Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Simultaneous Removal of Ammonium and Nitrate by Natural Zeolite and Bacteria

천연 zeolite와 미생물을 이용한 NH4+ 및 NO3-의 동시 제거

  • Lee, Seon-hee (Department of Chemical Engineering, Chungnam National University) ;
  • Lee, Ji-Hye (Department of Chemical Engineering, Chungnam National University) ;
  • Kim, Duk gyum (Department of Chemical Engineering, Chungnam National University) ;
  • Lee, Chang-Soo (Department of Chemical Engineering, Chungnam National University) ;
  • Kang, Kyung Suk (Siontech Co., Ltd.) ;
  • Kim, In Ho (Department of Chemical Engineering, Chungnam National University)
  • Received : 2008.04.08
  • Accepted : 2008.05.12
  • Published : 2008.10.31
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Abstract

Water pollution by ammonium ion and nitrate is a common and growing problem in the ecosystem. Process of biological removal consists of nitrification and denitrification by bacteria. Ammonium is oxidized generally to nitrate by nitrification and nitrate is reduced to dinitrogen gas in the subsequent denitrification process. Although natural zeolite is well known for its ability to preferentially remove ammonium, it is not sufficiently removing ammonium ion and nitrate by adsorption. In order to overcome this problem, a method of biological removal with zeolite is used for simultaneous removal of ammonium and nitrate. As a result, in case of shaking culture with 1% seed and passing through zeolite column, the process revealed that ammonium ion could be removed completely after 14 hours. The removal of nitrate using columns with naturally adsorbed bacteria onto zeolite reached approximately 100% after 4 hours.

현재 암모늄과 질산이온에 의한 수질 오염은 생태계에 있어 심각한 문제로 떠오르고 있다. 미생물에 의한 생물학적인 제거 공정은 질화 과정과 탈질 과정으로 구분되는데 암모늄이온은 질화 과정에 의해 질산염 이온으로 산화되고 질산염 이온은 다음 단계인 탈질 과정에서 질소 기체로 되어 제거 된다. 천연 제올라이트는 양이온 교환능이 뛰어나 암모늄이온($NH_4{^+}$)의 제거에 우수한 것으로 알려져 있지만 흡착만으로 암모늄과 질산이온($NO_3{^-}$)을 충분히 제거할 수 없다. 이러한 문제를 해결하기 위해 제올라이트와 미생물을 이용해 생물학적인 방법으로 암모늄과 질산이온을 동시에 제거하기 위한 실험을 수행하였다. 암모늄이온의 제거는 분말형 Beneficial bacteria(Savio, USA)의 종배양 단계를 거쳐 제올라이트가 충진된 컬럼과 진탕배양을 동시에 하였을 경우에 14시간 후에 완전히 제거되었고 질산이온은 제올라이트에 미생물을 자연 흡착시켜 컬럼 처리시 4시간 후에 100% 제거됨을 확인하였다.

Keywords

Acknowledgement

Supported by : 한국산업기술재단

References

  1. Anderson, I. C. and Levine, J. S., "Relative Rates of Nitric Oxide and Nitrous Oxide Production by Nitrifiers, Denitrifiers, and Nitrate Respiresrs," Appl. Environ. Microbiol, 51, 938-945(1986)
  2. Strotmann, U. J. and Windecker, G., "Kinetics of Ammonium Removal with Suspended and Immobilized Nitrifying," Chemosphere, 35(12), 2939-2952(1997) https://doi.org/10.1016/S0045-6535(97)00341-X
  3. Song Jun Sang, "Wastewater Treatment Bacteria," Jayu Academi(1995)
  4. Kim, S.-A., Hong, J.-S., Suh, J.-K., Kang, H. and Lee, J.-M., "A Basic Study on the Simultaneous Removal of Ammonium and Nitrate using Zeocarbon," J. of KSEE, 27(1), 109-114(2005)
  5. Weon, S.-Y. and Lee. S.-I., "Removal Nitrogen and Phosphorus from Wastewater using Natural Zeolite and Iron Oxide," J. KSWQ, 20(2), 107-109(2004)
  6. Lee, H. S., Yoon, T. I. and Kim, C. G., "The Effect of Clinoptilolite Addition on Nitrification in Activated Sludge Process," Korean J. Chem. Eng., 39(4), 488-492(2001)
  7. Jorgensen, T. C. and Wealtherley, L. R., "Ammonia Removal from Wastewater by Ion Exchange in the Presence of Organic Contaminants," Wat. Res., 37(8), 1723-1728(2003) https://doi.org/10.1016/S0043-1354(02)00571-7
  8. Sanchez, E., Milan, Z., Borja, R., Weiland, P. and Rodriguez, X., "Piggery Waste Treatment by Anaerobic Digestion and Nutrient Removal by Ionic Exchang," Resour. Cons. Recycl., 15, 235-244(1995) https://doi.org/10.1016/0921-3449(95)00033-X
  9. Booker, N. A., Cooney, E. L. and Priestley, A., "Ammonia Removal from Sewage using Natural Australian Zeolite," Water Sci. Technol., 34, 17-24(1996)
  10. Lanari, D. and Franci, C., "Biogas Production from Solid Wastes Removed from Fish Farm Effluents," Aqua. Liv. Res., 11, 289-295(1998) https://doi.org/10.1016/S0990-7440(98)80014-4
  11. Lind, B. B., Ban, Z. and Byden, S., "Nutrient Recovery from Human Urine by Struvite Crystallization with Ammonia Adsorption of Zeolite and Wollastonite," Bioresour. Technol., 73, 69-74(2003)
  12. Lahav, O. and Green, M., "Ammonium Removal using Ion Exchange and Biological Regeneration," Wat. Res., 32(7), 2019-2028(1998) https://doi.org/10.1016/S0043-1354(97)00453-3
  13. Zhang, L.-S., Wu, W.-Z. and Wang, J.-L., "Immobilization of Activated Sludge using Improved Polyvinyl Alcohol (PVA) Gel," J. Environm. Sci., 19, 1299-1297(2007)