摘要
提出了异养 电极 生物膜联合反应器脱除地下水中硝酸盐的工艺 ,该反应器以异养反硝化为主 ,通过电化学段脱除异养段后水中残留的甲醇或硝酸盐、亚硝酸盐氮 .进水中碳氮比 (质量比 )从 2 2— 2 9,都可保证出水中既无亚硝酸盐积累现象 ,也无残留的甲醇 ,但甲醇略为过量时可提高反应器的处理能力 .2 4℃时处理硝酸盐氮浓度 40mg L的进水 ,反应器最大脱硝负荷为 47g (m3 ·h) .
A combined heterotrophy electrode biofilm reactor was developed for nitrate removal from groundwater It removed nitrate mainly in its heterotrophicdeniteification part, and then removed the possibly residual nitrate, nitrite and methanol in its electrochemical part At C(methanol)/N ratio from 2 2 to 2 9 ( m/m ), neither nitrite accumulation nor residual mathanol was found in the effluent However, to dose a little excessive methanol in the influent is favorable for increasing the reactor's denitrification capacity In the treatment of an influent of 40mg (NO 3 N)/L at 24℃, the denitrification capacity of the reactor is 47g (NO 3 N)/(m 3 ·h)
出处
《环境科学学报》
CAS
CSCD
北大核心
2001年第3期257-262,共6页
Acta Scientiae Circumstantiae
基金
国家自然科学基金! (项目批准号 :5 0 0 780 5 2 )
关键词
地下水
脱硝
异养-电极-生物膜反应器
硝酸盐
groundwater
nitrate removal
combined heterotrophy electrode biofilm reactor
