外加碳源强化固定化硝化菌增强型人工湿地的氮去除。
Intensified nitrogen removal in immobilized nitrifier enhanced constructed wetlands with external carbon addition.
机构信息
College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China; Department of Environmental Health Sciences, University of California, Los Angeles, Los Angeles, CA 90095-1771, United States.
College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China; College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China.
出版信息
Bioresour Technol. 2016 Oct;218:1261-5. doi: 10.1016/j.biortech.2016.06.135. Epub 2016 Jul 2.
Nitrogen removal performance response of twelve constructed wetlands (CWs) to immobilized nitrifier pellets and different influent COD/N ratios (chemical oxygen demand: total nitrogen in influent) were investigated via 7-month experiments. Nitrifier was immobilized on a carrier pellet containing 10% polyvinyl alcohol (PVA), 2.0% sodium alginate (SA) and 2.0% calcium chloride (CaCl2). A batch experiment demonstrated that 73% COD and 85% ammonia nitrogen (NH4-N) were degraded using the pellets with immobilized nitrifier cells. In addition, different carbon source supplement strategies were applied to remove the nitrate (NO3-N) transformed from NH4-N. An increase in COD/N ratio led to increasing reduction in NO3-N. Efficient nitrification and denitrification promoted total nitrogen (TN) removal in immobilized nitrifier biofortified constructed wetlands (INB-CWs). The results suggested that immobilized nitrifier pellets combined with high influent COD/N ratios could effectively improve the nitrogen removal performance in CWs.
采用含 10%聚乙烯醇（PVA）、2.0%海藻酸钠（SA）和 2.0%氯化钙（CaCl2）的载体颗粒固定化硝化菌，通过 7 个月的实验，研究了 12 个人工湿地（CWs）对固定化硝化菌颗粒和不同进水 COD/N 比（进水化学需氧量：总氮）的脱氮性能响应。批处理实验表明，使用固定化硝化菌颗粒可降解 73%的 COD 和 85%的氨氮（NH4-N）。此外，采用不同的碳源补充策略去除由 NH4-N 转化而来的硝酸盐（NO3-N）。COD/N 比的增加导致 NO3-N 的去除率增加。固定化硝化菌强化人工湿地（INB-CWs）中的高效硝化和反硝化促进了总氮（TN）的去除。结果表明，固定化硝化菌颗粒与高进水 COD/N 比相结合，可有效提高 CWs 的脱氮性能。
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