Subject(s): Organic Industrial Solid -- Inorganic Industrial solid -- Treatment Plant Sludges -- Classification of industrial solid wastes -- Organic industrial solids : Sewage treatment plants, textile industry, animal husbandry industry, sugar industry, pulp and paper industry, fermentation industry, vegetable oil, food and allied industries, agricultural residues, petroleum, petrochemical and fertilizer industries, rubber wastes, plastics -- Inorganic industrial solids : Water treatment plants, engineering industry, nuclear and thermal power plants -- Treatment plant sludges : Industrial wastewater treatment plant sludges, sludge dewatering devices