Treatment of RO Rejects Wastewater by Integrated Coagulation Cum Adsorption Process
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Department of Civil Engineering, Sethu Institute of Technology, > Kariapatti, Virudhunagar, Tamil Nadu – 626115
Department of Civil Engineering, Nadimpalli Satyanarayana Raju Institute of Technology, Visakhapatnam, Andhra Pradesh – 531173
Department of Civil Engineering, PSNA College of Engineering and Technology, Dindigul, Tamil Nadu – 624 622
Department of Chemical Engineering, GMR Institute of Technology, Rajam, Srikakulam, Andhra Pradesh – 532 127
Department of Civil Engineering, GMR Institute of Technology, Rajam, Srikakulam, Andhra Pradesh – 532 127
Department of Civil Engineering, V.S.B Engineering College, Karur, Tamil Nadu, India – 639 111
Department of Civil Engineering, Saveetha Engineering College, Saveetha Nagar, Chennai, Tamil Nadu – 602 105
Department of Electrical and Electronics Engineering, Thamirabharani Engineering College, Tirunelveli – 627358
Submission date: 2020-07-22
Final revision date: 2020-10-28
Acceptance date: 2020-11-06
Online publication date: 2021-07-13
Publication date: 2021-07-29
Corresponding author
M. Senthil Kumar   

Civil Engineering Department, Sethu Institute of Technology, Pulloor, 626115, Kariapatti, India
Pol. J. Environ. Stud. 2021;30(5):4031-4038
This research proposed to treat the RO rejected wastewater in a household plant by the integrated treatment system. The possibility of wellhead water treatment by the combined treatment system of coagulation and adsorption for salinity reduction via flexible high recovery RO system was evaluated through analysis of treatment options on a laboratory scale. The naturally available gooseberry seed used as a coagulant in phase-1. It reduced 99.3% of TDS and hardness. It also increases the DO level of RO reject water, at the same time it increases turbidity and color. Turbidity and color removed by surface-modified zeolite in the phase-2. The zeolite material was taken in temperature 400ºC as adsorbent of 6 cm column achieved 8NTU in 150 mmin. The 12 cm column was achieved 7.5NTU in 150 mins. Thomas and Thomson modelling well fitted with an experimental study. The regression correlation reached up to 0.942, 0.9810 and 0.984. It is apparent from the recorded SEM patterns study. This study concludes that the coagulation by Goosperry seed produced the highest removal of TDS and hardness and in the adsorption process, with 400ºC enhances the surface morphology and porous structure indicates that heating with higher-level temperature enhances the adsorption capacity of the adsorbent material. The highest efficiency is observed in hydrothermal hotness.
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