NDLI: Effect of Flow Rate, Concentration and Transient—State Operations on the Performance of a Biofilter Treating Xylene Vapors

Content Provider	Springer Nature Link
Author	Rene, Eldon R. Murthy, D. V. S. Swaminathan, T.
Copyright Year	2009
Abstract	Biological treatment systems such as biofilters offer a potential alternative to the existing physicochemical techniques for the removal of volatile organic compounds from gaseous emissions. In this experimental work, continuous phase biofiltration of xylene vapors were performed in a laboratory scale compost biofilter that was inoculated with a xylene-acclimatized consortium. The performance was assessed by continuously monitoring the removal efficiency (RE) and elimination capacity (EC) of the biofilter at loading rates varying between 2–220 g m$^{−3}$ h$^{−1}$. The steady-state removal efficiencies were maintained between 60% and 90% up to a loading rate of 80 g m$^{−3}$ h$^{−1}$. The removal efficiency decreased significantly at loading rates higher than 100 g m$^{−3}$ h$^{−1}$. The pressure drop values were consistently less and insignificant in affecting the performance of the system. The present study also focuses in evaluating the stability of biofilter during shut down, restart, and shock-loading operations. An immediate restoration of biological activity after few days of starvation indicated their capability to handle discontinuous treatment situations which is more common to industrial biofilters. The sensitiveness of the biofilm to withstand shock loads was tested by abruptly increasing/decreasing the loading rates between 9–55 g m$^{−3}$ h$^{−1}$, where, removal efficiencies between 60–90% were achieved. These results prove the resilience of the biomass and the stability of the compost biofilter. Anew, results from kinetic analysis reveal that, steady-state xylene removal in the biofilter can be adequately represented by Michaelis–Menten type kinetics, and the kinetic constants namely, EC$_{max}$ (120.4 g m$^{−3}$ h$^{−1}$) and K $_{s}$ (2.21 g m$^{−3}$) were obtained.
Starting Page	79
Ending Page	93
Page Count	15
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	211
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-12-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Compost biofilter Xylene Elimination capacity Removal efficiency Shock-loading conditions Shut down and restart operations Michaelis–Menten kinetics Climate Change Hydrogeology Soil Science & Conservation Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Environment
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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