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首页> 外文期刊>Water, Air, and Soil Pollution >Optimization of Petroleum Refinery Wastewater Treatment by Vertical Flow Constructed Wetlands Under Tropical Conditions: Plant Species Selection and Polishing by a Horizontal Flow Constructed Wetland
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Optimization of Petroleum Refinery Wastewater Treatment by Vertical Flow Constructed Wetlands Under Tropical Conditions: Plant Species Selection and Polishing by a Horizontal Flow Constructed Wetland

机译：热带条件下垂直流人工湿地对炼油厂废水的优化：植物种类的选择和水平流人工湿地的抛光

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Typha latifolia-planted vertical subsurface flow constructed wetlands (VSSF CWs) can be used to treat petroleum refinery wastewater. This study evaluated if the removal efficiency of VSSF CWs can be improved by changing the plant species or coupling horizontal subsurface flow constructed wetlands (HSSF CWs) to the VSSF CW systems. The VSSF CWs had a removal efficiency of 76% for biological oxygen demand (BOD5), 73% for chemical oxygen demand (COD), 70% for ammonium-N (NH4+-N), 68% for nitrate-N (NO3--N), 49% for phosphate (PO43--P), 68% for total suspended solids (TSS), and 89% for turbidity. The HSSF CWs planted with T. latifolia further reduced the contaminant load of the VSSF CWtreated effluent, giving an additional removal efficiency of 74, 65, 43, 65, 58, 50, and 75% for, respectively, BOD5, COD, NH4+-N, NO3--N, PO43--P, TSS, and turbidity. The combined hybrid CW showed, therefore, an improved effluent quality with overall removal efficiencies of, respectively, 94% for BOD5, 88% for COD, 84% for NH4+-N, 89% for NO3--N, 78% for PO43--P, 85% for TSS, and 97% for turbidity. T. latifolia strived well in the VSSF and HSSF CWs, which may have contributed to the high NH4+-N, NO3--N, and PO43-P removal efficiencies. T. latifolia-planted VSSF CWs showed a higher contaminant removal efficiency compared to the unplanted VSSF CW. T. latifolia is thus a suitable plant species for treatment of secondary refinery wastewater. Also a T. latifolia-planted hybrid CW is a viable alternative for the treatment of secondary refinery wastewater under the prevailing climatic conditions in Nigeria.
机译：香蒲种植的垂直地下流动人工湿地（VSSF CW）可用于处理炼油厂废水。这项研究评估了是否可以通过改变植物种类或将水平地下流人工湿地（HSSF CW）耦合到VSSF CW系统来提高VSSF CW的去除效率。 VSSF CW对生物需氧量（BOD5）的去除效率为76％，对化学需氧量（COD）的去除效率为73％，对铵态氮（NH4 + -N）的去除率为70％，对于硝酸盐氮（NO3-- N），磷酸盐（PO43-P）为49％，总悬浮固体（TSS）为68％，浊度为89％。种植了桔梗的HSSF CW进一步降低了经VSSF CW处理的废水的污染物负荷，分别对BOD5，COD，NH4 +-提供了74％，65％，43％，65％，58％，50％和75％的去除效率。 N，NO3--N，PO43--P，TSS和浊度因此，混合的混合化学废水显示出更高的废水质量，BOD5的总去除效率分别为94％，COD的88％，NH4 + -N的84％，NO3--N的89％，PO43-的78％ -P，TSS为85％，浊度为97％。 T. latifolia在VSSF和HSSF CW中做得很好，这可能有助于提高NH4 + -N，NO3--N和PO43-P的去除效率。与未种植的VSSF CW相比，种植了桔梗的VSSF CW具有更高的污染物去除效率。因此，T。latifolia是处理二级炼油厂废水的合适植物。同样，在尼日利亚盛行的气候条件下，种植了紫草的混合CW是处理二级炼油厂废水的可行替代方案。

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