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Shubiao Wu

Performance and kinetic evaluation of semi-continuously fed anaerobic digesters treating food waste: Role of trace elements

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  • Wanqin Zhang, China Agricultural University
  • ,
  • Shubiao Wu
  • Jianbin Guo, China Agricultural University
  • ,
  • Jie Zhou, China Agricultural University
  • ,
  • Renjie Dong, China Agricultural University

This study investigated the effects of trace elements (TEs) on the anaerobic digestion (AD) of food waste (FW) in laboratory-scale semi-continuously fed anaerobic digesters. The duration of digesters operation was approximately 400days. Organic loading rates (OLRs) ranged from 1.0 to 5.5gVSL-1d-1 at 37°C. Results showed that methane production of the digester was severely inhibited at a volatile fatty acid (VFA) concentration of 30,000mgL-1 at OLR of 4.0gVSL-1d-1 in the absence of TEs. Contrary to the failed digesters, a stable performance was achieved in the TEs added digesters. High methane yield (approximately 465.4mLCH4g-1VSadded) was obtained, and no significant accumulation of VFA was observed in the TEs added digesters at OLR of 1.0-5.0gVSL-1d-1 and HRT of 40days. These findings strongly indicated that the addition of TEs has an important impact on the operation stability of AD of FW.

TidsskriftBioresource Technology
Sider (fra-til)297-305
Antal sider9
StatusUdgivet - 1 feb. 2015
Eksternt udgivetJa

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