化学预氧化/生物活性炭去除微污染原水中氨氮  

CHEMICAL PREOXIDATION/BIOLOGICAL ACTIVATED CARBON PROCESS FOR AMMONIA-NITROGEN REMOVAL IN MICRO-POLLUTION SOURCE WATER

作　　者：马军[1] 鞠然[1] 刘桂芳 

机构地区：[1]哈尔滨工业大学市政与环境工程学院,黑龙江哈尔滨150090

出　　处：《水处理技术》2005年第10期37-41,共5页Technology of Water Treatment

基　　金：国家"十五"攻关计划"城市水环境关键技术"(2002BA806B04)

摘　　要：以松花江水为研究对象,比较研究了高锰酸盐、高铁酸盐和臭氧三种氧化剂预氧化与生物活性炭(简称BAC)联用对微污染原水中NH4+-N去除效果。试验结果表明:高锰酸盐/生物活性炭(简称P/BAC)、高铁酸盐/生物活性炭(简称F/BAC)、臭氧/生物活性炭(简称O/BAC)三种工艺按硝化能力的强弱排序为:F/BAC>P/BAC>O/BAC。P/BAC、F/BAC对原水的NH4+-N浓度变化表现出较强的适应能力,对NH4+-N的绝对去除量的平均值可达到1.75mg/L、2.20mg/L;NH4+-N的平均去除率为51%和64%。而O/BAC工艺对进水NH4+-N浓度的变化较为敏感,处理效果波动较大;绝对去除量的平均值为0.73mg/L;NH4+-N的平均去除率为21%。在原水NH4+-N浓度变化的较大范围内,三种工艺最后出水中NO2--N浓度都低于进水;在原水NH4+-N浓度突然升高较大时,P/BAC、F/BAC出水中的NO2--N出现少量的积累,而几天后又能恢复稳定运行状态时的低浓度出水。Effectiveness of ammonia-nitrogen removal is compared in different preoxidation/biological activated carbon （BAC） processes with permanganate, ferrate and ozone three kinds of oxidants. Micro-polluted source water is derived from Songhua River. Results of the study show that permanganate/BAC （P/BAC）, ferrate/BAC（F/BAC） and ozone/BAC （O/BAC） exhibit different ammonia removal potential in the order of F/BAC 〉 P/BAC 〉 O/BAC. The average ammonia removals of P/BAC and F/BAC are 51%, 64% respectively. And P/BAC and F/BAC possess good capacities of adapting to variations of initial ammonia concentration. The average ammonia removal of P/BAC and F/BAC can respectively attain to 1.75mg/L and 2.20mg/L whereas for O/BAC, ammonia removal is as low as 0.73mg/L and the average ammonia removal is as low as 21% too. Furthermore, ammonia removal capability of O/BAC is sensitive to initial ammonia concentration, therefore effectiveness of removing ammonia varies to higher extent to that of the other two processes. Additionally, effluent NO2^--N is low for these three processes in high range of initial ammonia concentration. Interestingly, when initial ammonia concentration abruptly increases to higher than average, NO2^--N in P/BAC and F/BAC effluent is a little more than influent NO^2--N for several days and then shift to steady state of low effluent NO2^--N concentration.

关 键 词：化学预氧化 生物活性炭 氨氮 亚硝酸盐氮 硝化反应 

分 类 号：TU991.2[建筑科学—市政工程]