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Evaluation of humic substances during co-composting of sewage sludge and corn stalk under different aeration rates

文献类型： 外文期刊

作者： Li, Shuyan 1 ; Li, Danyang 1 ; Li, Jijin 2 ; Li, Guoxue 1 ; Zhang, Bangxi 1 ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent & Re, Beijing 100193, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing 100097, Peoples R China

3.Guizhou Inst Soil & Fertilizer, Guiyang 550006, Guizhou, Peoples R China

关键词： Composting;Humic acid;Sewage sludge;Aeration rate;Maturity

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN：

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收录情况： SCI

摘要： Sewage sludge and corn stalk were co-composted under different aeration rates 0.12 (AR0.12), 0.24 (AR0.24), 0.36 (AR0.36) L.kg(-1) DM min(-1), respectively. Transformation of humic substance was evaluated by a series of chemical and spectroscopic methods to reveal compost humification. Results showed that aeration rate could significantly affect compost stability and humification process. Humic acid contents in AR0.24 were significantly higher than those in the other two treatments. The final humic acid/fulvic acid ratios in AR0.12, AR0.24 and AR0.36 treatment were 1.0, 1.9 and 0.8, respectively, corresponding to the final E4/E6 of 4.7, 3.2 and 5.5. Moreover, compost in AR0.24 treatment had a high stability degree due to the low C/N atom ratio and high C/H atom ratio. However, it is noteworthy that composting could not significantly affect the structure of HA in a 35-day period. These results indicate that composting with the aeration rate of 0.24 L.kg(-1) DM min(-1) could accelerated the humification process.

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