Optimization of biomethane production by anaerobic digestion of palm oil mill effluent using response surface methodology

Saleh, Alfian; Kamarudin, E.; Yaacob, Adzmi; Yussof, Abdul Wahid; Abdullah, Maha

doi:10.1002/apj.550

Cited by 28 publications

(26 citation statements)

References 23 publications

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“…Recently, response surface methodology (RSM) has emerged as a powerful tool to optimize the overall effect of various factors on anaerobic digestion such as substrate mixing ratios for biohydrogen production [17], feeding rate and C/N ratios for biogas production [18], and temperature and substrate to inoculum ratio in AD of palm oil mill effluent [19]. RSM is a collection of mathematical and statistical techniques useful for analyzing the effects of several independent variables on the response [20].…”

Section: Introductionmentioning

confidence: 99%

Effect of pretreatment techniques on food waste solubilization and biogas production during thermophilic batch anaerobic digestion

Menon

Ren

Wang

et al. 2015

J Mater Cycles Waste Manag

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The purpose of this study was to optimize the alkaline, ultrasonication, and thermal pretreatment in order to enhance the solubilization of food waste (FW) for the production of volatile fatty acids, hydrogen, and methane in thermophilic batch anaerobic digestion. Initially, the effect of pretreatment techniques in the acidogenic phase was studied, and the optimal combinations of different conditions were determined. It was found that each pretreatment technique affected food waste solubilization differently. Alkaline pretreatment increased hydrogen yield in the acidogenic sludge by four times over control. COD solubilization was increased by 47 % when FW pre-heated at 130°C for 60 min. Ultrasonication at 20 kHz and 45 min reduced processing time to 38 h from the 60-80 h needed in normal operation. Response surface methodology (RSM) was used to optimize a combination of alkaline, ultrasonication, and thermal pretreatment. Optimized conditions were applied to methanogenic single-stage thermophilic AD process, and their impact on biogas production was monitored. Results showed that FW heated at 130°C for 50 min geminates biogas production compared to control experiment. In conclusion, a short thermal pretreatment regime could significant affect biogas production in single-stage thermophilic AD.

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Section: Introductionmentioning

confidence: 99%

Effect of pretreatment techniques on food waste solubilization and biogas production during thermophilic batch anaerobic digestion

Menon

Ren

Wang

et al. 2015

J Mater Cycles Waste Manag

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“…The elemental compositions of carbon, hydrogen, nitrogens and sulfur of OPEFB (Table ) were 40.1, 5.3, 1.4, and 0.29 %, respectively, which are comparable to 45.5, 6.1, 1.7, and 0.14 %, respectively . The C:N ratio of 29:1 suggests the presence of nutrients and minerals required for bacterial growth.…”

Section: Resultsmentioning

confidence: 81%

“…In such conditions, methanogenesis cannot occur as it requires a pH of 6.5–7.5. The methanogens may not be able to keep up with this change and degrade acids as fast as they are generated, reducing the methanogen activity and leading to low biomethane production …”

Section: Resultsmentioning

confidence: 99%

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Enhanced palm oil mill effluent treatment and biomethane production by co‐digestion of oil palm empty fruit bunches with Chlorella Sp

et al. 2014

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Palm oil mill effluent (POME) has high chemical oxygen demand (COD) and biological oxygen demand (BOD) and minerals such as nitrogen and phosphorous which can cause severe pollution to the environment and water resources. In this study, aerobic and anaerobic co‐digestion of oil palm empty fruit bunches (OPEFB) with Chlorella sp. was developed for POME treatment and biomethane production. Higher removal efficiency (56–98 %) of COD, BOD, TOC, and TN after 3 and 7 days' treatment were achieved with microalgae than without microalgae. Using response surface methodology, the highest specific biogas production rate (0.128–0.129 m3/kg COD/day) and biomethane yield (5256.8–5295.8 mL/L POME/day) were achieved with Chlorella sp. at 2 mL/mL POME, and OPEFB at 0.12 g/mL POME. Without both microalgae and OPEFB, the methane yield was 1.4‐fold lower. The values for optimum conditions were predicted well by the model within 5 % error.

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“…At the initial stage of diesel oil sorption onto the kapok surface, the hydrophobic interactions and the Vander Waals forces could play important role between the oils and waxy surface coating [2]. However, the reduced waxy surface in SKF has improved the affinity for POME which has 95-96% water content [30,31].…”

Section: Morphological Characterizationmentioning

confidence: 99%

Comparative study on structural modification ofCeiba pentandrafor oil sorption and palm oil mill effluent treatment

Abdullah

Afzaal

Ismail

et al. 2014

Desalination and Water Treatment

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A B S T R A C TThe performance of raw Ceiba pentandra (L.) Gaertn (raw kapok fibers (RKF)) for oil sorption and palm oil mill effluent (POME) treatment was compared with structurally modified kapok (NaOH-treated (SKF) and surface-modified kapok fiber (SMKF)) and bentonite clay. Based on FTIR, kapok wax functional group at 1726/cm was not detected in SKF rendering higher hydrophilicity. The reduction in peak intensity at 473 and 523/cm upon HCl treatment of bentonite, suggests the cleavage of Si-O-Al bond layer and Si-O-Mg (Fe) bonds. For filtration under gravity at 0.08 g/cm 3 , SKF showed high POME sorption of 82 g/g, but lower diesel sorption of 23 g/g. With HCl-treated bentonite, POME sorption at 69 g/g was only slightly higher than diesel sorption of 60 g/g. However, RKF and raw bentonite achieved higher removal efficiency of biological oxygen demand, chemical oxygen demand (COD), total organic carbon, and total nitrogen at 74-98% and 72-94%, respectively, than with SKF at 66-80%, and HCl-treated bentonite at 64-80%. In batch mode, SMKF at 0.08 g/ cm 3 showed the highest oil sorption capacity of 56.7 g/g for Crude Palm Oil (CPO) and 33.7 g/g for diesel. Under continuous mode with 4000 mg/l CPO in water, 99% of COD removal was achieved at all packing densities and flow rates, regardless of kapok packing material. The dynamic oil retention was 96-99% for CPO and 99-100% for diesel at all packing densities. RKF and SMKF can both be suitable sorbent materials for CPO and diesel sorption, and for POME treatment.

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Optimization of biomethane production by anaerobic digestion of palm oil mill effluent using response surface methodology

Cited by 28 publications

References 23 publications

Effect of pretreatment techniques on food waste solubilization and biogas production during thermophilic batch anaerobic digestion

Effect of pretreatment techniques on food waste solubilization and biogas production during thermophilic batch anaerobic digestion

Enhanced palm oil mill effluent treatment and biomethane production by co‐digestion of oil palm empty fruit bunches with Chlorella Sp

Comparative study on structural modification ofCeiba pentandrafor oil sorption and palm oil mill effluent treatment

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