Effect of aeration rate, C/N ratio and moisture content on the stability and maturity of compost

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• 作者：Rui Guo^a ; ^b ; ^e ; ^{guorui3030@163.com} ; Guoxue Li^b ; ^{ligx@cau.edn.cn} ; Tao Jiang^b ; ^d ; Frank Schuchardt^c ; Tongbin Chen^a ; Yuanqiu Zhao^b ; Yujun Shen^a ; ^b
• 关键词：Composting ; Aeration rate ; C/N ratio ; Moisture content ; Pig feces
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：May, 2012
• 卷：112
• 期：Complete
• 页码：171-178
• 文件大小：517 K

摘要

To estimate the order of importance of factors affecting the stability and maturation of compost, pig feces and corn stalks were co-composted at different aeration rates (AR: 0.24, 0.48, 0.72 L kg^鈭? dry matter (DM) min^鈭?), C/N ratios (15, 18, 21), and moisture contents (MC: 65%, 70%, 75%). The thermophilic phase with all treatments was long enough to meet sanitation requirements. The oxygen content and N losses increased with increasing AR, but no significant differences were observed between the moderate and high treatments. The compost with the lowest initial C/N ratio was significantly different from the other treatments and had the lowest germination index (53-66%). AR was the main factor influencing compost stability, while the C/N ratio mainly contributed to compost maturity, and the MC had an insignificant effect on the compost quality. The recommended parameters for composting are an AR of 0.48 L kg^鈭? DM min^鈭? and a C/N ratio of 18 with MCs of 65-75%.