Potential of Grey Water Recycling in Water Scarce Urban Areas in Bangladesh

Abstract

Constructed wetland, being simple inconstruction and maintenance and operation, is a biological process which intends to interact among media, plants, waste water and microorganisms for a better treatment of grey water from households. The objectives of this study were to perform quantitative analysis of grey water recycling using constructed wetland process (horizontal and vertical flow) and feasibility study of application of recycled water in daily use. It included a residential staff quarter, a residential hostel and a hospital as the subject area. The three different types of water consumption rate in different sectors in these areas and the amount of produced and recycled grey water were studied. The findings are, recycled grey water can be successfully used in several daily use purposes and the production of recycled water is much higher than demand. With the use of recycled water, it can be saved 17.62%,19.22% and 17.71% of total water of the three respective subject areas. Reduction of water bill to some extent and betterment of environment by improving the quality of downstream waste water and reduction in groundwater depletion by less withdrawal of water is also possible.