2015 ; Vol.25-9: 1547~1554
|Author||Byung-Hyuk Kim, Dong-Ho Kim, Jung-Woon Choi, Zion Kang, Dae-Hyun Cho, Ji-Young Kim, Hee-Mock Oh, Hee-Sik Kim|
|Place of duty||Sustainable Bioresource Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-806, Republic of Korea|
|Title||Polypropylene Bundle Attached Multilayered Stigeoclonium Biofilms Cultivated in Untreated Sewage Generate High Biomass and Lipid Productivity|
J. Microbiol. Biotechnol.2015 ;
|Abstract||The potential of microalgae biofuel has not been realized because of the low productivity and
high costs associated with the current cultivation systems. In this study, a new low-cost and
transparent attachment material was tested for cultivation of a filamentous algal strain,
Stigeoclonium sp., isolated from wastewater. Initially, the different materials tested for
Stigeoclonium cultivation in untreated wastewater were nylon mesh, polyethylene mesh,
polypropylene bundle (PB), polycarbonate plate, and viscose rayon. Among the materials
tested, PB led to a firm attachment, high biomass (53.22 g/m2, dry cell weight), and total lipid
yield (5.8 g/m2) with no perceivable change in FAME profile. The Stigeoclonium-dominated
biofilm consisted of bacteria and extracellular polysaccharide, which helped in biofilm
formation and for effective wastewater treatment (viz., removal efficiency of total nitrogen and
total phosphorus corresponded to ~38% and ~90%, respectively). PB also demonstrated high
yields under multilayered cultivation in a single reactor treating wastewater. Hence, this
system has several advantages over traditional suspended and attached systems, with
possibility of increasing areal productivity three times using Stigeoclonium sp. Therefore,
multilayered attached growth algal cultivation systems seem to be the future cultivation
model for large-scale biodiesel production and wastewater treatment.|
|Key_word||algae;, biofilm, attachment material, multilayered culture, municipal wastewater, Stigeoclonium sp.|
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