BIOCONVERSION OF CEREAL BY-PRODUCTS THROUGH Pleurotus ostreatus MEDIATED SOLID-STATE FERMENTATION OF THREE AGRO BY-PRODUCTS

Afram, Dennis and Gyamfi, Emmanuella Ekua Tweneboah and Van-Ess, Jennifer and Williams, Nene and Attoh-Kotoku, Victoria and Aboagye, Agyemang Felix and Owusu, Kenneth Gyimah and Sasu, Prince and Adjei-Mensah, Benjamin and Donkoh, Armstrong (2026) BIOCONVERSION OF CEREAL BY-PRODUCTS THROUGH Pleurotus ostreatus MEDIATED SOLID-STATE FERMENTATION OF THREE AGRO BY-PRODUCTS. Online Journal of Animal and Feed Research. 98 - 108. ISSN 22287701

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Abstract

Solid-state fermentation (SSF) offers a promising approach to enhance the nutritional value of abundant but underutilized agro-industrial by-products in sub-Saharan Africa. The study investigated the effect of SSF using Pleurotus ostreatus on rice bran (RB), rice husk (RH) and maize cob (MC). The design used was a 3 � 3 factorial arrangement of treatments in a completely randomized design (CRD). The factors were three substrates (RB: rice bran, RH: rice husk, and MC: maize cob) and three fermentation periods (0, 30, 45 days). Unfermented and fermented samples were analysed for dry matter (DM), crude protein (CP), ether extract (EE), ash, crude fibre (CF), neutral detergent fibre (NDF), acid detergent fibre (ADF), and acid detergent lignin (ADL). In vitro gas production (3-96 h) was measured using rumen liquor. In vitro organic matter digestibility (IVOMD), metabolizable energy (ME), net energy (NE), short-chain fatty acids (SCFAs), and microbial protein (MP) were estimated using established models. Significant differences (P < 0.05) in CP and EE contents were observed among RB, RH, and MC within fermentation periods. The CP contents at days 30 and 45 were 9.44, 8.10 for RB, 3.07, 4.69 for RH, and 5.32, 12.19 for MC, respectively. Fibre fractions varied among substrates at each fermentation period, with NDF differing among RB, RH, and MC, and ADL showing significant differences among substrates at day 30. Potential gas production (b) rose in MC (52.7 ml) and RH (53.9 ml) after 45 days. The rate of gas production (c) ranged from 0.03-0.08 h^-1 at day 0 and 30, but after 45 days, RH reached 0.08 h^-1, while RB and MC slowed to 0.01 h^-1. IVOMD, ME, NE, SCFA and MP were all higher in fermented RH and MC, with peak improvements at day 30. The study results indicated that SSF for 30-45 days could improve the nutritional value of agro-industrial by-products. © The Author(s) 2026

Item Type:	Article
Keywords:	Chemical composition; In vitro gas production; Maize cob; Oyster mushroom; Rice bran; Rice husk; Solid-state fermentation
Subjects:	S Agriculture > SF Animal culture
Divisions:	Online Journal of Animal and Feed Research (OJAFR)
Page Range:	98 - 108
Journal or Publication Title:	Online Journal of Animal and Feed Research
Journal Index:	Scopus
Volume:	16
Number:	2
Publisher:	Scienceline Publications, Ltd
Identification Number:	https://doi.org/10.51227/ojafr.2026.12
ISSN:	22287701
Depositing User:	Dr. Saeid Chekani-Azar
URI:	https://eprints.science-line.com/id/eprint/1795

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