Treatment of Domestic Waste Water by Rapid Sand Filter for Irrigation Purpose

Domestic Waste water is an immense resource that could find significant applications in regions of water scarcity. The reuse of grey water in certain countries will solve many problems related to water scarcity, and will lead to the saving of financial resources which in turn helps to support the economy so new treatment & technology are needed to be discovered for the treatment of domestic waste water. In this research paper we design a model of rapid sand filter for the treatment of waste water using a low cost adsorbent such as neem leaf powder. the various parameters of grey water will be evaluated as well as the water coming out of the rapid sand filter model will also be analyzed so that comparative study can be done. The working of the model (rapid sand filter) will also be observed by varying the packing of the filter media. Different filter media such as coarse gravel having size 20mm &16.5mm and core segregate having size 6.3mm , fine sand having size 4mm and neem leaf powder & fine sand having size 1mm etc. will be used. Laboratory tests were conducted on these samples (grey water) and they revealed the presence of BOD, TDS, pH hardness, EC etc. whose value varies when compared with that of the parameter for standard irrigation water. We observed that the model of rapid sand filter is, significantly assist in the removal of BOD, COD, TSS, TDS, DO, hardness, EC and will improve the pH quality of the effluent. The purpose of this research paper is to propose some efficient, less expensive and eco friendly filtration technique for grey water treatment for household. Several studies have recommended to reuse the treated grey water which are beneficial to domestics purpose i.e. irrigation, toilet flushing, car washing, constructed wetland etc.