Application of the Mathematical Simulation Methods for the Assessment of the Wastewater Treatment Plant Operation Work Reliability

Dariusz Młyński,Anna Młyńska,Piotr Bugajski

doi:10.3390/w11050873

Dariusz Młyński, Anna Młyńska + Show 1 more

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https://doi.org/10.3390/w11050873

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Abstract

The aim of the present work was the modeling of the wastewater treatment plant operation work using Monte Carlo method and different random variables probability distributions modeling. The analysis includes the following pollutants indicators; BOD5 (Biochemical Oxygen Demand), CODCr (Chemical Oxygen Demand), Total Suspended Solids (SSt), Total Nitrogen (TN), and Total Phosphorus (TP). The Anderson–Darling (A–D) test was used for the assessment of theoretical and empirical distributions compatibility. The selection of the best-fitting statistical distributions was performed using peak-weighted root mean square (PWRMSE) parameter. Based on the performed calculations, it was stated that pollutants indicators in treated sewage were characterized by a significant variability. Obtained results indicate that the best-fitting pollutants indicators statistical distribution is Gauss Mixed Model (GMM) function. The results of the Monte Carlo simulation method confirmed that some problems related to the organic and biogenic pollutants reduction may be observed in the Wastewater Treatment Plant, in Jaworzno.

Highlights

The dynamic development of water supply and sewage systems that has been observed in Poland for many years contributes to the discharge of a large amount of sewage
A–D test was used for the assessment of theoretical and empirical distributions compatibility
Based on the results obtained using peak-weighted root mean square (PWRMSE) parameter, it was stated that the best-fitting random variables statistical distribution is Gaussian Mixture Model (GMM) function

Summary

Introduction

The dynamic development of water supply and sewage systems that has been observed in Poland for many years contributes to the discharge of a large amount of sewage. The sewage is defined as the community’s spent water. It mainly consists of pure water (over 98%), it contains waste of almost every form and description, with the remainder being dirt. 25% of the pollutants in normal domestic sewage are in suspension and 75% in solution. Sewage contains many complex organic and mineral compounds. The organic portion of sewage is biochemically degradable and, as such, is responsible for the offensive characteristics usually associated with sewage

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