Experimental evaluation of fresh human feces biogas and compost potential: Evidence for circular economy from waste streams in Ethiopia

Donacho, Dereje Oljira; Tucho, Gudina Terefe; Olani, Dessalegn Dadi; Kabtiyimer, Hailu Endale; Hailu, Abebe Beyene; Wolde, Aysha Desalegn

doi:10.1016/j.heliyon.2023.e22494

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…Conversion of human excrement through anaerobic digestion by the use of biogas digesters can satisfy the needs of locals such as lighting, cooking, and heating, in addition to solving sanitation problems associated with poor disposal of human excrement (Josue et al, 2023). Anaerobic digestion offers a simple and effective way of dealing with organic waste, including human waste (Donacho et al, 2023). Despite the potential energy of human excrement, it has been given less value and the benefits are undervalued.…”

Section: Introductionmentioning

confidence: 99%

Factors Influencing Management of Human Excrement through Biogas Technology in Mukuru Kwa Njenga Slums, Nairobi City County Kenya

Munyigi,

Mang’uriu

2024

East Afr. j. environ. nat. resour.

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One of the factors influencing the achievement of sustainable sanitation is the proper disposal of human excrement. The problem is most prevalent in informal settlements, where sewerage systems are rare. One of the approaches considered sustainable is the conversion of human excrement into renewable energy via biogas technology. The purpose of the study, which was guided by Roger's theory of innovation diffusion, was to investigate the key factors that influence human excrement management through biogas technology. Mukuru Kwa Njenga slums were chosen as a study area. A sample of 100 people was selected using systematic random sampling. Data were analysed using a social science statistics package. Multiple linear regression was used to determine demographic factors that influence technology adoption. The Chi-square test was used to examine the relationship between various variables. Tables and charts were used to present the data. The study revealed that gender (p=.001) and education level (p=.000) significantly influence the use of biogas technology in the management of human excrement. Technology failure ((χ2= 10.301, p=.036) and lack of technical skills ((χ2= 7.518, p=.128) have no significant effect on the technology adoption rate. Cultural beliefs (χ2= 23.665, P=.000) have a significant effect on the use of biogas produced from human excrement. The ability of technology to prevent overflowing of faecal matter during heavy rainfall (χ2= 23.937, P=.000) and the prevention of odour from sanitation facilities (χ2=17.983, p= .001) has encouraged many residents to use the technology. The study concludes that technical and socio-economic factors, as well as its relative advantage over other excrement disposal methods, influence its adoption rate

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Section: Introductionmentioning

confidence: 99%

Factors Influencing Management of Human Excrement through Biogas Technology in Mukuru Kwa Njenga Slums, Nairobi City County Kenya

Munyigi,

Mang’uriu

2024

East Afr. j. environ. nat. resour.

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Perception of urine diverting dry toilet and baobab cultivation in Adaklu District of Ghana

Horlu,

Egbadzor,

Afetorgbor

et al. 2024

Sustainable Environment

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Environmental and Economic Forecast of the Widespread Use of Anaerobic Digestion Techniques

Kiselev,

Magaril,

Giurea

2024

Recycling

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The concept of the circular economy represents the most relevant mainstream approach to reducing the negative environmental impact of waste. Anaerobic digestion has proved to be one of the leading and widely adopted techniques for sewage sludge treatment under the principles of the circular economy. The purpose of this study is to forecast environmental and economic indicators through modeling the extensive utilization of biogas technologies with a case study of an administrative territorial unit. The proposed methodological framework involves the use of averaged specific indicators and is based on the relationship between inhabitants, waste generation rates, biogas yield, greenhouse gas emission mitigation and biogas energy potential. The widespread use of anaerobic digestion techniques according to the proposed methodology in the instant scenario will ensure the biogas yield of 10 million Nm3 within the considered administrative territory unit with a population of 4.2 million P.E., which ultimately can be expressed in electricity and thermal generation potential of 20.8 and 24.8 million kWh*y, respectively, annual greenhouse gas elimination of 119.6 thousand tons of CO2 equivalent and capital investment attraction of EUR 65.18 million. Furthermore, all sewage sludge will be subjected to disinfection and stabilization procedures to ensure its safe utilization. The findings of this study offer an opportunity for a wide range of stakeholders to assess the environmental and economic benefits of the widespread adoption of biogas technologies. The developed methodology can be utilized to inform management decisions through the use of the instant and scenario forecasts.

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Experimental evaluation of fresh human feces biogas and compost potential: Evidence for circular economy from waste streams in Ethiopia

Cited by 3 publications

References 51 publications

Factors Influencing Management of Human Excrement through Biogas Technology in Mukuru Kwa Njenga Slums, Nairobi City County Kenya

Factors Influencing Management of Human Excrement through Biogas Technology in Mukuru Kwa Njenga Slums, Nairobi City County Kenya

Perception of urine diverting dry toilet and baobab cultivation in Adaklu District of Ghana

Environmental and Economic Forecast of the Widespread Use of Anaerobic Digestion Techniques

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