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<p>In this work, we explored brewery spent grains (BSG), fermented in the solid-state (SSF), to produce insect feed within the concept of a circular economy. Our objectives were (i) to select efficient bacteria in the SSF of BSG; (ii) to evaluate the growth of <i>Galleria mellonella</i> and <i>Tenebrio molitor</i> larvae fed diets prepared with BSG and fermented BSG (BSGf); (iii) to estimate the proportion of proteins and carbohydrates acquired by the larvae; and (iv) to determine the nutritional composition of all the formulated diets. Compared with the sterile BSG control, <i>Chitinophaga dinghuensis</i> 27_LSS, <i>Cupriavidus taiwanensis</i> R189_LSS, <i>Pantoea ananatis</i> 186_LSS, <i>Bacillus cereus</i> 2_LSS, and <i>Cytobacillus kochii</i> 5_LSS, which were previously isolated from <i>Brachyurodesmus albus</i> (Diplopoda: Polydesmida), provided BSGf with higher values of flavonoid compounds, phenolics, proteins and reducing sugars (Dunnett's test, p &lt; 0.05). Considering the growth performance parameters evaluated, the rations with BSGf50 obtained satisfactory results for use in mass rearing of <i>G. mellonella</i>. For <i>T. molitor</i>, rations formulated with BSG100, BSG50 and BSGf50 showed sufficient results to replace traditional rations in mass rearing. The use of BSG in insect production promotes a circular economy and is an alternative strategy for waste management. Future studies should be carried out to test feasibility on a large scale.</p> Graphical Abstract <p></p>

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Bacteria Associated with Diplopods Used to Ferment Brewery Waste and Develop Insect Feed

  • 期刊论文

  • 发表日期：

    2025年4月28日

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  • Lorhaine Santos-Silva,
  • Ivani Souza Mello,
  • Rosemary Laís Galati,
  • Leandro Dênis Battirola,
  • Marcos Antônio Soares

摘要

In this work, we explored brewery spent grains (BSG), fermented in the solid-state (SSF), to produce insect feed within the concept of a circular economy. Our objectives were (i) to select efficient bacteria in the SSF of BSG; (ii) to evaluate the growth of Galleria mellonella and Tenebrio molitor larvae fed diets prepared with BSG and fermented BSG (BSGf); (iii) to estimate the proportion of proteins and carbohydrates acquired by the larvae; and (iv) to determine the nutritional composition of all the formulated diets. Compared with the sterile BSG control, Chitinophaga dinghuensis 27_LSS, Cupriavidus taiwanensis R189_LSS, Pantoea ananatis 186_LSS, Bacillus cereus 2_LSS, and Cytobacillus kochii 5_LSS, which were previously isolated from Brachyurodesmus albus (Diplopoda: Polydesmida), provided BSGf with higher values of flavonoid compounds, phenolics, proteins and reducing sugars (Dunnett's test, p < 0.05). Considering the growth performance parameters evaluated, the rations with BSGf50 obtained satisfactory results for use in mass rearing of G. mellonella. For T. molitor, rations formulated with BSG100, BSG50 and BSGf50 showed sufficient results to replace traditional rations in mass rearing. The use of BSG in insect production promotes a circular economy and is an alternative strategy for waste management. Future studies should be carried out to test feasibility on a large scale.

Graphical Abstract