Water treatment and reuse
The treatment and reuse of water has now become a top priority worldwide. In many countries, water scarcity is so great and natural sources so depleted or polluted that it is no longer possible to do it without water treatment systems. For environmental reasons alone, water recycling is now absolutely essential for new construction as well as retrofit and even municipal projects worldwide.
Our water sources include rainwater or surface water, well water, effluent water from small wastewater treatment plants or greywater. Depending on the degree of contamination and treatment technology, different water qualities can be achieved. It can be used to irrigate plants and be fed into the household as process or drinking water. We specialize in decentralized and semi-decentralized systems for all climatic conditions. For over 25 years and in well over 30,000 systems, our customers are now recycling water worldwide, saving several million m³ of water annually. We develop, produce and supply a huge range of products from simple rainwater harvesting for the garden to complex treatment systems for greywater or potable water supply. The systems are used at:
With our systems, it is usually possible to save over 50%, and in some cases even up to 100%, of the original water consumption and thus the water costs. Due to the strongly rising prices and low interest rates, many systems are now even so profitable that an investment pays for itself within a few years. Operator models are possible for larger systems.
Fields of application

Rainwater harvesting
With rainwater, a productive source is available in many areas of the world, providing you with free water of excellent quality.
Learn more about rainwater harvesting for commerce
Learn more about rainwater harvesting for single-family homes

Greywater recycling
In greywater recycling, daily, low-polluted water from showers, hand-washing sinks and the washing machine is treated and reused.
Learn more about greywater recycling for commerce
Learn more about greywater recycling for single-family homes

Potable water production
The quality of rainwater is often so good that it can be made drinkable with just a few treatment steps.
Read more about potable water production and greywater harvesting for commerce
Read more about potable water production and greywater harvesting for single-family homes

Process water from small sewage treatment plants
The discharge water from a small sewage treatment plant can be treated into process water and used for toilet flushing or garden irrigation.
Read more about process water from small sewage treatment plants
Purification stages in water treatment
In the field of water treatment, different filters and filter stages can be used to create different quality levels in the water. These range from process water to potable water.
Source
| Use
| Filter method | |||
---|---|---|---|---|---|
PURAIN / PLURAFIT | AQUALOOP membrane | UV filtration | Activated carbon | ||
Rainwater | Potable water | ♦ | ♦ | ♦ | ♦ |
Irrigation | ♦ | ||||
Adiabatic cooling | ♦ | ♦ | |||
Greywater | Process water | ♦ | ♦ | ♦ | |
Effluent water of a small sewage treatment plant | Irrigation | ♦ | ♦ | ♦ | ♦ |
Process water | ♦ | ♦ | ♦ |
AQUALOOP installation kit
The AQUALOOP installation kit includes a package of components for biodegradation and ultrafiltration, with which various systems for water treatment and reuse can be created in a modular fashion.
- for organically polluted water bioreactor technology for pre-treatment
- disinfection and crystal clear water with unique ultrafiltration with hollow fiber membrane technology
- modular design for any system size
- low maintenance due to integrated backwash technology
- optimal price-performance ratio