Removal Efficiency Of Black Cotton Soil In Attenuation Of Pollutants From Wastewater For Reusing Wastewaters For Aquifer Recharge Case Study Of Kality Treatment Plant Water

The objective of this study was to assess soil capability in attenuation of pollutants fromrnwastewater and to reuse it for aquifer recharge with indication of ground water protection.rnWastewater from textile treatment plant and sewage treatment plant was used.rnUndisturbed soil core of black cotton soil was used in the first 50cm of soil layer which isrnplaced in 20 PVC plastics to simulate soil column test. Black cotton soil is the dominant soil typernin the study area which has high in cation exchange capacity and low electric conductivity thisrnfeature is important for retention of nutrients. Three hydraulic loading rates was selectedrn136mm/d, 181 mm/d and 226mm/d for identification of optimum hydraulic loading rates.rnThe sodium adsorption value of kality treatement plant water and textile treatment plant waterrnwas initially 1.65 and1.98 respectively which is under safe range through the system there wasrnan increase trend observed which rise up to 1.92 and 2.64 for the respective water types atrn226mm/d and these HLRs where the least removal efficiency was obtained for the two waterrntypes showing developement of infiltration problem due to sodium effect which is one of thernfactor for reduction removal efficiency.rnFrom the study maximum removal of most nutrients was observed at 136mm/d hydraulic loadingrnrate than the remaining hydraulic loading rate. At this flow rate highest removal of, BOD, COD,rnNH3, NO2rn- PO4rn3-and EC was observed for both water types applied. There was statisticallyrnsignificant difference(P

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