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Characterization of a microalga Chlorella sp. well adapted to highly concentrated municipal wastewater for nutrient removal and biodiesel production
Abstract
The feasibility of growing Chlorella sp. in the centrate, a highly concentrated municipal wastewater stream generated from activated sludge thickening process, for simultaneous wastewater treatment and energy production was tested. The characteristics of algal growth, biodiesel production, wastewater nutrient removal and the viability of scale-up and the stability of continuous operation were examined. Two culture media, namely autoclaved centrate (AC) and raw centrate (RC) were used for comparison. The results showed that by the end of a 14-day batch culture, algae could remove ammonia, total nitrogen, total phosphorus, and chemical oxygen demand (COD) by 93.9%, 89.1%, 80.9%, and 90.8%, respectively from raw centrate, and the fatty acid methyl ester (FAME) content was 11.04% of dry biomass providing a biodiesel yield of 0.12 g-biodiesel/L-algae culture solution. The system could be successfully scaled up, and continuously operated at 50% daily harvesting rate, providing a net biomass productivity of 0.92 g-algae/(L day).
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“In this sense, the growth rate and biomass yield of Chlorella sp.cultivated in autoclaved and raw centrate were comparable to those obtained from standard cultivation media [90].”
From Challenges and Opportunities to Increase Economic Feasibility and Sustainability of Mixotrophic Cultivation of Green Microalgae of the Genus Chlorella (2022) · cites this paper as [90]
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Metadata
- Authors
- Li, Y., Chen, Y.-F., Chen, P., Min, M., Zhou, W., Martinez, B., Zhu, J., & Ruan, R.
- Affiliations
- University of Minnesota (US)
- Corresponding author
- Ruan, Roger
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2011-04
- Volume
- 102
- Issue
- 8
- Pages
- 5138-5144
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2030188168
- Cited by
- 724
- References
- 38
- Citations by year
- 2026: 16 · 2025: 26 · 2024: 28 · 2023: 36 · 2022: 56 · 2021: 57 · 2020: 70 · 2019: 79 · 2018: 67 · 2017: 62 · 2016: 68 · 2015: 38 · 2014: 57 · 2013: 32 · 2012: 23
- FWCI
- 15.83
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- University of Minnesota Initiative for Renewable Energy (IREE)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
- Physical Sciences › Environmental Science › Waste Management and Disposal › Wastewater Treatment and Reuse
- Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
- Keywords
- Chlorella, microalgae, municipal wastewater, nutrient removal, biodiesel production, fatty acid methyl esters, algal growth, scale-up, continuous operation, biomass productivity, nitrogen removal, phosphorus removal, COD removal
- MeSH terms
- Adaptation, Physiological, Chlorella, Culture Media, Biofuels, Microalgae
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