Biochar and gypsum amendment of agro- industrial waste for enhanced black soldier fly larval biomass and quality frass fertilizer

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dc.contributor.authorBeesigamukama, Dennis
dc.contributor.authorMochoge, Benson
dc.contributor.authorKorir, Nicholas K.
dc.contributor.authorKomi, K
dc.contributor.authorFiaboe, M.
dc.contributor.authorNakimbugwe, Dorothy
dc.contributor.authorKhamis, Fathiya M.
dc.contributor.authorDubois, Thomas
dc.contributor.authorSubramanian, Sevgan
dc.contributor.authorWangu, Musyoka M.
dc.contributor.authorEkesi, Sunday
dc.contributor.authorTanga, Chrysantus M.
dc.date.accessioned2020-09-21T08:33:38Z
dc.date.available2020-09-21T08:33:38Z
dc.date.issued2020
dc.descriptionA research article published in PloseOneen_US
dc.description.abstractBlack soldier fly (BSF) (Hermetia illucens L.) is one of the most efficient bio-waste recyclers. Although, waste substrate amendments with biochar or gypsum during composting process are known to enhance nutrient retention, their impact on agro-industrial waste have not been documented. Hence, this study focuses on a comparative effect of agro-industrial waste amended with biochar and gypsum on BSF larval performance, waste degradation, and nitrogen (N) and potassium retention in frass fertilizer. Brewery spent grain was amended with biochar or gypsum at 0, 5, 10, 15 and 20% to determine the most effective rates of inclusion. Amending feedstock with 20% biochar significantly increased wet (89%) and dried (86%) larval yields than the control (unamended feedstock). However, amendment with 15% gypsum caused decrease in wet (34%) and dried (30%) larval yields but conserved the highest amount of N in frass. Furthermore, the inclusion of 20% biochar recorded the highest frass fertilizer yield and gave a 21% increase in N retention in frass fertilizer, while biomass conversion rate was increased by 195% compared to the control. Feedstock amendment with 5% biochar had the highest waste degradation efficiency. Potassium content in frass fertilizer was also significantly enhanced with biochar amendment. At maturity, frass compost with more than 10% inclusion rate of biochar had the highest cabbage seed germination indices (>100%). The findings of this study revealed that initial composting of biochar amended feedstocks using BSF larvae can significantly shorten compost maturity time to 5 weeks with enhanced nutrient recycling compared to the conventional composting methods.en_US
dc.description.sponsorshipThis research was financially supported by the Canadian International Development Research Centre (IDRC) and the Australian Centre for International Agricultural Research (ACIAR) (INSFEED - Phase 2: Cultivate Grant No: 108866- 001) and the Netherlands Organization for Scientific Research, WOTRO Science for Global Development (NWO-WOTRO) (ILIPA–W
dc.identifier.citationBeesigamukama D, Mochoge B, Korir NK, Fiaboe KKM, Nakimbugwe D, Khamis FM, et al. (2020) Biochar and gypsum amendment of agroindustrial waste for enhanced black soldier fly larval biomass and quality frass fertilizer. PLoS ONE 15 (8): e0238154. https://doi.org/10.1371/journal. pone.0238154en_US
dc.identifier.urihttps://doi.org/10.1371/journal. pone.0238154
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/20401
dc.language.isoenen_US
dc.publisherPloseOneen_US
dc.subjectBiocharen_US
dc.subjectagroindustrial wasteen_US
dc.subjectfrass fertilizeren_US
dc.titleBiochar and gypsum amendment of agro- industrial waste for enhanced black soldier fly larval biomass and quality frass fertilizeren_US
dc.typeArticleen_US
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