Treatment of Detergent Industries Wastewater

Surfactants are the most important gradients in detergent products. Environmental pollution can be caused due to the use of alkyl benzene sulfonate, if the wastewater is not treated. For this reason, chemical and physical methods of treatment should be employed. In this work wastewater treatment of one of the detergent industries in Iran containing surfactants are considered and treatment with use of chemical, physical and biological methods has been compared. In the chemical method, the best coagulant were, lime with alum which caused a 90% reduction of COD. Dissolved Air Flotation (DAF) as a physical procedure was employed and which 8.26% reduction of COD occurred. Biological method was based on the use of Sequencing Batch Reactor (SBR) which led to an 86% reduction of COD. Effluent water after treatment can be used for agricultural, landscape irrigation and garden watering.

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Keywords: Industrial ، Pollution ، Surfactants ، Treatment