰۱۱۲, Thailand
Poonsuk Prasertsan
Department of Industrial Biotechnology,Faculty of Agro-Industry, Prince of Songkla University, Songkhla ۹۰۱۱۲, Thailand
Sompong O-Thong
Department of Biology, Faculty of Science, Thaksin University, Phatthalung ۹۳۱۱۰, Thailand Microbial Resource Management Research Unit, Faculty of Science,Thaksin University, Phatthalung ۹۳۱۱۰ Thailand