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A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation

Effluents from gelatin production plants are highly complex and difficult to treat by conventional methods. The Electrocoagulation (EC) technique was evaluated to treat effluents that contain a heavy load of Chemical Oxygen Demand (COD) and a large quantity of suspended solids. This paper presents r...

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Autores principales: Arturi, Tatiana S., Seijas, Carlos J., Bianchi, Gustavo L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6543083/
https://www.ncbi.nlm.nih.gov/pubmed/31193809
http://dx.doi.org/10.1016/j.heliyon.2019.e01738
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author Arturi, Tatiana S.
Seijas, Carlos J.
Bianchi, Gustavo L.
author_facet Arturi, Tatiana S.
Seijas, Carlos J.
Bianchi, Gustavo L.
author_sort Arturi, Tatiana S.
collection PubMed
description Effluents from gelatin production plants are highly complex and difficult to treat by conventional methods. The Electrocoagulation (EC) technique was evaluated to treat effluents that contain a heavy load of Chemical Oxygen Demand (COD) and a large quantity of suspended solids. This paper presents results of laboratory scale studies that compare the performance of Chemical Coagulation (CC) with aluminum salts and EC with aluminum electrodes. The heavy organic load and suspended solids in this kind of wastewater lead to low performance in the secondary treatment. SEM-EDS were used to analyze the sludge formed in the EC process and the removal mechanism of pollutants from the wastewater. The structure and composition of the precipitates at different operation conditions, such as pH, show that EC has increased efficiency of COD removal, compared to CC with the same dose of aluminum (Al(+3)) as coagulant. The efficiency of COD removal was 73.6% with EC and 55.6% with CC. The in-situ formation of zeolites in the EC process explains the high efficiency of this treatment compared to the CC process. The zeolite formation during the EC process in the wastewater of the gelatin production plant has not been reported until now.
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spelling pubmed-65430832019-06-03 A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation Arturi, Tatiana S. Seijas, Carlos J. Bianchi, Gustavo L. Heliyon Article Effluents from gelatin production plants are highly complex and difficult to treat by conventional methods. The Electrocoagulation (EC) technique was evaluated to treat effluents that contain a heavy load of Chemical Oxygen Demand (COD) and a large quantity of suspended solids. This paper presents results of laboratory scale studies that compare the performance of Chemical Coagulation (CC) with aluminum salts and EC with aluminum electrodes. The heavy organic load and suspended solids in this kind of wastewater lead to low performance in the secondary treatment. SEM-EDS were used to analyze the sludge formed in the EC process and the removal mechanism of pollutants from the wastewater. The structure and composition of the precipitates at different operation conditions, such as pH, show that EC has increased efficiency of COD removal, compared to CC with the same dose of aluminum (Al(+3)) as coagulant. The efficiency of COD removal was 73.6% with EC and 55.6% with CC. The in-situ formation of zeolites in the EC process explains the high efficiency of this treatment compared to the CC process. The zeolite formation during the EC process in the wastewater of the gelatin production plant has not been reported until now. Elsevier 2019-05-29 /pmc/articles/PMC6543083/ /pubmed/31193809 http://dx.doi.org/10.1016/j.heliyon.2019.e01738 Text en © 2019 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Arturi, Tatiana S.
Seijas, Carlos J.
Bianchi, Gustavo L.
A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation
title A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation
title_full A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation
title_fullStr A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation
title_full_unstemmed A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation
title_short A comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation
title_sort comparative study on the treatment of gelatin production plant wastewater using electrocoagulation and chemical coagulation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6543083/
https://www.ncbi.nlm.nih.gov/pubmed/31193809
http://dx.doi.org/10.1016/j.heliyon.2019.e01738
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