Practice of integrated system of biofilter and constructed wetland in highly polluted surface water treatment

Zhaoqian Jing, Rui He, Yong Hu, Qigui Niu, Shiwei Cao, Yu You Li

研究成果: Article査読

20 被引用数 (Scopus)

抄録

To find an appropriate process for highly polluted surface water, an integrated system with a double-layer biofilter and a constructed wetland was developed. In the biofilter packed with carbon-rich ceramic granules, alternation of nitrification and denitrification was realized resulting in prominent TN (total nitrogen) removal. The constructed wetland was designed in subsurface flow mode with 0.15m depth filled with calcium-rich ceramic granules, which improved phosphorus removal greatly. COD (chemical oxygen demand), TN, NH4+-N and TP (total phosphorus) in the final effluent were mostly below 30, 15, 5 and 0.5mg/L, respectively. The overall phosphorus removal rate in the constructed wetland reached 158.9g/m2year, in which granules' interception and plants' uptake respectively contributed 74.7% and 25.3%. After one year's operation, the calcium content on the surface of the granules in the constructed wetland decreased obviously, whereas phosphorus content increased greatly.

本文言語English
ページ(範囲)462-469
ページ数8
ジャーナルEcological Engineering
75
DOI
出版ステータスPublished - 2015 2 1

ASJC Scopus subject areas

  • Environmental Engineering
  • Nature and Landscape Conservation
  • Management, Monitoring, Policy and Law

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