Assessment of the utilization rate of organic and nitrogenated substrates by the microorganisms in a sequencing batch reactor treating tannery wastewater
| Autor: | Estefania Freytez-Boggio, Adriana Mercedes Márquez-Romance, Sandra Gabriela Barrazueta-Rojas, Edilberto Guevara-Pérez |
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| Jazyk: | English<br />Spanish; Castilian |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Tecnología y ciencias del agua, Vol 14, Iss 5, Pp 54-119 (2023) |
| Druh dokumentu: | article |
| ISSN: | 0187-8336 2007-2422 |
| DOI: | 10.24850/j-tyca-14-05-02 |
| Popis: | In this article, the utilization rate of organic and nitrogenous substrates contained in tannery wastewater by a sequential batch reactor is evaluated. Two factorial experimental designs (FEDs) were implemented. FED1 (22) used granular biomass, the aeration sequence (oxic, anaerobic-oxic) and cycle duration (6 and 24 h). FED2 (4 x 3) included suspended biomass, reaction phases (anoxic I, oxic, anoxic II (CND: conventional nitrification-denitrification) and (SND: simultaneous nitrification-denitrification), filling time (fast, slow and in stages). The substrates examined were chemical oxygen demand (COD), ammonium (NH4+-N) and total nitrogen Kjeldahl (TKN). The utilization rates were COD (-100 and -200 mg l-1 h-1) (FED1) and (-48 and -75 mg l-1 h-1) (FED2), being 1.5 to 2 times higher in FED1 than FED2. In TKN (-5 mg l-1 h-1), and NH4+-N (-30 mg l-1 h-1), they were significant in the anoxic I and oxic phases. |
| Databáze: | Directory of Open Access Journals |
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