羊、鸭、兔粪厌氧消化产沼气潜力与特性

    Biogas production potential and characteristics of manure of sheep, duck and rabbit under anaerobic digestion

    • 摘要: 为弄清羊、鸭、兔粪便厌氧消化产沼气潜力及特性,试验以各新鲜粪便为发酵原料,以自行培养的厌氧污泥为接种物,在(35±1)℃、(25±1)℃和常温(9~19℃)条件下进行了批式厌氧消化试验,研究了各粪便厌氧消化的产气速率与产气量、酸碱度变化、消化料液COD及NH4+-N的去除效率。试验结果显示:(35±1)℃时各原料总固体(TS)产气率为:羊粪0.273 m3/kg,鸭粪0.441 m3/kg,兔粪0.210 m3/kg;(25±1)℃(羊粪为(27±2)℃)时为:羊粪0.206 m3/kg,鸭粪0.359

       

      Abstract: In order to investigate the biogas production potential of sheep manure, duck manure and rabbit manure for anaerobic digestion and their characteristics, taking the three kinds of manure as the digestion material and the self-culture anaerobic sludge as the inoculation substances, under three different temperatures of (35±1)℃, (25±1)℃and normal temperature (9–19℃), the experiments of anaerobic digestion of sequencing batch reactor were conducted. The biogas production rate, biogas yield, variations of pH value and variations of methane concentration with different pH, and the removal efficiency of COD and NH4+-N of wastewater of three kinds of manure were studied. The results showed that at (35±1)℃, biogas production potential of material (TS) was 0.273 m3/kg for sheep manure, 0.441 m3/kg for duck manure, and 0.210 m3/kg for rabbit manure. At (25±1)℃, biogas production potential (TS) of material was 0.206 m3/kg for sheep manure, 0.359 m3/kg for duck manure, and 0.174 m3/kg for rabbit manure. At normal temperature, biogas production potential of material (TS) was 0.082 m3/kg for duck manure, and 0.098 m3/kg for rabbit manure. Three kinds of feedstocks could achieve pH self-balancing at startup of anaerobic fermentation fed with adequate anaerobic sludge. Anaerobic digestion could evidently remove COD of three kinds of manure, but it could not decrease NH4+-N.

       

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