有机负荷对餐厨垃圾单相厌氧发酵的影响  

Effects of Organic Loading Rate on the Single-phase Anaerobic Fermentation from Food Waste

作　　者：孟宪武[1,2] 许晓晖[1] 杨智满[1] 戴萌[1] 郭荣波[1] 

机构地区：[1]中国科学院青岛生物能源与过程研究所,山东青岛266101 [2]中国科学院研究生院,北京100049

出　　处：《安徽农业科学》2011年第25期15567-15569,共3页Journal of Anhui Agricultural Sciences

基　　金：十一五国家科技支撑计划重大项目"特大型养牛场热电肥联产沼气工程"(2008BADC4B06);科技部863计划课题多原料混合发酵(2010AA101604);山东省科技发展计划项目"黄河三角洲秸秆沼气干式发酵"(2008GG20007003)

摘　　要：[目的]为实现餐厨垃圾资源化利用提供依据。[方法]在中试规模条件下,以餐厨垃圾为底物,研究有机负荷对餐厨垃圾单相厌氧发酵的影响。[结果]低有机负荷[0.75~1.25 g/（L.d）]时,发酵过程的pH、氨氮、可溶性化学需氧量SCOD维持相对稳定,提高有机负荷有利于提高沼气产量和产率,而当有机负荷达到一定高度[1.50 g/（L.d）]时,发酵过程的pH下降,氨氮和SCOD含量上升,说明单相厌氧发酵工艺对餐厨垃圾的处理能力较低。餐厨垃圾中的氮含量高,发酵前应调节碳氮比。沼气中甲烷浓度都在50%~75%,不受有机负荷影响。[结论]低有机负荷[0.75~1.25 g/（L.d）]有利于餐厨垃圾单相厌氧发酵。[Objective] The study aimed to realize the eat hutch refuse resources use provides the basis.[Method]The effect of organic loading rate on the single-phase anaerobic fermentation from food waste in pilot scale was studied.[Result]The results showed that pH,ammonia nitrogen and SCOD in the fermentation process remained relatively stable when the organic loading rate was low[0.75-1.25 g/（L·d）].At this time,the increasing of organic loading rate helped to improve biogas production and production rate.When the organic loading rate reached a certain height[1.50 g/（L·d）],pH decreased and ammonia nitrogen and SCOD increased.It suggested that processing capacity of the single-phase anaerobic fermentation for food waste was low.Food waste was rich in nitrogen.C/N should be adjusted before fermentation.Methane concentration was 50%-75%,and not affected by organic loading rate.[Conclusion] Low organic loading [0.75-1.25 g/（L·d）] was beneficial to the single-phase anaerobic fermentation of food waste.

关 键 词：餐厨垃圾 单相厌氧发酵 沼气 

分 类 号：X705[环境科学与工程—环境工程]