Ocean University of China, Qingdao, PR China.
Chemosphere. 2010 Jan;78(5):614-9. doi: 10.1016/j.chemosphere.2009.10.056. Epub 2009 Nov 13.
We examined physicochemical and biological parameters in order to assess their effectiveness as stability and maturity indicators during the forced-aeration composting process of chicken manure mixed with different amounts of sawdust, yielding initial C/N ratios of 12, 18 and 28. The composting mixture with initial C/N ratio of 28 maintained the temperature exceeding 55 degrees C for more than 3d, but the period with temperature above 55 degrees C in the bottom layer of the composting mixtures with initial C/N ratios of 12 and 18 did not meet the requirement of pathogen destruction. The final electrical conductivity in three composting mixtures did not exceed the limit value of 3000microScm(-1) for stable composts. Only the final NH(4)(+)-N of composting mixture with an initial C/N ratio of 28 did not exceed the limit value of 400mgkg(-1) to be considered a stable compost. The NO(3)(-) content in the three composting mixtures increased with the composting time, and a more pronounced increase was found in the composting mixture with an initial C/N ratio of 28. The final specific oxygen uptake rate was 2.38, 2.35, 0.70mgh(-1)g(-1) organic matter for composting mixtures of initial C/N ratio of 12, 18 and 28, respectively, which suggested a higher stability in composting mixture of initial C/N ratio of 28. The final germination index in composting mixture of initial C/N ratio of 28 was 94%; however, the germination indices in the composting mixtures of initial C/N ratio of 12, 18 were never over 80%.
我们检测了理化和生物学参数，以评估它们在鸡粪与不同量木屑强制通风堆肥过程中的有效性，作为稳定性和成熟度的指标，初始 C/N 比分别为 12、18 和 28。初始 C/N 比为 28 的堆肥混合物保持温度超过 55°C 超过 3d，但初始 C/N 比为 12 和 18 的堆肥混合物底层温度超过 55°C 的时间未达到病原体破坏的要求。三种堆肥混合物的最终电导率均未超过稳定堆肥 3000μScm(-1)的限值。只有初始 C/N 比为 28 的堆肥混合物的最终 NH(4)(+)-N 未超过 400mgkg(-1)的限值，才被认为是稳定的堆肥。三种堆肥混合物中的 NO(3)(-)含量随堆肥时间增加而增加，初始 C/N 比为 28 的堆肥混合物中增加更为明显。最终比需氧量分别为 2.38、2.35、0.70mgh(-1)g(-1)有机物，对于初始 C/N 比为 12、18 和 28 的堆肥混合物，这表明初始 C/N 比为 28 的堆肥混合物稳定性更高。初始 C/N 比为 28 的堆肥混合物的最终发芽指数为 94%；然而，初始 C/N 比为 12、18 的堆肥混合物的发芽指数从未超过 80%。
