There are various methods for recycling and reusing waste materials. Dry processes, such as hand sorting, and wet processes, like gravity separation, can be used. Coagulation-flocculation and dissolved air flotation have proven to be effective in treating industrial wastewater. Additionally, dust collected from gas-cleaning facilities can be reused in road construction. Reuse, incineration, and composting are other waste management methods, each with their own economic and environmental benefits.