pH-based control strategies for the nitrification of high-ammonium wastewaters

dc.contributor.authorVan Rooyen, Ignatius Leopoldus
dc.contributor.authorBrink, Hendrik Gideon
dc.contributor.authorNicol, Willie
dc.contributor.emailwillie.nicol@up.ac.zaen_US
dc.date.accessioned2022-08-04T11:15:19Z
dc.date.available2022-08-04T11:15:19Z
dc.date.issued2021-12-19
dc.description.abstractAquatic nitrogen pollution is one of the most urgent environmental issues requiring prevention and mitigation. Large quantities of high-ammonium wastewaters are generated by several industrial sectors, such as fertilizer and anaerobic-digestion plants. Nitrification of these wastewaters is commonly carried out, either to remove nitrogen or produce liquid fertilizers. Standard control methodologies for the efficient nitrification of high-ammonium wastewaters to produce liquid fertilizers have not yet been established and are still within their early stages of development. In this paper, novel pH-based control algorithms are presented that maintain operation at the microbial maximum reaction rate (umax) in batch and continuous reactors. Complete conversion of ammonium to nitrate was achieved in a batch setup, and a conversion of 93% (1%) was achieved in a continuously-stirred-tank-reactor. The unparalleled performance and affordability of the control schemes proposed offer a steppingstone to the future of sustainable fertilizer production.en_US
dc.description.departmentChemical Engineeringen_US
dc.description.librarianam2022en_US
dc.description.sponsorshipThe National Research Foundation of South Africaen_US
dc.description.urihttp://www.mdpi.com/journal/fermentationen_US
dc.identifier.citationVan Rooyen, I.L., Brink, H.G. & Nicol, W. pH-Based Control Strategies for the Nitrification of High-Ammonium Wastewaters. Fermentation 2021, 7, 319. https://DOI.org/10.3390/fermentation7040319.en_US
dc.identifier.issn2311-5637
dc.identifier.issn10.3390/fermentation7040319
dc.identifier.urihttps://repository.up.ac.za/handle/2263/86709
dc.language.isoenen_US
dc.publisherMDPIen_US
dc.rights© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.en_US
dc.subjectAmmoniumen_US
dc.subjectNitrateen_US
dc.subjectProtonen_US
dc.subjectHydroponicen_US
dc.subjectWastewateren_US
dc.subjectAquatic nitrogen pollutionen_US
dc.subjectHigh-ammonium wastewatersen_US
dc.titlepH-based control strategies for the nitrification of high-ammonium wastewatersen_US
dc.typeArticleen_US

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
VanRooyen_pHBased_2021.pdf
Size:
2.94 MB
Format:
Adobe Portable Document Format
Description:
Article

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description: