摘要
在安徽淮南构建水芹〔Oenanthe javanica(Bl.)DC.〕-绿狐尾藻(Myriophyllum quitense Kunth)人工湿地,研究人工湿地(水力停留时间37 d)对猪场养殖废水的处理效果。结果表明:水芹-绿狐尾藻人工湿地对养殖废水中总氮、总磷和化学需氧量的总去除率分别为96.52%、92.79%和65.27%。试验运行50 d时人工湿地中总氮、总磷、化学需氧量的出水浓度分别为1.96、0.14和39.60 mg·L^(-1),均达到GB 3838-2002的Ⅴ类标准,其中,总磷出水浓度达到Ⅲ类标准。植物吸收对人工湿地中总氮和总磷的去除贡献率分别为19.30%~56.32%和23.38%~97.10%,其中,绿狐尾藻吸收对总氮和总磷的平均去除贡献率分别为49.84%和90.41%,为人工湿地脱氮除磷的主要途径;绿狐尾藻湿地中总氮、总磷和化学需氧量的沿程削减模型以指数削减模型为最佳,公式分别为y=(-10.80+1.30 C_(i0))e(-0.24-0.01 C_(i 0))t、y=(0.97+1.33 C i0)e^(-0.23-0.09 C_(0)t和y=(23.56+0.83 C_(i0))e^(-0.27+0.01 C_(i0))t。采用上述模型对绿狐尾藻湿地总氮、总磷和化学需氧量的出水浓度进行预测,在水力停留时间为24 d时各污染物浓度可达到GB 8978—1996的一级标准,在水力停留时间为36 d时各污染物浓度均可达到GB 3838—2002的Ⅴ类标准。综上所述,通过经济湿地(种植水芹)与生态湿地(种植绿狐尾藻)相结合的模式,完全可以实现对养殖废水的有效处理和达标排放。
Oenanthe javanica(Bl.)DC.-Myriophyllum quitense Kunth constructed wetland was constructed in Huainan City of Anhui Province,and the treatment effect of the constructed wetland(the hydraulic retention time is 37 d)on swine wastewater from pig farm was studied.The results show that the total removal rates of O.javanica-M.quitense constructed wetland to total nitrogen,total phosphorus,and chemical oxygen demand in swine wastewater are 96.52%,92.79%,and 65.27%respectively.The output water concentrations of total nitrogen,total phosphorus,and chemical oxygen demand in the constructed wetland are 1.96,0.14,and 39.60 mg·L^(-1)respectively at 50 d of test operation,which all reach the classⅤstandard of GB 3838-2002,in which,the output water concentration of total phosphorus reaches the classⅢstandard.The removal contribution rates of plant absorption to total nitrogen and total phosphorus in the constructed wetland are 19.30%-56.32%and 23.38%-97.10%respectively,in which,the average removal contribution rate of M.quitense absorption to total nitrogen and total phosphorus are 49.84%and 90.41%respectively,which is the main pathway for nitrogen and phosphorus removal in the constructed wetland;the exponential reduction model is the best reduction model along the way of total nitrogen,total phosphorus,and chemical oxygen demand in M.quitense wetland,and the equations are y=(-10.80+1.30 C_(i0))e^(-0.24-0.01 C_(i0))t,y=(0.97+1.33 C_(i0))e^(-0.23-0.09 C_(i 0))t,and y=(23.56+0.83 C_(i0))e^(-0.27+0.01 C_(i0))t respectively.The output water concentrations of total nitrogen,total phosphorus,and chemical oxygen demand in M.quitense wetland were predicted by using the above model,the concentration of each pollutant can reach the first level standard of GB 8978-1996 at the hydraulic retention time of 24 d,and reach the class V standard of GB 3838-2002 at the hydraulic retention time of 36 d.In conclusion,it is entirely possible to achieve effective treatment and up-to-standard discharge of swine wastewater through the combination of economic wetland(planting O.javanica)and ecological wetland(planting M.quitense).
作者
谢陈
李希
何兴兵
徐英华
贾中政
李裕元
王杰
吴金水
XIE Chen;LI Xi;HE Xingbing;XU Yinghua;JIA Zhongzheng;LI Yuyuan;WANG Jie;WU Jinshui(College of Biology and Environmental Sciences,Jishou University,Jishou 416000,China;Key Laboratory of Agro-ecological Processes in Subtropical Region,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China;University of Chinese Academy of Sciences,Beijing 100049,China;Henan Institute of Science and Technology,Xinxiang 453003,China;Anhui Runhang Agricultural Science and Technology Development Co.,Ltd.,Huainan 232100,China)
出处
《植物资源与环境学报》
CAS
CSCD
北大核心
2024年第1期26-34,共9页
Journal of Plant Resources and Environment
基金
国家自然科学基金项目(42077215)
湖南省自然科学基金项目(2021JJ30765)。
关键词
养殖废水
水芹
绿狐尾藻
人工湿地
削减模型
模型预测
swine wastewater
Oenanthe javanica(Bl.)DC.
Myriophyllum quitense Kunth
constructed wetland
reduction model
model prediction
