Design an effluent treatment plant for a textile industry with dyeing operations.

Textile effluent characteristics: high color, COD (1000-3000 mg/L), TDS, varying pH. Treatment train: equalization tank (8-12 hr) for flow/load balancing, neutralization, chemical coagulation (polyaluminium chloride) for color removal, primary clarifier, biological treatment (extended aeration for low F/M), secondary clarifier, tertiary treatment (ozonation/activated carbon for residual color), and sludge handling. Consider: segregation of high TDS streams, dye recovery, and ZLD if mandated. Meet discharge standards: color <50 Hazen, COD <250 mg/L. Membrane systems for water reuse.