醋糟高效厭氧消化體系構建
發(fā)布時間:2018-08-27 13:50
【摘要】:運用高固態(tài)厭氧消化模式,通過提高反應體系均質(zhì)程度和沼液回流等手段,逐步提升物料負荷,對未經(jīng)預處理的醋糟進行厭氧消化處理,成功構建了醋糟高效厭氧消化體系.結果表明,在反應體系物料負荷達到6.15 g·(L·d)~(-1)時表現(xiàn)出最佳的厭氧消化性能,單位干物料產(chǎn)沼氣量為396 m L·g~(-1),單位干物料產(chǎn)甲烷量為211 m L·g~(-1).該物料負荷下半纖維素降解率達到63.66%,是醋糟厭氧消化性能提高的主要原因.纖維素、木質(zhì)素的降解率分別為21.46%、24.43%,較低的降解效率主要是由于木質(zhì)素中的苯環(huán)結構難以降解,并阻礙纖維素酶的水解作用,對纖維素降解產(chǎn)生屏蔽效應.
[Abstract]:By improving the homogenization degree of reaction system and reflux of biogas liquid, the material load was increased step by using the high solid anaerobic digestion model, and the anaerobic digestion system of vinegar lees without pretreatment was successfully constructed. The results showed that the optimum anaerobic digestibility was obtained when the material load of the reaction system reached 6.15 g (L d) ~ (-1). The biogas production per unit dry material was 396mg ~ (-1), and the methane production per unit dry material was 211mg ~ (-1). The degradation rate of hemicellulose reached 63.66 under the material loading, which was the main reason for improving the anaerobic digestibility of vinegar lees. The degradation rates of cellulose and lignin were 21.46% and 24.43 respectively. The low degradation efficiency was mainly due to the difficulty in the degradation of benzene ring structure in lignin and the blocking effect of cellulase hydrolysis.
【作者單位】: 江南大學環(huán)境與土木工程學院;江蘇省環(huán)境厭氧生物技術重點實驗室;
【基金】:國家自然科學基金項目(51678279) 江蘇省厭氧生物技術重點實驗室開放課題項目(JKLAB201606)
【分類號】:X792
本文編號:2207482
[Abstract]:By improving the homogenization degree of reaction system and reflux of biogas liquid, the material load was increased step by using the high solid anaerobic digestion model, and the anaerobic digestion system of vinegar lees without pretreatment was successfully constructed. The results showed that the optimum anaerobic digestibility was obtained when the material load of the reaction system reached 6.15 g (L d) ~ (-1). The biogas production per unit dry material was 396mg ~ (-1), and the methane production per unit dry material was 211mg ~ (-1). The degradation rate of hemicellulose reached 63.66 under the material loading, which was the main reason for improving the anaerobic digestibility of vinegar lees. The degradation rates of cellulose and lignin were 21.46% and 24.43 respectively. The low degradation efficiency was mainly due to the difficulty in the degradation of benzene ring structure in lignin and the blocking effect of cellulase hydrolysis.
【作者單位】: 江南大學環(huán)境與土木工程學院;江蘇省環(huán)境厭氧生物技術重點實驗室;
【基金】:國家自然科學基金項目(51678279) 江蘇省厭氧生物技術重點實驗室開放課題項目(JKLAB201606)
【分類號】:X792
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