Renewable energy production from organic wastes by high-solid methane fermentation

Yu You Li, Mizuno Osamu, Funaishi Kesuke

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A newly developed high-rate methane production process for treating organic fraction of municipal solid waste (OFMSW) was introduced in this paper. This process was composed of three parts, mixing tank, thermophilic hydrolytic/acidogenic reactor (55°C), mesophilic methanogenic reactor (35°C). In this process, the shredded OFMSW was firstly mixed in the mixing tank with the digested sludge re-circulated from the methanogenic reactor for making fluid slurry. The slurry was then hydrolyzed in thermophilic acidogenic reactor to soluble organics such as acetate, propionate and lactate etc. Finally, the hydrolyzed slurry was converted to biogas in mesophilic methanogenic reactor. A bench-scale continuous experiment was conducted with shredded OFMSW by changing the retention time of the process from 30 days to 10 days. The OFMSW with a moisture content of 77% (TS 23%) was effectively degraded to biogas at a HRT reduced to 12.5 days, corresponding to a CODCr loading rate of 30 kg-CODCr·m-3·d-1, without adding dilution water. The experimental results demonstrated that the organic degradation efficiency was as high as 85%, and one ton of OFMSW produced biogas of 150 m3 with methane content of around 60%.

Original languageEnglish
Title of host publicationProceedings of the 2003 Energy and Environment
EditorsG.-M. Zeng, G.-H. Huang, Z.-H. Yang, Y.-J. Jiang
Number of pages6
Publication statusPublished - 2003
EventProceeding of the 2003 Energy and Environment - Changsha, China
Duration: 2003 Oct 112003 Oct 14

Publication series

NameProceeding of the 2003 Energy and Environment


ConferenceProceeding of the 2003 Energy and Environment


  • Anaerobic digestion
  • Biogas
  • Mesophilic methanization
  • Municipal solid waste
  • Thermophilic acidogenesis


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