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

dc.contributor.authorBeesigamukama, D.
dc.contributor.authorMochoge, B.
dc.contributor.authorKorir, N.K.
dc.contributor.authorFiaboe, K.K.
dc.contributor.authorNakimbugwe, D.
dc.contributor.authorKhamis, F.M.
dc.contributor.authorDubois, T.
dc.contributor.authorSubramanian, S.
dc.contributor.authorWangu, M.M.
dc.contributor.authorEkesi, S.
dc.contributor.authorTanga, C.M.
dc.date.accessioned2021-02-15T11:28:43Z
dc.date.available2021-02-15T11:28:43Z
dc.date.issued2021
dc.identifier.citationBeesigamukama, D., Mochoge, B., Korir, N.K., Fiaboe, K.K., Nakimbugwe, D., Khamis, F.M., ... & Tanga, C.M. (2020). Biochar and gypsum amendment of agro-industrial waste for enhanced black soldier fly larval biomass and quality frass fertilizer. PloS One, 15(8), e0238154, 1-25.
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7039
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.
dc.description.sponsorshipCanadian International Development Research Centre
dc.description.sponsorshipAustralian Centre for International Agricultural Research
dc.description.sponsorshipNetherlands Organization for Scientific Research
dc.description.sponsorshipInternational Centre of Insect Physiology and Ecology
dc.description.sponsorshipUK Aid
dc.description.sponsorshipSwedish International Development Cooperation Agency
dc.description.sponsorshipSwiss Agency for Development and Cooperation
dc.description.sponsorshipFederal Ministry for Economic Cooperation and Development, Germany
dc.description.sponsorshipFederal Democratic Republic of Ethiopia
dc.description.sponsorshipKenyan Government
dc.format.extent1-25
dc.language.isoen
dc.subjectHermetia Illucens
dc.subjectComposting
dc.subjectNutrients
dc.subjectSoil Parent Material
dc.subjectWastes
dc.subjectFertilizers
dc.titleBiochar and gypsum amendment of agroindustrial waste for enhanced black soldier fly larval biomass and quality frass fertilizer
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Centre of Insect Physiology and Ecology
cg.contributor.affiliationKenyatta University
cg.contributor.affiliationBusitema University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationMakerere University
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryKenya
cg.coverage.hubCentral Africa Hub
cg.researchthemeNatural Resource Management
cg.identifier.bibtexciteidBEEDIGAMUKAMA:2021a
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectIntegrated Soil Fertility Management
cg.iitasubjectSoil Fertility
cg.iitasubjectSoil Health
cg.journalPLOS ONE
cg.notesOpen Access Journal; Published online: 27 Aug 2020
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1371/journal.pone.0238154
cg.iitaauthor.identifierKomi Fiaboe: 0000-0001-5113-2159
cg.futureupdate.requiredNo


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