| 引用本文: | 何顺能,吴文勇,韩玉国,等.基于发光细菌法综合评价人工湿地处理下再生水急性毒性[J].灌溉排水学报,2025,44(7):114-120. |
| HE Shunneng,WU Wenyong,HAN Yuguo,et al.基于发光细菌法综合评价人工湿地处理下再生水急性毒性[J].灌溉排水学报,2025,44(7):114-120. |
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| 摘要: |
| 【目的】探索人工湿地处理对再生水急性毒性的影响。【方法】基于发光细菌法对再生水的急性毒性进行测试，并以毒性参考物质七水硫酸锌的等当量浓度表示再生水急性毒性，对再生水水质及人工湿地处理效果进行评价。【结果】潜流湿地在处理效果上显著优于表流湿地，对水质急性毒性的削减效果较为突出，念坛潜流湿地急性毒性降幅达到16.16%，再生水经过组合湿地处理后，平均发光抑制率显著下降19.31%；安南潜流湿地处理后再生水发光抑制率降低18.55%，最终出水发光抑制率为10.64%，与来水相比下降9.39%。念坛湿地进水、入表流湿地和表流湿地出水的ZnSO4·7H2O当量浓度分别为0.930、0.553 mg/L和0.466 mg/L，安南湿地再生水来水、湿地出水、表流湿地出水和排放口水样ZnSO4·7H2O当量浓度分别为0.535、0.109、0.277 mg/L和0.262 mg/L。湿地处理后，再生水水质处于安全阈值内，其急性毒性当量浓度处于较低水平。【结论】人工湿地可有效降低再生水急性毒性，且潜流湿地处理效果优于表流湿地。 |
| 关键词: 再生水；人工湿地；发光细菌；急性毒性 |
| DOI：10.13522/j.cnki.ggps.2024291 |
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| Effectiveness of constructed wetlands in reducing acute toxicity of reclaimed water |
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HE Shunneng, WU Wenyong, HAN Yuguo, HU Yaqi, MA Meng, JIANG Tingting
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1. Beijing Forestry University, Beijing 100091, China; 2. China Academy of Water Resources and Hydropower Sciences,
Beijing 100048, China; 3. Shihezi University, Shihezi 832099, China
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| Abstract: |
| 【Objective】Constructed wetlands are an effective technology for wastewater treatment. This study experimentally investigates their effectiveness in reducing the acute toxicity of reclaimed water.【Method】The experiment was conducted in two wetlands, one in Niantan and the other in Annan. In both wetlands, the acute toxicity of reclaimed water was evaluated using the luminescent bacteria assay. The effectiveness of the constructed wetlands was assessed by measuring the equivalent concentration of the toxic reference substance zinc sulfate heptahydrate (ZnSO?·7H?O).【Result】Subsurface-flow wetland was found to be more effective than subsurface-flow wetland, particularly in reducing the acute toxicity of reclaimed water. The subsurface-flow wetland in Niantan reduced toxicity levels by 16.16%, and decreased the average luminescence inhibition rate by 19.31%. The subsurface-flow wetland in Annan reduced the inhibition rate by 18.55%, with a final effluent inhibition rate of 10.64%, representing a 9.39% reduction compared to the influent. In the Niantan system, the equivalent concentrations of ZnSO4·7H2O in the influent, surface-flow wetland, and effluent were 0.930, 0.553, and 0.466 mg/L, respectively, while in the Annan system, the concentration of ZnSO4·7H2O in reclaimed water, wetland effluent, surface-flow wetland effluent, and final outlet were 0.535, 0.109, 0.277, and 0.262 mg/L, respectively. After treatment, the reclaimed water quality remained within safe thresholds, with acute toxicity levels considerably low.【Conclusion】Constructed wetlands effectively reduce the acute toxicity of reclaimed water, with subsurface-flow wetlands demonstrating superior performance compared to surface-flow systems. |
| Key words: reclaimed water; artificial wetland; luminescent bacteria; acute toxicity |
