用于生活污水处理的综合人工湿地的性能评估

Performance Evaluation of Integrated Constructed Wetland for Domestic Wastewater Treatment.

作者信息

Sehar Shama, Naz Iffat, Khan Sumera, Naeem Sana, Perveen Irum, Ali Naeem, Ahmed Safia

机构信息

Department of Microbiology, Quaid-i-Azam University, Islamabad 45320, Pakistan.

出版信息

Water Environ Res. 2016 Mar;88(3):280-7. doi: 10.2175/106143016X14504669767814.

DOI:10.2175/106143016X14504669767814

PMID:26931539

Abstract

Simple, budget friendly, laboratory-scale integrated constructed wetland (ICW) was designed to assess domestic wastewater treatment performance at a loading rate of 75 mm/d, planted with native plant species: Veronica-angallis aquatica and compared with non-vegetative control system at various residence times of 4, 8, 12, 16, 20, 24, and 28 days. Results revealed that the vegetated ICW demonstrated superior performance over non-vegetated control: 69.12 vs 17.12%, 67.77 vs 16.04%, 68 vs 16.48%, 71.19 vs 6.56%, 71.54 vs 14.80%, and 72.04 vs 11.41% for total dissolved solids, total suspended solids, phosphates (PO4(-)), sulfate (SO4(-)), nitrate (NO3(-)), and nitrite (NO2(-)), respectively, at 20 days residence times. Reduction in bacterial counts (2.79 × 10(4) CFU/mL) and fecal pathogens (345.5 MPN index/100 mL) was observed in V. aquatica at 20 days residence time. Therefore, the present study highlights not only the presence of vegetation but also appropriate residence time in constructed wetlands for better performances.

摘要

设计了简单且经济实惠的实验室规模综合人工湿地（ICW），以评估在75毫米/天的进水负荷率下处理生活污水的性能，种植了本地植物物种：水苦荬，并在4、8、12、16、20、24和28天的不同停留时间下与无植被对照系统进行比较。结果表明，有植被的ICW表现优于无植被对照：在20天停留时间时，总溶解固体、总悬浮固体、磷酸盐（PO4(-)）、硫酸盐（SO4(-)）、硝酸盐（NO3(-)）和亚硝酸盐（NO2(-)）的去除率分别为69.12%对17.12%、67.77%对16.04%、68%对16.48%、71.19%对6.56%、71.54%对14.80%和72.04%对11.41%。在20天停留时间时，观察到水苦荬中的细菌数量（2.79×10(4) CFU/mL）和粪便病原体（345.5 MPN指数/100 mL）有所减少。因此，本研究不仅强调了植被的存在，还强调了人工湿地中适当的停留时间对于更好性能的重要性。