Effect of mixing rates on anaerobic digestion performance of rice straw

被引：0

作者：

Chen J. ^{[1
]}

Li X. ^{[1
]}

Liu Y. ^{[1
]}

Zhu B. ^{[1
]}

Yuan H. ^{[2
]}

Pang Y. ^{[1
]}

机构：

[1] Research Center for Resources and Environment, Beijing University of Chemical Technology

[2] Planting Industry Service Centre of Yanqing County of Beijing Municipality

来源：

Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | 2011年 / 27卷 / SUPPL.2期

关键词：

Anaerobic digestion; Biogas; Mixing rates; Straw;

D O I：

10.3969/j.issn.1002-6819.2011.z2.029

中图分类号：

学科分类号：

摘要：

In order to improve the efficiency of anaerobic digestion of rice straw, the effect of mixing rates on anaerobic digestion performance of rice straw was investigated in batch mode at the mesophilic temperature of 35°C. Three mixing rates of 120, 80 and 40 r/min were used. The results showed that anaerobic digestion performance was influenced significantly by mixing rates. The mixing rate of 120 r/min achieved biogas yield of 451.6 mL/g, which was 20%, and 107% higher than those of the mixing rates of 80 and 40 r/min respectively. The former technical digestion time T 80 (the time to reach 80% of the total production) was 46 days, which was 16 days shorter than that of the mixing rates of 80 r/min, implying the higher digestion efficiency. The proper pH and alkalinity at higher mixing rate enhanced the mass transfer and contributed to the higher biogas yield, more degradation of mass (TS and VS) and the stability of anaerobic system.

引用

页码：144 / 148

页数：4

共 15 条

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