科研之友
微信
新浪微博
Facebook
分享链接
摘要
A full scale dry anaerobic digestion (AD) plant of municipal solid waste in Beijing was selected in this study to investigate biogas production performance throughout one year on the basis of the difference between the AD operational temperature and the ambient temperature. Results showed that the operational temperature of this dry AD plant was significantly affected by the ambient temperature, and the average operational temperature of the dry AD in summer was higher than that in other seasons, while the biogas production rate per VS was higher in summer and autumn. The organic loading rate (OLR) of the dry AD plant fluctuated greatly, and the order of the average volume biogas production rate from high to low in different seasons was as follows: Summer ((2.44±0.33) m3·(m3·d)?1)> Spring ((2.31±0.28) m3·(m3·d)?1) > Winter ((2.25± 0.29) m3·(m3·d)?1)> Autumn ((2.10±0.14) m3·(m3·d)?1). Results of correlation analysis showed that the gas production performance of the dry AD was significantly corelated with the operational temperature of the dry AD (p<0.01). The temperature differences in Spring, Summer and Winter were significantly related to the VS biogas production rate (p<0.05), and that in autumn was significantly related to buffer capacity (p<0.05). In a word, it was recommended to strengthen the control of temperature difference in the ambient temperature change period in Spring and Autumn. It was recommended that as far as the improvement of biogas production and operational stability of the full-scale dry AD plant was concerned, the operational temperature of the dry AD plant in the Spring, Autumn, and Winter should be increased by heating and increasing the return ratio, as well as increasing the OLR of the dry AD plant in summer with adequate pH buffer capacity. This study can provide a practical reference for the stable operation and efficient biogas production of engineering-scale dry digestion of municipal solid waste.
-
单位中国科学院; 中国科学院大学
