Abstract:Effect of composting pretreatment time on biogas production of the mixture of wheat straw and cattle wastewater was studied. Four treatments with the composting time of 0d (T1), 3d (T2), 6d (T3) and 9d (T4) were designed, and then the composted mixture of wheat straw and cattle wastewater (MS) were used for biogas production respectively. The results indicated that much organic matter of MS were decomposed during composting process and TS (total solid) loss rate of T1, T2 and T3 were 2.63%, 11.46% and 20.00%, respectively. The TS biogas yield of MS was not improved by composting pretreatment and the TS biogas yield of T2, T3 and T4 were 103.01%, 93.96% and 93.68% compared to that of T1. Taking into account the impact of TS loss of WSCW during composting process, the TS biogas yield of T2, T3 and T4 were 100.30%, 83.19% and 77.59% compared to that of T1. After 3 days composting pretreatment, the time for the rate of cumulative biogas production to total biogas production up to 80% was 8 days shorter and the peak of daily biogas yield was 2.65mL/d higher than that of control. However, when the composting pretreatment time was too long, the biogas production rate was decreased. The TS and VS (volatile solid) loss rate of MS were decreased with the increasing composting pretreatment time. The above results showed that, composting pretreatment was not a good way for biogas production improvement of MS, but could improve biogas production rate and shorten start-up time and the composting time of 3 days was acceptable.
陈广银, 鲍习峰, 叶小梅, 常志州, 李玉春, 周立祥. 堆肥预处理对麦秸与奶牛废水混合物厌氧产沼气的影响[J]. 中国环境科学, 2013, 33(1): 111-117.
CHEN Guang-Yin, BAO Xi-Feng, YE Xiao-Mei, CHANG Zhi-Zhou, LI Yu-Chun, ZHOU Li-Xiang. Effect of composting pretreatment on biogas production of the mixture of wheat straw and cattle wastewater.. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(1): 111-117.