Cider Filtration
Filtration of apple cider and other fermented products
Prior to filtration, the alcoholic fermentation must be completed and all sugars fermented. Furthermore the cider should be "racked" at least once prior to filtration. Yeast sediments (tank bottoms) and, in cases where fining materials were used (Gelatine, Bentonite etc.), such sediments must be filtered separately from the supernatant liquor. The most modern filtration system for cider is the micro-cross filtration (CMF-filtration). However good results can also be obtained with DE-filtration, either using a horizontal pressure leaf filter or candle filter whichever is more appropriate.
CERINOX® Ceramic cross micro filtration (CMF)
MAIN CIDER FILTRATION: For supernatant liquor we recommend using a CMF-filtration system fitted with ceramic membranes. With such a system, with either a semi- or fully automated control, an almost continuous filtration flow can be achieved. The CMF-plant regulates itself and a minimal amount of manpower is required. A dia-filtration step, at the end of the filtration cycle, is optional and guarantees a maximum yield. The resulting filtration solids (retentate) can, at the end of the filtration run, be added to the tank bottoms (yeast sediments) to be processed separately.
TANK BOTTOMS: Yeast sediments and/or retentate resulting from the main cider filtration, can very successfully be filtered with a CMF-plant fitted with specially designed, large pore size membranes. The solids can be concentrated to a thick and heavy paste. Solid concentration of up to 20% dry matter is possible.
FILTER-O-MAT® / SYNOX® DE-Filtration
In places where the use and the disposal of diatomaceous earth causes no problems, DE-filtration using a horizontal pressure leaf filter or a candle filter, is successful. The filters are available with a semi- or fully automated mode and can be tailor-made to (m2 filter area) to fit almost any flow rate.
NOVOX® Plate and Frame Filter
This filter system can be recommended for all pre-filtered products. The filter can be used, down-stream to the DE-Filter, for medium or fine filtration purposes and/or for the filtration of final products prior to filling or packaging.
FIBRAFIX® Depth Filter Sheets and Washable Sheets
A wide range of filter sheets with different pore sizes are available for the filtration of different products. The range covers coarse filtration, clarifying filtration to sterile filtration, whichever function is required. Filter sheets can be sterilized with hot water and thereafter be re-used for a period of days.
DISCSTAR® Lenticular filtration with Depth Filter Modules
This type of filtration system can be recommended for all products with a high degree of clarity, prior to filtration. The filter can very snugly be built into any pipe system and according to the pore size of the lenticular cartridges (lenticular modules), it can be used as a police filter, polishing filter or for sterile filtration. Lenticular cartridge filters can be drained with ease, can be sterilized with hot water or steam and re-used.