Studies Related to the Biological Treatment of Wastewater within the Wastewater Treatment Plant of Iași City

Abstract

This paper includes an analysis of the biological treatment process existing within the water supply and sewerage of Iași City. The main objective of biological treatment is the removal of solid organic substances from wastewater, the stabilization of sludge, the reduction of nutrients loads etc. The Iași City Wastewater Treatment Plant was developed in several stages since year 1968. Nowadays, the facility operates at a design flow rate of 4 m3/s during dry weather and 8 m3/s during heavy rainfalls. This study is focused on the following aspects: wastewater treatment plant’s diagram, the wastewater parameters inside the treatment plant, the biological treatment process analysis and a few conclusions.

Sustainability Analysis of a Municipal Wastewater Treatment Plant through Emergy Evaluation

“…The Ias , i MWWTP was developed in stages, since 1968 [41]. In 2015, the wastewater treatment lines were fully refurbished and upgraded, to reach an increased capacity: from 190,000 m 3 /day and 37,300 kg BOD/day to a maximum flow of 280,000 m 3 /day and 56,000 kg BOD/day [42]. A tertiary treatment (comprising nitrogen and phosphorous removal) was implemented, with the purpose to prevent eutrophication of the surface water, where the wastewater is discharged, or to facilitate wastewater recycling [12,41].…”

“…The wastewater treated by the Ias , i MWWTP follows the process flow, presented in Figure 2, and consists of the following treatment stages [2,42]:…”