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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Treatment of real dairy wastewater by electrolysis and photo-assisted electrolysis in presence of chlorides

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Author(s):
Pereira de Sousa, Diego Domingos [1] ; Pinto, Camila Ferreira [1] ; Tonhela, Marquele Amorim [1] ; Granato, Ana Claudia [1] ; Motheo, Artur de Jesus [2] ; Lima, Alexandre de Faria [1] ; Ferreira, Deusmaque Carneiro [1] ; Fernandes, David Maikel [1] ; de Toledo Fornazari, Ana Luiza [3] ; Pointer Malpass, Geoffroy Roger [1]
Total Authors: 10
Affiliation:
[1] Univ Fed Triangulo Mineiro, Av Doutor Randolfo Borges Jr 1250, BR-38064200 Uberaba, MG - Brazil
[2] Univ Sao Paulo, Inst Quim Sao Carlos, Av Trab Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil
[3] Pontificia Univ Catolica Chile, Fac Quim, Dept Quim Inorgan, Ave Vicuna Mackenna, Santiago 4860 - Chile
Total Affiliations: 3
Document type: Review article
Source: WATER SCIENCE AND TECHNOLOGY; v. 80, n. 5, p. 961-969, SEP 1 2019.
Web of Science Citations: 0
Abstract

The efficiency of electrolysis (EC/Cl-2) and photo-assisted electrolysis (EC/UV/Cl-2) methods, in the presence of chloride, for the abatement of real dairy waste from a producer in the Triangulo Mineiro region of Brazil, was evaluated. A complete 2(3) factorial design was performed for the variables time, pH and current. After determining the ideal pH, a Central Compound Design (CCD) was performed, where the applied current (533.42 mA) and treatment time (60.45 minutes) were maximized. The effluent was subsequently submitted to prolonged EC/Cl-2 and EC/UV/Cl-2 treatment in order to evaluate the behaviour of specific environmental parameters over time. The EC/UV/Cl-2 method was more efficient than simple EC/Cl-2 treatment. The EC/UV/Cl-2 method resulted in a reduction of all environmental parameters investigated to levels within legal standards for effluent discharge. A relatively low cost of treatment is obtained with Energy per Order (E-EO) values of 0.89 and 1.22 kWh m(-3) order(-1) for the EC/UV/Cl-2 and EC/Cl-2 treatments, respectively. The electrochemical production of free chlorine species followed by subsequent photolysis and production of radical species can convert a simple electrochemical process into an advanced oxidation process (AOP). (AU)

FAPESP's process: 14/02739-6 - Water reuse in irrigation and aquaculture: inactivation of pharmaceuticals and endocrine disruptors by solar photo-fenton
Grantee:Eduardo Bessa Azevedo
Support type: Regular Research Grants