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 prefabricated 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 m 3 /m 2 /day with aeration condition was efficient for treating domestic wastewater by Multi Soil Layering System. For Flow rate of 0.2 m 3 /m 2 /day, the average inlet and outlet ph was observed pH 6.75 and 7.59. The percent removal was as follows:

Performance of multi-soil-layering (MSL) urban domestic wastewater treatment system

“…This indicates that the function of intra-granular and inter-granular pores of permeable layers play an important role. This condition is in line with the observations by Deshpande [12] who found that the best TSS elimination is achieved through the filtration process with permeable layers and soil mixture block layers. On average, silica sand could eliminate TSS well at the Q1 and Q2 discharges.…”

“…For the pH parameter, zeolite at Q2 had the highest average pH efficiency enhancement with 5.33%, followed by silica sand at Q1 with 4.01% and pumice at Q1 with 3.61%. Enhancement of pH was not uniform for both discharges; this is in line with the results of the study by Deshpande [12] who explained that the effluent reactor pH in general is not affected by the influent flow rate and the aerated or non-aerated condition of the MSL system.…”