Treatment of cotton textile wastewater using lime and ferrous sulfate.
This technical note summarizes the results of a textile wastewater treatment process aiming at the destruction of the wastewater's color by means of coagulation/flocculation techniques using ferrous sulfate and/or lime. All the experiments were run in a pilot plant that simulated an actual industrial wastewater treatment plant. Treatment with lime alone proved to be very effective in removing the color (70-90%) and part of the COD (50-60%) from the textile wastewater. Moreover, the treatment with ferrous sulfate regulating the pH in the range 9.0+/-0.5 using lime was equally effective. Finally, the treatment with lime in the presence of increasing doses of ferrous sulfate was tested successfully, however; it proved to be very costly mainly due to the massive production of solids that precipitated.
Georgiou
D
D
Department of Environmental Engineering, Demokritos University of Thrace, Xanthi GR-67100, Greece. dgeorgio@env.duth.gr
Aivazidis
A
A
Hatiras
J
J
Gimouhopoulos
K
K
D017610:Calcium Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D032561:Cotton Fiber; D005160:Facility Design and Construction; D005296:Ferrous Compounds / Q000737:chemistry*; D005427:Flocculation; D010087:Oxides / Q000737:chemistry*; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*
D017610:Calcium Compounds; D004396:Coloring Agents; D005296:Ferrous Compounds; D010087:Oxides; C020748:ferrous sulfate; C016538:lime