高温/中温两相厌氧消化反应中有机酸的变化

为了深入考察高温／中温两相厌氧消化的反应器系统用以处理混合基质时有机酸的变化特性，采用蒸馏－滴 测定挥发有机酸总量，并在系统达到相对稳定时用色质联机确定有机酸的组成及各自含量。研究结果表明，混合基质经高温消化后挥发有机酸含量有所增加，平均在３４６－５５２９ｍｌ／Ｌ，进一步经中国消化且系统达到稳定后其含量平均为４３－４３３ｍｇ／Ｌ，乙酸，丙酸，丁酸和戊酸是进料混合基质和高温消化后基质中主要有机酸种类

Organic Acid Changes in Two-phase Thermophilic/Mesophilic Anaerobic Digestion Process

In order to investigate the changes of organic acids in the two-phase thermophilic / mesophilicanaerobic digestion which was designed for the treatment of mixed substrates from sewage sludge and other high-concentration organic waste,distillation-titration method was adopted for the analyses of volatile organic acids,and GC-MS fortheir composition and concentration.The experimental results showed that the concentration of volatile organic acids increased after the thermophilic digestion of the mixed substrates and d ecreased greatly after their futher digestion in the second mesophilic digester,which were averagely 3346- 5529 mg/L and 43 - 433 mg/L, respectively.Acetic acid,propionic acid, butyric acid and valeric acid are the main acids in the mixed substrates and in the effluent of thermophilic digester.