The anaerobic co-digestion of brewery yeast using granular biomass was studied on the lab, pilot and full-scale. The study shows no adverse effects in the co-digestion of yeast and wastewater in concentrations up to 1.1 (v/v)%. In concentrations up to 2.3% the process is manageable; however, not advisable. In concentrations over 2.8% the process exhibits failure due to the overload with suspended solids. An average specific biogas production of 0.560 m(3)kg(-1) of volatile solids was achieved. Full-scale operation with 0.7% yeast concentration showed a 38.5% increase in the biogas production and a 26.2% increase in the organic loading rate, which resulted in an increase of the biomethane/natural-gas substitute ratio from 10% to 16%. The influence of the yeast addition on the structure of the microbial biomass showed up to 7% dissimilarity in the archaeal and a 32% dissimilarity in the bacterial biomass community, which did not present any difficulties.

译文

在实验室,中试和全规模上研究了使用颗粒状生物质对啤酒酵母的厌氧共消化。该研究表明,在浓度高达1.1 (v/v)% 的酵母和废水的共消化中没有不利影响。在高达2.3% 的浓度下,该过程是可管理的; 然而,不可取。在超过2.8% 的浓度下,由于悬浮固体的过载,该过程表现出失败。实现了0.560 m(3)kg(-1) 挥发性固体的平均比沼气产量。0.7% 酵母浓度的全面操作显示出沼气产量的38.5% 增加和有机负载率的26.2% 增加,这导致生物甲烷/天然气替代率从10% 增加到16%。添加酵母对微生物生物量结构的影响在古细菌中显示出7% 的差异,而在细菌生物量群落中显示出32% 的差异,这没有任何困难。

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