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Effects of pH Temperature and Nutrients on Propionate Degradation by a Methanogenic Enrichment Culture

机译:pH温度和营养对产甲烷富集培养物对丙酸酯降解的影响

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摘要

Enrichment cultures were used to determine the conditions promoting fastest methanogenic propionate degradation and growth by adapting the cultures to various physical and chemical conditions and measuring the specific growth rate. We found that the fastest growth of propionate oxidizers occurred at pH 6.8 to 8.5 and 32 to 45°C. Acetate-degrading populations showed narrower optima for fastest growth (pH 6.8 to 7.2 and 37 to 43°C). Enrichment cultures grew as well in minimal medium as in complex medium, although individual microbial populations appeared to require growth factors which could be met by cross-feeding.
机译:通过使培养物适应各种物理和化学条件并测量比生长速率,可以使用富集培养物来确定促进产甲烷性丙酸酯降解和生长最快的条件。我们发现,丙酸氧化剂的最快增长发生在pH 6.8至8.5和32至45°C。醋酸盐降解种群的最佳生长速度较窄(pH 6.8至7.2和37至43°C)。尽管个别微生物种群似乎需要生长因子,但交叉培养可以满足富营养培养物在基本培养基和复杂培养基中的生长。

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