Paint is a colored liquid or powder composition, the main ingredients of which are organic, metallic, or plastic-based pigments, binders, and thinners (solvents) that form a hard and thin layer by using them for coating, protection, and decorative properties on various material surfaces.
Paints according to their usage areas; are classified as construction paints, aircraft paints, wood paints, floor paints, ship paints, art paints, food paints, auto paints, marking paints, textile paints, metal paints, plastic surface paints.
The wastewater generated in paint factories is caused by cleaning the paint production reactors, mixers, packaging machines, and surfaces in the factory. Paint industry wastewater contains high levels of pollutants such as biological oxygen demand (BOD5), chemical oxygen demand (COD), suspended solids (SS), heavy metals, and color.
Physical, biological, and chemical methods are used in the treatment of wastewater originating from the paint industry. However, before determining the treatment methods, it is necessary to analyze the physical and chemical values of the wastewater.