In the light of the severe and escalating worldwide water crisis and increasing focus on water consumption, it is evident that the heavy usage of resources by the food and dairy industries needs attention. On this background and driven by our strong focus on sustainability, protection of the environment, and reuse of natural resources, we have developed a number of membrane-based solutions to reduce the environmental footprint of dairy processing plants.
Transportation of milk and whey from one production facility to another contributes heavily to the CO2 footprint of a dairy plant and is very costly.
Concentration of the product by means of reverse osmosis (RO) will, however, remove a very considerable part of the water selectively from the product stream, raising the total solids content of the retentate. Thus, it is possible to transport 3 to 4 times as much dry matter per transportation unit, which saves fuel and CO2. Depending on local legislation, the water recovered by RO can be recycled and reused as process water; this significantly cuts the need for tap water intake and minimises effluent volumes.
In connection with CIP of a process line after production, the first flush water is a mixture of product and water, and this diluted product is often discharged as effluent. However, by means of RO, valuable solids can be recovered from the flush water, increasing revenue, and reducing production wastage to an absolute minimum. As in the case with concentration, the RO water can be reused as process water.
Water Competence Center
Tetra Pak Filtration Systems has established a Water Competence Center focusing on the safe reuse of process water. Read more...