title: The use of waterworks sludge for the treatment of vegetable oil refinery industry wastewater.
abstract: Water treatment works using coagulation/flocculation in the process stream will generate a waste sludge. This sludge is termed as ferric, alum, or lime sludge based on which coagulant was primarily used. The works in Adana, Turkey uses ferric chloride. The potential for using this sludge for the treatment of vegetable oil refinery industry wastewater by coagulation has been investigated. The sludge acted as a coagulant and excellent oil and grease, COD and TSS removal efficiencies were obtained. The optimum conditions were a pH of 6 and a sludge dose of 1100 mg SS l(-1). The efficiency of sludge was also compared with alum and ferric chloride for the vegetable oil refinery wastewater. At doses of 1300-1900 mg SS l(-1), the sludge was as effective as ferric chloride and alum at removing oil and grease, COD, and TSS. In addition, various combinations of ferric chloride and waterworks sludge were also examined. Under the condition of 12.5 mg l(-1) fresh ferric chloride and 1000 mg SS l(-1) sludge dose, 99% oil and grease 99% TSS and 83% COD removal efficiencies were obtained.
authors.affiliation: Faculty of Engineering and Architecture, Department of Environmental Engineering, Cukurova University, 01330 Balcali, Adana, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Basibuyuk
authors.forename: D G
authors.initials: DG
authors.lastname: Kalat
mesh_terms: D000534:Alum Compounds; D017610:Calcium Compounds; D002712:Chlorides; D005290:Ferric Compounds; D019649:Food Industry; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D010087:Oxides; D010938:Plant Oils / Q000032:analysis* / Q000302:isolation & purification; D012722:Sewage; D018505:Waste Management / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D000534:Alum Compounds; D017610:Calcium Compounds; D002712:Chlorides; D005290:Ferric Compounds; D007220:Industrial Waste; D010087:Oxides; D010938:Plant Oils; D012722:Sewage; D014874:Water Pollutants, Chemical; C041524:aluminum sulfate; C016538:lime; C024555:ferric chloride