A review of color and COD removal from textile effluent by coagulation and advanced oxidation processes

Abstract

The textile sector has a long history, and it makes significant contributions to the national economy. Disposing of colored wastewater poses serious environmental risks. Over the past few decades, the elimination of color from textile industries has proven to be quite challenging because it contains a high percentage of organic and inorganic ingredients, which makes it difficult to handle. The textile industry poses a severe environmental hazard due to its heavy use of water. Therefore, wastewater treatment is an environmental challenge. Several wastewater treatment processes are available. However, Research is still ongoing to find low-cost and high-efficiency treatment methods. Keeping in mind the permissible limitations of the wastewater systems, treatment techniques for water consumption are studied again. Recently, coagulation, flocculation, and advanced oxidation processes (AOPs) have been studied for water treatment in textile factories around the globe. There are several treatment options for the waters where AOPs were used for only tissue pretreatment or in combination with biological, physical, and chemical treatments. The objective of this research is to investigate the main variables influencing process effectiveness, namely COD, color BOD, pH, and temperature. According to research, the combination of treatment technologies helps improve water quality and create an environmentally friendly climate, regardless of the physical and chemical characteristics of the effluent.