Abstract/Details

Industrial wastewater treatment by electrocoagulation and conventional coagulation


2007 2007

Other formats: Order a copy

Abstract (summary)

This research was postulated in order to increase the knowledge on the electrochemically-assisted-coagulation of industrial wastewaters using aluminium anodes. Hence, the aim of this work has been the study of the electrocoagulation process to treat aqueous synthetic effluents polluted with colloidal particles, organic matter, or Oil-in-Water emulsions, using aluminium electrodes. This general aim has been divided in several partial objectives: (1) Characterization of the chemical and electrochemical dissolution of aluminium sheets, when they are used as electrodes in the electrocoagulation process. (2) Characterization of the hydrolyzed aluminium species generated in the conventional coagulation and electrocoagulation processes. (3) Mathematical modelling of the electrodissolution of aluminium sheets when they are used as electrodes in the electrocoagulation process. (4) Study of the influence of the wastewater characteristics and of the operation conditions on the electrocoagulation of wastewaters polluted with kaolin (as model of colloidal suspension), Eriochrome Black T (as model of wastewater polluted with dissolved organic matter), and with O/W emulsions. (5) Comparison of the conventional and electrochemical coagulation processes in the treatment of wastewaters polluted with kaolin, EBT and O/W emulsions. (6) Preliminary comparison of the operating costs, for the dosing of coagulant by the conventional and the electrochemical technologies. (7) Mathematical modelling of the conventional and electrochemical coagulation of wastewaters polluted with kaolin, EBT and O/W emulsions.

It has been found that in the electrochemical cell, the aluminium added to the electrolyte comes from both chemical (corrosion) and electrochemical dissolution processes. As well, it was observed that the speciation of aluminium in an aqueous solution does not depend directly on the dosing technology, but on the total concentration of aluminium and pH. The studies of electrocoagulation of wastewaters with aluminium electrodes have shown that this process can be successfully applied in the treatment of wastes polluted with kaolin, EBT and O/W emulsions. Regarding the comparison, there are not significant differences between the efficiencies obtained by the conventional and the electrochemical technologies, when the same values of pH and aluminium concentration are attained in the reaction system. Finally, the economical evaluation showed lower operating costs for the electrochemical process for low and intermediate aluminium doses.

Indexing (details)


Subject
Chemical engineering;
Environmental science;
Environmental engineering
Classification
0542: Chemical engineering
0768: Environmental science
0775: Environmental engineering
Identifier / keyword
Health and environmental sciences; Applied sciences; Coagulation; Electrocoagulation; Industrial wastewater; Wastewater treatment
Title
Industrial wastewater treatment by electrocoagulation and conventional coagulation
Author
Martinez Navarro, Fabiola
Number of pages
286
Publication year
2007
Degree date
2007
School code
1397
Source
DAI-B 69/01, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780549435655
Advisor
Canizares, Pable Canizares; Rodrigo, Manuel Andres Rodrigo
University/institution
Universidad de Castilla - La Mancha (Spain)
University location
Spain
Degree
Dr.
Source type
Dissertations & Theses
Language
Spanish
Document type
Dissertation/Thesis
Dissertation/thesis number
3299107
ProQuest document ID
304701911
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304701911
Access the complete full text

You can get the full text of this document if it is part of your institution's ProQuest subscription.

Try one of the following:

  • Connect to ProQuest through your library network and search for the document from there.
  • Request the document from your library.
  • Go to the ProQuest login page and enter a ProQuest or My Research username / password.