Application of acid mine drainage for coagulation/flocculation of microalgal biomass
- Application of acid mine drainage for coagulation/flocculation of microalgal biomass
- 세이드 살라마; 김중래; 지민규; 조동완; 레다아브샤도; 알킬 카바라; 전병훈
- Acid mine drainage; Coagulation/flocculation; Microalgal floc; Zeta potential
- Issue Date
- Bioresource technology
- VOL 186, 232-237
- A novel application of acid mine drainage (AMD) for biomass recovery of two morphologically different microalgae species with respect to AMD dosage, microalgal cell density and pH of medium was investigated. Optimal flocculation of Scenedesmus obliquus and Chlorella vulgaris occurred with 10% dosage of AMD at an initial pH 9 for both 0.5 and 1.0 g/L cell density. The flocculation efficiency was 89% for S. obliquus and 93% for C. vulgaris. Zeta potential (ZP) was increased from 10.66 to 1.77 and 13.19 to 1.33 for S. obliquus and C. vulgaris, respectively. Scanning electron microscope with energy-dispersive X-ray of the microalgae floc confirmed the sweeping floc formation mechanism upon the addition of AMD. Application of AMD for the recovery of microalgae biomass is a cost-effective method, which might further allow reuse of flocculated medium for algal cultivation, thereby contributing to the economic production of biofuel from microalgal biomass.
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