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http://dx.doi.org/10.17640/KSWST.2018.26.6.81

Bioreduction Characteristics of Perchlorate in Raw Sewage  

Hong, Seong Hwan (Department of Civil and Environmental Engineering, Wonkwang University)
Choi, Hyeoksun (Department of Civil and Environmental Engineering, Wonkwang University)
Publication Information
Journal of Korean Society of Water Science and Technology / v.26, no.6, 2018 , pp. 81-87 More about this Journal
Abstract
This research was done to investigate the bioreduction characteristics of perchlorate in raw sewage because sewage contains biodegradable organics and various microorganisms for biological perchlorate reduction. Two different types of sewage were tested for biological perchlorate reduction in the flasks. Sewage A was collected from the screening equipment and sewage B was collected from the primary settlement in the municipal wastewater treatment facilities. Perchlorate was completely reduced within 72hours from 8.2 and 10.4 mg/L in the sewage A and sewage B flask tests. When perchlorate and nitrate were added in sewage A, both perchlorate and nitrate were reduced. However, perchlorate and nitrate removal rates were 9.3% and 64.0% at 72hours in sewage B. Perchlorate reduction was significantly inhibited by high salinity(0.5% NaCl) in the sewage A and B. These results showed the sewage has potential for the biological perchlorate reduction in the sewage pipe.
Keywords
Bioreduction; Nitrate; Perchlorate; Salinity; Sewage;
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