Vanish coating is usually applied to protect the surface and add the value of printed products. Water-based coatings have become popular in the printing industry because of their environmentally friendly and odorless. However, high volume of wastewater from many coating plants need to be treated with low cost. The objectives are to survey the source of wastewater in a coating plant and to find the proper technique of wastewater treatment by using their wasted materials. Two sources of contaminant; water-based varnish and water-based glue, in wastewater were mixed in various ratios to determine the results of coagulation and adsorption. The results showed that 45 L of wastewater mixing from 2 sources (1:1) could be treated by adding 250 mL of wasted ferric chloride solution, stirring for 1 minute and leaving for sedimentation. The sludge was separated by filtering with the wasted mesh cloth and dried by sun. The remaining color of water was further removed through the adsorption column containing the wasted granule activated carbon. The water qualities was detected for chemical oxygen demand (COD), total dissolved solids (TDS), suspended solid (SS) and pH value. After coagulation process, COD, TDS and SS were reduced from 58,902, 30,424 and 772 mg/L to 7,384, 3,192 and 54 mg/L, respectively, and pH was decreased from 7.6 to 5. After adsorption process, COD, TDS and SS were reduced to 23, 597.3 and 6.6 mg/L, respectively, and pH was increased to 7.13. The qualities of treated water were accepted under standard criterion of industrial effluent.
Suchapa Netpradit, King Mongkut’s University of Technology Thonburi, Thailand
Areeya Poolsawat , King Mongkut’s University of Technology Thonburi, Thailand
Utaitip Noibut, King Mongkut’s University of Technology Thonburi, Thailand
Stream: Environmental Sustainability & Human Consumption: Waste
This paper is part of the ACSEE2017 Conference Proceedings (View)
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