Press release BoxID: 794983 (ProMinent GmbH)
  • ProMinent GmbH
  • Im Schuhmachergewann 5-11
  • 69123 Heidelberg
  • Contact person
  • Michael Birmelin
  • +49 (6221) 842-270

Powder activated carbon metering

Elimination of man-made trace substances in municipal waste water treatment

(PresseBox) (Heidelberg, ) Man-made trace substances in drinking water are a continually growing problem. These compounds, for example from cosmetics and medicines, which are very resistant to biological decomposition, enter our drinking water reserves through waste water.

In many cases, clarification plants have a fourth cleaning stage to remove this category of impurities and some countries, such as Switzerland, it is required by law.
ProMinent supplies two technologies for the removal of these trace substances from municipal waste water. The proven OZONFILT® systems break down pollutants with ozone. For large-scale elimination with powder activated carbon (PAC), ProMinent has developed a complete system that wets and suspends PAC in a dust-free process and accurately meters it with a multi-screw feeder. The PAC metering system, which consists of a Big Bag emptying unit, a powder storage tank and a multi-screw feeder, will be on show at IFAT 2016 at stand 439/538 in Hall A3.

Tomal®, a company of the ProMinent Group specialising in dry feeding, has developed a special PAC metering unit which meters powder activated carbon volumetrically and with high precision. Unlike gravimetric metering systems, this technology requires no error-prone, maintenance-intensive weighing equipment.

The emptying station is designed for use with both disposable and reusable bags. The Big Bags are suspended in the frame with the aid of a lifting cross bar. The discharge funnel is matched to the bag size used. A special seal ensures that the bags are emptied into the powder storage tank without producing dust. A vibrator is used as a discharge aid and is monitored by the rotary paddle switch below the outlet. The powder storage tank is used to transfer the powder into the volumetric multi-screw feeder. The self-cleaning screw mechanism guarantees smooth, dust-free and accurate metering of the activated carbon. The powder activated carbon is transported to the wetting funnel with a reproducible accuracy of better than 1%.

Thanks to volumetric metering, exactly the required amount of activated carbon is supplied to the process, resulting in optimum adsorption of the trace substances. There is no over-metering with the associated costs. A Venturi mixer adds the suspension produced to the waste water.

There, the activated carbon adsorbs up to 90% of trace substances and slowly settles in a sedimentation tank. This process can be accelerated by adding flocculants. The resulting sludge of activated carbon and precipitant is then processed.

Website Promotion

ProMinent GmbH

For more than 50 years, the ProMinent Group has been a manufacturer of components and systems in the field of fluid metering as well as a reliable solution partner for water treatment.

Based on innovative products, comprehensive expertise in process technology and distinct application orientation, practical solutions are developed for customer-specific requirements. Thereby, ProMinent supports its customers worldwide with regard to safety, efficiency and environmental compatibility.

The Group is headquartered in Heidelberg, Germany. About 2,400 employees in 55 own sales, production and service companies as well as representations guarantee service and availability in more than 100 countries all over the world.

In addition to the treatment of public drinking and waste water, the key sectors include chemical industry, industrial water treatment, food and beverage industry, treatment of swimming pool water and oil and gas industry.

The extensive product portfolio consists of components such as metering pumps, peristaltic pumps, process controllers and sensors for water parameters; products for water treatment such as metering systems for polymers as well as complete metering systems and accessories such as chemical storage containers and transfer pumps. For the process and plant technology used in the oil, gas and energy sectors, the Group provides process metering pumps and plants from its own production.

Under its own brand ProMaqua, ProMinent offers a broad portfolio of environmentally friendly and economic water treatment and disinfection processes with highest efficiency.

The product range comprises chlorine dioxide plants, electrolysis systems, UV systems, ozone systems as well as ultrafiltration systems.

In order to be a dependable long-term partner for its customers, the Group is investing constantly both in product innovation and in state-of-the-art manufacturing processes with a high level of in-house production. 12 worldwide production facilities guarantee a consistently high standard of quality, flexibility and delivery reliability.

More detailed information is available at