Water | |
Effectiveness of Domestic Wastewater Treatment Using a Bio-Hedge Water Hyacinth Wetland System | |
Alireza Valipour1  Venkatraman Kalyan Raman3  Young-Ho Ahn1  Michael O𠆝riscoll2  | |
[1]Department of Civil Engineering, Yeungnam University, Gyungsan 712-749, Korea | |
[2] E-Mail: | |
[3]Department of Civil Engineering, Yeungnam University, Gyungsan 712-749, Korea | |
[4] E-Mail | |
[5]R. D. Aga Research Technology Innovation Centre, Thermax Limited, Pune 411 019, India | |
[6] E-Mail: | |
关键词: attached microbial growth; domestic wastewater; on-site treatment; phytoremediation; water hyacinth system; | |
DOI : 10.3390/w7010329 | |
来源: mdpi | |
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【 摘 要 】
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 m2/m3. 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 × 107 cfu/cm2) and plant roots (3.12 × 104 cfu/cm) were isolated and identified (a total of 23 strains). The capital cost was pre-estimated for 1 m3/d wastewater at 78 US$/m3inflow and 465 US$/kg BOD5 removed. This process is a suitable ecotechnology due to improved biofilm formation, reduced footprint, energy savings, and increased quality effluent.
【 授权许可】
CC BY
© 2015 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
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