Prospects for BSFL conversion of grain wastes into pig feedstuffs

Abstract

Circular economy offers innovative opportunities to convert agricultural waste into valuable products and feedstocks. We established a high level of bioconversion of nutrients from grain wastes into BSFL biomass (FCR 2.56; per DM). The dried samples were found to have high crude protein (35.1%) and crude fat (40.8%) contents, suggesting the use of BSFL biomass as a feedstock for pigs. The inclusion of a high protein dietary component (CP 58.6%, lysine 1.30%) prepared from dried BSFL stimulated feed intake of pigs by 8.93% (p<0.05). There was a high degree of correlation between ADG-ADFI (r=0.83, p<0.001) as well as FCR-ADFI (r=0.74, p<0.001). The result of fattening pigs using BSFL meal is effective as the final ADG, carcass pair weight, slaughter yield were higher than the control (p<0.05). Thus, the use of grain wastes in the BSFL rearing technology creates prerequisites for further development of circular economy of waste processing with the help of insect technology and increases the sustainability of the feed base in pig breeding. In the long term, this approach significantly reduces the costs of production of final products, reduces waste and its negative impact on the environment.