氨氮浓度对餐厨垃圾两相发酵中产甲烷相的影响  

Effect of Ammonia Concentration on Methanogenic Phase in Two-phase Anaerobic Digestion of Kitchen Waste

作　　者：李政伟[1] 尹小波[1,2] 李强[1,2] 刘莹 宋文芳 周正[1,2] 唐治[1] 邓雅月 

机构地区：[1]农业部沼气科学研究所,四川成都610041 [2]农业部农村可再生能源开发利用重点实验室,四川成都610041 [3]北京市优质农产品产销服务站,北京100101

出　　处：《中国沼气》2016年第1期46-49,共4页China Biogas

基　　金：公益性行业(农业)科研专项(201303099-01)

摘　　要：文章实验采用产酸相中温产甲烷相高温两相发酵工艺,逐步提高系统中有机负荷,以此研究产甲烷相中氨氮浓度的变化规律及其影响。结果表明:氨氮浓度随有机负荷的提高而增大,当有机负荷提高到7.3 g VS·L-1d-1时,氨氮浓度上升到5386 mg·L-1,容积产气率最高达4.1 L·L-1d-1,系统运行良好;当有机负荷达到7.7 g VS·L-1d-1时,氨氮浓度达到6144 mg·L-1,系统出现氨氮抑制;抑制解除后,系统可在有机负荷为3.4 g VS·L-1d-1,氨氮浓度为4586 mg·L-1的条件下稳定运行,容积产气率达到2.5 L·L-1d-1。实验结果还显示:在高浓度氨氮条件下可强化乙酸的代谢,但对丙酸和丁酸的效果不明显。In this experiment,a bench scale two-phase anaerobic digestion（ with acidogenic reactor of 4. 5 L and the methanogenic reactor of 5 L） at high temperature（ 55℃） was used to study the variations of ammonia concentration in the methanogenic reactor under condition of increasing organic loading rate（ OLR） gradually. The results showed that： when OLR was 7. 3 g VS·L- 1d- 1,the ammonia concentration was 5386 mg·L- 1,and the volumetric gas production rate was 4. 1L·L- 1d- 1. Continue to increase OLR to 7. 7 g VS·L- 1d- 1,ammonia nitrogen concentration reached 6144 mg·L- 1,the daily gas production began to decline. When ammonia inhibition occurred in the system,by adding water and stopping feeding,the ammonia concentration decreased to 3822 mg·L- 1. After the disinhibition,the system could operate stably under OLR of 3. 4 g VS·L- 1d- 1with the ammonia nitrogen concentration of 4586 mg·L- 1and the volumetric gas production rate was 2. 5 L·L- 1d- 1. The system recovered well.

关 键 词：氨氮 餐厨垃圾 厌氧发酵 产甲烷相 

分 类 号：X705[环境科学与工程—环境工程] S216.4[农业科学—农业机械化工程]