The huge increase in online trading worldwide has resulted in enormous demand for brown cardboard and paperboard. These can be easily recycled – but large quantities of organic compounds are discharged with the wastewater from production. The pulp and paper industry demands coordinated methods and the right equipment for wastewater treatment to lower the pollutant loads in the wastewater to a level that allows the treated wastewater to be discharged back into the receiving waters and into the environment.
INVENT, available in New Zealand through JIPL, is committed to the preservation, purification and treatment of water on a global scale. INVENT develops powerful products that contribute greatly to preserving the water quality of our groundwater, rivers, and lakes. INVENT’s unique HYPERCLASSIC®-Mixing and Aeration System is a mechanical aeration system, which has been in use in industrial wastewater treatment plants for over 20 years and provides the solution for the demanding tasks of aerobic wastewater treatment.
The HYPERCLASSIC® – Mixing and Aeration System exhibits its high degree of flexibility when integrated into a wastewater treatment plant.
- All that is needed to operate each unit is an air and power connection. Each unit can feed an entire basin with up to 2,000 Nm³/h air.
- The HYPERCLASSIC® – Mixing and Aeration System can be delivered in a stainless steel cage, making it easy to lift when needed without having to empty the aeration tank. Because of its own weight, it is safely positioned at the installation site.
Because of the specific characteristics of the components of the HYPERCLASSIC® – Mixing and Aeration System, all of the problems in the aerobic process step in the wastewater resulting from paper production are successfully avoided:
- Oxygen is transferred through a ring sparger, which is installed leak-tight above the basin floor. This design ensures a high injection depth and long dwell time of the air bubbles. In addition, the large injection openings ensure many years of aeration operation with no blockages, loss of pressure or efficiency.
- The high injection efficiency or rather the ability to generate fine air bubbles results from the stainless steel ribs on the bottom of the mixer-body. During aeration operation, the mixer-body rotates continuously, producing very fine bubbles in the trail of the stainless steel ribs. They are transferred and distributed laterally, radially into the basin with the mixer flow.
These unique characteristics have made the HYPERCLASSIC® – Mixing and Aeration System the industry standard in the field of aerobic treatment of paper wastewater over the recent decades. INVENT’s efficient, reliable and low-maintenance system is widely installed worldwide – in the largest paper machine in Europe, the most state-of-the-art production plant, as well as specialist manufacturers.
In 2020, a total of twelve HYPERCLASSIC® – Mixing and Aeration Systems have been installed in the Palm GmbH & Co.KG paper mill in Aalen, Germany. Each system distributes up to 1,800 Nm³/h at an injection depth of up to 11.5 m. The overall specification and the selection of materials meet the highest standard for use in the wastewater of a paper factory.
In the video below, you can see the application in the paper mill Palm GmbH & Co.KG: