Pilot-Scale Study of Real Domestic Textile Wastewater Treatment Using Cassia fistula Seed-Derived Coagulant

Plant-derived coagulants have exhibited a good potential in wastewater treatment due to their “green” characteristics, high coagulating-flocculating activity, cost-effectiveness, and biodegradability. Nevertheless, research studies focused mainly on bench-scale experiments; pilot-scale full-scale simulations are still limited. Herein, we firstly report study of real domestic textile using Cassia fistula coagulant. The material characterizations Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), dynamic light scattering (DLS) revealed that the natural gum extracted from C. seed possessed rough irregular surface containing molecular weight galactomannan. investigation was initially conducted determine optimal pollutant concentration, initial pH, coagulant dosage coagulation-flocculation process. is an effective for treatment, showing percentage removal 93.83% at volume 30 L 1.17 mg·L−1. Coagulation-flocculation could be efficient primary prior membrane or biological methods meet Vietnamese environmental standards. main mechanisms involve adsorption/bridging interactions via hydrogen bonding electrostatic attraction between negatively charged carboxylate groups positively pollutants.