Effectiveness of Domestic Wastewater Treatment Using a Bio-Hedge Water Hyacinth Wetland System

Title
Effectiveness of Domestic Wastewater Treatment Using a Bio-Hedge Water Hyacinth Wetland System
Author(s)
안영호알리레자마란디벤카트라만 라만[벤카트라만 라만]
Keywords
FLOW CONSTRUCTED WETLAND; DISSOLVED SOLIDS TDS; HEAVY-METAL SALTS; EICHHORNIA-CRASSIPES; MICROBIAL COMMUNITY; STABILIZATION PONDS; PERFORMANCE; REMOVAL; PHYTOREMEDIATION; POLLUTANTS
Issue Date
201501
Publisher
MDPI AG
Citation
WATER, v.7, no.1, pp.329 - 347
Abstract
Constructed wetland applications have been limited by a large land requirement and capital investment. This study aimed to improve a shallow pond water hyacinth system by incorporating the advantages of engineered attached microbial growth technique (termed Bio-hedge) for on-site domestic wastewater treatment. A laboratory scale continuous-flow system consists of the mesh type matrix providing an additional biofilm surface area of 54 m(2)/m(3). Following one year of experimentation, the process showed more stability and enhanced performance in removing organic matter and nutrients, compared to traditional water hyacinth (by lowering 33%-67% HRT) and facultative (by lowering 92%-96% HRT) ponds. The wastewater exposed plants revealed a relative growth rate of 1.15% per day, and no anatomical deformities were observed. Plant nutrient level averaged 27 +/- 1.7 and 44 +/- 2.3 mg N/g dry weight, and 5 +/- 1.4 & 9 +/- 1.2 mg P/g dry weight in roots and shoots, respectively. Microorganisms immobilized on Bio-hedge media (4.06 x 10(7) cfu/cm(2)) and plant roots (3.12 x 10(4) cfu/cm) were isolated and identified (a total of 23 strains). The capital cost was pre-estimated for 1 m(3)/d wastewater at 78 US$/m(inflow)(3) and 465 US$/kg BOD5 (removed). This process is a suitable ecotechnology due to improved biofilm formation, reduced footprint, energy savings, and increased quality effluent.
URI
http://hdl.handle.net/YU.REPOSITORY/33696http://dx.doi.org/10.3390/w7010329
ISSN
2073-4441
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공과대학 > 건설시스템공학과 > Articles
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