Potential of culturing microalgae Chlorella vulgaris and Nannochloropsis oculata with aquaculture wastewater for simultaneous aquafeed production and wastewater remediation

被引：0

作者：

Wong Ryan Lieng Song ^{[1
]}

Yeap Swee Keong ^{[1
]}

Fatimah Md. Yusoff ^{[2
]}

Tan Jian Ping ^{[3
]}

Norazira Abdu Rahman ^{[1
]}

机构：

[1] Xiamen University Malaysia,China

[2] International Institute of Aquaculture and Aquatic Sciences,ASEAN College of Marine Sciences

[3] Universiti Putra Malaysia,School of Energy and Chemical Engineering

[4] Xiamen University Malaysia,undefined

来源：

Blue Biotechnology | / 1卷 / 1期

关键词：

Microalgae; Aquaculture; Wastewater; Aquafeed; Protein; Carbohydrate;

D O I：

10.1186/s44315-024-00020-8

中图分类号：

学科分类号：

摘要：

Aquaculture expansion has resulted in nutrient pollution in aquatic ecosystems, primarily due to nitrogen-rich effluents, leading to eutrophication and degraded water quality. Although conventional wastewater treatment methods are effective, they are often costly and environmentally risky. Microalgae offer a promising alternative, enabling both wastewater remediation and the production of nutrient-rich biomass. However, most research has mainly focused on nutrient removal efficiencies, with relatively little attention given to the quality of the microalgal biomass and its suitability for simultaneous aquafeed production. This study evaluates the growth, nutritional content, and nutrient removal efficiencies of Chlorella vulgaris (C. vulgaris) and Nannochloropsis oculata (N. oculata) in synthetic aquaculture wastewater (AW). The findings reveal that both species showed significant growth in AW and F/2 media, with N. oculata reaching the highest cell density (17.6 × 10⁶ cells/mL) in AW. After seven days, C. vulgaris removed 83.7 ± 0.42% of nutrients in AW and 78.0 ± 4.35% in F/2, while N. oculata achieved 71.3 ± 1.50% and 72.3 ± 10.0%, respectively. Biomass from both species was also rich in protein (35.9–57.4%) and carbohydrates (12.7–40.9%). Particularly, N. oculata produced 46% dw protein and 40.9% dw carbohydrates in aquaculture wastewater, with protein levels higher than most previously reported values in such conditions. Additionally, with over 71% nutrient removal in only seven days, a longer culture duration and higher initial biomass inoculum could further enhance the efficiency. These findings highlight the potential of N. oculata and C. vulgaris for sustainable aquaculture, effectively treating aquaculture wastewater and producing high-quality aquafeed biomass, thereby supporting environmentally friendly and cost-effective practices.

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