Abstract
This study develops an ecofriendly and inexpensive biological treatment for high-salinity wastewater. The marine bacteria Bacillus sp. KGN1 and Vibrio sp. KGP1 show removal efficiencies of 75.3 and 65.4% for chemical oxygen demand by the dichromate method (), 91.3 and 92.0% for (ammoniacal nitrogen), and 90.6 and 84.6% for (phosphate), respectively, during batch mode for 12 h in 3.5% saline artificial wastewater. The lab-scale sequencing batch reactor (SBR) system with marine bacteria–supplemented aerobic granule sludge (AGS) is operated under the following conditions: 12 h hydraulic retention time (HRT), 20 days solid retention time (SRT), 6 h per cycle, mixed liquid volatile suspended solid (MLVSS), and treatment amount per day (Q). The system has an average removal efficiency of 79.8%, a removal efficiency of 91.5%, and a removal efficiency of 76.5% in 3.5% saline synthetic wastewater including 400 mg , 10 mg , and 5 mg . The results indicate that the SBR biological system with AGS supplemented with high-efficiency marine bacteria is effective for treating saline wastewater containing a high concentration of salt.
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Acknowledgments
This work was supported by the National Research Foundation of Korea under Grant Nos. NRF-2013M3A2A1067498, NRF-2015M3A9B8029697, and NRF-2017M3A9B8065734. Marine bacteria KGN1 (KEMB 3401-006) and KGP1 (KEMB 3001-129) were obtained from Korea Environmental Microorganisms Bank, South Korea.
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©2018 American Society of Civil Engineers.
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Received: Feb 10, 2017
Accepted: Oct 4, 2017
Published online: Feb 22, 2018
Published in print: May 1, 2018
Discussion open until: Jul 22, 2018
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