Physical-chemical pre-treatment

A wide variety of raw water sources and raw water qualities are used to produce industrial process water. In order to protect the high-quality and ever scarcer resources for the production of drinking water, industrial water consumers increasingly have to resort to surface water or purified waste water as a source of raw water. To achieve the desired process water quality in these cases, softening or demineralisation is usually required.

The process steps chosen for this, such as reverse osmosis or ion exchangers, can only be used after optimum raw water pre-treatment. This includes removal of turbidity, for which flocculation reactors with downstream high-performance clarifiers (FLOCOPAC®.L) or high-performance flotation unit (FLOTTOPAC®) are installed. Ultrafiltration is also very well suited for this purpose and produces excellent water quality for all subsequent process stages, such as reverse osmosis.

In addition to solids separation, iron removal, manganese removal and TOC reduction are often essential components of process water pre-treatment. The site-specific raw water conditions make an adapted and flexible treatment strategy necessary. This requires broad process engineering expertise. And this is why H+E is the right partner for the task. We supply you with treatment concepts that are economical and tailored to every raw water situation.

Important aspects in the selection of the process sequence:

  • Appropriate analytical evaluation of the raw water composition
  • Simulation of the expected water quality, in particular for organic constituents (TOC)
  • Minimisation of raw water demand and waste water generation


Our references

Germany 2023

Wastewater treatment at a chemical site rich in tradition

InfraLeuna GmbH and its associated companies are the owners and operators of the infrastructure facilities at Leuna, a chemical site rich in tradition. InfraLeuna GmbH pursues the goal of shaping and developing the framework conditions for the production operations of its customers at the site. This involves the supply of necessary media such as energy and water, disposal through the central wastewater treatment plant and analytical services in its modern laboratory.

Austria 2020

High-End UPW Plant for the Semi-Conductor Industry

The task was to implement a high-end ultrapure water plant for the treatment of well water for a well-known semiconductor manufacturer in Central Europe.

Estland 2020

Award Winner: AS Estonian Cell

In 2020, AS Estonian Cell was declared the winner of the competition ”Environmentally Friendly Company of the Year in Estonia“. With H+E components Estonian Cell came a significant step closer to its goal of becoming the best producer of pulp in the world.

Malaysia 2014

Offshore High Pressure High Performance Produced Water Treatment Package

A high-pressure high-efficiency produced water treatment system of Petronas an Sapura Energy designed to meet strict overboard discharge limits while accommodating onerous space and weight constraints imposed by offshore design requirements.

Denmark 2014

Oily Water Treatment Offshore

For an oil rig, Ørsted needed a treatment plant for treating oily water from various sources. Ørsted, Denmark, is the world market leader in offshore wind energy and offers innovative energy solutions for public utilities and industry.

For an oil rig, Ørsted needed an oily water treatment plant to treat water from various sources to remove oil down to <10 mg/l and 95% of solids >100 μm, making the water suitable for discharge into the sea. This application was a particular challenge due to the small droplet diameters and emulsified oils from the various sources. H+E met the challenge by providing their coalescer design with a solids removal system upstream of the coalescer technology.

Germany 2012

New AOP application in a German paper mill

MD Papier GmbH, which belongs to the UPM Group, is one of Germany’s largest manufacturers of high-quality magazine papers. Due to a shift of production to higher-grade and higher bleached products, the percentage of persistent, non-biodegradable wastewater constituents has increased.