期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：s
页码：4915-4922
出版社：University of Mohammed Premier Oujda
摘要：The biological process of nitrification-denitrification, involving a tubular plastic biofilter, reduces nitrogen in wastewater. During the process, ionised ammonia (NH4 )and unionised ammonia (NH3) are formed simultaneously in the water. The presenceof NH4 causes the breakpoint of chlorination and the formation of disinfection byproducts(DBPs) in the form of trihalomethana, while unionised ammonia (NH3) istoxic to aquatic organisms. In this study, total ammonia nitrogen (TAN) removalefficiency using a tubular plastic bio filter was 14.31% with pH of 7.89 on the firstday. TAN concentration in the bio filter reactor was 77.08 mg/l, and the NH3-Nequilibrium reached 4.8 mg of NH3-N/l while NH4 -N equilibrium went to 72.2 mg ofNH4 -N/l. In the control reactor, TAN removal efficiency was 12.98%, where theNH3-N equilibrium touched 1.94 mg of NH3-N/l, and the NH4 equilibrium reached76.33 mg of NH4 -N/l with a pH of 7.56. With the rising of the pH, the equilibrium ofthe reaction tends to increase the concentration of the toxic NH3-N.
