Contents........................................................................................................................................1

Foreword - BURNAR FLORIAN..................................................................2

Optimization of the surface water coagulation process by using the dual system: aluminum sulfate - prehydrolyzed coagulant - GOLOGAN DANIELA..................................................................................................................................4

Portrait - Young professionals - RADU GEORGE ...........................13

In water or air, measure H2S where it matters - right at the source - HACH LANGE..................................................................14

International Conference "Execution and exploitation of sewage networks in the context of climate change", Bucharest, 26-27 April 2023 / International Conference ,,Construction and operation of sewer networks in the context of climate change’’, Bucharest, April 26-27, 2023 - RADULESCU DAN..........................................................................................................................16

A reference moment: Awarding the title of Doctor Honoris Causa of the Technical University of Civil Engineering Bucharest to Mr. Kalanithy Vairavamoorthy, CEO, International Water Association - IWA - ALDEA ALEXANDRU, DIMACHE ALEXANDRU, RACOVITEANU GABRIEL, BURNAR FLORIAN ........................20

The use of organic flocculants in the treatment of sewage sludge - ECO SISTEM PROIECT..................................25

Manage it Manage your critical pipelines with confidence - XYLEM................................................................................................................................................26

Round table "The urban wastewater Directive under revision - provisions and implications''", Bucharest, April 5, 2023 - BURNAR FLORIAN ...........27

Plastics - enemy or friend? / Plastics - enemy or friend? – VAJDA LÁSZLÓ..........30

Interview – Mr. Kenny Khoo, Managing Director, XYLEM ROMANIA / Interview Mr. Kenny Khoo, Managing Director, XYLEM ROMANIA............................................................................33

The postgraduate studies programme “Design of the water supply and sewerage systems” - VULPASU ELENA, RACOVITEANU GABRIEL............................................................................37

Nature based solutions for sustainable and resilient cities - RADU GEORGE, CHEVERESAN MARIA...............................39

GRUNDFOS Romania & Hungary technical visit, Denmark, May 9-11, 2023 / GRUNDFOS Romania and Hungary technical visit, Denmark, May 9-11, 2023 - BURNAR FLORIAN..........50

FADIDA Conference “Involvement of the Interdevelopment Community Associations in the development of local communities”, Pitesti, 07-09 Iunie 2023 / FADIDA Conference ,,Involvement of the Interdevelopment Community Associations in the development of local communities’’, Pitesti, June 07-09, 2023 - DARABAN VASILE..................................................................................................55

Results of the photography competition no. 12 / Results of the photography competition no. 12 - RACOVITEANU GABRIEL ...............................................................................................................60

Piese de racord si cuplaje de tevi / Fittings and pipe couplings - FUNKE KUNSTSTOFFE .....64