Effective harvesting of the microalgae Chlorella protothecoides via bioflocculation with cationic starch.

Carlos Octavio Letelier Gordo, Susan Løvstad Holdt, Davide De Francisci, Dimitar Borisov Karakashev, Irini Angelidaki

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In the present work, the flocculation efficiency of cationic starch (Greenfloc 120) was tested on the fresh water microalga Chlorella protothecoides under different conditions (pH and flocculant concentrations). Different concentrations of Greenfloc 120 (0, 2.5, 5, 10, 20, 40mgL-1) were screened against different algal densities (0.44, 0.56 and 0.77gL-1). Once the optimal flocculation concentration had been established (40mgL(-1) for all different biomasses densities) a more detailed analysis was performed in order to investigate if different pH (4.0, 7.7, and 10.0) could increase the flocculation efficiency of cationic starch. Highest flocculation efficiency without addition of Greenfloc 120 was obtained at pH 10, while in the presence of flocculant, the efficiency increased for all the tested pH values, with a maximum of 98% for pH 7.7 and 10. Cationic starch confirmed to be as an easy to use, efficient and cost-effective flocculant for harvesting of microalgae.
Original languageEnglish
JournalBioresource Technology
Volume167
Pages (from-to)214-218
ISSN0960-8524
DOIs
Publication statusPublished - 2014

Keywords

  • Chlorella protothecoides
  • Flocculation
  • Cationic starch

Cite this

@article{eff9c01a5ff74c6b8d70a54e3206afec,
title = "Effective harvesting of the microalgae Chlorella protothecoides via bioflocculation with cationic starch.",
abstract = "In the present work, the flocculation efficiency of cationic starch (Greenfloc 120) was tested on the fresh water microalga Chlorella protothecoides under different conditions (pH and flocculant concentrations). Different concentrations of Greenfloc 120 (0, 2.5, 5, 10, 20, 40mgL-1) were screened against different algal densities (0.44, 0.56 and 0.77gL-1). Once the optimal flocculation concentration had been established (40mgL(-1) for all different biomasses densities) a more detailed analysis was performed in order to investigate if different pH (4.0, 7.7, and 10.0) could increase the flocculation efficiency of cationic starch. Highest flocculation efficiency without addition of Greenfloc 120 was obtained at pH 10, while in the presence of flocculant, the efficiency increased for all the tested pH values, with a maximum of 98{\%} for pH 7.7 and 10. Cationic starch confirmed to be as an easy to use, efficient and cost-effective flocculant for harvesting of microalgae.",
keywords = "Chlorella protothecoides, Flocculation, Cationic starch",
author = "{Letelier Gordo}, {Carlos Octavio} and Holdt, {Susan L{\o}vstad} and {De Francisci}, Davide and Karakashev, {Dimitar Borisov} and Irini Angelidaki",
year = "2014",
doi = "10.1016/j.biortech.2014.06.014",
language = "English",
volume = "167",
pages = "214--218",
journal = "Bioresource Technology",
issn = "0960-8524",
publisher = "Elsevier",

}

Effective harvesting of the microalgae Chlorella protothecoides via bioflocculation with cationic starch. / Letelier Gordo, Carlos Octavio; Holdt, Susan Løvstad; De Francisci, Davide; Karakashev, Dimitar Borisov; Angelidaki, Irini.

In: Bioresource Technology, Vol. 167, 2014, p. 214-218.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effective harvesting of the microalgae Chlorella protothecoides via bioflocculation with cationic starch.

AU - Letelier Gordo, Carlos Octavio

AU - Holdt, Susan Løvstad

AU - De Francisci, Davide

AU - Karakashev, Dimitar Borisov

AU - Angelidaki, Irini

PY - 2014

Y1 - 2014

N2 - In the present work, the flocculation efficiency of cationic starch (Greenfloc 120) was tested on the fresh water microalga Chlorella protothecoides under different conditions (pH and flocculant concentrations). Different concentrations of Greenfloc 120 (0, 2.5, 5, 10, 20, 40mgL-1) were screened against different algal densities (0.44, 0.56 and 0.77gL-1). Once the optimal flocculation concentration had been established (40mgL(-1) for all different biomasses densities) a more detailed analysis was performed in order to investigate if different pH (4.0, 7.7, and 10.0) could increase the flocculation efficiency of cationic starch. Highest flocculation efficiency without addition of Greenfloc 120 was obtained at pH 10, while in the presence of flocculant, the efficiency increased for all the tested pH values, with a maximum of 98% for pH 7.7 and 10. Cationic starch confirmed to be as an easy to use, efficient and cost-effective flocculant for harvesting of microalgae.

AB - In the present work, the flocculation efficiency of cationic starch (Greenfloc 120) was tested on the fresh water microalga Chlorella protothecoides under different conditions (pH and flocculant concentrations). Different concentrations of Greenfloc 120 (0, 2.5, 5, 10, 20, 40mgL-1) were screened against different algal densities (0.44, 0.56 and 0.77gL-1). Once the optimal flocculation concentration had been established (40mgL(-1) for all different biomasses densities) a more detailed analysis was performed in order to investigate if different pH (4.0, 7.7, and 10.0) could increase the flocculation efficiency of cationic starch. Highest flocculation efficiency without addition of Greenfloc 120 was obtained at pH 10, while in the presence of flocculant, the efficiency increased for all the tested pH values, with a maximum of 98% for pH 7.7 and 10. Cationic starch confirmed to be as an easy to use, efficient and cost-effective flocculant for harvesting of microalgae.

KW - Chlorella protothecoides

KW - Flocculation

KW - Cationic starch

U2 - 10.1016/j.biortech.2014.06.014

DO - 10.1016/j.biortech.2014.06.014

M3 - Journal article

VL - 167

SP - 214

EP - 218

JO - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

ER -