A1 Journal article (refereed), original research

A synergic approach for nutrient recovery and biodiesel production by the cultivation of microalga species in the fertilizer plant wastewater


Open Access publication

Publication Details
Authors: Ambat Indu, Bec Sabina, Peltomaa Elina, Srivastava Varsha, Ojala Anne, Sillanpää Mika
Publisher: Nature Publishing Group: Open Access Journals - Option C / Nature Publishing Group
Publication year: 2019
Language: English
Related Journal or Series Information: Scientific Reports
Journal acronym: SciRep
Volume number: 9
ISSN: 2045-2322
JUFO-Level of this publication: 1
Open Access: Open Access publication

Abstract

The combination of wastewater treatment and biodiesel production using algal cultivation was studied in the present work. The two main goals of the work were achieved by the cultivation of freshwater microalgae such as Chlamydomonas sp., Scenedesmus ecornis, and Scenedesmus communis in two different dilutions of fertilizer plant wastewater (FWWD1 and FWWD2) collected from Yara Suomi Oy, Finland. The growth pattern of different algal species in FWWD1 and FWWD2 was observed. The effect of pH on biomass concentration, lipid content, biomass productivity, and lipid productivity by all three algal species in FWWD1 and FWWD2 were monitored. The maximum biomass concentration and productivity were observed in FWWD1 at pH7.5 for Chlamydomonas sp. and at pH 8.5 for S. ecornis and S. communis. The maximum lipid content was detected in Chlamydomonas sp at pH5.5, followed by S. ecornis and then S. communis at pH 7.5 in FWWD2 obtained after co-solvent extraction method. The most significant removal percentage of COD by all algal species were observed in FWWD1, whereas the highest removal percentage of TN and TP were detected in FWWD2, respectively. The fatty acid methyl ester (FAME) characterization of each algal species in FWWD1 and FWWD2 at their optimum pH was investigated to determine the quality of obtained biodiesel.


Last updated on 2020-20-03 at 10:03