Composting plants should be operated at a high degradation rate in order to lower their capital and operational costs. Initial C/N ratio is one of the most influential factors on the composting process. This study aimed to determine the impacts of initial C/N ratio on operational composting parameters of two‐phase olive mill pomace with separated dairy manure. Five initial C/N ratios ranging from 29.43 to 43.33 were examined using fifteen 100 L cylindrical reactors. The highest decomposition rate was estimated at 0.02 day⁻¹ with the C/N ratio of 34.49. The maximum relative heat generation was obtained with the C/N ratio of 36.07. The C/N ratio of ≅33 reduced the composting cost of process‐based total airflow supplied per dry matter and organic matter loss. The maximum throughput capacity was obtained when the compost blend had the C/N ratio of ≅37.24. It was concluded that operating the composting of two‐phase olive mill waste, separated dairy manure, and straw with the boundary of the initial C/N ratios between 33 and 37 was recommended.

中文翻译：

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初始碳氮比对两相橄榄磨渣，奶牛粪和秸秆堆肥的影响

堆肥厂应以较高的降解率运行，以降低其资本和运营成本。初始C / N比是堆肥过程中最有影响力的因素之一。这项研究的目的是确定初始C / N比对带有分离的牛粪的两阶段橄榄磨房果渣的操作堆肥参数的影响。使用15个100 L圆柱形反应器检测了5个初始C / N比，范围从29.43至43.33。最高分解速率估计为0.02天^-1C / N比为34.49。以36.07的C / N比获得了最大的相对发热。C / N比约为33，可降低每干物质提供的基于工艺的总气流的堆肥成本和有机物质的损失。当堆肥的C / N比约为37.24时，可以获得最大的吞吐能力。得出的结论是，建议在初始C / N比的范围介于33和37之间的情况下对两阶段的橄榄磨废料，分离的乳牛粪和秸秆进行堆肥。