Your search found 6 records
1 Njenga, M.; Mendum, R. (Eds.) 2018. Recovering bioenergy in Sub-Saharan Africa: gender dimensions, lessons and challenges. Colombo, Sri Lanka: International Water Management Institute (IWMI). CGIAR Research Program on Water, Land and Ecosystems (WLE). 96p. (Resource Recovery and Reuse: Special Issue) [doi: https://doi.org/10.5337/2018.226]
Resource recovery ; Resource management ; Bioenergy ; Gender ; Role of women ; Equity ; Poverty ; Energy generation ; Energy demand ; Energy resources ; Renewable energy ; Cooking ; Heating ; Waste management ; Human wastes ; Excreta ; Fuels ; Briquettes ; Business enterprises ; Marketing ; Sanitation ; Urban areas ; Households ; Refugees ; Supply chain ; Production factors ; Health hazards ; Economic impact ; Biogas ; Biochar ; Biomass ; Investment ; Empowerment ; Living standards ; Farmers organizations ; Biodigesters ; Gasifiers ; Community involvement ; Research and development ; Case studies / Africa South of Sahara / Uganda / Ghana / Kenya
(Location: IWMI HQ Call no: IWMI Record No: H048999)
(3 MB)
There is a strong link between gender and energy in view of food preparation and the acquisition of fuel, especially in rural areas. This is demonstrated in a range of case studies from East and West Africa, where biochar, human waste and other waste resources have been used to produce briquettes or biogas as additional high-quality fuel sources. The synthesis of the cases concludes that resource recovery and reuse for energy offers an alternative to conventional centralized grid projects which, while attractive to investors and large-scale enterprises, do not necessarily provide job opportunities for marginalized communities. Reusing locally available waste materials for energy production and as soil ameliorant (in the case of biochar) in small enterprises allows women and youth who lack business capital to begin modest, locally viable businesses. The case studies offer concrete examples of small-scale solutions to energy poverty that can make a significant difference to the lives of women and their communities.
2 Karahalios, T.; Berner, C.; Njenga, M. 2018. Human waste-to-fuel briquettes as a sanitation and energy solution for refugee camps and informal urban settlements. In Njenga, M.; Mendum, R. (Eds.). Recovering bioenergy in Sub-Saharan Africa: gender dimensions, lessons and challenges. Colombo, Sri Lanka: International Water Management Institute (IWMI). CGIAR Research Program on Water, Land and Ecosystems (WLE). pp.7-14. (Resource Recovery and Reuse: Special Issue)
Urban areas ; Human wastes ; Excreta ; Fuels ; Briquettes ; Sanitation ; Refugees ; Informal settlements ; Energy generation / Kenya / Naivasha
(Location: IWMI HQ Call no: e-copy only Record No: H049003)
(558 KB)
3 McGill, B. M.; Altchenko, Yvan; Hamilton, S. K.; Kenabatho, P. K.; Sylvester, S. R.; Villholth, Karen G. 2019. Complex interactions between climate change, sanitation, and groundwater quality: a case study from Ramotswa, Botswana. Hydrogeology Journal, 27(3):997-1015. [doi: https://doi.org/10.1007/s10040-018-1901-4]
Climate change ; Sanitation ; Groundwater management ; Water quality ; Water supply ; Water security ; Drinking water ; Monitoring ; Wastewater treatment ; Water pollution ; Ecological factors ; Environmental factors ; Environmental protection ; Nitrates ; Denitrification ; Contamination ; Aquifers ; Rainfall ; Drought ; Pit latrines ; Faecal coliforms ; Caffeine ; Human wastes ; Case studies / Africa South of Sahara / Botswana / Ramotswa
(Location: IWMI HQ Call no: e-copy only Record No: H049051)
https://link.springer.com/content/pdf/10.1007%2Fs10040-018-1901-4.pdf
https://vlibrary.iwmi.org/pdf/H049051.pdf
https://vlibrary.iwmi.org/pdf/H049051.pdf
(1.98 MB)
Groundwater quantity and quality may be affected by climate change through intricate direct and indirect mechanisms. At the same time, population growth and rapid urbanization have made groundwater an increasingly important source of water for multiple uses around the world, including southern Africa. The present study investigates the coupled human and natural system (CHANS) linking climate, sanitation, and groundwater quality in Ramotswa, a rapidly growing peri-urban area in the semi-arid southeastern Botswana, which relies on the transboundary Ramotswa aquifer for water supply. Analysis of long-term rainfall records indicated that droughts like the one in 2013–2016 are increasing in likelihood in the area due to climate change. Key informant interviews showed that due to the drought, people increasingly used pit latrines rather than flush toilets. Nitrate, fecal coliforms, and caffeine analyses of Ramotswa groundwater revealed that human waste leaching from pit latrines is the likely source of nitrate pollution. The results in conjunction indicate critical indirect linkages between climate change, sanitation, groundwater quality, and water security in the area. Improved sanitation, groundwater protection and remediation, and local water treatment would enhance reliable access to water, de-couple the community from reliance on surface water and associated water shortage risks, and help prevent transboundary tension over the shared aquifer.
4 Kassa, K.; Ali, Y.; Zewdie, W. 2018. Human urine as a source of nutrients for maize and its impacts on soil quality at Arba Minch, Ethiopia. Journal of Water Reuse and Desalination, 8(4):516-521. [doi: https://doi.org/10.2166/wrd.2018.060]
Wastewater treatment ; Human wastes ; Urine ; Agriculture ; Maize ; Plant growth ; Nutrients ; Soil quality ; Soil properties ; Soil salinity ; Semiarid zones / Ethiopia / Arba Minch
(Location: IWMI HQ Call no: e-copy only Record No: H049062)
https://iwaponline.com/jwrd/article-pdf/8/4/516/482343/jwrd0080516.pdf
https://vlibrary.iwmi.org/pdf/H049062.pdf
https://vlibrary.iwmi.org/pdf/H049062.pdf
(0.25 MB) (260 KB)
A pot experiment was conducted at Arba Minch, Ethiopia to study the effects of urine on soil properties and yield of maize in natural settings. The pot treatments consisted of 500, 800, 1,000 and 1,200 ml of neat human urine collected from a UDDT (Urine Diversion Dry Toilet) added at different portions and control. The results showed that the response of the maize for most of the variables was very well expressed or significantly different at the application rate of 500 ml of urine; however, there was no significant difference between the 500 ml and the rest of the application. A significant increase in height, diameter, and length of leaf of maize was found in the urine treated soils. An improvement in soil phosphate chemical properties was noticed with increasing addition of urine; however, there was no significant increase in the ammonium nitrogen content and pH. The salinity of treated soil significantly increased at the bottom of the pot when compared with the control. In order to limit the increase in salinity of the soil and to get optimum maize growth in natural conditions, 500 ml urine addition per maize is recommended. The findings encourage the use of urine as fertilizer and a possible sink for UDDT waste.
5 Wang, M.; Tang, T.; Burek, P.; Havlik, P.; Krisztin, T.; Kroeze, C.; Leclere, D.; Strokal, M.; Wada, Y.; Wang, Y.; Langan, Simon. 2019. Increasing nitrogen export to sea: a scenario analysis for the Indus River. Science of the Total Environment, 694:133629. [doi: https://doi.org/10.1016/j.scitotenv.2019.133629]
Water pollution ; Sea pollution ; Chemical contamination ; Nitrogen ; River basins ; International waters ; Agricultural wastes ; Human wastes ; Climate change ; Nutrient management ; Socioeconomic development ; Models ; Estimation / Pakistan / India / China / Afghanistan / Indus River
(Location: IWMI HQ Call no: e-copy only Record No: H049540)
(2.41 MB)
The Indus River Basin faces severe water quality degradation because of nutrient enrichment from human activities. Excessive nutrients in tributaries are transported to the river mouth, causing coastal eutrophication. This situation may worsen in the future because of population growth, economic development, and climate change. This study aims at a better understanding of the magnitude and sources of current (2010) and future (2050) river export of total dissolved nitrogen (TDN) by the Indus River at the sub-basin scale. To do this, we implemented the MARINA 1.0 model (Model to Assess River Inputs of Nutrients to seAs). The model inputs for human activities (e.g., agriculture, land use) were mainly from the GLOBIOM (Global Biosphere Management Model) and EPIC (Environmental Policy Integrated Model) models. Model inputs for hydrology were from the Community WATer Model (CWATM). For 2050, three scenarios combining Shared Socio-economic Pathways (SSPs 1, 2 and 3) and Representative Concentration Pathways (RCPs 2.6 and 6.0) were selected. A novelty of this study is the sub-basin analysis of future N export by the Indus River for SSPs and RCPs. Result shows that river export of TDN by the Indus River will increase by a factor of 1.6–2 between 2010 and 2050 under the three scenarios. N90% of the dissolved N exported by the Indus River is from midstream sub-basins. Human waste is expected to be the major source, and contributes by 66–70% to river export of TDN in 2050 depending on the scenarios. Another important source is agriculture, which contributes by 21–29% to dissolved inorganic N export in 2050. Thus a combined reduction in both diffuse and point sources in the midstream sub-basins can be effective to reduce coastal water pollution by nutrients at the river mouth of Indus.
6 Burt, Z.; Prasad, C. S. S.; Drechsel, Pay; Ray, I. 2021. The cultural economy of human waste reuse: perspectives from peri-urban Karnataka, India. Journal of Water, Sanitation and Hygiene for Development, 11(3):386-397. [doi: https://doi.org/10.2166/washdev.2021.196]
Waste management ; Human wastes ; Faecal sludge ; Excreta ; Resource recovery ; Organic fertilizers ; Cultural factors ; Periurban areas ; Caste systems ; Farmers' attitudes ; Agricultural workers ; Economic aspects ; Business models ; Sanitation / India / Karnataka / Dharwad / Bangalore
(Location: IWMI HQ Call no: e-copy only Record No: H050316)
https://iwaponline.com/washdev/article-pdf/11/3/386/889973/washdev0110386.pdf
https://vlibrary.iwmi.org/pdf/H050316.pdf
https://vlibrary.iwmi.org/pdf/H050316.pdf
(0.32 MB) (327 KB)
Safely managed waste reuse may be a sustainable way to protect human health and livelihoods in agrarian-based countries without adequate sewerage. The safe recovery and reuse of fecal sludge-derived fertilizer (FSF) has become an important policy discussion in low-income economies as a way to manage urban sanitation to benefit peri-urban agriculture. But what drives the user acceptance of composted fecal sludge? We develop a preference-ranking model to understand the attributes of FSF that contribute to its acceptance in Karnataka, India. We use this traditionally economic modeling method to uncover cultural practices and power disparities underlying the waste economy. We model farmowners and farmworkers separately, as the choice to use FSF as an employer versus as an employee is fundamentally different. We find that farmers who are willing to use FSF prefer to conceal its origins from their workers and from their own caste group. This is particularly the case for caste-adhering, vegetarian farmowners. We find that workers are open to using FSF if its attributes resemble cow manure, which they are comfortable handling. The waste economy in rural India remains shaped by caste hierarchies and practices, but these remain unacknowledged in policies promoting sustainable ‘business’ models for safe reuse. Current efforts under consideration toward formalizing the reuse sector should explicitly acknowledge caste practices in the waste economy, or they may perpetuate the size and scope of the caste-based informal sector.
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