Wang Qinghong, Feng Chuanping, Zhao Yingxin, Hao Chunbo
Water Resource and Environmental Engineering, China University of Geosciences, Beijing, China.
Bioresour Technol. 2009 Apr;100(7):2223-7. doi: 10.1016/j.biortech.2008.07.057. Epub 2008 Nov 14.
A fiber-based biofilm reactor was developed using a laboratory-scale apparatus for treatment of nitrate-contaminated groundwater. Denitrification bacteria were inoculated by anaerobic sludge from a wastewater treatment plant. Nitrate removal efficiency, nitrite accumulation, COD and pH in the treated water were investigated under various conditions set by several parameters including hydraulic retention times (HRTs) (24, 20, 16, 12, 8, 4 and 2h), influent nitrate loading (around 50, 100 and 150 NO(3)(-)-N mg L(-1)), pH (5, 6, 7, 8, and 9) and ratios of carbon to nitrogen (C/N=3.00, 2.00, 1.50 1.25 and 1.00). The experimental results demonstrated that the optimum reaction parameters were pH 7-7.5,C/N=1.25 and HRT=8h, under which over 99% of NO(3)(-)-N was removed, almost no NO(2)(-)-N accumulated and COD was nearly zero in treated water when the concentration of NO(3)(-)-N was around 100.00 mg L(-1) in influent.
使用实验室规模的装置开发了一种基于纤维的生物膜反应器，用于处理硝酸盐污染的地下水。通过来自废水处理厂的厌氧污泥接种反硝化细菌。在由几个参数设定的各种条件下，研究了处理后水中的硝酸盐去除效率、亚硝酸盐积累、化学需氧量（COD）和pH值，这些参数包括水力停留时间（HRTs）（24、20、16、12、8、4和2小时）、进水硝酸盐负荷（约50、100和150 NO₃⁻-N mg/L）、pH值（5、6、7、8和9）以及碳氮比（C/N = 3.00、2.00、1.50、1.25和1.00）。实验结果表明，最佳反应参数为pH 7 - 7.5、C/N = 1.25和HRT = 8小时，当进水NO₃⁻-N浓度约为100.00 mg/L时，在此条件下处理后水中超过99%的NO₃⁻-N被去除，几乎没有NO₂⁻-N积累，COD几乎为零。
