NDLI: Pretreatment of dyestuff wastewater by internal microelectrolysis

Content Provider	IEEE Xplore Digital Library
Author	Li Jizhou Niu Cheng Yuan Xuyin Tian Ming Ji Haoran
Copyright Year	2011
Description	Author affiliation: Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, China (Li Jizhou) \|\| College of Environment, Hohai University, Nanjing, China (Niu Cheng; Yuan Xuyin; Tian Ming; Ji Haoran)
Abstract	Internal microelectrolysis is an effective pretreatment technology for poor biodegradable industrial wastewater contaminated with dyestuffs, pesticides, pharmaceuticals, etc. In internal microelectrolysis system, numerous microscopic galvanic cells are formed between iron and carbon in wastewater, resulting in galvanic cell reaction. Products released from the galvanic cell reaction include hydroxyl, atomic hydrogen and Fe(II) which have high capacity to decompose contaminants. In this paper, the effects of internal microelectrolysis pretreatment for dyestuff wastewater were firstly studied. The degradation mechanism and influence factors of internal microelectrolysis were also investigated. Experimental results indicated that the weight ratio of iron to carbon is a key parameter during internal microelectrolysis. The optimum ratio of Fe/C was found to be 5. To obtain the maximum removal efficiency with low operation costs, reaction time of microelectrolysis was about 2 hours and the pertinent pH of influent was 2∼3. Under these optimum conditions, different concentrations of dyestuff wastewater were treated by internal microelectrolysis. In the end, the removal efficiency of COD was over 45 percent, and B/C of wastewater was increased obviously from 0.2 to about 0.4.
Starting Page	4279
Ending Page	4282
File Size	254620
Page Count	4
File Format	PDF
ISBN	9781457702891
e-ISBN	9781457702907
DOI	10.1109/ICETCE.2011.5774697
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Hazardous materials Internal microelectrolysis Dyestuff wastewater Lakes Iron Oxidation Pretreatment Wastewater Electrochemical processes Carbon
Content Type	Text
Resource Type	Article

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