Approximately 1-15% of dyes are lost during the dyeing and finishing operations and process water become contaminated with these dyes. In addition to cancerous dyes, the water effluent also contains sequestering agents, surface active agents and inorganic salts such as NaCl, Na2CO3, Na2SO4. These chemicals not only lead to undesired water properties such as high values of COD, TDS, turbidity and pH but also disturb the light transmission, photosynthesis under water and thus water
ecology