Performance of a subsurface-flow constructed wetland in Southern China

编号 zgly0000333341

文献类型 期刊论文

文献题名 Performance of a subsurface-flow constructed wetland in Southern China

作者 SHILei  WANGBao-zhen  CAOXiang-dong  WangJin  LEIZhi-hong  WANGZhi-ren  LIUZheng-ying  LUBing-nan 

作者单位 FacultyofMunicipalandEnvironmentalEngineering.HarbinInstituteofTechnology 

母体文献 Journal of Environmental Sciences（环境科学学报：英文版） 

年卷期 2004,16(3)

页码 476-481

年份 2004 

分类号 X171.1 

关键词 湿地  中国  生态系统  生态环境  环境保护 

文摘内容 The operational performance of a full-scale subsurface-flow constructed wetland, which treated the mixed industrial and domestic wastewater with BOD5/COD mean ratio of 0.33 at Shatian, Shenzhen City was studied. The constructed wetland system consists of screens, sump, pumping station, and primary settling basin, facultative pond, first stage wetland and secondary stage wetland. The designed treatment capacity is 5000 m^3/d, and the actual influent flow is in the range of < 2000 to > 10000 m^3/d. Under normal operational conditions, the final effluent quality well met the National Integrated Wastewater Discharge Standard (GB 8978--1996), with the following parameters(mean values): COD 33.90 mg/L, BOD5 7.65 mg/L, TSS 7.92 mg/L, TN 9.11 mg/L and TP 0.56mg/L. Seven species of plants were selected to grow in the wetland: Reed, Sweetcane flower Silvergrass, Great Bulrush, Powdery Thalia and Canna of three colours. The growing season is a whole year-round. The seasonal discrepancy could be observed and the plants growing in the wetland are vulnerable to lower temperature in winter. The recycling of the effluent in the first stage of the wetland system is an effective measure to improve the performance of the wetland system. The insufficient DO value in the wetland system not only had significant effect on pollutants removal in the wetland, but also was unfavourable to plant growth. The recycling of effluent to the inlet of wetland system and artificial pond to increase DO value of influent to the wetland is key to operate the subsurface constructed wetland steadily and effectively。