Application of acid mine drainage for coagulation/flocculation of microalgal biomass

Title
Application of acid mine drainage for coagulation/flocculation of microalgal biomass
Authors
세이드 살라마김중래지민규조동완레다아브샤도알킬 카바라전병훈
Keywords
Acid mine drainage; Coagulation/flocculation; Microalgal floc; Zeta potential
Issue Date
2015-06
Publisher
Bioresource technology
Citation
VOL 186, 232-237
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/49511
ISSN
09608524
Appears in Collections:
KIST Publication > Article
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