Then we compared our results with any non-GMO-related claims. Find a list of all the products we tested in our full report. Genetically modified corn and soy are used in a wide variety of foods. Nearly all of the samples we tested of the products that did not make any non-GMO-related claim on the package did, in fact, contain substantial amounts of genetically modified corn or soy.
Below are the types of water filtration media stocked and distributed by Nalco PTS: 1  Anthracite Filter Coal, AnthrafiltÂ® is commonly used as sub-fill and as a component of multi-media filters. 2  Filter Sand and Gravel is also called Torpedo Sand/Coarse Sand/Support Gravel/Filter Gravel/Pea Gravel.
The shape of the screens depends on the particles that have to be removed. Sand filtration. Sand filtration is a frequently used, very robust method to remove suspended solids from water. The filter medium consists of a multiple layer of sand with a variety in size and specific gravity.When water flows through the filter, the suspended solids precipitate in the sand layers as residue and the water, which is reduced in suspended solids, flows out of the filter.pecific water purification steps are taken, in order to make the water meet current water standards. Purification methods can be divided up into settling of suspended matter, physical/ chemical treatment of colloids and biological treatment.