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Sludge vs. Slurry: What’s the Difference?

January 5, 2020
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Are you curious about the difference between sludge and slurry? You may use the words interchangeably, but they are not the same thing. They are both by-products of similar processes in industrial, refining, and wastewater industries.


While they might be produced from similar processes, sludge and slurry are different, from their texture to their components. Sludge is thick and soft, more like thick mud. Sludge is also a term used for solids that are separated from suspension in a liquid. On the other hand, slurry is thin and messy. It can be considered flowable suspension in liquid. Both are a mixture of liquids and solids. The materials may be hazardous or non-hazardous. They may be full of biosolids or debris, or oil or mud.


Because the products are different and contain different contaminants, they need to be dealt with a little differently depending on their content. Contaminants should be removed from the product in a dewatering or filtration process. Depending on whether there are harmful contaminants or biosolids containing organic matter, the resulting slurry or filter cakes will need to either be disposed of or reused (such as in the agriculture industry). The remaining water should be treated. The process can be messy, but it’s important to take care of it and effectively recycle and reuse the product (if able).


We help customers take control and deal with their slurry problems. Be the boss of your slurry! Take charge and give us a call today at 320-529-4035.