菖蒲残体自消纳型人工湿地氮负荷强化去除研究  

Research on Nitrogen Enhanced Removal by Iris Pseudacorus Residual Self-Consumption Constructed Wetlands

作　　者：庄沐凡 何圣兵[1] 刘文锐 ZHUANG Mufan;HE Shengbing;LIU Wenrui(School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;School of Municipal and Environmental Engineering, Jilin Jianzhu University, Changchun 130118, China)

机构地区：[1]上海交通大学环境科学与工程学院,上海200240 [2]吉林建筑大学市政与环境工程学院,吉林长春130118

出　　处：《水处理技术》2019年第1期106-112,共7页Technology of Water Treatment

基　　金：国家重点研发计划资助(2017YFC0506003);国家重大科技专项资助(2017ZX07205003);上海交通大学莙政项目资助(2017-02-08)

摘　　要：针对农业面源硝酸盐含量高而有机碳不足的问题,以湿地植物黄花菖蒲的残体作为外加碳源,探寻其静态腐解规律;在后续的连续流实验中,将适量的植物残体投加于模拟人工湿地中,研究对营养盐去除的强化效果。结果表明,菖蒲残体腐解率平均为75%,菖蒲残体中TOC释放质量平均为21.13 mg/g,释放出的COD/ρ(TN)=13.63,COD/ρ(TP)=49.74,具有作为植物碳源的潜力;将菖蒲残体应用于模拟人工湿地系统中,在COD/ρ(TN)=5、3时,湿地系统TN去除率分别提高了14.05个、9.77个百分点;计算得出菖蒲残体腐解释放出的TOC可以被微生物利用部分约为48.43%。在实际应用中,收割的菖蒲残体可以完全被湿地系统自消纳,强化了对总氮的去除效果。To deal with the common problem in agricultural diffused pollution, that nitrate content was high while organic carbon content was deficient, Iris pseudacorus residual was conducted as additional carbon source to explore the rule of static decomposition. In subsequent continuous flow experiment, the moderate plant residual was added into simulated constructed wetlands, to study the intensified effect of nutrient removal. The results indicated that the average decomposition rate of Iris pseudacorus was 75%, and the average release amount of TOC was 21.13 mg/g in Iris pseudacorus. The rate of released COD and TN was 13.63 and the rate of released COD and TP was 49.74, which showed Iris pseudacorus residual could be used as potential carbon source. When COD/ρ(TN) in simulated constructed wetlands with Iris pseudacorus residual addition was 5 and 3, the TN removal rate increased by 14.05% and 9.77% respectively. According to calculation, about 48.43% of released TOC could be used by microorganisms. In reality, TOC released by Iris pseudacorus reaped from a constructed wetland can be totally consumed by itself to intensify the TN removal effect.

关 键 词：人工湿地 自消纳 黄花菖蒲 氮负荷 

分 类 号：X703.1[环境科学与工程—环境工程]