当前位置: X-MOL 学术Water Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of design and operational conditions on the performance of subsurface flow treatment wetlands: Emerging organic contaminants as indicators
Water Research ( IF 12.8 ) Pub Date : 2017-09-05 , DOI: 10.1016/j.watres.2017.09.004
Stefanie Kahl , Jaime Nivala , Manfred van Afferden , Roland A. Müller , Thorsten Reemtsma

Six pilot-scale subsurface flow treatment wetlands loaded with primary treated municipal wastewater were monitored over one year for classical wastewater parameters and a set of emerging organic compounds (EOCs) serving as process indicators for biodegradation: caffeine, ibuprofen, naproxen, benzotriazole, diclofenac, acesulfame, and carbamazepine. The wetland technologies investigated included conventional horizontal flow, unsaturated vertical flow (single and two-stage), horizontal flow with aeration, vertical flow with aeration, and reciprocating. Treatment efficiency for classical wastewater parameters and EOCs generally increased with increasing design complexity and dissolved oxygen concentrations. The two aerated wetlands and the two-stage vertical flow system showed the highest EOC removal, and the best performance in warm season and most robust performance in the cold season. These three systems performed better than the adjacent conventional WWTP with respect to EOC removal. Acesulfame was observed to be removed (>90%) by intensified wetland systems and with use of a tertiary treatment sand filter during the warm season. Elevated temperature and high oxygen content (aerobic conditions) proved beneficial for EOC removal. For EOCs of moderate to low biodegradability, the co-occurrence of aerobic conditions and low content of readily available carbon appears essential for efficient removal. Such conditions occurred in the aerated systems and with use of a tertiary treatment sand filter.

中文翻译:

设计和操作条件对地下流量处理湿地性能的影响:新兴有机污染物为指标

一年内对六个中试规模的地下流量处理湿地进行了监测,这些湿地中装有经过初步处理的市政废水,以监测经典废水参数,并提供了一组新兴的有机化合物(EOC)作为生物降解的过程指标:咖啡因,布洛芬,萘普生,苯并三唑,双氯芬酸,乙磺胺和卡马西平。研究的湿地技术包括常规水平流,非饱和垂直流(单级和两级),带曝气的水平流,带曝气的垂直流和往复运动。随着设计复杂性和溶解氧浓度的增加,经典废水参数和EOC的处理效率通常会提高。两个充气湿地和两级垂​​直流系统显示出最高的EOC去除率,在温暖的季节表现最佳,在寒冷的季节表现最强劲。就消除EOC而言,这三个系统的性能优于相邻的常规WWTP。在温暖的季节,通过加强湿地系统和使用第三级滤砂器,可以观察到乙磺胺被去除(> 90%)。高温和高含氧量(有氧条件)证明对去除EOC有益。对于中等至低生物降解性的EOC,好氧条件的共同存在和易获得的碳的低含量似乎对于有效去除是必不可少的。这种情况发生在充气系统中,并使用了第三级处理沙滤器。在温暖的季节,通过加强湿地系统和使用第三级滤砂器,可以观察到乙磺胺被去除(> 90%)。高温和高含氧量(有氧条件)证明对去除EOC有益。对于中等至低生物降解性的EOC,好氧条件的共同存在和易获得的碳的低含量似乎对于有效去除是必不可少的。这种情况发生在充气系统中,并使用了第三级处理沙滤器。在温暖的季节,通过加强湿地系统和使用第三级滤砂器,可以观察到乙磺胺被去除(> 90%)。高温和高含氧量(有氧条件)证明对去除EOC有益。对于中等至低生物降解性的EOC,好氧条件的共同存在和易获得的碳的低含量似乎对于有效去除是必不可少的。这种情况发生在充气系统中,并使用了第三级处理沙滤器。有氧条件和容易获得的低碳含量的共同出现看来对于有效去除是必不可少的。这种情况发生在充气系统中,并使用了第三级处理沙滤器。有氧条件和容易获得的低碳含量的共同出现看来对于有效去除是必不可少的。这种情况发生在充气系统中,并使用了第三级处理沙滤器。
更新日期:2017-09-05
down
wechat
bug