In chemical dosing systems which are used at different points such as waste water treatment or sludge dewatering systems, the chemical to be dosed must be prepared in before. Automatic chemical preparation units are used to ensure the continuity of the system. Automatic chemical preparation units are used to ensure the continuity of the system. Automatic Poly Units are compact unit where the preparation and dosing steps of the chemical to be used together. The unit has a powder polyelectrolyte feed point, preparation of solution preparation and dosing steps. 

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