Abstract This study investigated the impact of spent brewery grains and spent mushroom compost on the development of phenanthrene biodegradation in soil. Two aspects were considered: (i) the influence of increasing waste-to-soil ratios (1:10, 1:5, 1:2, 1:1 & 2:1) and (ii) the impact of soil-PAH contact time (1–100 d). Biodegradation was quantified by measuring changes in the lag phase, the fastest rates and extents of mineralization of 14C-phenanthrene, as well as changes in the number of total heterotrophic and phenanthrene degrading bacteria and fungi. The amendment of smaller amounts of the wastes (1:10 & 1:5) resulted in greatest levels of biodegradation. Microbial numbers increased in all of the amended soils but phenanthrene-degrading numbers in most amended soils did not correlate with the rates and extents of 14C-phenanthrene mineralization. This investigation highlighted the value of waste organic materials as nutrient sources to stimulate microbial degradation of contaminants in soil.

中文翻译：

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有机改良剂对土壤中 14C-菲分解代谢发展的影响

摘要 本研究调查了废啤酒谷物和废蘑菇堆肥对土壤中菲生物降解发展的影响。考虑了两个方面：(i) 增加垃圾与土壤的比率（1:10、1:5、1:2、1:1 和 2:1）的影响和 (ii) 土壤-PAH 接触的影响时间（1-100 天）。通过测量滞后期的变化、14C-菲矿化的最快速率和程度以及异养和菲降解细菌和真菌总数的变化来量化生物降解。少量废物（1:10 和 1:5）的修正导致最大程度的生物降解。所有改良土壤中的微生物数量均增加，但大多数改良土壤中的菲降解数量与 14C-菲矿化的速率和程度无关。这项调查强调了废弃有机材料作为营养来源的价值，以刺激土壤中污染物的微生物降解。