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

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• 作者：Ajay Menon ; Fei Ren ; Jing-Yuan Wang…
• 关键词：Thermophilic AD ; pH adjustment ; Ultrasonication ; Substrate solubilization ; Food waste
• 刊名：Journal of Material Cycles and Waste Management
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：18
• 期：2
• 页码：222-230
• 全文大小：810 KB
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• 作者单位：Ajay Menon (1)
  Fei Ren (1)
  Jing-Yuan Wang (1)
  Apostolos Giannis (1)
  
  1. Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore, 637141, Singapore
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Waste Management and Waste Technology
  Environmental Management
  Industrial Pollution Prevention
  
• 出版者：Springer Japan
• ISSN：1611-8227

文摘

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.