It is very effective for extracting acids and metal salts from solutions.Ĩ. This process is used to separate the components of an ionic solution by applying an electric current to the solution, which causes ions to move through the dialysis membrane. ![]() Electrodialysis is an extension of dialysis. ![]() Chemical coagulating agents are often added to encourage the settling of fine particles.ħ. Sedimentation is usually accomplished by providing sufficient time and space in special tanks or holding ponds for settling. Sedimentation is a process for removing suspended solid particles from a waste stream. Screening is a process for removing particles from waste streams, and it is used to protect downstream pre-treatment processes.Ģ. The physical processes that are commonly used in waste treatment operations are as follows:ġ. Physical treatment processes are important to most integrated waste treatment systems regardless of the nature of the waste materials or the ultimate technologies used for treatment or destruction. These processes are very useful for separating hazardous materials from an otherwise non-hazardous waste stream so that they may be treated in a more concentrated form, separating various hazardous components for different treatment processes, and preparing a waste stream for ultimate destruction in a biological or thermal treatment process. Physical treatment techniques are often used to separate the materials within the waste stream so that they can be reused or detoxified by chemical or biological treatment or destroyed by high-temperature incineration. ![]() This includes processes that separate components of a waste stream or change the physical form of the waste without altering the chemical structure of the constituent materials.
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