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.
Environ Sci Pollut Res Int. 2018 May;25(13):12398-12406. doi: 10.1007/s11356-018-1450-3. Epub 2018 Feb 19.
The aim of this study was to investigate the gaseous emissions (CH, NO, and NH) and compost quality during the pig manure composting by adding spent mushroom substrate (SMS) as a bulking agent. The control treatment was also studied using corn stalk (CS) as a bulking agent. The experiment was conducted in a pilot scale composting reactor under aerobic condition with the initial C/N ratio of 20. Results showed that bulking agents significantly affected gaseous emissions and compost quality. Using SMS as a bulking agent improved composting efficiency by shortening the time for maturity. SMS increased germination index and humic acid of the final compost (by 13.44 and 41.94%, respectively) compared with CS. Furthermore, composting with SMS as a bulking agent could reduce nitrogen loss, NH, and NO emissions (by 13.57, 35.56, and 46.48%, respectively) compared with the control. SMS slightly increased CH emission about 1.1 times of the CS. However, a 33.95% decrease in the global warming potential of CH and NO was obtained by adding SMS treatment. These results indicate that SMS is a favorable bulking agent for reducing gaseous emissions and increasing compost quality.
本研究旨在探讨添加废弃蘑菇基质（SMS）作为膨松剂进行猪粪堆肥时的气体排放（CH、NO 和 NH）和堆肥质量。还研究了使用玉米秸秆（CS）作为膨松剂的对照处理。实验在有氧条件下的中试规模堆肥反应器中进行，初始 C/N 比为 20。结果表明，膨松剂显著影响气体排放和堆肥质量。使用 SMS 作为膨松剂可通过缩短成熟时间来提高堆肥效率。与 CS 相比，SMS 提高了最终堆肥的发芽指数和腐殖酸（分别提高了 13.44%和 41.94%）。此外，与对照相比，使用 SMS 作为膨松剂可减少氮损失、NH 和 NO 排放（分别减少了 13.57%、35.56%和 46.48%）。SMS 使 CH 排放略有增加，约为 CS 的 1.1 倍。然而，添加 SMS 处理可使 CH 和 NO 的温室效应潜能分别减少 33.95%。这些结果表明，SMS 是一种减少气体排放和提高堆肥质量的有利膨松剂。
