Toplam Biyolojik Yük Sayısı için Kontrol Tablosu Yaklaşımını Kullanarak Belediye Dağıtım Hattının Mikrobiyolojik Stabilite Değerlendirmesi

Abstract

Background: The microbiological quality of municipal water is an important inspection characteristic that must be carefully monitored and controlled to ensure the delivery of acceptable water that is safe for human activities, consumption and further processing. Case presentation: The current case demonstrated the implementation of a special type of attribute control chart for the examination and analysis of long-term data trends of water distribution in a healthcare facility from different pints-of-use. All datasets showed a right-skewed dispersion pattern of data indicating solitary intermittent high values but without any observable Out-Of-Specification (OOS). All water lines failed to follow any known distribution pattern without the need for transformation which had improved the normality and removed the outliers from datasets. The direct approach for visualizing the record of microbiological results was accomplished using Laney-attribute charts. Discussion: Each use point had its unique trend of data by visualizing the mean, pattern, the Upper Control Limit (UCL) and the alarm types. The net quality of the water distribution system in the facility could be deduced from the overall readings that had been averaged and pooled in a single process-behavior chart. Implementation of this trending chart showed a tendency of oscillation pattern for bioburden count that tended to seize in amplitude with possible signs of seasonality. Conclusion: In general, the overall biological stability is improving with time in terms of the Total Microbial Aerobic Count (TAMC). The Bioburden level and the magnitude of fluctuations were decreasing according to the latest monitoring state.