Arrested methanogenesis digestion of high-strength cheese whey and brewery wastewater with carboxylic acid production.
作者： Meltem Urgun-Demirtas , Mark Holtzapple , Haoran Wu , Rachel Dalke , Jesse Mai
DOI: 10.1016/J.BIORTECH.2021.125044
关键词: Pulp and paper industry 、 Methanogenesis 、 Digestion 、 Anaerobic digestion 、 Biomass 、 Wastewater 、 Fatty acid 、 Hydraulic retention time 、 Carboxylic acid 、 Chemistry
摘要: Abstract A new anaerobic digestion process based on arrested methanogenesis (AM) was developed to treat high-strength cheese whey and brewery wastewater with simultaneous carboxylic acid production. This study specifically determined the links between characteristics, microbial community structure, operation of AM digesters at bench scale. The highest total acids concentration (78 g/L) achieved after 15 days under batch condition 40 °C near-neutral pH. Lactate conversion chain-elongated volatile fatty observed. Under fed-batch conditions, productivity 16 g/(Lliq·d) substrate 0.66 g CODdigested/g CODfed hydraulic residence time (HRT) 4 days. Fed-batch biomass recycling resulted in a 2-fold increase VFAs (30 g/L) higher diversity consortia. Experimental results show that highly efficient, robust, productive structure established for sustainable carboxylate production from widely varying wastewaters.
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