Santillan, Ezequiel, Yasumaru, Fanny, Vethathirri, Ramanujam Srinivasan, Thi, Sara Swa, Hoon, Hui Yi, Chan, Diana Pek Sian, and Wuertz, Stefan (2024) Microbial community-based protein from soybean-processing wastewater as a sustainable alternative fish feed ingredient. Scientific Reports, 14. 2620.

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Abstract

As the global demand for food increases, aquaculture plays a key role as the fastest growing animal protein sector. However, existing aquafeeds contain protein ingredients that are not sustainable under current production systems. We evaluated the use of microbial community‑based single cell protein (SCP), produced from soybean processing wastewater, as a partial fishmeal protein substitute in juvenile Asian seabass (Lates calcarifer). A 24‑day feeding trial was conducted with a control fishmeal diet and a 50% fishmeal replacement with microbial community‑based SCP as an experimental group, in triplicate tanks containing 20 fish each. Both diets met the protein, essential amino acids (except for lysine), and fat requirements for juvenile Asian sea bass. The microbial composition of the SCP was dominated by the genera Acidipropionibacterium and Propioniciclava, which have potential as probiotics and producers of valuable metabolites. The growth performance in terms of percent weight gain, feed conversion ratio (FCR), specific growth rate (SGR), and survival were not significantly different between groups after 24 days. The experimental group had less variability in terms of weight gain and FCR than the control group. Overall, microbial community‑based protein produced from soybean processing wastewater has potential as a value‑added feed ingredient for sustainable aquaculture feeds.

Item ID:	82512
Item Type:	Article (Research - C1)
ISSN:	2045-2322
Keywords:	circular economy; SCP; single-cell protein; sustainable aquaculture
Copyright Information:	Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funders:	National Research Foundation (NRF)
Projects and Grants:	NRF-CRP21-2018-0006
Date Deposited:	02 Apr 2024 22:25
FoR Codes:	30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3005 Fisheries sciences > 300501 Aquaculture @ 50% 40 ENGINEERING > 4011 Environmental engineering > 401106 Waste management, reduction, reuse and recycling @ 50%
SEO Codes:	10 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 1002 Fisheries - aquaculture > 100202 Aquaculture fin fish (excl. tuna) @ 50% 11 COMMERCIAL SERVICES AND TOURISM > 1105 Water and waste services > 110501 Waste management services @ 50%
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