太阳能耦合两相厌氧发酵模拟过程中温度的优化  

The Optimization of the Temperature in the Process of Simulated Two-phase Anaerobic Fermentation Combined with Solar Energy

作　　者：杨雪梅[1] 洪峰[1] 汪楚乔[1] 李先宁[1] 

机构地区：[1]东南大学能源与环境学院环境科学与工程系,江苏南京210096

出　　处：《中国沼气》2016年第5期7-11,共5页China Biogas

基　　金：十二五"国家科技支撑项目(2013BAJ10B12-02)

摘　　要：文章模拟太阳能耦合两相厌氧发酵实验,在降低外部供热的理念上降低最佳温度,实现节能的基础上又能达到高效产沼的目的。模拟太阳能给两相供热,先用密封瓶确定产酸相的最佳温度,再将之应用在两相的实验装置中,研究产甲烷相温度微量变化对产沼能力的影响情况。单独产酸相实验中,温度设定为20℃,25℃,30℃,35℃和40℃,溶解性COD浓度和VFA均随着温度升高而升高,但是35℃VFA浓度高于40℃,说明40℃在产酸阶段受到了抑制作用,在两相实验中推荐产酸相温度为35℃;两相实验产甲烷相温度设定为35℃,33℃和30℃,从产气效率、累计产气量和甲烷含量几个方面来说35℃明显优于其他两组,说明产甲烷相对温度要求敏感。This research was aimed to simulate the process of two-phase anaerobic fermentation combined with solar energy, from which decreasing the optimum temperature for the idea of reducing external heat supply based on energy-saving pur- pose and simultaneously obtain efficient methane production. Firstly the optimum temperature of acid-producing phase was determined, and then the determined optimum temperature was applied in the two-phase experiment, and the effect of small changes in temperature on biogas production were investigated in the two-phase experiment. The temperature of single acid phase experiment was set to 20, 25, 30, 35 and 40℃, in which the soluble COD concentration and VFA were increased with the increase of temperature , except that the VFA content under 35℃ was higher than that under 40℃, indicating that the acid production was inhibited above the temperature of 40℃, and so the optimum acid production temperature was 35℃. The temperature of the methanogenie phase was set to 35℃, 33℃and 30℃ in the two-phase experiment. From the obtained cumulative gas yield and methane content,the temperature of 35℃ was obviously better than 33℃ and 30℃ ,indi- cating that the methanogenesis was sensitive to temperature variation.

关 键 词：模拟 太阳能 两相厌氧发酵 温度 

分 类 号：TK51[动力工程及工程热物理—热能工程] S216.4[农业科学—农业机械化工程]