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Craft Brewery Wastewater Treatment: a Fixed-Bed Single-Batch Reactor with Intermittent Aeration to Remove COD and TN
Roveroto, Gabriela Pereira; Teles, Jessica Cristine; Vuitik, Guilherme Araújo; Batista, Jesiane Stefânia da Silva; Barana, Ana Cláudia.
  • Roveroto, Gabriela Pereira; State University of Ponta Grossa. Department of Food Engineering. Environmental Research Lab. Ponta Grossa. BR
  • Teles, Jessica Cristine; State University of Ponta Grossa. Department of Food Engineering. Environmental Research Lab. Ponta Grossa. BR
  • Vuitik, Guilherme Araújo; State University of Ponta Grossa. School of Sanitary and Environmental Engineering. Ponta Grossa. BR
  • Batista, Jesiane Stefânia da Silva; State University of Ponta Grossa. School of Evolutive Biology. Ponta Grossa. BR
  • Barana, Ana Cláudia; State University of Ponta Grossa. Department of Food Engineering. Environmental Research Lab. Ponta Grossa. BR
Braz. arch. biol. technol ; 64(spe): e21200613, 2021. tab, graf
Article in English | LILACS | ID: biblio-1278456
ABSTRACT
Abstract This study evaluated an intermittently aerated, fixed-bed, single-batch reactor, with mini BioBob© as biofilm media support, as an alternative treatment of craft brewery wastewater. In order to remove chemical oxygen demand (COD) and total nitrogen (TN), seven conditions were performed in a central composite experimental design (CCD) with different aeration times (1, 2 and 3 h in a 4 h cycle) and hydraulic retention times (HRT) (12, 16 and 20 h). The results showed that the removal of COD and TN were positively affected by increased aeration time and HRT. The condition that presented the best quality effluent was Condition No. 1 (20 h HRT and 3 h aeration), with 209 ± 28 mg COD L-1; 3.00 ± 0.15 mg TKN L-1 ; and 0.67 ± 0.11 mg NO3-N L-1. Kinetic assays showed that the highest values for the substrate removal rate constant, kCOD = 0.1774 h-1 were obtained with the longest aeration time (3 h). The most probable number (MPN) test showed a higher concentration of denitrifying bacteria (heterotrophic), 3.3 x 106, than for AOB and NOB bacteria (autotrophic), which were 4.9 x 103 and 2.7 x 103, respectively. Moreover, it was possible to verify that correcting the influent alkalinity with 7.14 mg CaCO3 for each 1 mg of TKN resulted in better process efficiency. It was concluded that COD and TN can be removed from craft brewery wastewater using an intermittently aerated, fixed-bed, single-batch reactor with mini Biobob© as biofilm media support.
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Full text: Available Index: LILACS (Americas) Main subject: Nitrification Language: English Journal: Braz. arch. biol. technol Journal subject: Biology Year: 2021 Type: Article Affiliation country: Brazil Institution/Affiliation country: State University of Ponta Grossa/BR

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Full text: Available Index: LILACS (Americas) Main subject: Nitrification Language: English Journal: Braz. arch. biol. technol Journal subject: Biology Year: 2021 Type: Article Affiliation country: Brazil Institution/Affiliation country: State University of Ponta Grossa/BR