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Aplicação de Métodos de Tratamento de Efluentes Industriais com Peróxido de Cálcio
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 1.45 MB | Adobe PDF |
Authors
Abstract(s)
A crescente preocupação com a poluição das águas e a necessidade de tratamentos
eficazes para efluentes industriais motivaram a realização deste estudo, que teve como
foco explorar a utilização do peróxido de cálcio como uma alternativa ao peróxido de
hidrogénio em processos de oxidação química. O trabalho centrou-se no tratamento de
efluentes provenientes das indústrias têxtil e de processamento de azeite, setores que
geram efluentes altamente poluentes, com elevadas cargas orgânicas e outros
contaminantes, resultando num impacto ambiental significativo.
O principal objetivo deste estudo foi avaliar a eficácia da oxidação química com peróxido
de cálcio, isoladamente ou em combinação com a eletrocoagulação, na remoção de
matéria orgânica e da turbidez dos efluentes têxteis e das águas-ruças. Os resultados
mostraram que o tratamento apenas por oxidação química, com 4,0 g L-1 de peróxido de
cálcio, ao final de 1 hora de tratamento, teve uma eficácia relativamente baixa, com
percentagens de remoção de CQO de 25% e 38% nas águas-ruças e nos efluentes têxteis,
respetivamente. No entanto, a combinação da eletrocoagulação com oxidação química
com 4,0 g L-1 de peróxido de cálcio apresentou resultados superiores em ambos os
efluentes. No efluente têxtil, ao final de 1 hora de tratamento, obteve-se uma remoção de
59% da CQO, enquanto nas águas-ruças, a remoção de 47%. Além disso, observou-se
uma redução significativa da turbidez em ambos os efluentes. Embora o efluente têxtil
tenha apresentado uma maior percentagem de remoção, a quantidade total de CQO
removida das águas-ruças foi consideravelmente superior, sublinhando a eficácia desta
metodologia e a necessidade de otimizações específicas para cada tipo de efluente.
Os resultados indicam que o uso de peróxido de cálcio em combinação com
eletrocoagulação pode ser uma solução promissora para o tratamento de efluentes
industriais, oferecendo uma relação custo-benefício vantajosa e um desempenho
superior em comparação com métodos aplicados isoladamente. Este estudo demonstra
o potencial do peróxido de cálcio como um agente oxidante eficaz e destaca a importância
de adaptar os processos de tratamento às características específicas de cada tipo de
efluente.
The growing concern about water pollution and the need for effective treatments for industrial wastewaters motivated this study, which focused on exploring the use of calcium peroxide as an alternative to hydrogen peroxide in chemical oxidation processes. The study focuses on the treatment of wastewaters from the textile and olive oil processing industries, sectors known for generating highly polluting wastewaters with high organic loads and other contaminants, leading to a significant environmental impact. The main objective of this study was to evaluate the effectiveness of chemical oxidation using calcium peroxide, either alone or in combination with electrocoagulation, in the removal of organic matter and turbidity from textile and olive oil mill wastewater. The results showed that treatment with chemical oxidation alone, using 4.0 g L-1 of calcium peroxide, after 1 hour of treatment, had relatively low effectiveness, with chemical oxygen demand removal rates of 25% and 38% in the olive oil mill wastewater and textile wastewater, respectively. However, the combination of electrocoagulation with chemical oxidation using 4.0 g L-1 of calcium peroxide showed better results in both wastewaters. In the textile wastewater, after 1 hour of treatment, a 59% removal of COD was achieved, while in the olive oil mill wastewater, COD removal reached 47%. Additionally, a significant reduction in turbidity was observed in both wastewaters. Although the textile wastewater showed a higher percentage of removal, the total amount of COD removed from the olive oil mill wastewater. was considerably higher, highlighting the effectiveness of this methodology and the need for specific optimizations for each type of wastewater. The results indicate that the use of calcium peroxide in combination with electrocoagulation could be a promising solution for industrial wastewater treatment, offering a cost-effective approach and superior performance compared to methods applied individually. This study demonstrates the potential of calcium peroxide as an effective oxidizing agent and highlights the importance of adapting treatment processes to the specific characteristics of each type of wastewater.
The growing concern about water pollution and the need for effective treatments for industrial wastewaters motivated this study, which focused on exploring the use of calcium peroxide as an alternative to hydrogen peroxide in chemical oxidation processes. The study focuses on the treatment of wastewaters from the textile and olive oil processing industries, sectors known for generating highly polluting wastewaters with high organic loads and other contaminants, leading to a significant environmental impact. The main objective of this study was to evaluate the effectiveness of chemical oxidation using calcium peroxide, either alone or in combination with electrocoagulation, in the removal of organic matter and turbidity from textile and olive oil mill wastewater. The results showed that treatment with chemical oxidation alone, using 4.0 g L-1 of calcium peroxide, after 1 hour of treatment, had relatively low effectiveness, with chemical oxygen demand removal rates of 25% and 38% in the olive oil mill wastewater and textile wastewater, respectively. However, the combination of electrocoagulation with chemical oxidation using 4.0 g L-1 of calcium peroxide showed better results in both wastewaters. In the textile wastewater, after 1 hour of treatment, a 59% removal of COD was achieved, while in the olive oil mill wastewater, COD removal reached 47%. Additionally, a significant reduction in turbidity was observed in both wastewaters. Although the textile wastewater showed a higher percentage of removal, the total amount of COD removed from the olive oil mill wastewater. was considerably higher, highlighting the effectiveness of this methodology and the need for specific optimizations for each type of wastewater. The results indicate that the use of calcium peroxide in combination with electrocoagulation could be a promising solution for industrial wastewater treatment, offering a cost-effective approach and superior performance compared to methods applied individually. This study demonstrates the potential of calcium peroxide as an effective oxidizing agent and highlights the importance of adapting treatment processes to the specific characteristics of each type of wastewater.
Description
Keywords
Águas-Ruças Efluentes Têxteis Eletrocoagulação Oxidação Química Peróxido de Cálcio