Dynamic remediation test of polluted river water by Eco-tank system

Jibo Xiao, Huiming Wang, Shuyi Chu*, Ming Hung WONG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Dynamic remediation of river water polluted by domestic sewage using an aquatic plants bed-based Eco-tank system was investigated. Over a period of 18 days, the test demonstrated that average effluent concentrations of chemical oxygen demand (COD), ammonium nitrogen () and total phosphorus (TP) were as low as 17.28, 0.23 and 0.03 mg/L, respectively, under the hydraulic retention time (HRT) of 8.7 d. The average removal efficiencies in terms of COD, and TP could reach 71.95, 97.96 and 97.84%, respectively. The loss of both and TP was mainly ascribed to the uptake by plants. Hydrocotyle leucocephala was effective in promoting the dissolved oxygen (DO) level, while Pistia stratiotes with numerous fibrous roots was significantly effective for the removal of organic compounds. The net photosynthetic rate, stomatal conductance, transpiration rate and biomass accumulation rate of Myriophyllum aquaticum were the highest among all tested plants. Thus, the Eco-tank system could be considered as an alternative approach for the in situ remediation of polluted river water, especially nutrient-laden river water.

Original languageEnglish
Pages (from-to)553-558
Number of pages6
JournalEnvironmental Technology (United Kingdom)
Volume34
Issue number4
DOIs
Publication statusPublished - 2013

Scopus Subject Areas

  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal

User-Defined Keywords

  • dynamic test
  • Eco-tank
  • polluted river water
  • remediation
  • removal efficiency

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