Applications of Microalgae and Macroalgae in Water Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: 10 September 2024 | Viewed by 2040

Special Issue Editors


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Guest Editor
Department of Environmental Science and Engineering, Fudan university, Shanghai, China
Interests: microalgae; biomass and bioenergy; wastewater treatment; bioaerosol; microbiology
Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany
Interests: algae blooms; water resources management; eutrophication processes; water quality modeling; physical limnology
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Special Issue Information

Dear Colleagues,

Water contaminants threaten the environment and human society. Wastewater treatment and reuse are one of the solutions proposed for water-related environmental issues. Additionally, with “carbon neutralization” being proposed, new issues and challenges are evident for water treatment and reuse technologies. Macroalgae and microalgae-based technologies have been considered promising, coupling wastewater treatment and biomass production. Algae can consume undesired contaminants, e.g., carbon, nitrogen, and phosphorus, in water through their metabolism from effluents, producing carbon-neutralized biomass, e.g., carbohydrates, lipid, and protein. They are also adaptive to various types of wastewater. In this context, this Special Issue will focus on macroalgae and microalgae-based wastewater treatment technologies while highlighting the latest technology advancements. This topic welcomes high-quality research articles and state-of-the-art critical reviews.

Dr. Changliang Nie
Dr. Chenxi Mi
Guest Editors

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Keywords

  • microalgae
  • wastewater treatment
  • biomass

Published Papers (1 paper)

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Research

13 pages, 1527 KiB  
Article
Sustainable Lutein Production from Chlorella sorokiniana NIES-2168 by Using Aquaculture Wastewater with Two-Stage Cultivation Strategies
by Yaxin Yin and Xiaoling Miao
Water 2024, 16(1), 79; https://doi.org/10.3390/w16010079 - 24 Dec 2023
Viewed by 1279
Abstract
Unnecessary discharge of nutrient-rich aquaculture wastewater is a significant threat to the environment, exacerbating massive resource wasting worldwide. Microalgae-based circular economy strategies utilize atmospheric CO2 and aquaculture wastewater nutrients and convert them into valuable compounds. Lutein, a natural pigment, is a nutritional [...] Read more.
Unnecessary discharge of nutrient-rich aquaculture wastewater is a significant threat to the environment, exacerbating massive resource wasting worldwide. Microalgae-based circular economy strategies utilize atmospheric CO2 and aquaculture wastewater nutrients and convert them into valuable compounds. Lutein, a natural pigment, is a nutritional supplement for eye protection, anti-cancer and anti-inflammatory effects, and other health benefits. It is widely utilized in the food and pharmaceutical industries. The primary purpose of this study is to reuse aquaculture wastewater to grow microalgae and optimize conditions to achieve a high yield of lutein as well as the removal of nutrients from wastewater. When cultured in 1.0× BG11 nutrient-added aquaculture wastewater and aerated using 2% CO2, the biomass concentration and lutein content of Chlorella sorokiniana NIES-2168 increased to 1.78 g L−1 and 7.43 mg g−1, respectively. A two-stage culture strategy further increased the lutein content and yield of microalgae. The highest lutein content of 13.95 mg g−1 and lutein productivity of 3.63 mg L−1 d−1 in the second stage aligned with other phototrophic microalgae currently used for lutein production. C. sorokiniana NIES-2168 also showed exceptional nitrogen and phosphorus removal efficiency, with nitrate and phosphate removal rates reaching 96.07% and 96.75% during the two-stage culture process. Full article
(This article belongs to the Special Issue Applications of Microalgae and Macroalgae in Water Treatment)
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