Removal of nitrates from water in bioreactors with corncob support and polyurethane foam

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da Silva, Thais
da Silva Batista, Jesiane S
Stolle, Elaine M
Barana, Ana Claudia
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Copyright (c) 2023 Geama Magazine
Soupir, Michelle
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Agricultural and Biosystems Engineering

Since 1905, the Department of Agricultural Engineering, now the Department of Agricultural and Biosystems Engineering (ABE), has been a leader in providing engineering solutions to agricultural problems in the United States and the world. The department’s original mission was to mechanize agriculture. That mission has evolved to encompass a global view of the entire food production system–the wise management of natural resources in the production, processing, storage, handling, and use of food fiber and other biological products.

In 1905 Agricultural Engineering was recognized as a subdivision of the Department of Agronomy, and in 1907 it was recognized as a unique department. It was renamed the Department of Agricultural and Biosystems Engineering in 1990. The department merged with the Department of Industrial Education and Technology in 2004.

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  • Department of Agricultural Engineering (1907–1990)

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The presence of nitrate in bodies of water can cause damage to the environment and, if consumed, to humans. Studies show that bioreactors filled with organic supports are efficient in removing nitrates from agricultural drainage waters, which are rich in nutrients. This work aimed to evaluate the removal of nitrates in a fixed bed bioreactor filled with two types of support medium: R1 (Reactor 1), with pieces of corn cob, and R2 (Reactor 2), with pieces of corn cob and Mini Biobobs®. The reactors were fed with agricultural drainage water enriched with 20 mg.L-1 of N-NO3 and operated with hydraulic detention times (HDT) of 96, 48, 24 and 16 hours. It was observed that, with the exception of the tests with TDH = 16 h, all the others presented effluent with a N-NO3 concentration below 10 mg.L-1, which meets the standards required by Brazilian legislation for the potability of water for human consumption. . Using the NMP technique, the presence of denitrifying bacteria was found in both reactors, proving the removal of nitrate by the heterotrophic denitrification process. It can be concluded that the reactors studied are efficient in removing nitrates from water.
This article is published as Silva, T. da, Soupir, ML, da Silva Batista, JS., Stolle, EM., & Barana, AC (2023). Removal of nitrates from water in bioreactors with corncob support and polyurethane foam. Geama Magazine , 9 (2), 4–10. Retrieved from Posted with permission.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License .
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