东南大学学报（自然科学版）Issue(5)：1000-1004,5.DOI:10.3969/j.issn.1001-0505.2013.05.017
强化供氧对低温域人工湿地脱氮及微环境的影响
Influence of aeration on nitrogen removal effect and microenvironment in constructed wetland at low temperature
摘要
Abstract
Aeration was applied to constructed wetlands at low temperature ( T<15 ℃) after the above-ground part of plants was harvested and the wetlands were covered by plastic films.Then the dissolved oxygen distribution, microorganism amount and contamination removal efficiency were in-vestigated.The results show that aeration should be carried out in the forepart of wetland and the op-timum gas-flow ratio is about 4∶1.Under the optimal aeration condition, the oxygen condition is ob-viously improved.The oxygen concentration is mostly lower than 0.2 mg/L before aeration.Espe-cially in the mid and rear part, it is close to zero.After aeration, the oxygen concentration is gener-ally over 0.4 mg/L and it can even be over 1.2 mg/L in the forepart.The nitrobacteria amount in the forepart of wetland increases one magnitude after aeration.The same occurs for denitrifying bac-teria in the middle and rear part.Moreover, the removal efficiency of COD increases by 15%, and that of TN, NH4+-N increases by 15%to 20%.关键词
人工湿地/低温域/强化供氧/微生物/脱氮效率Key words
constructed wetland/low temperature/aeration/microorganism/nitrogen removal effi-ciency分类
资源环境引用本文复制引用
黄娟,杨思思,郭杨,钟秋爽,王世和,刘洋..强化供氧对低温域人工湿地脱氮及微环境的影响[J].东南大学学报（自然科学版）,2013,(5):1000-1004,5.基金项目
国家自然科学基金资助项目（50909019，51079029）、江苏省优势学科发展基金资助项目（PAPD）． （）
