摘要
水热预处理泔脚废物,测定生物化学甲烷势（BMP）,研究废物脱油、水解和消化性能的变化.结果表明,预处理加速废物的溶解和有机物的水解.随着反应温度升高,产物pH降低,SCOD和VFA浓度显著升高.150℃、60 min预处理后,可浮油含量增加并达到较好的分离效果,消化过程在4-6 d内完成,降解速率提高1倍.170℃预处理后4 d生物气产量最高,继续提高温度会降低产物甲烷势.能量衡算分析表明,优化预处理能耗合理.
Canteen waste was hydrothermal pretreated to investigate the characters of degreasing, hydrolysis and digestibility by biochemical methane assays. Liquidization and hydrolysis were enhanced in hydrothermal pretreatment, pH of hydrolysate decreased, and SCOD and VFA increased significantly followed by increasing hydrothermal temperature. Floatable grease increased to appropriate ratio for removal, and digestion process completed in 4 days to 6 days with double degradation rate after pretreatment at 150℃ for 60 minutes. The 4-day incubation biogas yield was maximum after pretreatment at 170℃, and the methane potential, however, was decreased at higher pretreatment temperature. Energy consumption of optimized pretreatment was recoverable with energy balance analysis.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2009年第5期1551-1555,共5页
Environmental Science
基金
国家高技术研究发展计划(863)项目(2006AA10Z422
2007AA06Z350)
关键词
泔脚废物
水热液化
厌氧消化
生化甲烷势
能量衡算
canteen waste
hydrothermal liquidization
anaerobic digestion
biochemical methane potential
energy balance
