农业环境科学学报2011，Vol.30Issue(3)：564-572,9.
基于碳酸氢钠为碳源的氢自养反硝化去除地下水中硝酸盐研究
Nitrate Removal from Groundwater by Hydrogen Autotrophic Denitrification Using Bicarbonate as Carbon Source
摘要
Abstract
Hydrogen autotrophic denitrification attracts wide attention since it is clean, environmental friendly and economic. In this study,carbon dioxide and bicarbonate were selected as carbon sources. Tests were performed to compare their effectiveness on denitrification under different conditions. The results showed that bicarbonate as the only inorganic carbon source led to faster acclimation, and the stabilization of pH, which was better than that only with carbon dioxide or carbon dioxide combinated with bicarbonate as carbon sources. The concentration of 2 g· L-1 bicarbonate was sufficient for the growth of denitrifying bacteria if only bicarbonate was addedas carbon source. The performance of denitrification increased with higher nitrate load when its concentration was below 135.6 mgN ·L-1. But it would inhibited denitrification with higher nitrate load. The nitrate degradation could be achieved when pH ranged from 6.0～9.0, but the best pH was 7.0～8.0. A lower(＜6.0) or higher(＞9.0) pH resulted in stagnation of denitrification. The best denitrification efficiency(2.83 mg· L-1 h-1) was achieved with a temperature at 35 ℃. The accumulation of nitrite occurred at 15 ℃.关键词
氢自养反硝化/碳酸氧钠/硝酸盐/亚硝酸盐/地下水Key words
hydrogen autotrophic denitrification/ bicarbonate/ nitrate/ nitrite/ ground water分类
资源环境引用本文复制引用
王豫琪,张增强,陈园,沈志红,王珍,何国强..基于碳酸氢钠为碳源的氢自养反硝化去除地下水中硝酸盐研究[J].农业环境科学学报,2011,30(3):564-572,9.基金项目
陕西省攻关项目(2010K01-01) （2010K01-01）
