Removal of nitrogen compounds from landfill leachate using reverse osmosis with leachate stabilization in a buffer tank.
In this paper, a removal of nitrogen compounds from a landfill leachate during reverse osmosis (RO) was evaluated. The treatment facility consists of a buffer tank and a RO system. The removal rate of N─NH4, [Formula: see text] and [Formula: see text] in the buffer tank reached 14%, 91% and 41%, respectively. The relatively low concentration of organic carbon limits N─NH4 oxidation in the buffer tank. The removal rate for the total organic nitrogen (TON) was 47%. The removal rate in RO was 99% for [Formula: see text], 84.1% for [Formula: see text] and 41% for [Formula: see text]. The accumulation of [Formula: see text] may be the result of a low pH, which before the RO process is reduced to a value of 6.0-6.5. Besides it, the cause for a low removal rate of the [Formula: see text] in the buffer tank and during RO may be free ammonia, which can inhibit the [Formula: see text] oxidation. The removal rates of total inorganic nitrogen and TON in the RO treatment facility were similar being 99% and 98.5%, respectively.
a Department of Environmental Engineering Systems , Bialystok University of Technology , Wiejska 45A Street 15-351 Bialystok , Poland.
Izabela Anna
IA
Talalaj
D017672:Nitrogen Compounds / Q000302:isolation & purification*; D009995:Osmosis; D014865:Waste Disposal, Fluid / Q000295:instrumentation; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D017672:Nitrogen Compounds; D014874:Water Pollutants, Chemical
leachate; nitrogen compounds; purification; reverse osmosis; wastewater treatment