Mobile brine container with a special filtering System to collect and filter returning brine from the injector. It can be directly connected to the mixing- and/or storage system for a continuous flow of brine to the injector. A pump transfers the brine to the product passing the injector. The return-flow from the brine collector of the injector passes a special filtering drum and is returned to the Rotofilter for further use. Therefore no loss of costly brine.