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首页> 外文期刊>The Kasetsart Journal >Nitrogen Removal In Duckweed-based Ponds With Effluent Recirculation
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Nitrogen Removal In Duckweed-based Ponds With Effluent Recirculation

机译：浮游生物池塘中含氮再循环的氮去除

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A pilot-scale set of duckweed-based ponds (DWBPs) were set up with effluent recirculation added into the influent line to see what effect this had on solving system failure and enhancing nitrogen removal. The experimental results showed that the optimum performance in terms of nitrogen removal was obtained when the system was operated at a hydraulic retention time (HRT) of 16 days with 100% effluent recirculation. Average removal efficiencies were 72% for total nitrogen (TN), 72% for total kjeldahl nitrogen (TKN) and 73% for ammonia-nitrogen (NH_4-N). During the six-month study period, it was found that all the experimental systems had good stability with no die-off of the duckweed. A nitrogen mass balance study indicated that the three main mechanisms for nitrogen removal in the DWBPs with effluent recirculation were; duckweed uptake, nitrification-denitrification and sedimentation, respectively. The first order constant rates () for TN removal and for NH_4-N were in the range of 0.048-0.074 and 0.047-0.78 per day, respectively.
机译：建立了一个中试规模的浮萍型池塘（DWBP），并将污水再循环添加到进水管线中，以了解这对解决系统故障和提高氮去除率有何影响。实验结果表明，当系统在16％的水力停留时间（HRT）和100％废水再循环的情况下运行时，可获得最佳的脱氮性能。总氮（TN）的平均去除效率为72％，凯氏氮（TKN）的平均去除效率为72％，氨氮（NH_4-N）的平均去除效率为73％。在为期六个月的研究期内，发现所有实验系统都具有良好的稳定性，且没有浮萍的死亡。氮素质量平衡研究表明，在有废水再循环的DWBP中，除氮的三个主要机理是：浮萍的吸收，硝化-反硝化和沉降。每天去除TN和NH_4-N的一阶恒定速率（）分别为0.048-0.074和0.047-0.78。

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