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Filter presses are powerful industrial equipment that separates solids from liquids using pressure filtration. Slurry, a sludge-like mix of solid and liquid, is pumped into the machine and separated under pressure. This leaves the water purified and the solids clinging to cloth. Think of it as a huge high-powered colander. The smallest amount of solid, things like dust and mineral, is caught after being "pressed" through fine sifting plates. A filter press can be used for water and wastewater treatment, mining, and medical purposes. Let's take a quick look at how a used filter press operates. The slurry, the mix of solid and liquid, is pumped into the press. As pressure builds, slurry is passed through the straining plates. The solid part of the mixture starts to build up on the filter cloth. At first, the cloth won't be able to catch all the solids being passed through. But as more and more solid builds up on the cloth, a layer of filter cake starts to build up, creating a sort of wall of particles. This layer does most of the purifying, as it can catch more and more of the solid as the slurry passes through. Once the cloths are full of cake, the cycle is complete, and you'll be left with de-watered solid product and purified water. There are numerous types of used filter presses, but the first of its kind was used in Great Britain in the 1850s to obtain seed oil. The first prototype that led to the modern incarnation of the machine was made in the 1950s. It has remained largely unchanged since though it has found many uses outside of its first intended use. Although industrial in nature, a used filter press has application in the maple syrup business. When the syrup is first collected from the trees, it often comes with lots of sand, dirt, and even excess sugar. The syrup is heated to almost 200°F, passed through the machine and presto! You've got syrup. Similar processes are used for the honey and beer brewing industries. The applications for press filters in the future are important to the developing world. As more and more people on Earth start to move towards cities or urbanize traditionally rural areas, there will be an increased need for clean, safe water. "Super high powered" filters will be needed in areas with limited access to already clean water, or in regions where there are recurrent droughts. This process can provide a healthier condition of living for many across the globe. When looking for a used filter press, residents visit M.W. Watermark. Learn more at http://www.mwwatermark.com/Home.aspx.
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