<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>In this study, the effectiveness of mineral pumice application in sewage treatment in the dairy industries was investigated, with various factors such as adsorbent dose, mixing speed, pH and contact time being studied in detail. The results obtained showed that mineral pumice in a granular form, with a contact time of 20 hours and a volume fraction of one third and pH of 8 has the ability to COD (Chemical Oxygen Demand) decreasing up to 56.9%. However, by using mineral pumice in powder form, in three cases considered, higher efficiency than for pumice granules has been observed. It seems that acidity conditions do not have a positive effect on this efficiency. As the contact time increased, the adsorption rate increased, mostly due to increased probability of collision with the adsorbent surface. With an increasing adsorbent dose, the absorption rate also increased, especially in the range of 15 g/l. Regarding the mixing speed, no definite conclusion can be drawn, because in some cases, with increasing mixing speed, the COD reduction efficiency decreased. Considering the use of mineral pumice in reducing COD, in accordance with to the obtained results, it is better to use mineral pumice in granular, rather than in powder, form.</p>
</abstract>

In this study, the effectiveness of mineral pumice application in sewage treatment in the dairy industries was investigated, with various factors such as adsorbent dose, mixing speed, pH and contact time being studied in detail. The results obtained showed that mineral pumice in a granular form, with a contact time of 20 hours and a volume fraction of one third and pH of 8 has the ability to COD (Chemical Oxygen Demand) decreasing up to 56.9%. However, by using mineral pumice in powder form, in three cases considered, higher efficiency than for pumice granules has been observed. It seems that acidity conditions do not have a positive effect on this efficiency. As the contact time increased, the adsorption rate increased, mostly due to increased probability of collision with the adsorbent surface. With an increasing adsorbent dose, the absorption rate also increased, especially in the range of 15 g/l. Regarding the mixing speed, no definite conclusion can be drawn, because in some cases, with increasing mixing speed, the COD reduction efficiency decreased. Considering the use of mineral pumice in reducing COD, in accordance with to the obtained results, it is better to use mineral pumice in granular, rather than in powder, form.

Mineral Pumice Efficiency in Wastewater Treatment in Dairy Industries

Ph.D. student, Water Engineering Department

College of Agriculture, Shahrekord University

Visiting Researcher, Department of Natural Sciences

and Research Associate at the Department of Civil Engineering, School of Engineering

Archives of Hydro-Engineering and Environmental Mechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Mineral Pumice Efficiency in Wastewater Treatment in Dairy Industries"}

In this study, the effectiveness of mineral pumice application in sewage treatment in the dairy industries was investigated, with various factors such as...

Mineral Pumice Efficiency in Wastewater Treatment in Dairy Industries

Published Online: Dec 26, 2023

Page range: 129 - 139

Received: Jun 06, 2023

DOI: https://doi.org/10.2478/heem-2023-0009

Keywords
Mineral Pumice, Sewage of the Dairy Industries, COD, Sewage Treatment

© 2023 Hamid Raeisi Vanani et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Mineral Pumice Efficiency in Wastewater Treatment in Dairy Industries

Published Online: Dec 26, 2023

Page range: 129 - 139

Received: Jun 06, 2023

DOI: https://doi.org/10.2478/heem-2023-0009

KeywordsMineral Pumice, Sewage of the Dairy Industries, COD, Sewage Treatment

© 2023 Hamid Raeisi Vanani et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Mineral Pumice, Sewage of the Dairy Industries, COD, Sewage Treatment