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首页> 外文期刊>Journal of industrial microbiology & biotechnology >Formate-removing inoculum dominated by Methanobacterium congolense supports succinate production from crude glycerol fermentation
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Formate-removing inoculum dominated by Methanobacterium congolense supports succinate production from crude glycerol fermentation

机译：除甲酸酯的甲状腺氨基酮支配的甲酸含量支撑琥珀酸盐从粗甘油发酵中产生

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摘要

We developed a formate-removing methanogenic inoculum (FRI) to facilitate succinate production from crude glycerol by Escherichia coli. FRI converted formate to methane, thereby enabling glycerol fermentation without additional electron acceptors under neutral pH. FRI was selectively enriched from sludge from the anaerobic digester of the Seonam sewage treatment plant(Seoul); this process was assessed via Illumina sequencing and scanning electron microscopy imaging. Methanobacterium congolense species occupied only 0.3% of the archaea community in the sludge and was enriched to 99.5% in complete FRI, wherein succinate-degrading bacteria were successfully eliminated. Co-culture with FRI improved glycerol fermentation and yielded 7.3mM succinate from 28.7mM crude glycerol, whereby FRI completely converted formate into methane. This study is the first to demonstrate methane production by M. congolense species, using formate. M. congolense-dominated FRI can serve as a renewable facilitator of waste feedstock fermentation and enable the production of commercially important compounds.
机译：我们开发了一种除去甲状腺原性接种物（Fri），以促进来自大肠杆菌的粗甘油的琥珀酸盐。将甲酸酯转化为甲烷，从而在中性pH下没有额外的电子受体，使甘油发酵。从Seonam污水处理厂（首尔）的厌氧消化器中选择性地从污泥中选择性地富含污泥;通过illumina测序和扫描电子显微镜成像评估该方法。凝结杆菌物种仅占污泥的古群落的0.3％，并在完全的周期中富集99.5％，其中成功消除了琥珀酸盐降解的细菌。与Fri改进的甘油发酵共同培养，得到7.3mm的琥珀酸盐，从28.7mm粗甘油中得到7.3mm琥珀酸盐，从而完全转化为甲烷至甲烷。本研究是第一个使用甲酸盐展示M. Congolense物种的甲烷产量。 M. Congolense-Compated Fri可以作为废料原料发酵的可再生促进剂，并能够生产商业上重要的化合物。

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