补充生物质强化水平潜流湿地去除硝酸盐氮研究

针对垂直流-水平流组合人工湿地的水平流段反硝化碳源不足的问题,研究了投加香蒲枯叶对去除硝酸盐氮及出水水质的影响.结果表明,投加经过碱处理和未处理的香蒲枯叶均可以提高水平潜流人工湿地系统对硝酸盐氮的去除速率.在进水硝酸盐氮为50 mg/L时,投加经碱处理的香蒲枯叶后,运行初期的出水硝酸盐氮<7 mg/L,去除速率可达12.18 S/(m~3·d);投加未处理的香蒲枯叶后,运行初期的出水硝酸盐氮<15 mg/L,去除速率为9.21 g/(m~3·d).投加香蒲枯叶后,系统出水总氮的变化趋势与硝酸盐氮的一致.

Adding Biomass for Removal of Nitrate in Horizontal Subsurface Flow Constructed Wetland

Due to poor carbon source for denitrification in the horizontal part of VF/HF constructed wetlands, the influence of adding cattail litter on nitrate removal and the effluent quality was investigated. The results show that adding alkali-treated and untreated cattail litter can improve the removal rate of nitrate in horizontal subsurface flow constructed wetland. At the beginning of the experiment with the influent nitrate nitrogen of 50 mg/L, the effluent nitrate is less than 7 mg/L, its removal rate is 12.18 g/ (m~3·d) after adding alkali-treated cattail litter, and the effluent nitrate is less than 15 mg/L, its removal rate is 9.21 g/(m~3·d) after adding untreated cattail litter. The change trend of the effluent TN is the same as that of nitrate nitrogen after adding cattail litter.