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

作者：Zhang Wanqin; Lang Qianqian; Wu Shubiao^*; Li Wei; Bah Hamidou; Dong Renjie

来源：Bioresource Technology, 2014, 156: 63-69.

DOI：10.1016/j.biortech.2014.01.013

• Pig manure
• Anaerobic digestion
• Growth stage
• Kinetic study

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 80 gVS/L) under mesophilic conditions. The maximum methane yields of MM, SNM, GSM and GFM were 354.7, 328.7, 282.4 and 263.5 mL CH4/gVS(added), respectively. Volatile fatty acids/total inorganic carbon (VFA/TIC) ratio increased from 0.10 to 0.89 when loading increased from 40 to 80 gVS/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.

• 出版日期2014-3
• 单位中国农业大学