organic acid Biomass 4 fermentation 4 Acetic acid 3 Enzymatic hydrolysis 3 Fermentation 3 Glucose 3 Organic acids 3 biomass 3 cellulose 3 Aldehydes 2 Carbon 2 Enzymes 2 Ethanol 2 Lignin 2 MSWI fly ash 2 Microorganisms 2 Morphology 2 Organic acid 2 Sugar industry 2 Volatile fatty acids 2 acetic acid 2 carbon dioxide 2 dechlorination 2 ethanol 2 fungus 2 hydrolysis 2 lignin 2 pH 2 ultrasound 2