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垃圾石灰和中药渣改良剂对绿色垃圾堆肥过程中物理、化学和微生物特性的影响。

Effects of waste lime and Chinese medicinal herbal residue amendments on physical, chemical, and microbial properties during green waste composting.

机构信息

College of Forestry, Beijing Forestry University, P.O. Box 111, Beijing, 100083, People's Republic of China.

出版信息

Environ Sci Pollut Res Int. 2018 Nov;25(31):31381-31395. doi: 10.1007/s11356-018-3085-9. Epub 2018 Sep 8.

Abstract

Traditional composting is time-consuming and often results in a low-quality product. The objective of this study was to determine the effects of waste lime (WL; at 0, 2.5, and 3.5%) and/or Chinese medicinal herbal residues (CMHRs; at 0, 10, and 20%) as amendments on the two-stage composting of green waste (GW). The combination of WL and CMHRs improved compost particle-size distribution and pH, decreased nitrogen loss, and increased cation exchange capacity (CEC), nutrient content, and microbial numbers. The combination of WL and CMHRs also accelerated organic matter humification and lignocellulose degradation and therefore increased the germination index of the final compost. Relative to the non-amended compost, the optimal amendment (2.5% WL and 20% CMHRs) increased the percentage of particles of ideal size from 23.8 to 66.9%, the pH from 6.69 to 7.17, the CEC from 52 to 169 cmol/kg, the humic acid to fulvic acid ratio from 1.32 to 2.49, the hemicellulose degradation rate from 42 to 87%, and the cellulose degradation rate from 20 to 61%. The treatment with addition of 2.5% WL and 20% CMHRs to GW required only 21 days to generate the highest quality compost product.

摘要

传统堆肥耗时且通常导致低质量产品。本研究旨在确定废石灰(WL;0、2.5 和 3.5%)和/或中草药渣(CMHR;0、10 和 20%)作为改良剂对绿废物(GW)两段式堆肥的影响。WL 和 CMHR 的组合改善了堆肥的颗粒大小分布和 pH 值,降低了氮素损失,增加了阳离子交换容量(CEC)、养分含量和微生物数量。WL 和 CMHR 的组合还加速了有机质腐殖化和木质纤维素降解,从而提高了最终堆肥的发芽指数。与未改良的堆肥相比,最佳改良剂(2.5%WL 和 20%CMHR)将理想粒径的颗粒百分比从 23.8%提高到 66.9%,pH 值从 6.69 提高到 7.17,CEC 从 52 提高到 169 cmol/kg,腐殖酸与富里酸的比例从 1.32 提高到 2.49,半纤维素降解率从 42%提高到 87%,纤维素降解率从 20%提高到 61%。GW 添加 2.5%WL 和 20%CMHR 的处理仅需 21 天即可生成质量最高的堆肥产品。

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