Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/15195
Title: Development of an integrated treatment system for ink effluent
Authors: CHUA CHEE YONG
Keywords: Wastewater treatment, Ink effluents, Oxidation, Assessment, Sonolysis, Electro-oxidation
Issue Date: 30-May-2006
Source: CHUA CHEE YONG (2006-05-30). Development of an integrated treatment system for ink effluent. ScholarBank@NUS Repository.
Abstract: A characterization study on synthetic wastewaters containing variouscommercially available ink-jet inks was conducted. Analysis of this resulted in theidentification of seven high-risk non-compliance parameters. A deterministicapproach based on Beera??s law of absorbance additivity was developed fordetermining the COD of mixtures of ink effluents using absorbance measurements atfour specific wavelengths. Based on an in-depth analysis of the compositions of inkeffluents, a list of simple and rapid on-site water quality parameters was proposed formonitoring the quality of the treated ink waste water. The feasibility of combiningultrasonication and Fentona??s reaction was investigated for treating various cyan inkeffluents, including the recently developed fade and smear resistance inks. Based onthe results obtained in the feasibility studies, a novel two-step treatment process wasdeveloped a?? the first step was an ultrasound-assisted electro-oxidation, while thesecond was chemical oxidation with the addition of hydrogen peroxide. Several rapidmethods for monitoring the reaction progress and ink effluent quality assessmenthave also been developed. In order to develop the novel two-step treatment processat the industrial scale, various correlations were made based on a number of vitalprocess parameters needed as model input for computer simulations. In particular,correlations for the power density for the reaction vessel within the conventionalultrasound baths and the kinetics data for various treatment steps were obtained.
URI: http://scholarbank.nus.edu.sg/handle/10635/15195
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