Minimum Requirements for Trace Metals (Iron, Nickel, Cobalt, and Zinc) in Thermophilic and Mesophilic Methane Fermentation from Glucose
Minimum Requirements for Trace Metals (Iron, Nickel, Cobalt, and Zinc) in Thermophilic and Mesophilic Methane Fermentation from Glucose
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DOI：
10.2175/106143010x12780288628895
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发表时间：
2011-04
影响因子：
3.1
通讯作者：
M. Takashima;Kohji Shimada;R. Speece
中科院分区：
文献类型：
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作者：
M. Takashima;Kohji Shimada;R. Speece
研究了高温和中温甲烷发酵葡萄糖对四种必需微量金属的最低要求。这里的最低要求被定义为支持流出物可溶性化学需氧量（COD）为1000 mg/L或更低的量，持续时间为水力停留时间（HRT）的几倍。为此，完全混合的反应器在5天HRT下半连续运行，底物COD为10 g/L。确定为毫克每克COD去除的最低要求分别为0.45，0.049，0.054，和0.24在嗜热系统和0.20，0.0063，0.017，和0.049在嗜温系统的铁，镍，钴，和锌，分别。嗜热系统需要更大量（2.2至7.8倍）的微量金属比嗜温系统，表明更大的同化生物量和/或更少的生物利用度在嗜热条件下。研究结果可为成功的甲烷发酵提供微量金属营养的定量信息。
The minimum requirements for four essential trace metals were examined in both thermophilic and mesophilic methane fermentation of glucose. The minimum requirement here was defined as the amount that supports the effluent soluble chemical oxygen demand (COD) of 1000 mg/L or less for the duration of several times the hydraulic retention time (HRT). For this purpose, completely mixed reactors were run semi‐continuously at 5 days HRT, with 10 g/L substrate COD. The minimum requirements determined as milligrams per gram COD removed were 0.45, 0.049, 0.054, and 0.24 in the thermophilic system and 0.20, 0.0063, 0.017, and 0.049 in the mesophilic system for iron, nickel, cobalt, and zinc, respectively. The thermophilic system required larger amounts (2.2 to 7.8 times) of the trace metals than the mesophilic system, indicating greater assimilation by biomass and/or less bioavailability under thermophilic conditions. The results can give quantitative information on trace metal nutrition for successful methane fermentation.