Effect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content

Sustainable treatment of fecal matter is a long-standing challenge in sanitation, particularly in developing countries. Although recent developments have seen the evolution of innovative onsite sanitation technologies, the treatment of fecal waste collected still remains a daunting task. This study...

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Autores principales:	Rosemary M. Matheka, James M. Raude, Sylvia I. Murunga, Joy N. Riungu, Simon M. Wandera
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	circular economy co-digestion kitchen waste sanitation Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/c912ac857a0c490ab121ed9b8702d231
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spelling	oai:doaj.org-article:c912ac857a0c490ab121ed9b8702d2312021-11-05T19:40:28ZEffect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content2043-90832408-936210.2166/washdev.2021.077https://doaj.org/article/c912ac857a0c490ab121ed9b8702d2312021-09-01T00:00:00Zhttp://washdev.iwaponline.com/content/11/5/746https://doaj.org/toc/2043-9083https://doaj.org/toc/2408-9362Sustainable treatment of fecal matter is a long-standing challenge in sanitation, particularly in developing countries. Although recent developments have seen the evolution of innovative onsite sanitation technologies, the treatment of fecal waste collected still remains a daunting task. This study evaluated the effect of formulated feedstock: fecal matter from urine-diverting dry toilets and kitchen waste (1:0, 1:1, 2:1, 4:1, and 0:1) on waste weight reduction, Hermetia illucens’ larval weight gain, and crude protein content during co-digestion. Samples were collected after every 2 days for larval weight determination and protein content analysis using the Kjeldahl method of nitrogen determination. The waste reduction index (WRI) was determined after 50% pupation. The larvae grew on all substrates yielding 32.97–38.6% dry matter (DM) protein content and larval weight ranging from 1.12 to 1.70 g per five larvae. Results indicate that a 1:1 co-digestion ratio resulted in a high WRI (3.61), DM crude protein content (38.6%), and larval weight (1.70 g per five larvae). This study used the circular economy-based approach which provides a win–win situation to sanitation provision and environmental management while realizing products with potential for livelihood improvement. HIGHLIGHTS A system for simultaneous co-digestion of the urine-diverting dry toilet fecal matter and kitchen waste for animal feed protein ingredients was investigated.; Hermetia illucens’ larvae developed in all rearing substrates provided despite the substrates' elemental composition.; Co-digestion of fecal matter increased process performance of H. illucens’ larvae.; Co-digestion significantly increased larval protein content and weight.;Rosemary M. MathekaJames M. RaudeSylvia I. MurungaJoy N. RiunguSimon M. WanderaIWA Publishingarticlecircular economyco-digestionkitchen wastesanitationEnvironmental technology. Sanitary engineeringTD1-1066ENJournal of Water, Sanitation and Hygiene for Development, Vol 11, Iss 5, Pp 746-757 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	circular economy co-digestion kitchen waste sanitation Environmental technology. Sanitary engineering TD1-1066
spellingShingle	circular economy co-digestion kitchen waste sanitation Environmental technology. Sanitary engineering TD1-1066 Rosemary M. Matheka James M. Raude Sylvia I. Murunga Joy N. Riungu Simon M. Wandera Effect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content
description	Sustainable treatment of fecal matter is a long-standing challenge in sanitation, particularly in developing countries. Although recent developments have seen the evolution of innovative onsite sanitation technologies, the treatment of fecal waste collected still remains a daunting task. This study evaluated the effect of formulated feedstock: fecal matter from urine-diverting dry toilets and kitchen waste (1:0, 1:1, 2:1, 4:1, and 0:1) on waste weight reduction, Hermetia illucens’ larval weight gain, and crude protein content during co-digestion. Samples were collected after every 2 days for larval weight determination and protein content analysis using the Kjeldahl method of nitrogen determination. The waste reduction index (WRI) was determined after 50% pupation. The larvae grew on all substrates yielding 32.97–38.6% dry matter (DM) protein content and larval weight ranging from 1.12 to 1.70 g per five larvae. Results indicate that a 1:1 co-digestion ratio resulted in a high WRI (3.61), DM crude protein content (38.6%), and larval weight (1.70 g per five larvae). This study used the circular economy-based approach which provides a win–win situation to sanitation provision and environmental management while realizing products with potential for livelihood improvement. HIGHLIGHTS A system for simultaneous co-digestion of the urine-diverting dry toilet fecal matter and kitchen waste for animal feed protein ingredients was investigated.; Hermetia illucens’ larvae developed in all rearing substrates provided despite the substrates' elemental composition.; Co-digestion of fecal matter increased process performance of H. illucens’ larvae.; Co-digestion significantly increased larval protein content and weight.;
format	article
author	Rosemary M. Matheka James M. Raude Sylvia I. Murunga Joy N. Riungu Simon M. Wandera
author_facet	Rosemary M. Matheka James M. Raude Sylvia I. Murunga Joy N. Riungu Simon M. Wandera
author_sort	Rosemary M. Matheka
title	Effect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content
title_short	Effect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content
title_full	Effect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content
title_fullStr	Effect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content
title_full_unstemmed	Effect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content
title_sort	effect of fecal matter co-digestion with kitchen waste on hermetia illucens’ larval weight and protein content
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/c912ac857a0c490ab121ed9b8702d231
work_keys_str_mv	AT rosemarymmatheka effectoffecalmattercodigestionwithkitchenwasteonhermetiaillucenslarvalweightandproteincontent AT jamesmraude effectoffecalmattercodigestionwithkitchenwasteonhermetiaillucenslarvalweightandproteincontent AT sylviaimurunga effectoffecalmattercodigestionwithkitchenwasteonhermetiaillucenslarvalweightandproteincontent AT joynriungu effectoffecalmattercodigestionwithkitchenwasteonhermetiaillucenslarvalweightandproteincontent AT simonmwandera effectoffecalmattercodigestionwithkitchenwasteonhermetiaillucenslarvalweightandproteincontent
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Effect of fecal matter co-digestion with kitchen waste on Hermetia illucens’ larval weight and protein content

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