Industrial trash is burned to prevent the discharge of harmful and chemical chemicals into the environment as well as to reduce volume and landfill costs. Sometimes energy from the waste combustion is recovered and used for electricity or heating. Industrial Waste Incinerators can be categorised as any device or system that uses thermal oxidation and/or combustion to eliminate or reduce industrial waste. The majority of municipal, industrial, commercial, and institutional wastes are categorised based on their composition and heating value. Industrial waste comes in a wide variety of compositions. Industrial waste is any undesirable hazardous or chemical waste, such as acids, alkalis, halogenated substances, fuels, oils, and greases, spent filter materials, animal and food wastes, as well as other potentially harmful substances. Sometimes waste can be used to recover energy.