PMID- 34065504 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210615 IS - 2075-4450 (Print) IS - 2075-4450 (Electronic) IS - 2075-4450 (Linking) VI - 12 IP - 5 DP - 2021 May 20 TI - Effect of Processed Beverage By-Product-Based Diets on Biological Parameters, Conversion Efficiency and Body Composition of Hermetia illucens (L) (Diptera: Stratiomyidae). LID - 10.3390/insects12050475 [doi] LID - 475 AB - The effect of spent coffee grounds (SCG), brewer's spent grains (BSG) and their mixtures with the addition of brewer's yeast (BY) were tested in two rearing densities of the Black Soldier Fly, Hermetia illucens (L.). Different treatments were investigated on larval development, survival, yield, protein conversion (PrCR) and bioconversion rate (BCR), substrate mass reduction and body composition of the insect. BSF larvae were able to develop sufficiently in all diets, except on sole SCG. The addition of BY enhanced the performance properties of diets, especially in the case of SCG, where larvae underperformed. Substrate mass reduction, PrCR and BCR were affected only by feed and exhibited higher values on reference feed, followed by BSG and SCG+BSG enriched with BY. Density did not have a significant effect on various larval nutrients, except for fat, which was higher on larvae fed enriched feeds with BY and in the 300 larval density. The interaction between feed and density strongly affected the nitrogen and protein levels, larval yield and ash. Generally, diets which contained SCG exhibited high larval crude protein levels. Our results illustrate that low value beverage by-products can be successfully utilized as constituents of a successful BSF diet. FAU - Sideris, Vassilios AU - Sideris V AD - Laboratory of Agricultural Zoology and Entomology, Agricultural University of Athens, 118 55 Athens, Greece. FAU - Georgiadou, Maria AU - Georgiadou M AD - Laboratory of Nutritional Physiology & Feeding, Agricultural University of Athens, 118 55 Athens, Greece. FAU - Papadoulis, Georgios AU - Papadoulis G AD - Laboratory of Agricultural Zoology and Entomology, Agricultural University of Athens, 118 55 Athens, Greece. FAU - Mountzouris, Konstantinos AU - Mountzouris K AUID- ORCID: 0000-0002-7926-5604 AD - Laboratory of Nutritional Physiology & Feeding, Agricultural University of Athens, 118 55 Athens, Greece. FAU - Tsagkarakis, Antonios AU - Tsagkarakis A AUID- ORCID: 0000-0003-0964-4681 AD - Laboratory of Agricultural Zoology and Entomology, Agricultural University of Athens, 118 55 Athens, Greece. LA - eng PT - Journal Article DEP - 20210520 PL - Switzerland TA - Insects JT - Insects JID - 101574235 PMC - PMC8160662 OTO - NOTNLM OT - bioconversion rate OT - black soldier fly OT - brewer's spent grains OT - protein conversion OT - spent coffee grounds OT - substrate mass reduction OT - upcycling COIS- The authors declare no conflict of interest. EDAT- 2021/06/03 06:00 MHDA- 2021/06/03 06:01 PMCR- 2021/05/20 CRDT- 2021/06/02 01:13 PHST- 2021/04/08 00:00 [received] PHST- 2021/05/16 00:00 [revised] PHST- 2021/05/17 00:00 [accepted] PHST- 2021/06/02 01:13 [entrez] PHST- 2021/06/03 06:00 [pubmed] PHST- 2021/06/03 06:01 [medline] PHST- 2021/05/20 00:00 [pmc-release] AID - insects12050475 [pii] AID - insects-12-00475 [pii] AID - 10.3390/insects12050475 [doi] PST - epublish SO - Insects. 2021 May 20;12(5):475. doi: 10.3390/insects12050475.