The methanogenic toxicity and anaerobic degradability of potato starch wastewater phenolic amino acids
作者： J.A. Field , G. Lettinga , M. Geurts
DOI: 10.1016/0269-7483(87)90145-5
关键词: Biodegradation 、 Food science 、 Starch 、 Tyrosine 、 Amino acid 、 Biochemistry 、 Anaerobic digestion 、 Methanogenesis 、 Phenols 、 Potato starch 、 Chemistry
摘要: Abstract Potatoes, which are important agricultural feedstocks for the starch industry, contain tyrosine and phenol oxidase. Since l -dopa can be formed from by oxidase, both presumably present in potato wastewaters. The purpose of this study was to evaluate methanogenic toxicity anaerobic degradability these two phenolic amino acids. Tyrosine found negligibly toxic methane bacteria, while caused 40% 50% inhibitions activity at a concentration 327 mg liter−1. occurred only if sludge exposed presence Volatile Fatty Acids (VFA). could minimized maintaining low VFA concentrations media adapting prior exposure. Both were anaerobically degraded CH4; however, degradable after prolonged operation continuously VFA-fed, granular sludge, packed columns. Phenol p-cresol identified as intermediates degradation. m-cresol
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