| 生物陶粒反应器的氢自养反硝化研究 |
| 摘要点击 2046 全文点击 1148 投稿时间：2013-01-20 修订日期：2013-04-01 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 氢自养反硝化 生物陶粒反应器 硝酸氮 去除率 氢气 |
| 英文关键词 hydrogen autotrophic denitrification bio-ceramic reactor nitrate removal rate hydrogen |
|
| 中文摘要 |
| 利用氢自养反硝化生物陶粒反应器处理硝酸盐废水, 探讨了生物陶粒反应器中氢自养反硝化生物脱氮的实现过程. 考察了水力停留时间、进水硝氮负荷、进水pH值、温度、供氢量等因素对反应器脱氮效果的影响. 结果表明,当水力停留时间为24 h和48 h时,反应器对硝酸氮的平均去除率分别达到94.54%和97.47%. 在水力停留时间为5~16 h时,NO3--N去除率随水力停留时间的缩短而降低; 进水NO3--N浓度较低时,NO3--N的降解速率随其浓度的升高而增大,当NO3--N浓度大于110 mg·L-1时,氢自养反硝化反应受到抑制; 中偏碱性环境较酸性或碱性环境更利于反应器对硝酸盐的去除; 反应器有较宽的温度适应范围,最适温度为25~30℃; 当反应器供氢不足时,脱氮效果明显降低,表明了氢自养反硝化菌对氢气利用的专一性. 在整个运行阶段,出水中亚硝酸氮浓度一直保持在较低水平. |
| 英文摘要 |
| Nitrate wastewater is processed in a bio-ceramic reactor based on hydrogen autotrophic denitrification. The implementation procedure of biological denitrification by hydrogen autotrophic denitrification was investigated. The effects of hydraulic retention time, influent nitrate load, influent pH, temperature and the amount of hydrogen were assessed throughout this trial. The results showed that the removal rate of NO3--N was 94.54% and 97.47% when the hydraulic retention time was 24 h and 48 h, respectively. When the hydraulic retention time was in the range of 5-16 h, the removal rate gradually dropped with the shortening of the hydraulic retention time. When the influent NO3--N concentration was low, with the increase in the influent NO3--N concentration, the degradation rate also increased. The denitrification was inhibited when the NO3--N concentration was higher than 110 mg·L-1. Neutral and alkaline environment was more suitable for the reactor. The reactor showed a wide range of temperature adaptation and the optimum temperature of the reactor was from 25 to 30℃. When hydrogen was in short supply, the effect of denitrification was significantly reduced. These results indicated the specificity of hydrogen utilization by the denitrifying bacteria. The effluent nitrite nitrogen concentration was maintained at low levels during the operation. |
|
|
|
