复合人工湿地处理低浓度畜禽养殖废水的净化效果

刘长娥; 周胜; 孙会峰; 张继宁; 陈桂发

文章摘要

刘长娥,周胜,孙会峰,张继宁,陈桂发.复合人工湿地处理低浓度畜禽养殖废水的净化效果[J].农业环境科学学报,2017,36(7):1416-1424.

复合人工湿地处理低浓度畜禽养殖废水的净化效果

Purification performance of combined constructed wetlands on livestock wastewater with low concentration of pollutants

投稿时间：2017-01-20

DOI：10.11654/jaes.2017-0112

中文关键词: 复合人工湿地畜禽养殖废水去除速度去除率

英文关键词: combined constructed wetland livestock wastewater removal rate removal efficiency

基金项目:上海市科委基础研究重点项目（12JC1407900）；上海市科技兴农重点攻关项目（沪农科攻字（2016）第6-3-1号）

作者	单位	E-mail
刘长娥	上海市农业科学院, 上海 201403
周胜	上海市农业科学院, 上海 201403 上海低碳农业工程技术研究中心, 上海 201415	zhous@263.net
孙会峰	上海市农业科学院, 上海 201403 上海低碳农业工程技术研究中心, 上海 201415
张继宁	上海市农业科学院, 上海 201403 上海低碳农业工程技术研究中心, 上海 201415
陈桂发	上海市农业科学院, 上海 201403 上海低碳农业工程技术研究中心, 上海 201415

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中文摘要:

为了解人工湿地对低浓度畜禽养殖废水的去除速度与净化效果，采用4级复合人工湿地以间歇进水的方式处理低浓度猪场废水，监测不同时期各级湿地进出水中TN、TP、NH₄⁺-N、COD_Cr等污染物指标浓度的变化。结果表明，复合人工湿地进水中TN、TP、NH₄⁺-N、COD_Cr年平均初始浓度分别为41.6、8.4、21.4、253.9 mg·L^-1，去除率分别为94.66%、79.36%、91.04%、32.32%。其中1级湿地（芦苇-砾石垂直渗透流）对TN、TP和COD_Cr去除速度较快，分别为2.9、0.6、7.5 g·m^-2·d^-1；2级湿地（芦苇-沸石垂直渗透流）对NH₄⁺-N去除速度较快，为1.8 g·m^-2·d^-1；3级湿地（芦苇-砾石水平潜流）和4级湿地（稻田水平表面流）对污染物的去除速度较低，对TN、TP、NH₄⁺-N的去除速度均小于0.4 g·m^-2·d^-1，对COD_Cr的去除速度小于2.3 g·m^-2·d^-1。污染物去除率受季节温度变化的影响较小。

英文摘要:

In order to evaluate the removal rate and efficiency of livestock wastewater with low concentration of pollutants in constructed wetlands,four-stage combined constructed wetlands were used to purify piggery wastewater with low concentration of pollutants under intermittent influent.The variations of TN,TP,NH₄⁺-N,and COD_Cr in different stages of the wetlands were monitored during spring,summer,autumn,and winter.The annual average concentrations of TN,TP,NH₄⁺-N,and COD_Cr in the influent were 41.6,8.4,21.4,and 253.9 mg·L^-1,respectively,and the removal efficiencies of these pollutants were 94.66%,79.36%,91.04%,and 32.32%,respectively.In addition,the first stage of the wetlands (reed-gravel vertical seepage flow) had higher rates for removing TN,TP,and COD_Cr,which were 2.9,0.6,and 7.5 g·m^-2·d^-1,respectively.The second stage of the wetlands (reed-zeolite vertical seepage flow) showed a high removal rate for NH₄⁺-N,which was 1.8 g·m^-2·d^-1.However,the removal rates of pollutants in the third stage (reed-gravel horizontal undercurrent) and the fourth stage (rice-soil surface flow) of the wetlands were lower.The removal rates of TN,TP,and NH₄⁺-N were all less than 0.4g·m^-2·d^-1,whereas that of COD_Cr was less than 2.3 g·m^-2·d^-1.Season and temperature had little influence on the removal rates of most of the studied pollutants.

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