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Controlo Microbiano e Otimização Energética dos Pasteurizadores de uma Indústria Cervejeira
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| 7.39 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
A presente dissertação foi desenvolvida no Super Bock Group, no Serviço de
Enchimento do Centro de Produção de Leça do Balio, e teve como objetivo a diminuição
dos consumos de vapor associados aos pasteurizadores de cerveja e reduzir o risco de
Legionella nestes equipamentos.
Neste projeto, apresenta-se um procedimento destinado a alcançar esses objetivos,
baseado no doseamento de um biodispersante em contínuo na água de alimentação ao
pasteurizador. Este químico tem como objetivo minimizar a formação de biofilmes no
interior do pasteurizador, dispersando-os na água e facilitando a ação do biocida. A
implementação do tratamento iniciou-se na Linha 2, a qual serviu como piloto para avaliar
a eficiência deste tratamento. O estudo deste consistiu em duas fases: na primeira,
avaliou-se a situação inicial do pasteurizador e na segunda aplicou-se o químico de teste
e avaliou-se a sua eficácia. Foram realizadas em ambas as fases inspeções visuais no
interior do pasteurizador, bem como dos seus filtros, análises de ATP e de consumos
energéticos de água quente. Após o uso de biodispersante na água do pasteurizador,
realizou-se também uma monitorização da formação de espuma adicional no
pasteurizador, uma avaliação do seu impacto na ETAR e uma análise de Legionella.
Após análise aos parâmetros monitorizados, os resultados indicaram que a utilização
de biodispersante a 10 ppm teve um impacto positivo na redução da biomassa no interior
do pasteurizador, verificado quer visualmente quer pelas análises de ATP. Quanto à
redução dos consumos energéticos de água quente, não foi possível tirar conclusões
devido a uma falha mecânica que provocou a elevação do consumo. Relativamente à
diminuição do risco de Legionella, embora não haja dados concretos que comprovem essa
redução, é importante notar que o uso do biodispersante criou um ambiente menos
favorável ao crescimento dessa bactéria. Até ao momento, não foram identificados
quaisquer impactos negativos do uso de biodispersante.
Com o finalizar do estudo compreende-se que existem ainda procedimentos a efetuar
e foi ainda possível apresentar um conjunto de propostas de melhoria, de fácil
implementação, cuja adoção poderá conduzir a uma poupança económica para a empresa.
The present dissertation was developed at Super Bock Group, in the Filling Service of the Leça do Balio Production Center, with the aim of reducing steam consumption associated with beer pasteurizers and mitigating the risk of Legionella in these equipment. In this project, a procedure is presented to achieve these objectives, based on the continuous dosing of a biodispersant into the feedwater to the pasteurizer. This chemical is intended to minimize the formation of biofilms inside the pasteurizer, dispersing them in the water and facilitating the action of the biocide. The implementation of the treatment began on Line 2, which served as a pilot to assess the effectiveness of this treatment. The study consisted of two phases: in the first phase, the initial state of the pasteurizer was evaluated, and in the second phase, the test chemical was applied, and its effectiveness was assessed. Visual inspections were carried out inside the pasteurizer and its filters in both phases, as well as ATP analyses and hot water energy consumption measurements. After using the biodispersant in the pasteurizer water, additional foam formation in the pasteurizer was also monitored, its impact on the wastewater treatment plant (ETAR) was evaluated, and a Legionella analysis was conducted. After analysis of the monitored parameters, the results indicated that the use of a biodispersant at 10 ppm had a positive impact on reducing the biomass inside the pasteurizer, as observed both visually and through ATP analyses. As for the reduction in hot water energy consumption, no conclusions could be drawn due to a mechanical failure that caused an increase in consumption. Regarding the reduction of Legionella risk, although there are no concrete data to prove this reduction, it is important to note that the use of the biodispersant created a less favorable environment for the growth of this bacterium. So far, no negative impacts of biodispersant use have been identified. With the conclusion of the study, it is understood that there are still procedures to be carried out, and it was also possible to present a set of easily implementable improvement proposals that could lead to cost savings for the company.
The present dissertation was developed at Super Bock Group, in the Filling Service of the Leça do Balio Production Center, with the aim of reducing steam consumption associated with beer pasteurizers and mitigating the risk of Legionella in these equipment. In this project, a procedure is presented to achieve these objectives, based on the continuous dosing of a biodispersant into the feedwater to the pasteurizer. This chemical is intended to minimize the formation of biofilms inside the pasteurizer, dispersing them in the water and facilitating the action of the biocide. The implementation of the treatment began on Line 2, which served as a pilot to assess the effectiveness of this treatment. The study consisted of two phases: in the first phase, the initial state of the pasteurizer was evaluated, and in the second phase, the test chemical was applied, and its effectiveness was assessed. Visual inspections were carried out inside the pasteurizer and its filters in both phases, as well as ATP analyses and hot water energy consumption measurements. After using the biodispersant in the pasteurizer water, additional foam formation in the pasteurizer was also monitored, its impact on the wastewater treatment plant (ETAR) was evaluated, and a Legionella analysis was conducted. After analysis of the monitored parameters, the results indicated that the use of a biodispersant at 10 ppm had a positive impact on reducing the biomass inside the pasteurizer, as observed both visually and through ATP analyses. As for the reduction in hot water energy consumption, no conclusions could be drawn due to a mechanical failure that caused an increase in consumption. Regarding the reduction of Legionella risk, although there are no concrete data to prove this reduction, it is important to note that the use of the biodispersant created a less favorable environment for the growth of this bacterium. So far, no negative impacts of biodispersant use have been identified. With the conclusion of the study, it is understood that there are still procedures to be carried out, and it was also possible to present a set of easily implementable improvement proposals that could lead to cost savings for the company.
Description
Keywords
Brewery Industry Pasteurizer Biofilms Sanitization Clean in Place Steam Hot Water Energy Optimization Legionella