Removal of ammonium nitrogen from wastewater by tertiary treatment
Author:
ŠARKO Julita1ORCID, MAŽEIKIENĖ Aušra1ORCID
Affiliation:
1. Department of Environmental Protection and Water Engineering, Faculty of Environmental Engineering, Vilnius Gediminas Technical University, Vilnius, Lithuania
Abstract
Ammonium nitrogen present in treated wastewater effluent can cause eutrophication. Wastewater treatment
plants do not always meet the strict requirements for the residual total nitrogen concentration – 10 mg/L in the treated
wastewater. Additional wastewater treatment is recommended for higher nitrogen removal efficiency achievement. One
of the ways to remove nitrogen compounds from wastewater is filtration through sorbents filter media. Zeolite is used
to remove nitrogen compounds from water. Zeolite is known for its high surface area and high porosity. Zeolite adsorbs
part of organic compounds and ammonium ions, so their concentration in the filtrate decreases. An ammonium
nitrogen concentration was reduced by filtering wastewater through sorbents filter media during the experiment in real
conditions. Concentrations of treated wastewater pollutants, filtration rate, efficiency of zeolite sorbent to remove ammonium
nitrogen from the wastewater were measured and evaluated. Experiment results showed that ammonium nitrogen
was effectively removed by zeolite sorbent (removal efficiency 66–99%), from wastewater by tertiary treatment.
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