INVESTIGATIVE STUDY ON THE TREATMENT OF DOMESTIC WASTEWATER BY SOIL AQUIFER TREATMENT (SAT) IN CONJUNCTION WITH CASHEW NUT SHELL ADSORBENT

In the present work, Cashew nut shell was used to enhance the removal efficiency of Soil Aquifer System (SAT) for the removal of Pollutants present in the Domestic Wastewater. The column studies were carried out using Domestic Wastewater and varying adsorbent heights (25%, 50% and 75%) in 1.0m soil depth. Soil properties were determined and Clayey Sandy Soil was used. The efficiency of SAT to remove TS, TDS, Cl, COD and TKN without Cashew Nut Shell resulted in 49.89%, 51.23%, 48.73%, 55.15% and 52.00% respectively. The conjunction of Cashew Nut Shell in SAT resulted in increased removal efficiency. Whereas the efficiency was observed maximum at 50% height of adsorbent resulting 68.50%, 70.00%, 62.48%, 65.80 and 62.18 for TS, TDS Cl, COD and TKN respectively. Comparison studies show that SAT in conjunction with Cashew Nut Shell showed better performance than without adsorbent one.