摘要:
为完善智能沼气池智能化控制系统, 并对相关智能化沼气池运行提供理论基础, 对智能化沼气池粗纤维含量、pH值、微生物多样性和产气率以及各因素间相关性进行分析研究, 结果表明:相同发酵时间、不同发酵层的沼液粗纤维含量、pH值、微生物的多样性不存在显著差异;相同发酵层、不同发酵时间的沼液粗纤维含量、pH值、微生物多样性存在极显著差异;各发酵时间段内, 最高产气率是616h时间段1.12m3·m-3·d-1, 其次依次为1424h、06h、2448h、4872h时间段;不同发酵时间产气率与粗纤维含量呈显著负相关, 与pH值、Dsh指数、Jsh指数呈显著正相关。
Abstract:
In order to improve the control system of intelligent biogas digester in support of its operation theory, the crude fiber content, pH, microbial diversity and biogas production rate of biogas sludge were analyzed to understand their correlations.The result showed that the crude fiber content, pH and microbial diversity from various layers of biogas sludge performed no significant differences at same fermentation time in the first.Secondly, the crude fiber content, pH and microbial diversity from same layer exhibited significant changes along with fermentation time.Thirdly, in dynamic change of biogas production, the highest rate was detected in fermentation during 6hrs to 16 hrs with 1.12m3·m-3·d-1, followed by gradually depressing in production rate until the 72 hrs of the duration.In addition, the biogas production rate was significantly negative correlation with the content of crude fiber in biogas sludge but positive correlation with the pH, diversity index and homogeneous degrees index.
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