Buletinul Institutului Politehnic din Iași Secția Chimie și Inginerie Chimică ISSN: 2537-2947
ISSN-L: 0254-7104
2025, Volume 71(75), Issue 4 (December), pp. 27 - 45
Key
Design Parameters for Optimizing Tertiary Wastewater Treatment
ALEXANDRU-ION
PASCARIU, S.C. HYDROPROCONS S.R.L., Iași, Romania, alexandru-ion.pascariu@student.tuiasi.ro MIHAI DIMA, “Gheorghe Asachi”
Technical University of Iași, Faculty of Hydrotechnics, Geodesy and
Environmental Engineering, Iași, Romania MARIUS TELIȘCĂ, “Gheorghe Asachi”
Technical University of Iași, Faculty of Hydrotechnics, Geodesy and
Environmental Engineering, Iași, Romania AANDREEA SILVIA POPA, River Basin
Authorities “Siret”, SGA Vrancea, Focșani, Romania
Abstract The main goal of the work consists in the
optimization from the point of view of energy efficiency and the reduction
of the implementation and operation costs of the advanced (tertiary)
treatment stage of urban and industrial treatment plants, through the
correct choice of the staged sequence of calculation of the still used
primary parameters from the design phase of the tertiary stage component
equipment. In the evaluation of the biological treatment stage within a
wastewater treatment plant, several critical operational and design
parameters must be rigorously analyzed. Primarily, the focus is on
quantifying the concentration of organic pollutants (CBO5) in the influent
to the biological reactor, alongside the total pollutant load, which
includes both organic and inorganic constituents. These concentrations are
essential for dimensioning the reactor and determining the oxygen demand.
Furthermore, a detailed mass balance is performed for nutrients,
particularly nitrogen and phosphorus. Keywords: energy efficiency,
improvement and dimensioning of the parameters.