Effect of Fenton pretreatment on anaerobic digestion of olive mill wastewater and olive mill solid waste in mesophilic conditions. Issue 6 (3rd May 2017)

• Record Type: Journal Article
• Authors: Maamir, Wail; Ouahabi, Yasmine; Poncin, Souhila; Li, Huai-Zhi; Bensadok, Kenza
• Is Part Of: International journal of green energy. Volume 14:Issue 6(2017)
• Page Start: 555
• Page End: 560
• Publication Date: 2017-05-03
• Subjects: Anaerobic digestion (AD) -- biogas production -- Fenton process (FP) pre-treatment -- Lignocellulose degradation -- olive mill waste (OMW); Power resources -- Research -- Periodicals; Energy industries -- Periodicals; Energy development -- Periodicals; 333.79
• DOI: 10.1080/15435075.2017.1307201
• Languages: English
• ISSNs: 1543-5075

Abstract

ABSTRACT: The olive mill waste (OMW) generated from olive oil extraction process constitutes a major environmental concern owing to its high organic and mineral matters and acidic pH. Anaerobic digestion (AD) is a main treatment for reducing the organic matter and toxic substances contained in OMW and generating at the same time, energy in the form of biogas. AD of OMW that contains lignocellulose is limited by the rate of hydrolysis due to their recalcitrant structure. This study is devoted to the effect of Fenton process (FP) pretreatment on olive mill wastewater (OMSW) /olive mill solid waste (OMWW) co-digestion to improve their digestibility and in this way the biogas production. The FP pretreatment was performed in batch mode at 25°C, various H2 O2 /[Fe 2+ ] ratios (100–1200), catalyst concentration ([Fe 2+ ]) ranging from 0.25 to 2 mM, reaction time varying from 30 to150 min, and different pH (3–11). The best performance was obtained with H2 O2 /[Fe 2+ ] = 1000, [Fe 2+ ] = 1.5 mM, 120 min, and pH 3. Biochemical methane potential (BMP) tests conducted in batch wise digester and at mesophilic conditions (37 °C) showed that cumulative biogas and methane production were higher without FP treatment, and correspond to 699 and 416 mL/g VS, respectively. However, pre-treated OMSW results into an increase of 24% of methane yield. After 30 days of AD, the methane yield was 63%, 54%, and 48%, respectively, for OMSW treated without iron precipitation, with iron precipitation and untreated OMSW sample.