Use of faba bean (Vicia faba L.) hulls as substrate for Pleurotus ostreatus – Potential for combined mushroom and feed production

A circular concept involving use of faba bean hulls for production oyster mushrooms (Pleurotus ostreatus (Jacq.) P. Kumm.) and the post-harvest residues feed purposes was evaluated. Faba are a waste remaining after beans dehulled to decrease content anti-nutritional factors increase food value beans. proved very suitable as substrate mushrooms, with biological efficiency 109 ± 28%. The fruiting bodies produced were comparable commercially sold in terms morphology, protein content, quality, chemical composition. After mushroom harvest, 48.4 0.6% initial dry weight (dwt) remained showed significant changes proximate composition, an concentration from 207.9 8.6 346.6 16.5 g kg−1 dwt 14 16 amino acids analyzed, including methionine. Concentrations compounds vicine convicine below detection limit while their 5.7 0.1 1.4 0.04 dwt, respectively. Tannin reduced by approximately 50%, final level 9.0 1.6 dwt. Comparison spent commonly used feedstuff pigs indicated potential be valuable source pig diets. This study demonstrates achieving complete agro has implications development systems well suited biobased society.