发酵
泥浆
化学
沼气
钾
营养物
糖
食品科学
氮气
磷
单细胞蛋白
体积热力学
肥料
动物科学
农学
生物
环境工程
环境科学
生态学
物理
有机化学
量子力学
作者
Yuanyuan Yi,Jiabao Li,Pan Zhou,Fenglin Jia,Yi‐Chao Chen,Dong Li
标识
DOI:10.1016/j.jenvman.2023.119627
摘要
Single-cell protein (SCP) is a vital supplement for animal protein feed. This study utilized biogas slurry and sugarcane molasses to ferment Nectaromyces rattus for the production of SCP. The optimal batch fermentation conditions were obtained in a 5L jar with a tank pressure of 0.1 MPa, an initial speed of 300 rpm, and an inoculum volume of 30%. The highest cell dry weight concentrations of the fed-batch fermentation without reflux and the fed-batch fermentation with reflux were 46.33 g/L and 29.71 g/L, respectively. The nitrogen conversion rates (47.05% and 44.12%) and the cell yields of total organic carbon (1 g/g and 1.17 g/g) of both fermentation modes were compared. The SCP contained 42.32% amino acids. Its high concentrations of potassium (19859.96 mg/kg) and phosphorus (7310.44 mg/kg) present a novel approach for the extraction of these essential nutrients from biogas slurry. The enrichment of K was related to the H+ efflux and sugar transport.
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