With New Zealand’s move to level 3 businesses are gearing up and looking around for new technologies to help lead us out of the economic slump that threatens.
Certain factors can help ease bad economic outcomes – such as quality and lasting industrial equipment and processes.
The pulp and paper sector is an industry where large quantities of water are used and is, therefore, a key sector for the application of Dissolved Air Flotation technology (DAF). DAF technology answers the need for white-water reuse and pulp recovery within the pulp and paper industries, aiming for zero discharge.
The KWI Group is considered one of the pioneers of Dissolved Air Flotation (DAF) technology and is one of the oldest existing DAF unit manufacturers in the world. The KWI DAF range includes 11 standard models, as well as custom designs, to meet all customer requirements. With nearly 70 years’ experience and the supply of 7000 DAF units for 4700 references globally, the KWI Group is strategically qualified to serve process industries worldwide with quality and lasting equipment.
The main application of KWI DAF units in paper mills:
DAF is mostly used in the pulp and paper industry for treating thermo-mechanical pulp (TMP) filtrates. The process allows for the recovery of water which has already been chemically conditioned for re-use, and conserves any heat energy in the water. It also allows for the recovery of cleaner fibre, as dirt is removed by the washing stages.
Other principal applications include primary wastewater clarification; secondary treatment including sludge thickening and clarification, even tertiary treatment for dissolved air flotation/filtration (DAFF).
In de-inking applications, the ink is removed with the addition of surfactants and the introduction of air by dissolution into the recovered pulp.
For white-water treatment, DAF can be used to separate solids/water and recover fibres and clean water which can be reused in the paper and pulping process.
The Megacell® Horizontal or Vertical (MCH or MCV) are the best solutions.
These innovative DAF units are a compact solution, robust and easy to operate. Even start-up and shut-down phases do not modify their performance.
Costs are also reduced as the DAF flotation process requires less chemical pre-treatment for flocculation to occur. Further savings are achieved because DAF clarifiers are not as expensive to build and install, compared to complex bacterial processes or large settling basins.
Key features and benefits:
- High TSS removal efficiency: 96%-99%
- High hydraulic load: up to 80m3/(m2.h)
- High sludge load: up to 70 kg/(m2.h)
- Small footprint
- Less energy and chemical consumption
- High sludge concentration: up to 5% of solid content
KWI has the most complete and widest range of DAF products of any DAF provider globally. Such a diverse product offering, coupled with accurate and experienced design engineering, delivered via quality manufacturing and supported by excellent customer support, consistently allows KWI to meet all customer needs and be the world’s leading supplier for DAF solutions.
KWI and JIPL specialists have vast expertise and experience ranging from engineering to building and commissioning, and from investment to operation. Let JIPL and KWI work with you during these challenging times to make your project a success!