Cited by 18Algal biology and biofuel productionAnaerobic Digestion and Biogas ProductionAquatic Ecosystems and Phytoplankton Dynamics

Mixotrophic microalgal-biofilm reactor augmenting biomass and biofuel productivity

Rana, Mohit Singh, Prajapati, Sanjeev Kumar·2022·Bioresource Technology

Abstract

The present work aimed to evaluate the mixotrophic growth of Chlorella pyrenoidosa in a microalgal-biofilm reactor (MBR) using waste glycerol as an organic carbon source. The biomass productivity of C. pyrenoidosa (10.14 g m-2 d-1) under the mixotrophic mode was remarkably higher than that observed during the phototrophic mode (4.16 g m-2 d-1), under similar incubation conditions. The hydraulic retention time (HRT) of 6 d was found optimal for the higher productivity of microalgae in the MBR. Notably, based on biofuel quality, mixotrophically grown microalgal biomass was noted to have better suitability for biomethane production compared to biodiesel. Besides, up to 98.09, 75.74, and 55.86% removal of phosphate, nitrate, and COD, respectively, was recorded within 6 d under mixotrophic growth. Overall, the present findings magnificently demonstrate the efficient recycling of waste glycerol for higher biomass production coupled with phycoremediation using mixotrophic MBR.

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Crossref · 10.1016/j.biortech.2022.127306

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Authors
Rana, M. S., & Prajapati, S. K.
Affiliations
Indian Institute of Technology Roorkee (IN)
Corresponding author
Prajapati, Sanjeev Kumar
Venue
Bioresource Technology
Publisher
Elsevier BV
Published
2022-07
Volume
356
Pages
127306
ISSN
0960-8524 (ISSN-L)
OpenAlex
W4280566357
Cited by
18
References
48
Citations by year
2026: 2 · 2025: 3 · 2024: 8 · 2023: 3 · 2022: 2
FWCI
0.72
Type
journal article
Language
en
Open access
closed
Locations
  • Bioresource Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Indian Institute of Technology Roorkee
  • Ministry of Education, India (PMRF-192002-1354)
  • Uttarakhand State Council for Science and Technology (UCS&T/R&D-10/20-21/19072/02)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
  • Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
Keywords
mixotrophic cultivation, Chlorella pyrenoidosa, waste glycerol, microalgae productivity, hydraulic retention time, biomethane, biodiesel, phycoremediation, nitrogen removal, phosphate removal, COD removal, biofuel production
MeSH terms
Chlorella, Glycerol, Biofilms, Biomass, Biofuels, Microalgae

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