Acidogenic fermentation of the organic fraction of municipal solid waste and cheese whey for bio-plastic precursors recovery – Effects of process conditions during batch tests
作者： Francesca Girotto , Maria Cristina Lavagnolo , Alberto Pivato , Raffaello Cossu
DOI: 10.1016/J.WASMAN.2017.09.015
关键词:
摘要: Abstract The problem of fossil fuels dependency is being addressed through sustainable bio-fuels and bio-products production worldwide. At the base this bio-based economy there efficient use biomass as non-virgin feedstock. Through acidogenic fermentation, organic waste can be valorised in order to obtain several precursors used for bio-plastic production. Some investigations have been done but still a lack knowledge that must filled before moving effective full scale plants. Acidogenic fermentation batch tests were performed using food (FW) cheese whey (CW) substrates. Effects nine different combinations substrate inoculum (S/I) ratio (2, 4, 6) initial pH (5, 7, 9) investigated metabolites (acetate, butyrate, propionate, valerate, lactate, ethanol) productions. Results showed most abundant deriving from FW butyrate acetate, mainly influenced by S/I (acetate maximum productions 21.4 34.5 g/L, respectively, at S/I = 6). Instead, when dealing with CW, lactate was dominant metabolite significantly correlated (lactate 15.7 g/L pH = 9).
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