Performance of lab-scale filtration system for grey water treatment and reuse

Abstract

In this study, we evaluate the performance of a lab-scale filtration system for greywater treatment and reuse using sand and granular activated carbon as filter media. Using a laboratory, Physico-chemical and microbiological parameters are determined. The treatment efficiency comparison is made between lab-scale filtration systems that use gravel + sand and gravel + sand + GAC using pre-filtration and post-filtration mean values at different hydraulic retention times (HRT) and different filter columns. For both filter columns used, the treatment efficiency of the system increased with HRT at 12 h and 24 h and later on it decreased at 36 h. The pollution reduction was from 60.8% - 100% for selected parameters (pH, turbidity, BOD, COD, TC, and FC) in filter column B and from 47.2% - 100% for filter column A. Thus, filtration systems are efficient at improving hygiene, and water shortage at the university. Also, the results of the willingness to use the treated greywater (TGW) revealed that on the average, about 84.75%, 91.75%, and 100% of the respondents are willing to adopt the TGW for toilet flushing, pavement washing, and flower garden watering respectively.