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Shubiao Wu

Anaerobic digestion characteristics of pig manures depending on various growth stages and initial substrate concentrations in a scaled pig farm in Southern China

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  • Wanqin Zhang, China Agricultural University
  • ,
  • Qianqian Lang, China Agricultural University
  • ,
  • Shubiao Wu
  • Wei Li, China Agricultural University
  • ,
  • Hamidou Bah, China Agricultural University, Institute Superior of Agronomy and Veterinary
  • ,
  • Renjie Dong, China Agricultural University

The characteristics of anaerobic digestion of pig manure from different growth stages were investigated. According to growth stage, batch experiments were performed using gestating sow manure (GSM), swine nursery with post-weaned piglet manure (SNM), growing fattening manure (GFM) and mixed manure (MM) as substrates at four substrate concentrations (40, 50, 65 and 80gVS/L) under mesophilic conditions. The maximum methane yields of MM, SNM, GSM and GFM were 354.7, 328.7, 282.4 and 263.5mLCH4/gVSadded, respectively. Volatile fatty acids/total inorganic carbon (VFA/TIC) ratio increased from 0.10 to 0.89 when loading increased from 40 to 80gVS/L for GFM. The modified Gompertz model shows a better fit to the experimental results than the first order model with a lower difference between measured and predicted methane yields. The kinetic parameters indicated that the methane production curve on the basis of differences in biodegradability of the pig manure at different growth stages.

OriginalsprogEngelsk
TidsskriftBioresource Technology
Vol/bind156
Sider (fra-til)63-69
Antal sider7
ISSN0960-8524
DOI
StatusUdgivet - 2014
Eksternt udgivetJa

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