Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
Bioresour Technol. 2017 Dec;245(Pt A):1299-1302. doi: 10.1016/j.biortech.2017.08.177. Epub 2017 Sep 1.
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·kgDMmin, 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 E/E 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 0.24L·kgDMmin could accelerated the humification process.
污泥和玉米秸秆在不同的曝气率下（0.12L·kgDMmin、0.24L·kgDMmin、0.36L·kgDMmin）进行共堆肥。采用一系列化学和光谱学方法评价腐殖质的转化，以揭示堆肥腐殖化过程。结果表明，曝气率可显著影响堆肥的稳定性和腐殖化过程。AR0.24 中的胡敏酸含量明显高于其他两种处理。在 AR0.12、AR0.24 和 AR0.36 处理中，腐殖酸/富里酸的最终比值分别为 1.0、1.9 和 0.8，相应的最终 E/E 值分别为 4.7、3.2 和 5.5。此外，由于较低的 C/N 原子比和较高的 C/H 原子比，AR0.24 处理中的堆肥具有较高的稳定性程度。然而，值得注意的是，在 35 天的时间内，堆肥过程并不能显著影响 HA 的结构。这些结果表明，曝气率为 0.24L·kgDMmin 的堆肥可以加速腐殖化过程。
