生态浮床处理再生水的主要影响因素研究

摘要

The effects of hydraulic retention time (HRT) and coverage ratio of Ipomoea Aquatica Forsk floating bed and Vetiveria zizanioides floating bed for reclaimed water treatment were studied. The results showed that: ① Effect of HRT on the removal of TN and TP were larger than that of CODCr and NH3-N. Two systems purification effect gradually improved with the increase of HRT. Taken together, HRT should be kept about 3d; ② The change tendency of treatment efficiency were almost the same as the increase of coverage, and coverage ratios has significant influences on the removal of TN and TP. Ideal coverage ratios should be about 45%.%试验研究了水力停留时间（HRT）及浮床覆盖率对分别种植了空心菜和香根草的生态浮床系统处理再生水效果的影响。结果表明：①HRT对TN，TP去除效果影响较大，对CODCr，NH3-N的去除效果影响较小，2种浮床系统随HRT的增加其水质净化效果逐渐提高。综合考虑，HRT应保持在3 d左右；②随覆盖率的增加，2种浮床系统处理效果的变化趋势基本一致，其中对TN，TP的去除效果影响显著。综合分析，2种浮床系统比较理想的浮床覆盖率为45%左右。