<b>Evaluation of an activated sludge reactor applied to nitrification using kinetic assays</b> - DOI: 10.4025/actascitechnol.v30i1.3201

Authors

  • Valéria Reginatto UFSC
  • Fabrí­cio Butierres Santana UFSC
  • Willibaldo Schmidell UFSC
  • Hugo Moreira Soares UFSC

DOI:

https://doi.org/10.4025/actascitechnol.v30i1.3201

Keywords:

nitrification, activity assay, activated sludge, kinetic models, inhibition

Abstract

In this work, an activated sludge lab-scale reactor used for nitrification was monitored by specific activity kinetic assays. The nitrification biomass activity was carried out by respirometric methods in order to characterize the inoculum and the reactor sludge after two different operation conditions: during the feeding of the reactor with synthetic autotrophic medium, and after feeding it with effluent from an UASB reactor used for denitrification. The efficiency of nitrification reached 90% in both operation conditions. Results obtained by the kinetic activity assays were better adjusted by the kinetic model of Andrews, which includes the inhibition constant by the substrate (Ki), than the Monod model. However, an increase was observed in the inhibition constant (Ki) of the sludge after the operation of the reactor as compared with the inoculum. This effect demonstrates an adaptation of the biomass to the new nitrification conditions (loading rate).

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Author Biography

Valéria Reginatto, UFSC

Graduação em Farmácia e Bioquí­mica - opção Tecnologia de Alimentos pela Universidade Federal de Santa Catarina - UFSC (1987), mestrado em Ciência de Alimentos pela Universidade Estadual de Campinas - UNICAMP (1992), doutorado sanduí­che em Ciências pelo Instituto de Quí­mica da UNICAMP (1998) e pelo Instituto de Qualidade de Íguas/Universidade de Hannover - Alemanha. Possui experiência na área de Ciência e Tecnologia de Alimentos, tendo atuado como responsável pelo laboratório de desenvolvimento e controle de qualidade na indústria PRODESA (Produtos Especiais para Alimentos - Ltda). Atuou como professor colaborador na UNIVALI (Universidade do Vale do Itajaí­), ministrando a disciplina de microbiologia e atua como professora convidada nos cursos de pós-graduação em Ciência de Alimentos e Engenharia de Alimentos na UFSC. Atualmente também participa de vários projetos de pesquisa que concentram-se nas áreas de caracterização fí­sico-quí­mica e microbiológica de resí­duos agroindustriais, biotecnologia aplicada ao aproveitamento, valorização e tratamento de resí­duos agroindustriais e qualidade de águas Currí­culo Lattes

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Published

2008-05-08

How to Cite

Reginatto, V., Santana, F. B., Schmidell, W., & Soares, H. M. (2008). <b>Evaluation of an activated sludge reactor applied to nitrification using kinetic assays</b> - DOI: 10.4025/actascitechnol.v30i1.3201. Acta Scientiarum. Technology, 30(1), 49–55. https://doi.org/10.4025/actascitechnol.v30i1.3201

Issue

Vol. 30 No. 1 (2008)

Section

Chemical Engineering

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