Energy

Context

To support its biofuel production and environmental goals, ORLEN Południe S.A. invested in a state-of-the-art wastewater treatment plant at its Trzebinia site. The facility needed to treat complex wastewater streams—including industrial, rainwater, and biodiesel effluents—while recovering valuable resources and minimizing environmental impact. The challenge was to deliver a fully automated, safe, and efficient system that could handle diverse influents and support heat and energy recovery.

Solution

Nijhuis Saur Industries (NSI), part of Saur Group, designed and delivered a turnkey wastewater treatment plant for ORLEN Południe S.A. The system integrates multiple treatment stages including CPI separation, flocculation, dissolved air flotation (DAF), biological MBBR, and anaerobic digestion (ECONVERT-DGF). The plant is fully automated and includes intelligent monitoring to ensure optimal performance and environmental compliance. Biogas generated from sludge digestion is reused for heating, supporting ORLEN’s sustainability goals.

Project’s context & challenges

Oril-Leader is a full-cycle poultry farm, producing everything from day-old chicks to broiler meat. The production process includes egg incubation, rearing, slaughtering, and broiler processing. The farm supplies products to Ukraine’s domestic market.

MHP aims to achieve full energy independence using organic farming practices. A key part of this goal is the biogas plant, which converts chicken manure into heat, cooling, and energy—helping MHP move toward energy self-sufficiency.

By the end of 2014, the plant reached full capacity. In 2015, it operated at that level consistently. It remains Europe’s largest biogas facility dedicated to processing chicken manure and slaughterhouse waste.

Project context & challenges

With over 50 years of experience, Azomureș S.A. stands as Romania’s leading producer of mineral fertilizers for agriculture. The company supplies farmers nationwide with high-quality nitrogen (N) and complex NPK fertilizers that support crop productivity and soil health. Construction of the Tirgu Mureș production facilities began in 1962 and expanded in phases over the years. Today, the plant spans approximately 100 hectares in the southwestern part of the city. In 2012, Azomureș joined the Ameropa Group, strengthening its position in both local and international markets.

Azomureș aims to become a greener and more sustainable company. As part of this vision, the company launched a major investment project that includes the construction of a biological wastewater treatment plant. This facility helps protect the local environment by discharging clean, treated water into the Târgu Mureș River. In addition to the wastewater treatment plant, the project also modernizes the urea and ammonia production lines. This comprehensive upgrade ranks among the largest and most advanced industrial developments in Romania, meeting the latest national standards for environmental protection and production efficiency.

Context

A joint venture awarded Unidro, part of Nijhuis Saur Industries, multiple large orders for a giant LNG project in the Middle East. The project includes four new LNG trains, each with a capacity of 8 million tonnes per annum (MTPA) of Liquified Natural Gas. To meet strict process performance and quality requirements, Unidro was selected as the most reliable and experienced partner to deliver integrated water treatment packages.

Solution

Unidro designed and supplied an integrated water treatment solution for the LNG project. The system treats sanitary water, oily water, wastewater, and condensate, using advanced technologies such as MBR, filtration, and carbon adsorption. The CT side stream filters handle nearly 5,000 m³/h per train. The solution ensures compliance with stringent quality standards and supports sustainable operations.

Project’s context & challenges

Rzeczyca Sp. z o.o. is a local company that processes agricultural waste and produces biogas. It owns and operates the Rzeczyca biogas plant, transforming organic materials into clean, renewable energy.

The plant uses heat from its combined heat and power (CHP) units for internal needs. It then uses the remaining energy to dry the solid fraction of the digestate, improving efficiency and sustainability.

Local farmers supply feedstocks such as grass, vegetable waste, distillery vinasse, and industrial by-products. The project focuses on sustainably managing these materials while generating green energy for the local power grid.

Nijhuis served as the general contractor, delivering the full technology package along with civil and electrical works, CHP units, and a direct connection to the grid.

Project’s context & challenges

It is one of the largest and most modern chemical companies in Poland. The company maintains a strong position in both domestic and international markets, thanks to its production of high-quality products such as mineral fertilizers, plastics, liquefied gases, and more.

Ongoing development and facility expansion exceeded the capacity of the existing wastewater treatment plant, which could no longer treat sewage to the required standards. To address this, the company implemented a customized solution that meets increasingly stringent wastewater treatment standards while allowing for greater sewage intake—without the need for additional tank construction. Throughout the project, the company ensured uninterrupted purification processes.

This investment modernized the plant’s wastewater treatment technologies, significantly improving overall efficiency. It also enhanced the removal of biogenic compounds by optimizing nutrient delivery. Additionally, the company developed a response strategy for handling excess nitrogen and organic compound discharges from production facilities.