NaOH預(yù)處理對木薯渣厭氧發(fā)酵產(chǎn)沼氣的影響
發(fā)布時間:2018-08-25 10:17
【摘要】:為研究NaOH預(yù)處理對木薯渣厭氧發(fā)酵產(chǎn)沼氣的影響,采用不同質(zhì)量濃度的NaOH溶液(0.5%、1.0%、2.0%和3.0%)對木薯渣進行浸泡處理,浸泡溫度100℃,持續(xù)時間3 h,以去離子水處理木薯渣作為對照。浸泡處理后殘渣經(jīng)過水洗,在發(fā)酵溫度為35℃、初始pH為7.0條件下,以厭氧污泥為接種物(接種比3∶7,干重計)進行中溫厭氧發(fā)酵。堿預(yù)處理可降低木薯渣中淀粉、纖維素和木質(zhì)素的含量,隨預(yù)處理中NaOH濃度增加,其中木質(zhì)素的去除率依次為60.1%、80.6%、83.6%和86.1%。在厭氧發(fā)酵初期,對照組和堿預(yù)處理后木薯渣殘渣均發(fā)生快速酸化和VFA累積,添加NaOH,調(diào)節(jié)pH有效避免了VFA的持續(xù)累積,發(fā)酵結(jié)束后各反應(yīng)器內(nèi)VFA均低于350 mg/L。NaOH預(yù)處理提高了木薯渣的產(chǎn)氣效率,最佳的NaOH濃度為0.5%,此時沼氣產(chǎn)率為0.427 m~3/kg VS,比對照組提高了68.3%。
[Abstract]:In order to study the effect of NaOH pretreatment on anaerobic fermentation biogas production of cassava dregs, cassava dregs were soaked with NaOH solution (0.5%, 1.0%, 2.0% and 3.0%) at 100 鈩,
本文編號:2202580
[Abstract]:In order to study the effect of NaOH pretreatment on anaerobic fermentation biogas production of cassava dregs, cassava dregs were soaked with NaOH solution (0.5%, 1.0%, 2.0% and 3.0%) at 100 鈩,
本文編號:2202580
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