Engineering Precise, Cost-Effective Wastewater Solutions

We specialize in the design, construction, and modernization of wastewater treatment plants (WWTPs), ensuring efficient treatment performance, regulatory compliance, and sustainable operation. Our expertise covers conventional large-scale WWTPs, compact WWTPs, and advanced biological treatment technologies, all designed for high efficiency and low operational costs.

Engineering Reliable Wastewater Treatment Infrastructure.

Wastewater treatment requires carefully engineered solutions to ensure proper pollutant removal, resource efficiency, and long-term sustainability. We apply advanced biological, chemical, and physical treatment processes to deliver high-performance wastewater treatment plants that meet strict environmental standards.

Optimized Water Solutions, Designed for Efficiency.

Engineering Reliable Wastewater Treatment Infrastructure.

Expert Execution. Sustainable Water Systems. Guaranteed Results.

Smarter Water Infrastructure Starts with Reliable Wastewater Treatment.

From Contaminated Effluent to Clean Water – We Engineer Solutions.

Wastewater Treatment Services

Design & Construction of Wastewater Treatment Plants

Each wastewater treatment plant is designed based on influent composition, required effluent quality, and cost efficiency, ensuring maximum reliability with minimal operational expenses.

We develop, construct, and modernize:

Conventional (large-scale) WWTPs for cities and municipalities
Compact WWTPs for mid-sized towns and industries
Ultra-compact WWTPs for smaller communities and specialized applications

Conventional Wastewater Treatment Plants (WWTPs)

Our expertise in reconstructing and upgrading large-scale WWTPs ensures reliable operation without disruptions, even during plant modernization.

Designed for cities (100,000+ PE) and high-volume wastewater flows

Sequential treatment process:

Mechanical treatment (screening, grit separation, primary clarification)
Biological treatment (aeration tanks, activated sludge)
Nutrient removal (nitrogen & phosphorus treatment)
Secondary clarification

Compact & Ultra-Compact Wastewater Treatment Plants

For mid-sized and smaller applications, we offer compact WWTP solutions that reduce construction space requirements while maintaining high treatment efficiency.

Optimized for towns up to 60,000 PE or 10,000 m³/d wastewater flow
Integrated mechanical and biological treatment processes
Space-saving modular designs

Advanced Biological Treatment Processes

Our WWTPs use ATV-DVWK-A 131E biological process modeling, ensuring stable performance and compliance with strict discharge limits.

Pressure filtration systems for high-efficiency water purification
Gravity-based treatment plants for cost-effective, large-scale operations
Advanced filtration technologies to remove iron, manganese, and organic matter

Other Wastewater Treatment Technologies

We integrate custom wastewater treatment technologies based on influent characteristics, optimizing performance and reducing operating costs.

✔ SBR (Sequencing Batch Reactor) systems

✔ MBR (Membrane Bioreactor) solutions

✔ USBF (Upflow Sludge Blanket Filtration) for high-load applications

✔ RBC (Rotating Biological Contactor) for low-energy wastewater treatment

✔ Reed bed filtration for sustainable, natural treatment

Key Facts About Our Wastewater Treatment Work

We ensure high-efficiency wastewater treatment solutions, providing reliable, cost-effective, and environmentally sustainable infrastructure.

✔ 8 municipal WWTP reconstructions completed with zero operational failures

✔ Innovative nutrient removal solutions to meet strict environmental regulations

✔ 0% canceled or non-performed projects – Proven project success rate

Advanced Biological Treatment Processes

Strict wastewater regulations require efficient nutrient removal to meet EU discharge standards. Our biological treatment solutions are engineered for maximum efficiency and low energy consumption.

Nitrogen removal

Using pre-anoxic and step-feed denitrification, we reduce nitrogen levels cost-effectively while ensuring stable effluent quality.

Phosphorus removal filtration

Our simultaneous nitrification-denitrification processes allow for efficient phosphorus removal, reducing the need for chemical dosing.

Why Choose Us?

130+

130+ completed water management projects in Lithuania and internationally

100%

100% of designed projects meet declared operational cost expectations

Specialized expertise in procurement, feasibility studies, and technical assessments

Proven track record in EU-funded projects, ensuring full compliance and efficiency

Lets talk

Build Something That Lasts

We design, build, and maintain water, wastewater, and sludge treatment systems, pumping stations, energy solutions, and industrial infrastructure. Whether you need consulting, engineering, installation, or maintenance, we deliver systems that work — efficiently and reliably.

Get in touch

Have questions about water or wastewater projects? Need a reliable partner for sludge, pumping stations, or renewable energy solutions? Our expert team is here to help. We design, build, and operate sustainable systems that stand the test of time — no excuses, no missed deadlines.

Reach out, and let’s discuss how Arginta can meet your engineering needs while keeping costs transparent and outcomes guaranteed.

Call us +370 613 81434

Email info@arginta.lt

Certified company

130+ Completed projects

0 Canceled contracts

34 Years of experience