Study Efficiency and Possibility of Biogas Production from Effluent from anaerobic digestion with Glycerol Waste

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Published: Jul 27, 2022
Keywords:
Palm oil mill effluent Biogas Glycerol Waste Anaerobic digestion effluent

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Konkanok Srinunsuk
School of Engineering and Technology, Walailak University, Nakhon Si Thammarat 80160, Thailand
Pornwimon เวชสิทธิ์
School of Engineering and Technology, Walailak University, Nakhon Si Thammarat 80160, Thailand
Kamchai Nuithitikul
School of Engineering and Technology, Walailak University, Nakhon Si Thammarat 80160, Thailand, Biomass and Oil-Palm Center of Excellence, Walailak University, Nakhon Si Thammarat 80160, Thailand
Chairat Siripattana
School of Engineering and Technology, Walailak University, Nakhon Si Thammarat 80160, Thailand

Abstract

Currently, the oil palm products is insufficient for palm oil extraction plants. As a result, the biogas production process is lacking of the feedstock. This research focuses on the efficacy and feasibility of bringing Effluent from anaerobic digestion back to the biogas production process. Glycerol waste was added to the Effluent from anaerobic digestion at different ratios. The results showed that the Effluent from anaerobic digestion/palm oil mill effluent ratio of 80:20 with the addition of 3% glycerol gave the highest methane content in biogas. The highest methane content was 62.09% and the methane yield was 240.17 mL-CH4/g-CODadded. The maximum COD removal at this condition was 76%. This condition was selected for further study in a 10-liter continuous stirred tank reactor (CSTR). At HRT of 25 days, the maximum daily methane production was 8,031 mL-CH4 /day and the cumulative methane production was 145,554 mL-CH4. This was equivalent to the maximum daily methane yield of 668 mL-CH4/g-VSadded. The experimental results from the batch and continuous operations were found to fit the extendend AMCO model as indicated by very good correlation coefficients (R2).

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How to Cite
Srinunsuk, K., เวชสิทธิ์ P., Nuithitikul, K., & Siripattana, C. (2022). Study Efficiency and Possibility of Biogas Production from Effluent from anaerobic digestion with Glycerol Waste. YRU Journal of Science and Technology, 7(2), 53–62. retrieved from https://li01.tci-thaijo.org/index.php/yru_jst/article/view/253135
Issue
Vol. 7 No. 2 (2022): พฤษภาคม - สิงหาคม
Section
Research Article
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการเผยแพร่ในวารสารวิทยาศาสตร์และเทคโนโลยี มรย. นี้ ถือเป็นลิขสิทธิ์ของวารสารวิทยาศาสตร์และเทคโนโลยี มรย. หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือกระทำการใดๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษรจากวารสารวิทยาศาสตร์และเทคโนโลยี มรย. ก่อนเท่านั้น

Author Biographies

Konkanok Srinunsuk, School of Engineering and Technology, Walailak University, Nakhon Si Thammarat 80160, Thailand

Currently, palm oil mill effluent (POME) is a main source of biogas in Thailand. However, POME supply has been fluctuating seasonally and sometimes become shortage. Hence, the industry has to search for new feedstock for co-digestion with POME to maintain the required production rate through the year. The research focuses on the study of the efficiency and feasibility of reusing the the anaerobic digestion effluent (ADE) which contain 20,000 mg/L of COD to co-digest with POME (ADE/POME between  0-1) and glycerol waste (GW 1, 3, 5 and 7% supplement). The results showed that the effluent from anaerobic digestion/palm oil mill effluent ratio of 80:20 with the addition of 3% glycerol gave the highest methane content in biogas. The highest methane content was 62.09% and the methane yield was 271 mL-CH4/g-COD added. The maximum COD removal at this condition was 80%. This condition was selected for further study in a 10-liter continuous stirred tank reactor (CSTR). At an HRT of 25 days, the average daily methane production was 8,031 mL-CH4 /day and the cumulative methane production was 145,554 mL-CH4. This was equivalent to the average daily methane yield of 518 mL-CH4/g-VS added or 299 mL-CH4/g-CODadded. Moreover, it was found that the system was highly stable at this condition, providing steady biogas. It is also easy to adjust the production rate to achieve on-demand concept. Thus, it can be applied in the existing industrial plants without new design

Pornwimon เวชสิทธิ์, School of Engineering and Technology, Walailak University, Nakhon Si Thammarat 80160, Thailand

Currently, palm oil mill effluent (POME) is a main source of biogas in Thailand. However, POME supply has been fluctuating seasonally and sometimes become shortage. Hence, the industry has to search for new feedstock for co-digestion with POME to maintain the required production rate through the year. The research focuses on the study of the efficiency and feasibility of reusing the the anaerobic digestion effluent (ADE) which contain 20,000 mg/L of COD to co-digest with POME (ADE/POME between  0-1) and glycerol waste (GW 1, 3, 5 and 7% supplement). The results showed that the effluent from anaerobic digestion/palm oil mill effluent ratio of 80:20 with the addition of 3% glycerol gave the highest methane content in biogas. The highest methane content was 62.09% and the methane yield was 271 mL-CH4/g-COD added. The maximum COD removal at this condition was 80%. This condition was selected for further study in a 10-liter continuous stirred tank reactor (CSTR). At an HRT of 25 days, the average daily methane production was 8,031 mL-CH4 /day and the cumulative methane production was 145,554 mL-CH4. This was equivalent to the average daily methane yield of 518 mL-CH4/g-VS added or 299 mL-CH4/g-CODadded. Moreover, it was found that the system was highly stable at this condition, providing steady biogas. It is also easy to adjust the production rate to achieve on-demand concept. Thus, it can be applied in the existing industrial plants without new design.

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