CLEAN WATER TECHNOLOGIES

We supply complete systems for industrial and municipal wastewater treatment plants.

See our products

About us

TREST is a team of engineers delivering process engineering projects for wastewater treatment plants – from design and manufacturing through to commissioning and service.

2003

TREST Wojciech Czajkowski founded

The company began operating on 1 August 2003 and has been consistently active in the water and wastewater sector for over 23 years. Over the years, it has established itself as a supplier and distributor of specialist equipment for the wastewater treatment sector throughout Poland.

2016

Product range expanded

New equipment added to our range – reliable multi-disc screw presses.

2020

Service operations launched – DM SERW founded

Servicing and repair of wastewater treatment plant equipment; routine, warranty and post-warranty inspections.

2025

Our track record

In 22 years of operation, we have supplied equipment to more than 1,500 wastewater treatment plants across Poland.

What we offer

Blowers

Stable flow of air or gas. Simple, durable design. Resistant to contamination. High efficiency and energy savings. Long service life and low operating costs.

Sludge treatment

Sludge thickening and dewatering. Sludge conveying. Polyelectrolyte preparation units. Hygienisation systems: silos, dosing units. Sludge granulation. Process automation and control.

Mechanical wastewater treatment

Septage receiving stations, compact screening and grit removal units, grit separators, grit washers, drum screens, in-channel screens, hook-type band screens, basket screens, raked bar screens, screw conveyors, service platforms.

Automation / Service

Control panel prefabrication, commissioning and servicing of equipment automation.

Service – DM SERW

Comprehensive service for wastewater treatment plant equipment

Mechanical treatment

Mechanical treatment

Service – bar screens, fine screens, grit separators, screening and grit removal units, septage receiving stations

Aeration

Blowers and aeration

Blower service

Dewatering

Sludge treatment

Service – thickeners, screw presses, belt presses and multi-disc screw presses

Automation

Control systems

Control system service

Our services:

Selected projects

Sulmierzyce wastewater treatment plant

Multi-disc screw press

Supply and installation of a sludge dewatering system

  • Region: Greater Poland Voivodeship
  • Year: 2022
Styków wastewater treatment plant, Brody municipality

Roots blowers

Supply of 4 AR-80/28C-K blowers

  • Region: Świętokrzyskie Voivodeship
  • Year: 2022
Wastewater treatment plant, Wilamowice municipality

Supply and installation of a sludge dewatering system, including electrical and I&C works

Supply and installation of 8 dewatering line units

  • Region: Silesian Voivodeship
  • Year: 2024
Wastewater treatment plant, Iłowo-Osada municipality

Twin-screw multi-disc screw press

Supply and installation of a sludge dewatering system

  • Region: Warmian-Masurian Voivodeship
  • Year: 2025

Contact

TREST Wojciech Czajkowski
+48 602 422 411 +48 604 145 985 (for enquiries in English)
ul. Krasińskiego 14, 05-120 Legionowo, Poland