کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
641126 | 1456989 | 2014 | 7 صفحه PDF | دانلود رایگان |
• Greywater from a middle-class Indian home was analyzed continuously for six months.
• Laundry and kitchen together generated most of the BOD and COD loads.
• Most of the pathogen contamination was contributed by bathroom/showers.
• Electrocoagulation at 12 V with aluminum plates effectively removed contaminants.
• COD removal efficiency increased with current density but remained limited to 70%.
Wastewater produced from all the domestic uses of water sans toilet flushing is known as greywater. It is often the major component in the domestic wastewater but has fewer pollutant load. Recycling and reuse of treated greywater for non-potable purposes may significantly reduce the stress on the fresh water requirement. This article presents the result of a study undertaken for characterization as well as laboratory-based investigation for treatment of greywater generated from an Indian single household. The greywater constituted at least 80% of the total wastewater with maximum contribution (44%) from the kitchen. The treatment studies, undertaken in an electrochemical reactor where the voltage and current were varied for sacrificial aluminum anodes, revealed that about 70% of the total COD and more than 99.9% pathogens could be removed with an energy consumption of 0.3 kW h/m3 of wastewater. COD removal reached a maximum of 70%, irrespective of the applied voltage and current density, at an aluminum release from the anode at a rate of 15 mg/L as aluminum. The electrochemical reactor aluminum electrodes, operated with maximum potential difference of 12 V, showed potential for scale-up for real-life use in households for removal of pathogens, turbidity and COD contents of greywater.
Journal: Separation and Purification Technology - Volume 130, 10 June 2014, Pages 160–166