Método respirométrico para o monitoramento de processos biológicos

Andreottola, Gianni; Oliveira, Eder Jorge de; Foladori, P.; Dallago, L.; Peterlini, Roberto; Cadonna, Maria

doi:10.1590/s1413-41522005000100003

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…The study obtained VSS values of 12.9, 7.2 and 12.6 gVSS.m -2 , respectively, for biomedia surface area in the three experimental phases. These values are within the range found in the literature: 2 to 44 gVSS.m -2 [21,22,23,24]. Figure 2 demonstrates the historical series of VSS concentrations in both suspended and attached biomass.…”

Section: Adhered Biomass In the Ias Pilot Unitsupporting

confidence: 82%

Influence of Landfill Leachate on Organic Matter Removal in Activated Sludge and Activated Sludge with Carrier Processes

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Piveli

2020

Braz. arch. biol. technol.

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This study assessed the performance of two pilot units, a conventional activated sludge (CAS) and an Integrated Fixed-Film Activated Sludge (IAS), in the treatment of leachate from sanitary landfill combined with domestic sewage, with the aim of removing organic substances. In order to assess the possible impacts on treatment, three experimental phases were designed using influent leachate contributions of 5%, 10%, and 20% of the total BOD load. Overall, the results showed that no significant changes in the behavior of biological processes. The IAS unit presented average BOD removal efficiencies of above 88%, 87% and 80% for the three leachate load contributions of 5%, 10% and 20% studied. The CAS unit presented lower average efficiency with a 5% leachate contribution (64%), but displayed a similar performance to the IAS unit in the other phases (82% and 80%); similar quantitative aspects were observed for both treatment processes with regards to biomass composition analysis. The kinetic coefficients related to heterotrophic metabolism did not indicate negative effects on treatment efficiency as a result of the increase in leachate addition, with values of 2.8; 2.8 and 2.7 d-1 obtained respectively for each phase with the CAS unit, and 2.0; 1.5 and 1.6 d-1 with the IAS unit, representing similar values to those found in the literature (1.5 a 5.0 d-1). The results reinforced the conclusion that the leachate load introduced did not cause inhibition or significant alterations to heterotrophic metabolism, and, therefore, to the removal of organic matter.

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Section: Adhered Biomass In the Ias Pilot Unitsupporting

confidence: 82%

Influence of Landfill Leachate on Organic Matter Removal in Activated Sludge and Activated Sludge with Carrier Processes

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Piveli

2020

Braz. arch. biol. technol.

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“…A determinação da taxa de consumo de oxigênio (TCO) considera variações na taxa de respiração dos microrganismos presentes na biomassa utilizada no teste em consequência do tipo de substrato acrescido ao sistema (ANDREOTTOLA et al, 2005 (CATUNDA et al, 1996).…”

Section: Teste Respirométricounclassified

Impacto do uso de microrganismos em caixas sifonadas de ambientes sanitários

2016

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Resumo A preocupação com a qualidade de operação dos sistemas prediais de esgoto sanitário tem motivado empresas especializadas em biotecnologia a investir em produtos compostos por misturas de microrganismos vivos que atuam no pré-tratamento de efluentes de sistemas prediais para combater odores desagradáveis em ambientes sanitários. O objetivo deste artigo é avaliar o uso de misturas concentradas de microrganismos em caixas sifonadas para eliminar o mau cheiro em ambientes sanitários e o impacto em estações de tratamento de esgotos sanitários. O método consiste em diagnosticar o mau cheiro de um dos sanitários de um edifício escolar de nível superior, que é alvo de constantes reclamações por parte dos usuários. Em seguida, introduzir tabletes de microrganismos nas caixas sifonadas e, por fim, avaliar o impacto do uso desse produto em dois sanitários e em estações de tratamento de esgoto por meio de análises de demanda bioquímica de oxigênio e de testes de respirometria. Os resultados indicam que nestes ambientes sanitários o mau cheiro não foi reduzido com o emprego de tabletes de microrganismos e em Estações de Tratamento de Esgoto, na concentração indicada pelo fabricante, o produto não produziu alterações significativas nas características analisadas do esgoto.

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“…Porém, obviamente só se consegue medi-la na ausência do substrato, situação na qual este não interfere. (Andreottola -2005) O consumo de oxigênio, no entanto, pode ocorrer por outros meios que não pela biomassa; como por exemplo, a oxidação química do íon de ferro II a ferro III devido à presença de oxigênio. Outras espécies reduzidas também podem ser oxidadas, como íons reduzidos de enxofre (sulfeto, sulfito) ou outros (fosfito, hipofosfito etc.)…”

Section: Oxigêniounclassified

Determinação das frações orgânicas de efluentes de reatores UASB.

Brito¹

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The treatment of municipal wastewaters through "Up-flow Anaerobic with Sludge Blanket"-UASB reactors-, are already used for many years in some states of Brazil. It's output in the treatment is in the range of 65% to 75% of organic load remove in BOD, needing so an after-treatment, for example the AEROBIC, like Percolator Biologic Filters, aerated submerse Biological Filters, Activated Sludge etc. Due to the evolution of legislation and treatment systems in the tertiary level, that means, nutrients remove, these after-treatments are even more necessary to the removal of ammonia nitrogen for example, with complete removal using nitrification and denitrification or simply achieving the nitrification stage, because the ammonia is toxic to a great part of aquatic life, mostly fishes, while the nitrogen in the form of ions nitrate or nitrite is considered less toxic. There are already in the literature some descriptions of how to dimension those units of after-treatment, however, the parameters used are theoretical and based on the pre-existent to sanitary wastewater typically domestic, not having yet a source of experimental data for those parameters. The objective of this paper is to get real data to project the aftertreatment of effluents of UASB reactors, using the equation and the methods presented by Ekama, Dold e Marais (1986), based in a pilot system of Activated Sludge, in laboratory level, fed with effluent of an UASB reactor installed on the campus of USP, more precisely in the Hydraulic Technological Center (CTH). This reactor treats the wastewater generated in the communitary restaurant and apartments where the University students live (CRUSP). Like all the aerobic biologic systems of treatment base themselves in the same fractions, the collected data here are really useful to any other aerobic after-treatment of these effluents. The fractions obtained were: f up = 0,15, f rb ~0 and f us = 0,2.

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Método respirométrico para o monitoramento de processos biológicos

Abstract: ABSTRACT

Cited by 8 publications

References 7 publications

Influence of Landfill Leachate on Organic Matter Removal in Activated Sludge and Activated Sludge with Carrier Processes

Influence of Landfill Leachate on Organic Matter Removal in Activated Sludge and Activated Sludge with Carrier Processes

Impacto do uso de microrganismos em caixas sifonadas de ambientes sanitários

Determinação das frações orgânicas de efluentes de reatores UASB.

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