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http://dx.doi.org/10.14249/eia.2012.21.5.707

Evaluation of the Effect of High Salinity RO Concentrate on the Microbial Acclimation/Cultivation Characteristics in Biological Wastewater Treatment Process  

Kim, Youn-Kwon (K-water Institute, Korea Water Resources Corporation)
Kang, Suk-Hyung (K-water Institute, Korea Water Resources Corporation)
Publication Information
Journal of Environmental Impact Assessment / v.21, no.5, 2012 , pp. 707-713 More about this Journal
Abstract
There are a lot of parameters affecting microbial acclimation/cultivation characteristics such as dynamic conditions, F/M ratio and substrate affinity. From the process control point of view, the effect of high salinity on the removal efficiencies of BOD and SS have been documented by few researchers. In this research, lab-scale CAS(Conventional Activated Sludge) process and modified $A_2O$(Anaerobic/Anoxic/Oxic) process were operated and monitored to evaluate the characteristics of microbial acclimation and cultivation under high salinity wastewater during the period of three weeks. As a result of acute microbial activity test(6hr) at various $Cl^-$ concentration, the appropriate $Cl^-$ concentration for microbial growth and acclimation ranged under 3,100 mg/l. As a result of acclimation/cultivation test, the trend of COD removal efficiency reduced gradually as time elapsed. It is considered that $NH_4$-N removal phenomenon of the conventional pollutants removal mechanisms gave little effect to the microbial acclimation/cultivation under high salinity wastewater.
Keywords
High salinity wastewater; RO concentrate; Microbial acclimation/cultivation;
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