After the grapes are fermented, the red wine is squeezed into the press and the peel is separated from the wine. Next, the red wine stops filtering and removes the yeast residue. White wine is able to stop the precipitation, sick filter yeast residue. Then according to the type of wine, the wine into stainless steel storage tanks or oak barrels, and finally bottling. If the wine before bottling without filtration, will only increase the cost of the brewing process, liquor in the degree of turbidity is too high, but also obstruction sterile filter cartridge.
When choosing the best filter for your wine, consider the following questions first:
Why filter wine?
Can local provide leasing filtration equipment service?
According to personal budget, suitable for what kind of filter equipment purchased?
Before and after filtering the wine, the need to stop what kind of analysis test?
What is the purpose of filtering wine?
For winemakers, the reason for filtering wines is different, so different types of filtration equipment are chosen according to their needs. In this respect, the choice of equipment will affect the final filtration result.
Filtration can ensure the concentration of the product, improve the novelty of grape varieties, filter out yeast, bacteria to prevent the wine from decaying, make the wine bottled more pure, bright.
In addition, consider when to stop filtering. Filtering juice before fermentation? Or after the fermentation is filtered wine, and then into the oak aging? Or do you just want to clear the wine as it prepares for bottling? On the Filling Consumption Line, can you demand the passage of wine through a sterile filtration equipment?
In fact, the wine must have a turbidity of less than 1 NTU before being bottled through a sterile filter.
What we need to think about next is what filter equipment best suits your needs.
Which filtration equipment to choose?
If you ask any winemaker what kind of filtration equipment to choose from, you get a lot of different choices, different reasons, and this predisposition is mainly based on the following elements:
The purpose of filtering needs to arrive
Wine quality
Capital (capital expenditures hit, from time to time consumption, labor costs)
The efficiency of filtering methods
Sensitivity (in a filter channel, both to filter large volumes of wine, but also to filter small volumes of liquor)
Expected filtration rate (filter a few liters of wine per hour)
For a new style of wine, the amount of filtrate increased or decreased, the current filter device can adapt to the above changes.
There are currently many filtration equipment brands available on the market, so you can find information simply by looking at the supplier section of the Wine & Real Estate Directory of Australia & New Zealand.
In general, the filter wine or fruit juice, choose a lens filter, pressure leaf filter, frame filter press or cross-flow filter. If the filter lees, choose the drum vacuum filter or frame filter press.
The filter press each have their own interests, in determining the resolution of what kind of brand or before buying, must be clearly investigated. The next step is the budget issue, according to their own economic conditions to buy.
Cartridge filter
Cartridge filter is not expensive, is in the internal metal mesh that layer of lax diatomaceous earth, but the filter rate is very low, and easy to pollute the wine.
Pressure leaf filter
Pressurized leaf filters are relatively expensive and require manual handling of freely floating diatomaceous earth. To ensure production, special skilled operators are required to operate operating equipment, so large and medium-sized wineries can think about purchasing this equipment.
Cross-flow filter
Cross-flow technology is not a new technology. Since the early 1960s, it has been widely used in the food processing industry. In the 1980s, the wine industry began to try this technology, but at the beginning of the experiment, it encountered many difficulties, If the wrong flow of equipment is not good operation, take away a lot of wine, increased filtration process Source: winechina.com Oxygen in the wine's solubility and so on, eventually, due to cross-flow technology costs too high, had to switch to low By the end of the 1990s, cross-flow technology was virtually extinct in the wine industry from 2000 to 2001, as long as several large-scale wine consumers used cross-flow technologies by the 1990s.
Last year, Pall Corporation Inc. of the United States newly developed Oenoflow HS, a high-efficiency cross-flow filtration equipment that enables breweries to filter out more wine from lees. Oenoflow HS is a blocked filtration system that minimizes the oxygen content and optimizes the wine's color, aroma, acidity and taste. In addition, the new equipment eliminates the need for diatomaceous earth to stop filtering, resulting in significant cost savings, reduced waste, and labor-saving, eliminating the need for workers who operate, clean and dispose of traditional diatomaceous earth filtering equipment.
Cross-flow filter was originally invested a larger capital, the cost of changing the membrane is also very high, so many small and medium-sized wineries do not use this equipment, but if the brewing of white wine, you can think of rent cross-flow filter filter.
Cartridge lens filter
We found that small cartridge lens filters are perfect for filtering small lots. The lens filter consists of a cylindrical nacelle and a base with clamps. The chamber houses a set of filter mats, which can be assembled according to the flow of the filtrate. Typically 12 in. Filter mats combine to have a surface area of approximately 1.67 square meters On 12 sheets of 40 x 40 cm filter paper (cardboard used in frame filter presses), three 12-inch diameter filter mats have the same filter area as 40 filter sheets.
Drum vacuum filter
Drum vacuum filter has a degree of drum, drum wall openings, drumheads to support plate and filter cloth, constitute the filter surface. Under the filter surface divide a number of separate fan-shaped filter room. Each filter chamber is connected to the distribution valve. Each rotation of the drum, the distribution of each filter through the valve turns the vacuum system and the system of compressed air, the second to complete the filter ﹑ washing residue ﹑ ﹑ dry slag removal and filter media (filter cloth) regeneration and other operations. The lower part of the drum is immersed in the suspension and slowly rotated during filtration. Floating in the suspension of the filter chamber and the vacuum system connectivity, the filtrate was sucked out of the filter, the solid particles are adsorbed on the filter surface to form residue. After the filter chamber is separated from the drum by rotating the drum, the liquid contained in the filter residue is continuously drawn off. When it is required to remove the residual filtrate from the residue, spray the wash water as the filter chamber rotates to the top of the drum. At this time the filter chamber connected to another vacuum system, washed with water through the filter residue layer replacement particles remaining between the filtrate. The filtrate is sucked into the filter chamber and drained separately, then the filter cake which has been drained is removed. At this time the filter room and the compressed air system connectivity, backflush filter loose filter residue, and then scrape scraper residue. Tight air (or steam) to continue to blow back the filter cloth, dredging pores to make it renewable. This filter can handle large, easy to operate, residue can wash the residue, usually used to filter the higher concentration of solid particles suspension.
The biggest feature of the drum vacuum filter is continuous filtration, but because of its complex construction and relatively large size, the device is too expensive for a small brewery and is only used during the brewing period, so that it is possible to think about leasing equipment to filter the spent distiller's grains.
If you have a good purchase of a filter, but also to the supplier to consult the following questions:
You can easily buy spare parts, local maintenance service available.
Think of the purchase of cartridge or frame filter, the future can increase the filtrate flow? In the same filter channel, can filter different levels of filtrate?
Different turbidity of liquor stop filtering, the best filtrate rate and the pressure is how much?
Filter before and after testing
In the beginning before the filter, to measure the turbidity of wine, the following table data provided for the board frame or cartridge filter, for reference purposes only:
Frame filter press
Frame filter is also called cardboard filter, filter media is industrial filter cloth, also called filter press filter cloth is composed of a plurality of filter plates and filter frame alternating arrangement, the filter plate and frame are supported by the bracket in the beam On the board is stainless steel. Filter plate sandwiched between two plastic plates, the filter plate must be aligned with the opening of the plastic plate, in order to ensure the filtrate circulation. The boring filter media soaked in water until the water saturation of the media, it filled the gap between two plastic plates, and then started working. Ordinary small wineries can be 40 × 40 cm filter.
The disadvantage of the device is the edge of the filter plate exposed to the air, the liquor is easily oxidized. And the device did not stop the full blockade, the wine will be horizontal leakage, resulting in waste.
Analysis of wine free sulfur dioxide molecules, to ensure that the wine is not filtered oxidation process.
After the liquor is filtered, measure the turbidity and filterability of the liquor again. If the wine is filtered directly to bottling, put the liquor to the laboratory to stop the filterability test to see if it meets the bottling request. In the long run, these simple tests save you a lot of money. Because once the filter is not full, the formation of wine equipment impurities in the infarct, then maintenance or even shutdown costs are high.
浙江天台丰顿滤料有限公司是一家专业从事：液体过滤袋、工业滤布、滤布、滤袋、除尘袋生产销售的滤布厂家，多年来在液体过滤袋、滤袋、工业滤布、除尘袋生产上积累了丰富的经验和领先的技术。
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