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Abstract(s)
Para que um laboratório de análise físico-químicas produza resultados fiáveis, os seus métodos de ensaio têm de ser constantemente avaliados, de modo a garantir não só a sua adequabilidade e qualidade, mas também a comparabilidade dos resultados analíticos. A avaliação e validação dos métodos de ensaio cresceu em sintonia com o conceito de qualidade, apresentando ambos uma elevada importância no seio industrial. Nos laboratórios de análise responsáveis pela emissão de resultados, que muitas das vezes influenciam etapas de processos e/ou avaliam a sua eficiência, a fiabilidade dos resultados é crucial, estando frequentemente sujeitos a regulamentação, como é o caso dos laboratórios acreditados para efetuarem a monitorização química do estado da água.
A Águas de Valongo, S.A. é responsável pela exploração de diversas ETAR, estando obrigada a apresentar à Agência Portuguesa do Ambiente, os boletins analíticos que comprovam a eficiência e cumprimento dos limites de emissão de acordo com a legislação em vigor.
No laboratório da empresa são realizadas diariamente análises de controlo às ETAR de Campo-Valongo, Ermesinde, Alfena (Nossa Senhora do Amparo) e à mini-ETAR da Palmilheira. As análises de controlo focam-se nos parâmetros com valores limite de emissão estabelecidos no Decreto-Lei n.º 152/2017 e em parâmetros de interesse que ajudam a controlar eventuais alterações ao processo de tratamento.
A carência química de oxigénio, carência bioquímica de oxigénio ao final de 5 dias, sólidos suspensos totais, sólidos suspensos fixos, sólidos suspensos voláteis, nitrogénio total e fósforo total, foram os parâmetros avaliados e para os quais se estabeleceu um plano de controlo de qualidade analítica interno. A implementação do sistema de controlo de qualidade implicará o consumo recursos, nomeadamente reagentes, tendo sido realizada uma estimativa de custos para a sua operacionalização.
O controlo de qualidade da amostragem foi também, no âmbito do trabalho realizado, considerada, pois sem assegurar a colheita adequada das amostras, o seu transporte e conservação (preservação) não será possível gerar resultados de qualidade e que respondam corretamente às exigências estabelecidas
For a physical-chemical analysis laboratory to produce reliable results, test methods must be constantly evaluated to guarantee not only their suitability and quality but also the comparability of analytical results. The evaluation and validation of test methods grew in line with the concept of quality, which are highly important in the industrial sector. In the analysis laboratories responsible for issuing results, which often influence process steps or evaluate their efficiency, the reliability of the results is crucial, and they are often subject to regulation, as is the case of laboratories accredited to monitoring water state chemistry. Águas de Valongo, S.A. is responsible for the operation of several WWTP, being obliged to present to the Portuguese Environment Agency the analytical bulletins that prove the efficiency and compliance with the emission limits following the legislation in force. The company's laboratory, daily control analyses are carried out at the WWTPs in Campo-Valongo, Ermesinde, Alfena (Nossa Senhora do Amparo), and at the mini-WWTP in Palmilheira. Control analyses focus on parameters with emission limit values established in Decree-Law no. 236/98 of the Portuguese constitution and on parameters of interest that help to control eventual changes to the treatment process. Chemical oxygen demand, biochemical oxygen demand after 5 days, total suspended solids, fixed suspended solids, volatile suspended solids, total nitrogen, and total phosphorus were the parameters evaluated and for which a quality control plan was established internal analytics. The implementation of the quality control system will involve the consumption of resources, namely reagents, and a cost estimate has been carried out for its operation. The quality of the sampling was also considered, within the scope of the work carried out because without ensuring the proper collection of the samples, their transport, and conservation (preservation) it will not be possible to generate quality results that correctly meet the established requirements
For a physical-chemical analysis laboratory to produce reliable results, test methods must be constantly evaluated to guarantee not only their suitability and quality but also the comparability of analytical results. The evaluation and validation of test methods grew in line with the concept of quality, which are highly important in the industrial sector. In the analysis laboratories responsible for issuing results, which often influence process steps or evaluate their efficiency, the reliability of the results is crucial, and they are often subject to regulation, as is the case of laboratories accredited to monitoring water state chemistry. Águas de Valongo, S.A. is responsible for the operation of several WWTP, being obliged to present to the Portuguese Environment Agency the analytical bulletins that prove the efficiency and compliance with the emission limits following the legislation in force. The company's laboratory, daily control analyses are carried out at the WWTPs in Campo-Valongo, Ermesinde, Alfena (Nossa Senhora do Amparo), and at the mini-WWTP in Palmilheira. Control analyses focus on parameters with emission limit values established in Decree-Law no. 236/98 of the Portuguese constitution and on parameters of interest that help to control eventual changes to the treatment process. Chemical oxygen demand, biochemical oxygen demand after 5 days, total suspended solids, fixed suspended solids, volatile suspended solids, total nitrogen, and total phosphorus were the parameters evaluated and for which a quality control plan was established internal analytics. The implementation of the quality control system will involve the consumption of resources, namely reagents, and a cost estimate has been carried out for its operation. The quality of the sampling was also considered, within the scope of the work carried out because without ensuring the proper collection of the samples, their transport, and conservation (preservation) it will not be possible to generate quality results that correctly meet the established requirements
Description
Keywords
Águas Residuais Amostragem Controlo de Qualidade Analítica Controlo de Qualidade Interno Validação de Métodos de Ensaio Analytical Quality Control Internal Quality Control Sampling Validation of Test Methods Wastewaters