The role of sulphate reduction in the anaerobic decomposition of carbohydrates, protein and fatty acids

硫酸盐还原在碳水化合物、蛋白质和脂肪酸厌氧分解中的作用

• 批准号: 60550379
• 负责人: MATSUI Saburo
• 金额: $ 1.28万
• 依托单位: Kyoto University (1986)Kanazawa University (1985)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550379/
• 关键词: Anaerobic treatment; Acid formation; Sulphate reduction; Carbohydratis; lactic acid; Propionic acid; Acetic acid; ペプトン

The role of sulphate reduction in the anaerobic decomposition of carbohydrates and protein were investigated. In an anaerobic fluidized bed reactor, anaerobic bacteria of mainly acid formation grew by the feed of the substrate consisted of skimmed-milk with sulphate. Glucose, galactose, lactose and xylose were examined for the anaerobic decomposition. Xylose did not show the decomposition because of no acclimatization of the bacteria to the pentose. other hexoses showed the decomposition. In conclusion, the sulphate reduction does not directly relate to the decomposition of the carbohydrates. In the process of the decomposition, lactic acid, propionic acid and acetic acid are main intermediates. The sulphate reduction occured with the decomposition of propionic acid to acetic acid. The sulphate reduction was an autotrophic reaction using hydrogen as an electron acceptor. Another intermediate of carbohydrate decomposition was ethanol. The sulphate reduction did not relate to the decompo … More sition of ethanol. The sulphate reduction, again, relates to the conversion of propionic acid to acetic acid. Polypeptone was used to investigate the anaerobic decomposition of protein. The fluidized bed was well acclimated with the substrate of polypeptone. The decomposition of polypeptone reached about 75% with 60 min. of the hydraulic retention time. It was not improved with more longer retention time. Comparing to the aerobic decomposition of activated sludge which usually reaches about 95%, the decomposition was low probably due to less anaerobic bacteria which had enzymes of protease. The mixture of amino acids (Glu. ,Val. ,Gly. ,Met., Leu., Phe. and Lys.) which composed polypeptone were used as the substrate of the anaerobic decomposition. All amino acids well decomposed and released propionic acid, acetic acid and ammonia. The sulphate reduction , again, related in the process of the conversion of propionic acid to acetic acid. Although investigation of the decomposition of fatty acids was not conducted due to time limit, the role of sulphate reduction in the decomposition process may be the same as the role in the carbohydrates and organic acids. Less

研究了硫酸盐还原在碳水化合物和蛋白质厌氧分解中的作用。在厌氧床反应器中，以含硫酸盐的脱脂牛奶为基质生长以产酸为主的厌氧菌。对葡萄糖、半乳糖、乳糖和木糖进行了厌氧分解。木糖没有分解，这是因为细菌对戊糖没有驯化。其他的己糖也显示出分解。总而言之，硫酸盐还原与碳水化合物的分解没有直接关系。在分解过程中，乳酸、丙酸和醋酸是主要的中间产物。硫酸盐还原发生在丙酸分解为醋酸的过程中。硫酸盐还原反应是以氢为电子受体的自养反应。碳水化合物分解的另一个中间体是乙醇。硫酸盐还原与分解…无关更多的乙醇。硫酸盐还原也与丙酸转化为醋酸有关。利用聚蛋白内酯对蛋白质的厌氧分解进行了研究。沸腾床与多聚蛋白胨基质具有良好的适应性。60min时，多糖的分解率可达75%左右。的水力滞留时间。保留时间越长，效果越差。活性污泥的好氧分解率一般在95%左右，而活性污泥的分解率较低，这可能是由于厌氧菌中含有较少的蛋白酶所致。氨基酸混合物(Glu.、瓦尔。，Gly.、Met.、Leu.、Phe.和Lys。)以合成的多蛋白内酯作为厌氧分解的底物。所有氨基酸都能很好地分解和释放丙酸、乙酸和氨。在丙酸转化为醋酸的过程中，硫酸盐还原也是相关的。虽然由于时间限制没有对脂肪酸的分解进行研究，但硫酸盐还原在分解过程中的作用可能与碳水化合物和有机酸的作用相同。较少