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Treatment of mixed industrial wastewater by electrocoagulation and indirect electrochemical oxidation

IR@CSIR-NEERI

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Title Treatment of mixed industrial wastewater by electrocoagulation and indirect electrochemical oxidation
 
Creator Nidheesh, P. V.
Kumar, Abhijeet
Syam Babu, D.
Scaria, Jaimy
Suresh Kumar, M.
 
Subject Industrial Wastewater Treatment & Disposal
Water Pollution
Waste Water Treatment
 
Description Treatment of mixed industrial wastewater is a challenging task due to its high complexity. This work
scrutinizes the electrochemical treatment of mixed industrial wastewater, specifically electrocoagulation
and indirect electrochemical oxidation processes through COD and color removal studies. Both processes
are found to be more efficient at the wastewater pH. Monopolar connection was found more effective
than bipolar connection for the removal of COD and color from wastewater. The monopolar connection
removed COD up to 55% and color 56% whereas bipolar connection leads to the removal of 43% and 48%
respectively at wastewater pH with an applied voltage 1.5 V in the course of 1 h of electrolysis.
In the case of indirect electrochemical oxidation process using graphite electrodes, the COD and color
abatement efficiencies of the indirect electrochemical oxidation process were found as 55% and 99.8%,
respectively within 1 h of electrolysis conducted at pH 7.7, applied voltage 4 V, and NaCl concentration
1gL1
. This work also highlights the importance of the presence of electrolytes in the indirect electrochemical oxidation process as the external addition of sodium chloride significantly enhanced both
COD and color elimination efficiency
 
Publisher Elsevier
 
Date 2020
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1270/1/2020%20Abhijith%20Chemosphere.pdf
Nidheesh, P. V. and Kumar, Abhijeet and Syam Babu, D. and Scaria, Jaimy and Suresh Kumar, M. (2020) Treatment of mixed industrial wastewater by electrocoagulation and indirect electrochemical oxidation. Chemosphere, 251. p. 126437. ISSN 00456535
 
Relation http://dx.doi.org/10.1016/j.chemosphere.2020.126437
http://neeri.csircentral.net/1270/