A STUDY ON GREY WATER TREATMENT PROCESSES: A REVIEW

India is facing a water crisis and by 2025 it is estimated that India's population will be suffering from severe water scarcity. Water scarcity leads to problems such as food shortage, decreased economic development, regional water conflicts and environmental degradation and drought problem occur. As the industries are growing day by day the load on effluent treatment and disposal is also increasing. Now the condition is getting worst so new treatment and new techniques are needed to be discovered. This paper presents a review of existing technologies for treatment of grey water. Bioremediation, sand filter and simple technologies have been shown to have limited effect on grey water. GAC (granular activated carbon) low cost adsorbent helps to remove the dye and color pigments. Activated carbon, bark & charcoal filter and Sand filtration technique is the oldest methods for treatment of grey water. Membranes are reported to provide good solid removal. The best methods were observed that combine different types of methods to ensure effective treatment for grey water. Physto-remediation filtration technique is helpful to save the soil nutrients. The treated grey water can be used for non-potable use such as irrigation or gardening toilet flushing, car washing and construction purposes.