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Cultivation of Brackish Water Microalgae for Pig Manure Liquid Digestate Recycling

Author

Listed:
  • Yung-Cheng Chang

    (Department of Aquaculture, National Taiwan Ocean University, Keelung 20224, Taiwan
    Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan)

  • Yen-Ju Pan

    (Department of Aquaculture, National Taiwan Ocean University, Keelung 20224, Taiwan
    Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan)

  • Tzu-Hsuan Huang

    (Livestock Management Division, Livestock Research Institute, Ministry of Agriculture, Tainan 71246, Taiwan)

  • Ting-Hsun Hsiao

    (Livestock Management Division, Livestock Research Institute, Ministry of Agriculture, Tainan 71246, Taiwan)

  • Liang-Yu Wei

    (Department of Environmental Biology and Fisheries Science, National Taiwan Ocean University, Keelung 20224, Taiwan)

  • Te-Hua Hsu

    (Department of Aquaculture, National Taiwan Ocean University, Keelung 20224, Taiwan
    Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan)

Abstract

Sustainability and recycling of agricultural and animal husbandry waste are important. Pig manure contains relatively high concentrations of organic matter, such as nitrate-nitrogen, ammonia nitrogen, and phosphate, and a direct discharge can cause environmental pollution. This study successfully culturing four brackish water microalgae, including Tetraselmis chuii , Isochrysis galbana , Chlorella vulgaris , and Proteomonas sulcata, by using a diluted digestate solution of pig manure (NH 3 concentration is lower than 10 mg/L). These microalgae can reach their highest cell concentration within 3–7 days of cultivation. The small microalgae, C. vulgaris and I. galbana , reached a cell density of 2.5 × 10 7 and 1.5 × 10 7 , respectively, whereas lower cell densities were documented for large microalgae T. chuii (1.4 × 10 6 ) and P. sulcata (1.6 × 10 6 ). Our findings highlight the feasibility of sustainable treatment of animal manure using brackish water microalgae. These results provide opportunities to reduce freshwater usage and environmental pollutions, and support microalgae production for further aquaculture application.

Suggested Citation

  • Yung-Cheng Chang & Yen-Ju Pan & Tzu-Hsuan Huang & Ting-Hsun Hsiao & Liang-Yu Wei & Te-Hua Hsu, 2023. "Cultivation of Brackish Water Microalgae for Pig Manure Liquid Digestate Recycling," Sustainability, MDPI, vol. 15(23), pages 1-14, November.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:23:p:16278-:d:1287155
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    References listed on IDEAS

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    1. Khoshnevisan, Benyamin & Duan, Na & Tsapekos, Panagiotis & Awasthi, Mukesh Kumar & Liu, Zhidan & Mohammadi, Ali & Angelidaki, Irini & Tsang, Daniel CW. & Zhang, Zengqiang & Pan, Junting & Ma, Lin & Ag, 2021. "A critical review on livestock manure biorefinery technologies: Sustainability, challenges, and future perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 135(C).
    2. Zou, Xiaotong & Xu, Kaiwei & Chang, Wenjuan & Qu, Yanhui & Li, Yanpeng, 2021. "A novel microalgal biofilm reactor using walnut shell as substratum for microalgae biofilm cultivation and lipid accumulation," Renewable Energy, Elsevier, vol. 175(C), pages 676-685.
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