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Effects of operating conditions on biogas production in anaerobic digestion system of food and beverage industry
Journal of the Science of Food and Agriculture ( IF 4.1 ) Pub Date : 2020-11-22 , DOI: 10.1002/jsfa.10930 Hsinjung Chen, Jui‐Min Hung, Kuo‐Chiang Hsu, Pei‐Ting Chuang, Chin‐Shuh Chen
Journal of the Science of Food and Agriculture ( IF 4.1 ) Pub Date : 2020-11-22 , DOI: 10.1002/jsfa.10930 Hsinjung Chen, Jui‐Min Hung, Kuo‐Chiang Hsu, Pei‐Ting Chuang, Chin‐Shuh Chen
BACKGROUND
Food residuals (FR) were anaerobically bio-transformed to produce biogases (e.g. methane and hydrogen) and different pre-treatment conditions, including particle sizes, oil contents, pH, and salt contents were controlled in this study. The bio-solids of a municipal solid waste (MSW) from a wastewater treatment plant were added to assess its effect on the anaerobic transformation efficiency and gas yields. RESULTS
The breaking of FR and the application of the MSW were effective in enhancing the transformation efficiency and yields of biogases. The energy transfer efficiency value of the combined FRs used in this study was probably 23%. However, it can be very cost-effective to apply arbitrary proportions to treat two types of FR in the anaerobic digestion tank of a wastewater treatment plant. It was also found that the alkalinity and pH value were the two major parameters that controlled the success of the transformation. About 0.16 to 0.17 kg of alkalinity was needed during the anaerobic digestion of one kilogram of dry FR, but this requirement was decreased by the treatment applying the MSW. Olive oil had higher reducing rates when used as a substitute for heat oxidized oil to study the effect of oil content on methylation. CONCLUSION
The conditions for anaerobic digestion established in this study were practical for the digestion of FR in wastewater treatment plants in Taiwan. However, we nonetheless found that it was cost-effective to use arbitrary proportions for both types of FR and integrate the anaerobic digestion process used in wastewater treatment plants. This article is protected by copyright. All rights reserved.
更新日期：2020-11-22
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