Experimental Investigation of Treatment of Domestic Wastewater Using Multi Soil Layering (MSL) System

Abstract

Soil has been used for the treatment of wastewater from long time ago. Domestic wastewater treatment and disposal is the serious problem our country is facing nowadays. If not treated it further pollutes the rivers. In villages or rural areas where centralized wastewater treatment is not possible because of the scattered houses, a decentralized treatment unit needs to be installed. Multi Soil Layering system is such a decentralized treatment used for the treatment of domestic wastewater. The main objective of this study is to investigate the experimental setup of Multi Soil layering system for the treatment of domestic wastewater. The pre-fabricated acrylic material model of dimension 50cm (L) x 20cm (W) x 60cm (D) was used for the experimental analysis. The potential of the MSL for removal of pollutants from wastewater by changing the operating conditions like flow rate, aeration and non aeration condition was studied. The MSL system proved to be efficient for treatment of domestic wastewater. The study revealed that the flow rate of 0.2 m3/m2/day with aeration condition was efficient for treating domestic wastewater by Multi Soil Layering System. For Flow rate of 0.2 m3/m2/day, the average inlet and outlet ph was observed pH 6.75 and 7.59. The percent removal was as follows: BOD: 87.63%, COD: 87.73%, TSS: 77.12% and TP: 95.45%.