Abstract
Greywater is the household wastewater which has not been contaminated by toilet discharge water and thus includes wastewater from bathtubs, showers, bathroom washbasins, clothes washing machines, sinks and laundry tubs. Greywater recycling is a component of sustainable green building technology which eases the problem of scanty water supply in residential and commercial buildings. Affordability of such technologies has always been a contentious issue amongst the middle-income group in India. In this paper an attempt has been made to analyse the affordability and potential applications of such systems in Indian context considering the life cycle cost and benefit cost analysis of such technologies which are strong decision-making tools for the feasibility judgment of such technologies. From the analysis it has been observed that the domestically produced system (Case 1) will be having the cost of Rs. 187/ m2 per year as compared to an imported system (Case 2) which will be costing close to Rs. 327/m2 per year. Thus, we can see that by the use of domestic manufactured system the reduction in cost is close to 75%. Also, the Benefit Cost (B-C) ratio of the domestically produced system (Case1) is 2.09 in comparison to the B-C ratio of the imported system (Case 2) which is 1.59.
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