Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Species Specificity Evaluation for Wastewater Treatment Application of Alkaliphilic Microalgae Arthrospira platensis

호염기성 미세조류 Arthrospira platensis의 폐수처리 적용을 위한 종특이성 평가

  • Su-Hyeon, Lee (Department of Applied Environmental Science, Kyung Hee University) ;
  • Jae-Hee, Huh (Department of Applied Environmental Science, Kyung Hee University) ;
  • Sun-Jin, Hwang (Department of Applied Environmental Science, Kyung Hee University)
  • 이수현 (경희대학교 일반대학원 환경응용과학과) ;
  • 허재희 (경희대학교 일반대학원 환경응용과학과) ;
  • 황선진 (경희대학교 일반대학원 환경응용과학과)
  • Received : 2022.08.04
  • Accepted : 2022.11.01
  • Published : 2022.11.30
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Abstract

Since the efficiency of wastewater treatment using microalgae differs depending on the metabolic characteristics of the species, it is important to understand the characteristics of target algae prior to the application in wastewater treatment. In this study, for the application of Arthrospira platensis to wastewater treatment, which is a filamentous alkaliphilic cyanobacteria, basic species specificity was identified and the possibility of application to wastewater treatment was investigated. As a result of the species specificity investigation, the specific growth rate between pH 7.0 and 11.0 showed the highest value near pH 9 at 0.25/day. The reason for the relatively low growth(0.08/day) at pH 11 was thought to be the CA(carbonic anhydrase) enzyme that is involved in carbon fixation during photosynthesis has the highest activity at pH 8.0 to 9.0, and at pH 11, CA activity was relatively low. In addition, A. platensis showed optimal growth at 400 PPFD(photosynthetic photon flux density) and 30℃, and this means that cyanobacteria such as A. platensis have a larger number of PS-I(photosystem I) than that of PS-II(photosystem II). It was speculated that it was because higher light intensity and temperature were required to sufficiently generate electrons to transfer to PS-I. Regarding the applicability of A. platensis, it was suggested that if a system using the synergistic effect of co-culture of A. platensis and bacteria was developed, a more efficient system would be possible. And different from single cocci, filamentous A. platensis expected to have a positive impact on harvesting, which is very important in the latter part of the wastewater treatment process.

Keywords

Acknowledgement

이 논문은 2018년도 정부(미래창조과학부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구이며(No.NRF-2019R1A2C1084155) 이에 감사드립니다.

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