摘要
采用室内砂槽实验装置，研究了以可降解餐盒（BMB）为反硝化碳源的生物反应器对于模拟污水中硝酸盐的去除效果及其影响因素。结果表明，以BMB为反硝化碳源的反应器启动时间短。当进水硝酸盐浓度为50mg／L，水温为25℃，水力停留时间为1．15d时，硝酸盐的去除率可达92．6％以上，实验过程中出现亚硝酸盐积累，出水TOC浓度上升，但反应稳定后亚硝酸盐浓度均低于0．1mg／L，且TOC浓度有下降趋势；水力停留时间减小或者进水硝酸盐浓度增加均能使得脱氮效率降低，但当水力停留时间在0．57～1．15d，进水硝酸盐浓度在50～80mg／L范围变化时，反应器硝酸盐去除效率仍能达到80％以上；温度对反硝化作用影响较大，当温度为（20±1）℃时，硝酸盐的去除效率仅为62．0％、74．4％和97．5％．
Through the indoor sand tank experiment, the removal and its influencing factors of nitrate in groundwater were investigated by using the biodegradable meal box （BMB） as the carbon source in laboratory bioreaetor. The results indicated that the startup of the reactor was fast and the nitrate removal efficiency could reach more than 92.6% at 25~C and the hydraulic retention time （HRT） of 1. 15 d when the influent nitrate concentration was 50 mg/L. Although the accumulation of nitrite was observed and the TOC increased in this process, the nitrite was less than 0.1 mg/L and the concentration of TOC got the trend of decreasing in the end. Decreasing HRT or increasing influent nitrate concentration could make the efficiency of denitrification reduce, but the nitrate removal efficiencies were above 80% when the HRT was between 0.57 - 1.15 d, or the nitrate concentration in the influent ranging between 50 -80 mg/L. The impact of temperature on denitrifieation was greater. The nitrate removal efficiencies were only 62.0% ,74.4% and 97.5% , respectively when the tempera- ture was （20±1）℃.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第4期1361-1366,共6页
Chinese Journal of Environmental Engineering
基金
国家"水体污染控制与治理"科技重大专项(2012ZX-07103-004)
关键词
可降解餐盒
砂槽
硝酸盐
生物反硝化
biodegradable meal box （BMB）
sand tank
nitrate
biological denitrification
