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

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http://hdl.handle.net/10138/311070

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Ambat , I , Bec , S , Peltomaa , E , Srivastava , V , Ojala , A & Sillanpaa , M 2019 , ' A synergic approach for nutrient recovery and biodiesel production by the cultivation of microalga species in the fertilizer plant wastewater ' , Scientific Reports , vol. 9 , 19073 . https://doi.org/10.1038/s41598-019-55748-w

Title: A synergic approach for nutrient recovery and biodiesel production by the cultivation of microalga species in the fertilizer plant wastewater
Author: Ambat, Indu; Bec, Sabina; Peltomaa, Elina; Srivastava, Varsha; Ojala, Anne; Sillanpaa, Mika
Contributor: University of Helsinki, Helsinki Institute of Sustainability Science (HELSUS)
University of Helsinki, Ecosystems and Environment Research Programme
Date: 2019-12-13
Language: eng
Number of pages: 9
Belongs to series: Scientific Reports
ISSN: 2045-2322
URI: http://hdl.handle.net/10138/311070
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 0y, 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.
Subject: ALGAL BIOMASS
CHLORELLA-PYRENOIDOSA
GROWTH
CHLAMYDOMONAS
REMOVAL
TRANSESTERIFICATION
PHOTOBIOREACTOR
AQUACULTURE
FEEDSTOCKS
EXTRACTION
1172 Environmental sciences
1183 Plant biology, microbiology, virology
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