Recovery of nitrogen from high strength waste stream by using natural zeolite (Clinoptilolite)

천연 제올라이트를 이용한 고농도 질소 회수

  • Received : 2016.01.21
  • Accepted : 2016.02.15
  • Published : 2016.02.28


This paper presents the applicability of natural zeolite (Clinoptilolite) for recovery of ammonium nitrogen from high-strength wastewater stream. Isotherm experiments showed the ammonium exchange Clinoptilolite followed Freundlich isotherm and its maximum exchange capacity was $18.13mg\;NH_4{^+}-N/g$ zeolite. The X-ray photoelectron spectroscopy (XPS) analysis indicated that a significant amount of nitrogen was adsorbed to the Clinoptilolite. Optimal flowrate for recovery of high concentration ammonium nitrogen was determined at 16 BV/d (=19.2 L/min) throughout the lab-scale column studies operated under various flowrate conditions. This study also provided a method to determine the recovery rate of final product of nitrogen fertilizer based on the model application to the lab-scale continuous data.


Clinoptilolite;High-concentration nitrogen;Nitrogen recovery;Zeolite


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