Domestic wastewater hydrolysis and lipolysis during start-up in anaerobic digesters and microbial fuel cells at moderate temperatures

Domestic wastewater hydrolysis and lipolysis during start-up in anaerobic digesters and microbial fuel cells at moderate temperatures
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厌氧消化池和微生物燃料电池在中等温度下启动期间的生活废水水解和脂肪分解

DOI:
10.1007/s13762-019-02426-z
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发表时间:
2019
影响因子:
3.1
通讯作者:
Petropoulos E
Petropoulos E
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Petropoulos E

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比较了中温(27.5 ℃和8 ℃)条件下微生物燃料电池(MFC)和厌氧消化(AD)系统启动过程中原水的水解速率。温度下降影响的脂质和碳水化合物的水解速率,但不一定是蛋白质的去除率(温度无关的MFC速率),这是显着影响治疗改变(AD MFC)。MFC在低温下表现出稳健的蛋白水解相比,AD,后者似乎有更高的潜力,在温暖的条件下。脂肪酶活性测定结果表明,在27.5 ℃时,AD和MFC都有水解脂肪的能力,但后者在低温时的水解能力更强。初步群落结构分析表明,从AD切换到MFC使细菌群落改变了15%,其中MFC显示出更高的多样性;但温度下降会使群落改变40%。在MFC设置中似乎受到青睐的关键生物是Geobacteriaceae,可能与该设置的水解能力相关的分类群。
Raw wastewater hydrolysis rates during start-up in microbial fuel cells (MFCs) and anaerobic digestion (AD) systems, seeded with a mesophilic inoculum from a digester, were compared at moderate temperatures (27.5 ℃ and 8 ℃). Temperature drop affected both the lipids and carbohydrates hydrolysis rates but not necessarily the protein removal rates (temperature-independent rates of MFC), which were significantly influenced from treatment alteration (AD to MFC). MFC showed robust proteolysis at low temperature compared to AD; the latter seems to have a higher potential at warmer conditions. A lipases activity assay showed that although at 27.5 ℃ both AD and MFC are likely to hydrolyse lipids, the latter has a higher lipolysis potential at low temperatures. Preliminary community structure analysis showed that the switch from AD to MFC alters the bacterial community by 15% with the MFC showing higher diversification; temperature decrease, though, alters the community by 40%. Key organisms that appear to be favoured at the MFC set-ups areGeobacteriaceae, taxa likely related to the hydrolytic capacity of this set-up.
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