Vol. 11, Special Issue 9 (2022)

Author(s):
Tejas Mangesh Lingavale, Sunil T Patil, Uttam S Kadam and Leena Ajit Pendurkar

Abstract:
Water pollution is one of the concerns in front of developed and developing countries. The deterioration of water quality due to urbanization, industrialization, deforestation, overcrowded population are some of the causes behind contamination which results in increasing water scarcity. It emphasizes need of purification before release of untreated water. It is an opportune time, to refocus on one of the ways to recycle the greywater which water from showers, bathtubs, sinks, kitchen, dishwashers, laundry tubs, and washing machines through reuse of urban wastewater for irrigation and other purposes. For that, Grey water treatment plant was designed for capacity of 24 lit per day. The two PVC candles of diameter 90 mm and height of 1200 mm were used. The first candle contains 15 cm, 30 cm and 45 cm for gravel, charcoal and grit, respectively set from bottom to top in the filtration unit of first column. Also depth of each bed were selected 15 cm, 30 cm and 45 cm for gravel, broken brick and sand, respectively set from bottom to top in filtration unit of second column.The inflow rate varied from 0.04643 lps to 0.008793 lps at 100%, 75%, 50%, 25% open area if controlling valve. Grey water PH value were between 5.6-5.9 while filtered water showed PH values between 5.9-6.5. The EC of the grey water before filtration was in range 160-210 µS/ppm while after flirtation values ranged between 150-180 µS/ppm. The hydraulic retention time increased from 1.83 to 52.53 hours at opening percentage of 100-25.