摘要
污泥中含有丰富的有机质,为了加速其厌氧消化进程,增加沼气产量,本试验在pH=11.0、P=2.2×105Pa、T=130℃的条件下,对污泥进行30min热消解和30min的超声波预处理,试验结果表明,污泥中的菌胶团结构遭到破坏,固氮酶、脱氢酶、α-淀粉酶等酶的活性得到增强,菌胶团吸附的有机质被释放至溶液中,迅速成为厌氧微生物的营养物被消耗。与对照组相比,可溶解性化学需氧量(SCOD)增加了4.5倍,溶出率提高了350.00%;COD降解率提高了12%,是自然降解率的1.19倍,产氢周期缩短至6.5d,最大产氢率为67.91mL/g(VS),平均产氢率提高到21.6mL/g(VS),是对照组的3.9倍,效果较好。
A bench-scale experiment is conducted to investigate the function of ultrasonic waves in speeding up anaerobic digestion of excessive sludge in terms of hydrogen production. Result indicated the increase of destroyed zoogloea and enhancement of activities of enzymes of nitrogen-fixing, de-hydrogen as well as α-amylase, leading to a decrease of period of hydrogen-producing and an increase of rate of hydrogen-producing.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2008年第5期95-97,115,共4页
Environmental Science & Technology
基金
教育部新世纪优秀人才资助项目(G02-D607001Ⅱ)
关键词
超声波
浓缩污泥
厌氧消化
生物制氢
ultrasonic waves
sludge concentration
anaerobic digestion
biological hydrogen production
