Vol. 6, Issue 6 (2018)
Qualitative characterization for suitability assessment of residential grey water in terms of water quality index
Author(s): Prarthana P Hazarika, BK Medhi, RK Thakuria, DK Patgiri and Kanku Deka
Abstract: Grey water has attracted global attention as an alternative water source over the last few decades. In India, considering the projected decline in fresh water availability for agriculture to around 70 per cent by 2025, the major challenge before the nation is to increase the country’s capacity to achieve expected food security. Under this water crisis scenario, grey water - an alternate source to supplement the overall water use is the need of hour. To exploit the potential resource of grey water, Water Quality Index based characterization with special reference to key water quality parameters bear immense importance to assess overall suitability of this resource for further reutilization.With 14 key water quality parameters viz. Total Nitrogen, Nitrate, Orthophosphate, Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), pH, EC, Sulphate, Chloride, Carbonate, Bi-carbonate, Fluoride, Alkalinity, Arsenic of grey water collected from 10 different sites, a study was conducted at Assam Agricultural University and their suitability was assessed through evaluation of Water Quality Index (WQI). WQI over the 10 locations ranged from 231.31 to 304.58 with an average value of 260.02 ± 22.71 and received highest contributions from BOD and EC followed by fluoride and nitrate nitrogen. The WQI for all the locations according to their scores decreased from Site 1 to Site 10 following the trend Site 1(304.58), Site 3 (295.95), Site 6 (279.32), Site 7 (273.97), Site 2 (255.47), Site 8 (246.34), Site 4 (243.96), Site 5 (235.93), Site 9 (233.39), and Site 10 (231.31). All the sites fall under unsuitable water category for any use including drinking, fish culture and irrigation signifying the requirement of adequate treatment prior to reuse for irrigational purpose.
Pages: 284-292 | 689 Views 100 Downloads
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How to cite this article:
Prarthana P Hazarika, BK Medhi, RK Thakuria, DK Patgiri, Kanku Deka. Qualitative characterization for suitability assessment of residential grey water in terms of water quality index. Int J Chem Stud 2018;6(6):284-292.
