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首页> 外文期刊>Waste Management >Recovery of energy from Taro (Colocasia esculenta) with solid-feed anaerobic digesters (SOFADs)
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Recovery of energy from Taro (Colocasia esculenta) with solid-feed anaerobic digesters (SOFADs)

机译：使用固体饲料厌氧消化器（SOFAD）从芋头（Colocasia esculenta）中回收能量

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We present studies on solid-feed anaerobic digesters (SOFADs) in which chopped Colocasia esculenta was fed without any other pre-treatment, in an attempt to develop an efficient means of utilizing the semi-aquatic weed that is otherwise an environmental nuisance.rnTwo types of SOFADs were studied. The first type had a single vessel with two compartments. The lower portion of the digester, 25% of the total volume, was separated from the upper by a perforated PVC disk. The weed was charged from the top and inoculated with anaerobically digested cow dung-water slurry. The fermentation of the weed in the digester led to the formation of volatile fatty acids (VFAs) plus some biogas. The bioleachate, rich in the VFAs, passed through the perforated PVC disk and was collected in the lower compartment of the digester. The other type of digesters, referred to as anaerobic multi-phase high-solids digesters (AMHDs), had the same type of compartmentalized digester unit as the first type and an additional methaniser unit. Up-flow anaerobic filters (UAFs) were used as methaniser units, which converted the bioleachate into combustible biogas consisting of ～60% methane.rnAll SOFADs developed a consistent performance in terms of biogas yield within 20 weeks from the start. Among the two types of digesters studied, the AMHDs were found to perform better with a twofold increase in biogas yield compared to the first type of digesters.
机译：我们目前对固体饲料厌氧消化器（SOFAD）进行研究，在其中不使用任何其他预处理就饲喂切碎的香芋（Colocasia esculenta），以试图开发一种有效利用半水草的方法，否则会给环境带来麻烦。对SOFAD进行了研究。第一类具有带有两个隔室的单个容器。消化池的下部（占总容积的25％）通过穿孔的PVC盘与上部分离。从顶部装入杂草，并用厌氧消化的牛粪便水进行接种。消化池中杂草的发酵导致形成挥发性脂肪酸（VFA）和一些沼气。富含VFA的生物浸出液通过穿孔的PVC盘，并收集在蒸煮器的下部隔室中。另一种类型的消化池，称为厌氧多相高固体消化池（AMHD），具有与第一种类型相同的分区消化池单元，并带有一个额外的甲烷化池单元。上流厌氧滤池（UAFs）被用作甲烷化器单元，将生物渗滤液转化为可燃气体，其中甲烷含量约60％。从开始到20周内，所有SOFAD的沼气产量均表现出一致的性能。在研究的两种类型的沼气池中，与第一类沼气池相比，发现AMHD具有更好的性能，沼气产量提高了两倍。

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