Vol. 4, Issue 3 (2019)
Managing water resources is an essential dimension of sustainable development. This study aims to provide an effective practice for domestic wastewater treatment by designing eco-friendly floating-islands. The method utilizes the phytoremediation macrophytes Vetiver zizanioides, Canna indica and Typha latifolia. In the absence of macrophytes, water quality deteriorated, particularly in terms of dissolved oxygen (from 5.6mg/L to 2.4mg/L) and odour. Canna grew better at higher nutrient levels and showed greater ability for acclimatization; Vetiver grew more persistently, though needed acclimatization period; Typha was more versatile; having the three together in a single tank did not show any observed synergistic effect. Microbial community studies based on 16SrRNA, to identify wastewater remediation associated microbes, confirmed synergism, with the correspondence between the changes in the physico-chemical parameters and the changes in microbial communities. The present findings while corroborating earlier findings, open ways to further findings and more efficient applications of phytoremediation for domestic wastewater.
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