餐厨垃圾和秸秆混合连续高温甲烷发酵研究

发布时间：2018-04-20 15:07

本文选题：餐厨垃圾 + 秸秆　；参考：《中国环境科学》2017年06期

【摘要】：以餐厨垃圾和玉米秸秆(按TS1:1混合)为原料,开展了200d的连续高温发酵和40d批次产甲烷潜能与动力学实验,进料TS浓度8%,以水力停留时间15,10,8,5d的梯度变化逐级增加容积负荷.连续实验发现,在水利停留时间为5d时达到了系统酸化的极限负荷16gVS/(L·d),通过及时停止进料和投碱控制pH值,一周内有机酸浓度由4.73g/L降低到1.02g/L.当OLR为10gVS/(L·d)时,TS去除率和甲烷转化率分别为55.6%和64.5%.批次实验发现,餐厨垃圾、秸秆和混合原料的产甲烷潜能分别为448,221,268mLCH_4/gVS,最大产甲烷速率常数(K)为63,45,41mLCH_4/(g VS·d).通过连续和批次实验分别获得了混合原料高温甲烷发酵的工艺参数和动力学特征,为餐厨垃圾和秸秆能源化利用提供了一个有效途径.
[Abstract]:200 days of continuous high temperature fermentation and 40 days of methanogenic potential and kinetics experiments were carried out with cooking waste and corn straw (mixed with TS1:1). The TS concentration of feed was 8 and the volume load was increased step by step by the gradient change of HRT 1510 / 8 / 5d. The continuous experiments showed that the limit load of acidification was reached when the water conservancy residence time was 5 days. The concentration of organic acid decreased from 4.73g/L to 1.02 g / L in a week by stopping feed and controlling pH value in time. When OLR is 10gVS/(L d, the removal rate of TS and methane conversion are 55.6% and 64.5%, respectively. The methanogenic potential of kitchen waste, straw and mixed feedstock was 448221268mLCHs / g VSs, respectively, and the maximum methanogenic rate constant (KK) was 63mLCH41mLCH41mLCH4 / g VSD. The technological parameters and kinetic characteristics of high temperature methane fermentation of mixed raw materials were obtained by continuous and batch experiments, which provided an effective way for the energy utilization of kitchen waste and straw.
【作者单位】：中国农业大学工学院(生物质工程中心);中国农业大学国家能源生物燃气高效制备及综合利用技术研发(实验)中心;米兰大学农学院;
【基金】：北京市科技计划项目(D161100006016003,D161100006016001) 科技部中小企业发展专项资金中欧国际合作项目(SQ2013ZOA000017) 国家自然科学基金(51408599)
【分类号】：X712;X799

【相似文献】