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Comparison of Reed and Water Lettuce in Constructed Wetlands for Wastewater Treatment

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ABSTRACT: 

In the present study two designs, vertical and horizontal systems, were used and two different plant species, Water Lettuce (Pistia stratiotes) and Reed plant (Phragmites karka), compared for their removal efficiency. The vertical system appeared to be more stable and efficient for almost all the parameters. The vertical system, planted with Water Lettuce, showed percentage removal efficiency for BOD, phosphate and chloride as 82, 95.4, and 51, respectively, whereas turbidity and total suspended solids removal efficiencies were almost the same. However, fecal coliform removal by the Water Lettuce was 98.8% for both designs (vertical and horizontal), showing the ability of the plant to uptake nutrients and release toxins for pathogen disinfection. It appears that the vertical system could be the better option, planted with Water Lettuce, or with both plants in a co-culture environment.
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Keywords: Phragmites karka; Pistia stratiotes L; fecal coliform; horizontal Reed bed; removal efficiency; vertical Reed bed

Document Type: Research Article

Publication date: 01 February 2018

This article was made available online on 21 June 2017 as a Fast Track article with title: "COMPARISON OF REED & WATER LETTUCE IN CONSTRUCTED WETLAND FOR SEWAGE WATER TREATMENT".

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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