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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1936
Title: Continuous electrocoagulation treatment of pulp and paper mill wastewater: Operating cost and sludge study
Authors: Mahesh S.
Garg K.K.
Srivastava V.C.
Mishra I.M.
Prasad B.
Mall I.D.
Published in: RSC Advances
Abstract: The present research deals with the treatment of agri-based pulp and paper mill wastewater by continuous electrocoagulation (CEC) process using iron (Fe) as an electrode material. Effects of flow rates (dm3 h-1): 0.5-4.0 and residence time (?): 0.5-4.0 h were investigated on degradation of chemical oxygen demand (COD), color, total solid (TS), turbidity, specific energy consumption (SEC), instantaneous current efficiency (ICE) and electrochemical degradation index (EDI). At flow rates of 1.0 and 0.5 dm3 h-1, COD removal efficiency of 78.20 and 82.15%; and color removal efficiency of 79 and 90%, respectively, was achieved. TS concentration of wastewater slurry was also reduced by 65% after 3 h residence time with flow rate of 1 dm3 h-1. The specific energy consumption (kW h per kgCODremoved) was decreased from 16.3 to 14.3 with decrease in ? from 4 to 1 h. At a supply charge concentration of 0.62 A h dm-3, the current efficiency (CE) values were 310% and 274% after ? = 2 and 1 h, respectively. Dissolution and consumption of electrodes were also studied with a change in flow rates. Sludge obtained after the CEC process was analyzed for settling and filterability characteristics, morphology and elemental analysis, point of zero charge, physicochemical and elemental characterization, and TS concentration. The operating cost of the process was also calculated based on the electrical energy and electrode consumption and was found to be 61.0 Indian Rupees (0.9 USD) for the treatment of 1 m3 of wastewater. © The Royal Society of Chemistry 2016.
Citation: RSC Advances (2016), 6(20): 16223-16233
URI: https://doi.org/10.1039/c5ra27486a
http://repository.iitr.ac.in/handle/123456789/1936
Issue Date: 2016
Publisher: Royal Society of Chemistry
ISSN: 20462069
Author Scopus IDs: 6603729268
56112049800
35565811700
23668474600
15838004000
55664368900
Author Affiliations: Mahesh, S., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India, Department of Environmental Engineering, Sri Jayachamarajendra College of Engineering, Mysore, Karnataka 570006, India
Garg, K.K., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Srivastava, V.C., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Mishra, I.M., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India, Department of Chemical Engineering, Indian School of Mines, Dhanbad, 826004, India
Prasad, B., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Mall, I.D., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India, Department of Chemical Engineering, University of Petroleum and Energy Studies, Dehradun, Uttarakhand 248 007, India
Corresponding Author: Mahesh, S.; Department of Chemical Engineering, Indian Institute of Technology RoorkeeIndia; email: mahina1963@rediffmail.com
Appears in Collections:Journal Publications [CH]

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