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

Table 1

Pilot-scale study of real textile wastewater treatment.

		Final dye concentration according to the limitations of Vietnam standards
		Column A^a (50 ppm)	Column B^b (150 ppm)
Calculated values	Removal (%)^c	96.39	89.16
	Dosage of C. fistula seed gum (g·L^−1)^d	1.17	1.02
Results obtained from pilot-scale study	Real pilot-scale percent removal of color (%)	93.83	85.87
	Final concentration of color (ppm)	85.33	195.33

^aThe national technical regulation on the limits for industrial wastewater (QCVN 40:2011/BTNMT) discharging into the water sources serving tap water supply [36, 37]. ^bThe national technical regulation on the limits for industrial wastewater (QCVN 40:2011/BTNMT) discharging into the water sources not serving tap water supply [36, 37]. ^cRequired percentage removals to ensure national technical regulation on the limits for industrial wastewater. ^dThe coagulant dosage for the pilot-scale study calculated based on linear plot of percentage removal and dosage found in the bench-scale experiments.