Water quality comparison for various drainage systems for 2000 equivalent population

P Hlustik,J Raclavsky

doi:10.1088/1755-1315/444/1/012019

Abstract

The article deals with the comparison of wastewater quality in gravity and alternative drainage systems. The gravity drainage systems include combined and sanitary sewerage systems, the alternative systems encompass pressure and vacuum sewerage systems. The difference in the quality of wastewater conveyed to a wastewater treatment plant is influenced by the relevant sewerage system, its technical condition and regular maintenance. The objective of the article is to highlight the differences in wastewater quality with respect to BOD, COD, SS, NH4, Nt and Pct indicators based on the chemical analyzes conducted over several years of operation. The comparison is made for selected municipalities in the Czech Republic in 2005-2019 for various sewerage systems.

Highlights

Drainage systems in municipalities up to 2000 equivalent inhabitants and the correct choice of sewerage type are always very important
We consider as the conventional drainage systems in the area of interest in the Czech Republic a combined or separate sewerage system based on gravity, nonpressure principles of wastewater transport
The existing standards and the existing approach to wastewater designs do not take into account the wastewater transport method and the calculations are based on the same design values related to polluted wastewater production

Summary

Introduction

Drainage systems in municipalities up to 2000 equivalent inhabitants and the correct choice of sewerage type are always very important. We consider as the conventional drainage systems in the area of interest in the Czech Republic a combined or separate sewerage system based on gravity, nonpressure principles of wastewater transport. The wastewater treatment plant design must take into account various hydraulic and material loads in relation to the relevant type of sewerage. 2. Drainage systems To select an investment variant, it is important to have information related to the sewerage operation which is often crucial for selecting one of the compared variants. Gravity drainage systems Combined and separate drainage systems with gravity wastewater transport are considered as conventional methods of wastewater transport for continuous drainage in the relevant areas.

Published under licence by IOP Publishing Ltd

Combined sewerage Sanitary sewerage Pressurized sewerage Vacuum sewerage

Conclusion