Despite substantial programmatic investment in domestic bio-digesters across sub-Saharan Africa in recent years,
little empirical evidence has been published regarding the existence or magnitude of socioeconomic or environmental
benefits accruing from bio-digester implementation. A cross-sectional study of 40 households in Arusha,
Tanzania, suggests that bio-digester adoption has the potential to reduce fuel-wood use, energy-related expenditures,
and time-costs of energy procurement; to lower CO2e emissions; and to increase farm incomes. No significant
differences in synthetic fertilizer use were observed between households with and without bio-digesters.
Domestic bio-digester investments were found to have a positive net present value across a wide range of discount
rates. Further, we estimate that domestic bio-digester implementation at the countrywide level in Tanzania could
potentially access $80–$115 million annually in carbon emissions reduction (CER) financing through the Clean
Development Mechanism
Despite substantial programmatic investment in domestic bio-digesters across sub-Saharan Africa in recent years,
little empirical evidence has been published regarding the existence or magnitude of socioeconomic or environmental
benefits accruing from bio-digester implementation. A cross-sectional study of 40 households in Arusha,
Tanzania, suggests that bio-digester adoption has the potential to reduce fuel-wood use, energy-related expenditures,
and time-costs of energy procurement; to lower CO2e emissions; and to increase farm incomes. No significant
differences in synthetic fertilizer use were observed between households with and without bio-digesters.
Domestic bio-digester investments were found to have a positive net present value across a wide range of discount
rates. Further, we estimate that domestic bio-digester implementation at the countrywide level in Tanzania could
potentially access $80–$115 million annually in carbon emissions reduction (CER) financing through the Clean
Development Mechanism
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