文章摘要
不同水力负荷下人工湿地对海水养殖尾水污染物的净化特征
Purification characteristics and influencing factors of constructed wetland under different hydraulic loads when treated pollutants of marine aquaculture tailwater
投稿时间:2020-03-03  修订日期:2020-05-21
DOI:
中文关键词: 海水养殖尾水  人工湿地  水力负荷
英文关键词: Mariculture tailwater  Constructed wetland  Hydraulic load
基金项目:中国水产科学研究院院级基本科研业务费专项课题(2019CY01) , 山东省农业重大应用技术创新项目(SD2019YY001)
作者单位E-mail
唐小双 中国水产科学研究院黄海水产研究所 1162274476@qq.com 
崔正国 中国水产科学研究院黄海水产研究所 cuizg@ysfri.ac.cn 
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中文摘要:
      海水养殖尾水的达标排放是海水养殖产业面临的主要问题之一,人工湿地作为一种生态、综合水处理技术可有效去除养殖尾水中的氮磷污染物等污染物,获得适宜的水力负荷条件是该技术推广和应用的前提。构建一套复合垂直流人工湿地处理系统,研究3种水力负荷条件下(V1=0.50、V2=0.19、V3=0.10m/d ),对牙鲆养殖尾水的处理效果。结果表明,3种水力负荷状态下,该系统对于海水养殖尾水中主要污染物的处理效果差异显著。进水中COD的浓度相对较低时,去除率均较低(最高去除率为36.25%),水力负荷状态对COD的去除率影响不明显。水力负荷在0.50m/d时,TN的去除率为49.50%;在0.10m/d时,TN去除率达到85.9%。PO43--P的去除率受到水力负荷的影响较小,最低去除率为77.44%。水力负荷状态会影响系统内氮、磷的浓度变化:在不同水力负荷下,下行池中氮污染物去除率在80%以上;上行池则会在高水力负荷状态下产生NO3--N或者NO2--N的累积,影响出水水质。PO43--P的吸附转化主要发生在下行池的中上层,水力负荷越大,PO43--P的吸附转化就越靠近系统后程。
英文摘要:
      One of the main problems faced by aquaculture industry was discharge of marine aquaculture tailwater. As a kind of ecological and comprehensive water treatment technology, constructed wetland could effectively remove pollutants such as nitrogen and phosphorus in aquaculture tail water. But the appropriate hydraulic load conditions were the premise of the promotion and application of constructed wetland technology. A composite vertical flow constructed wetland treatment system was constructed to study the treatment effect of Paralichthys olivaceus culture tailwater under three hydraulic loading conditions (V1=0.50, V2=0.19, V3=0.10m/d).The results showed that the treatment effect of the system for the main pollutants in the aquaculture tailwater was significantly different under three hydraulic loading conditions. When the concentration of COD in the influent water was relatively low, the removal rate was also low (the highest removal rate was only 36.25%). The effect of hydraulic loading on the removal rate of COD was not obvious. The removal rate of TN was only 49.50%, when the hydraulic load was 0.50m/d, but when the hydraulic load was 0.10m/d, the TN removal rate was 85.9%. The removal rate of PO43--P was less affected by hydraulic load, and the removal rate was more than 77%. The state of hydraulic load would affect the removal effect of nitrogen and phosphorus in the system: In the downstream unit the nitrogen pollutants removal rate was more than 80%; in the upstream unit NO3--N or NO2--N would accumulate under high hydraulic loads. The adsorption and conversion of PO43--P mainly occured in the upper and middle layers of the downstream unit; the larger the hydraulic load, the closer the adsorption and conversion of PO43--P was to the rear of the system.
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