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http://dx.doi.org/10.9713/kcer.2013.51.2.257

Application of Ti-salt Coagulant and Sludge Recycling for Phosphorus Removal in Biologically Treated Sewage Effluent  

Kim, Jong Beom (School of Applied Chemical Engineering and The Research Institute for Catalysis, Chonnam National University)
Park, Hee-Ju (Photo & Environmental Technology Co., Ltd.)
Lee, Ki Won (Photo & Environmental Technology Co., Ltd.)
Jo, A Ra (Photo & Environmental Technology Co., Ltd.)
Kim, Myung Wan (Photo & Environmental Technology Co., Ltd.)
Lee, Young Jun (School of Applied Chemical Engineering and The Research Institute for Catalysis, Chonnam National University)
Park, Se Min (School of Applied Chemical Engineering and The Research Institute for Catalysis, Chonnam National University)
Lee, Kwang Young (Photo & Environmental Technology Co., Ltd.)
Shon, Ho Kyong (Faculty of Engineering, University of Technology)
Kim, Jong-Ho (School of Applied Chemical Engineering and The Research Institute for Catalysis, Chonnam National University)
Publication Information
Korean Chemical Engineering Research / v.51, no.2, 2013 , pp. 257-262 More about this Journal
Abstract
As the regulation of total phosphorus (T-P) concentration in biologically treated sewage effluent is reduced to 0.2~2 mg/L, flocculation process is recommended to remove T-P. In this study, the performance of Ti-salt coagulant was investigated in terms of dosage and pH in removing phosphorus and the collected sludge after Ti-salt flocculation was calcined to produce titania for effective sludge recycling. The flocculation performance was carried out using two methods: sedimentation and air floatation. Both methods were feasible to apply for Ti-salt flocculation. Ti-salt flocculation was effective in reducing phosphorus concentration in sewage effluent, which showed similar performance of alum ($Al_2(SO_4)_3$). The calcined sludge was recycled to titania which is the widely used metal oxide. Titania produed from Ti-salt sludge indicated similar characteristics of commercially-available P-25 in regard to photocatalytic activity and surface area. Therefore, this can be easily adopted to titania application by replacing P-25.
Keywords
Phosphorus; Ti-salt Coagulant; Wastewater; Sludge Recycling; Titania;
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