Your search found 45 records
1 Drechsel, Pay; Danso, George. 2005. Nutrient recycling form organic waste for urban and peri-urban agriculture in West Africa: really a win-win situation? In Laband, D. N. (Ed.). Proceedings of the Conference on Emerging Issues Along Urban/Rural Interfaces: Linking Science and Society, Atlanta, Georgia, 13-16 March 2005. Alabama, AL, USA: Auburn University Center for Forest Sustainability. pp.208-213.
(Location: IWMI-HQ Call no: IWMI 631.86 G190 DRE Record No: H038172)
(8.38MB)
2 Drechsel, Pay; Quansah, C.; Asante-Mensah, S. 2001. Assessing farmers’ perceptions of organic wastes as nutrient sources. In Drechsel, P.; Kunze, D. (Eds.). Waste composting for urban and peri-urban agriculture: closing the rural-urban nutrient cycle in Sub-Saharan Africa. Colombo, Sri Lanka: International Water Management Institute (IWMI); Rome, Italy, FAO; Wallingford, UK: CABI. pp.43-54.
(Location: IWMI-HQ Call no: IWMI 631.875 G100 DRE Record No: H038896)
3 Cofie, Olufunke; Adam-Bradford, A.; Drechsel, Pay. 2006. Recycling of urban organic waste for urban agriculture. In van Veenhuizen, R. (Ed.). Cities farming for the future: Urban agriculture for green and productive Cities. Leusden, Netherlands: Network of Resource Centres on Urban Agriculture and Food Security (RUAF Foundation); Ottawa, Canada: International Development Research Centre (IDRC); Silang, Philippines: International Institute of Rural Reconstruction (IIRR). pp.210-229.
(Location: IWMI HQ Call no: IWMI 630 G178 COF Record No: H039391)
(0.44 MB) (712KB)
4 Pradhan, Surendra K.; Opuni, S. C.; Fosu, M.; Drechsel, Pay. 2013. Municipal organic waste management: challenges and opportunities in Tamale, Ghana. [Abstract only]. In Water, Engineering and Development Centre (WEDC). Delivering water, sanitation and hygiene services in an uncertain environment: preprints of the 36th WEDC International Conference, Nakuru, Kenya, 1-5 July 2013. Abstracts of papers. Leicestershire, UK: Water, Engineering and Development Centre (WEDC); Leicestershire, UK: Loughborough University. pp.72.
(Location: IWMI HQ Call no: e-copy only Record No: H046002)
(0.16 MB)
5 Pradhan, Surendra K.; Opuni, S. C.; Fosu, M.; Drechsel, Pay. 2013. Municipal organic waste management: challenges and opportunities in Tamale, Ghana. Paper presented at the 36th WEDC [Water, Engineering and Development Centre] International Conference on Delivering Water, Sanitation and Hygiene Services in an Uncertain Environment, Nakuru, Kenya, 1-5 July 2013. 5p.
(Location: IWMI HQ Call no: e-copy only Record No: H046059)
(0.71 MB)
6 Rauschkolb, R. S. 1971. Land degradation. Rome, Italy: FAO. 105p. (FAO Soils Bulletin 13)
(Location: IWMI HQ Call no: 333 G000 RAU Record No: H046167)
(21.83 MB) (21.83MB)
7 Impraim, Robert; Nikiema, Josiane; Cofie, Olufunke; Rao, Krishna. 2014. Value from faecal sludge and municipal organic waste: fertilizer cum soil conditioner in Ghana. Paper presented at the 37th WEDC [Water, Engineering and Development Centre] International Conference on Sustainable Water and Sanitation Services for All in a Fast Changing World, Hanoi, Vietnam, 15-19 September 2014. 6p.
(Location: IWMI HQ Call no: e-copy only Record No: H046659)
(0.39 MB)
Ghana is confronted with waste management challenges. with 20-40% uncollected solid waste in most cities. Also. large volumes of faecal sludge are discharged untreated into the environment. Although these wastes pose serious environmental concerns, they also contain nutrients and organic matter essential for improving soil agricultural productivity. The International Water Management Institute (IWMI), since 2001. has researched into nutrient and organic matter recovery from faecal sludge and organic solid waste in Ghana and some Asian countries such as India, Sri Lanka or Bangladesh. This has led to the production of various formulations of faecal sludge based compost (with "Fortifer" as a generic 'brand '), both in the form ofpellets and powders, and specifically an ongoing project aiming at producing and commercializing the Fortifer in Ghana through a Public Private Partnership. This paper presents a summary of Fortifer technology, project objectives as well as lessons learnt during its implementation.
8 Danso, George; Drechsel, Pay. 2014. Nutrient recycling from organic wastes through viable business models in peri-urban areas in Sub-Saharan Africa. In Maheshwari, B.; Purohit, R.; Malano, H.; Singh, V. P.; Amerasinghe, Priyanie. (Eds.). The security of water, food, energy and liveability of cities: challenges and opportunities for peri-urban futures. Dordrecht, Netherlands: Springer. pp.311-323. (Water Science and Technology Library Volume 71)
(Location: IWMI HQ Call no: IWMI Record No: H046691)
(3.97 MB)
A major challenge of urbanisation, for relevant decision makers, is the provision of sufficient food and water for the emerging mega-cities and appropriate peri-urban sanitation management. This paper focuses on the results of a project carried out by International Water Management Institute (IWMI) in three major cities in Ghana. The project was designed to provide decision support for nutrient recycling from organic waste in peri-urban areas, through waste composting or co-composting with nightsoil. Experiences of existing compost stations from Nigeria, Benin, Mali, Burkina Faso and Togo were taken into consideration to formulate the research framework. Apart from the technical aspect, the study looked at actual waste supply and its quality, a quantification of the compost demand as well as economic viability of different scenarios and legal implications. The analysis showed that from the city perspective cost savings are only possible if large volumes of waste can be composted to reduce waste transport costs while compost sale (and agricultural use) is not a necessity from the perspective of cost savings. In fact, despite much interest the farmers’ willingness to pay remained limited at the reservation price of US$5 per 50 kg bag. As this includes transport costs peri-urban areas will be those benefiting most from composting projects. Closing the rural-urban nutrient cycle appears unrealistic given the increasing transport distance; at least as long as smallholder farmers are targeted. However, the consideration of alternative customer segments and implementation of innovative business models could help in reaching different scales.
(Location: IWMI HQ Call no: IWMI Record No: H046695)
(4 MB)
10 de Zeeuw, H.; Drechsel, Pay. (Eds.) 2015. Cities and agriculture: developing resilient urban food systems. Oxon, UK: Routledge - Earthscan. 431p.
(Location: IWMI HQ Call no: IWMI Record No: H047224)
(20.6 MB)
11 Drechsel, Pay; Keraita, Bernard; Cofie, Olufunke O.; Nikiema, Josiane. 2015. Productive and safe use of urban organic wastes and wastewater in urban food production systems in low-income counties. In de Zeeuw, H.; Drechsel, Pay (Eds.). Cities and agriculture: developing resilient urban food systems. Oxon, UK: Routledge - Earthscan. pp.162-191.
(Location: IWMI HQ Call no: IWMI Record No: H047225)
(1.98 MB) (50.6 MB)
(Location: IWMI HQ Call no: IWMI Record No: H047536)
(3 MB)
Biological treatment, composting, in particular, is a relatively simple, durable and inexpensive alternative for stabilizing and reducing biodegradable waste. Co-composting of different waste sources allows to enhance the compost nutrient value. In particular, integration of ‘biosolids’ from the sanitation sector as potential input material for co-composting would provide a solution for the much needed treatment of fecal sludge from on-site sanitation systems, and make use of its high nutrient content. This research paper elaborates in detail the main parameters that govern the co-composting process as well as factors that control the production of a safe and valuable quality compost. It further explains technological options to tailor the final product to crop and farmer needs.
13 Gianfelici, F.; Lancon, L.; Bucatariu, C.; Dubbeling, M.; Santini, G.; Fernando, Sudarshana. 2016. Composting urban organic waste into agricultural inputs: Balangoda, Sri Lanka. In Dubbeling, M.; Bucatariu, C.; Santini, G.; Vogt, C.; Eisenbeiss, K. City region food systems and food waste management: linking urban and rural areas for sustainable and resilient development. Eschborn, Germany: Deutsche Gesellschaft fur Internationale Zusammenarbeit (GIZ) GmbH. pp.172-182.
(Location: IWMI HQ Call no: e-copy only Record No: H047773)
(5.05 MB)
As in other cities of Sri Lanka, solid waste management has been a key problem in and concern for Balangoda Urban Council. Waste accumulations in the city have caused many problems, including unpleasant odours, contamination of water bodies, and contamination of paddy fields, giving rise to epidemic diseases such as Salmonella, typhoid fever, and diarrhoea. A Balangoda compost plant has been set up to process municipal solid waste into compost. The project started in 1999 as a city service to provide a solution to the solid waste problem, but converted into a business in later years. Integrated waste management in Balangoda now consists of a Municipal Solid Waste compost plant, septage treatment plant, plastic pelletiser and an open dump. In addition, as there is increasing awareness of environmental and health risks related to the use of agro-chemical fertilisers, demand for alternative – organic – fertilisers is increasing. As per the majority of the compost plants in the country, the Balangoda plants are located in semi-urban or rural areas, facilitating reuse of waste in agriculture, with farming areas located near the compost plants. The Balangoda system thus operationalises rural-urban linkages through the collection of urban food and organic waste and its recycling, sale, and reuse as compost for rural (and peri-urban) producers.
14 Grau, Felix; Drechsel, Nikita; Trautz, D.; Weerakody, J.; Ranaweera, B. 2016. Fertiliser derived from fecal sludge in Sri Lanka: analysis of plant nutritional value and heavy metal contamination. Paper presented at the Annual Tropical and Subtropical Agricultural and Natural Resource Management (Tropentag) Conference on Food Security, Natural Resource Management and Rural Development, Vienna, Austria, 18-21 September 2016. 4p.
(Location: IWMI HQ Call no: e-copy only Record No: H047836)
(Location: IWMI HQ Call no: e-copy only Record No: H047875)
In response to changing urban food systems, short supply chains have been advocated to meet urban food needs while building more sustainable urban food systems. Despite an increasing interest in urban food supply and the flows of food from production to consumption, there is a lack of empirical studies and methodologies which systematically analyse the actual proportion and nutritional significance of local and regional food supplied to urban markets. The aim of this empirical study therefore was to compare the geographical sources supplying food to the urban population (“foodsheds”) in Tamale, Ghana and Ouagadougou, Burkina Faso, to record the supplied quantities and to assess the level of interaction between the sources and the respective city. The study was conducted over two years, covering the seasons of abundant and short supply, via traffic surveys on the access roads to the two cities, and in the Tamale markets, resulting altogether in more than 40,000 records of food flow. Results indicated that food sources were highly crop- and season-specific, ranging from one-dimensional to multi-dimensional foodsheds with diverse sources across seasons. Across the commodity-specific foodsheds, city region boundaries were established. Within the proposed city region a relatively large proportion of smallholders contributed to urban food supply, taking advantage of the proximity to urban markets. While food provided from within the city region offers certain place-based benefits, like the provision of fresh perishable crops, a larger geographical diversity of foodsheds appeared to enhance the resilience of urban food systems, such as against climate related production failures.
(Location: IWMI HQ Call no: e-copy only Record No: H047940)
(2.67 MB)
During the past decades, many composting projects have been implemented with the assistance from various donor agencies to address the municipal solid waste (MSW) problem in developing countries, especially in urban areas. However, very few of these projects are sustainable and many were reported as failures, some even closed down and most ofexisting operations rely on heavy subsidies from the Government, foreign funding sources and Local Authorities (LAs). To enhance solid waste management (SWM) an initiative called "Pilisaru" project started in 2008 lead by the Central Environmental Authority (CEA) to develop the infrastructures of LAs for a better S WM system mainly focllsing on composting as an efficient low cost option for treatment of the organic waste fraction. However, the initial assessment of this initiative encountered many issues. Therefore, this study was proposed to identifY main lactors that affect the sustainability of municipal compost plants. The methods used to obtain data for this research comprise, sample survey that involved five selected compost plants operating under LAs in Sri Lanka; a specific lield survey that observed waste segregation activities: and a cl ients perception survey conducted in a super market in Colombo that aimed to assess customers perspective 011 buying and use ofcompost based I"bod products. To supplement the findings ofthese investigations, a complementary literature revie\\ and selected expert interviews were carried out with representative stakeholders. The research findings indicate that most of LAs do not have the needed expertise to design, implement and manage an integrated S WM system that allows efticient operation of compost plants according to recognized standards. Furthermore, it appears that 1110st ofthe compost plants do not manage it full-cost recovery of their O&M cost with the main issues that users are not charged for the provided waste management services and .produced compost can not be marketed successfully, Besides, from the perspective of sustainable operation, need and provision offuture investment is unclear, especially for replacement to maintain an effective operation level. To overcome the emerging weaknesses of the Pilisaru project, it is recommended to provide a continuous capacity building programme for the LAs and involved stakeholders, supported by public awareness programs, especially lor enhanced waste segregation, marketing promotion for compost products as well as technical and financial assistance for relevant stakeholders that need support to perform their tasks in the SW value chain. Furthermore, it is envisioned to revisit the provided SWM policies and to add regulations that built on insights from best SWM practices in Sri Lanka but also from applicable international experiences from other developing countries. This should also include the production of quality compost that meets the fertilizer demands from an agriculture perspective. Lastly, the enhancement of waste segregation practices and involvement of the private sector should be addressed in order to strengthen operations and business performance through enhanced public participation and Private-Public-Partnerships (PPP).
(Location: IWMI HQ Call no: IWMI Record No: H047991)
(2 MB)
Where modern heating and cooking fuels for domestic, institutional, commercial and industrial use are not readily available, briquettes made from biomass residues could contribute to the sustainable supply of energy. This study reviews the briquette making process, looking at the entire value chain starting from the type and characteristics of feedstock used for briquette making to the potential market for briquettes in developing countries. It also analyzes the role that gender plays in briquette production. Depending on the raw materials used and technologies applied during production, fuel briquettes come in different qualities and dimensions, and thus require appropriate targeting of different market segments. Key drivers of success in briquette production and marketing include ensuring consistent supply of raw materials with good energy qualities, appropriate technologies, and consistency in the quality and supply of the briquettes. Creating strong partnerships with key stakeholders, such as the municipality, financiers and other actors within the briquette value chain, and enabling policy are important drivers for the success of briquette businesses.
(Location: IWMI HQ Call no: e-copy only Record No: H047992)
(585 KB)
Purpose: Faecal sludge (FS) has been co-composted with many organic solid wastes globally. Agricultural wastes, such as oil palm empty fruit bunches (EFB) and cocoa pod husks (CPH), have received very little research attention as far as combining with FS is concerned. This study aimed at co-composting these wastes at different ratios to produce safe compost for use as soilless medium for raising tomato transplants. Methods: Dewatered FS (DFS) was mixed with shredded EFB and CPH at five different ratios: 1DFS:1EFB, 1DFS:1CPH, and DFS:EFB:CPH in ratios of 1:1:1, 2:1:1, and 2:2:1 and composted for 3 months. Select physicochemical parameters and pathogens were monitored every fortnightly and 3 weeks, respectively. Results: Maximum temperatures obtained ranged 46.8–54.5 °C. Though these temperatures were lower than sanitizing temperatures prescribed by USEPA, no E. coli was found in any of the piles at the end of composting. The ratio 2DFS:2EFB:1CPH was found to be the safest formulation and hence was used to grow tomato under greenhouse conditions. Tomato seeds were sown in three different growing media: 100% FS-based compost, 100% rice husk biochar, and 50% FS-based compost–50% rice husk biochar mix. Conclusion: Results showed that FS-based compost was a suitable growing medium for tomato. Further studies into the optimal rate and frequency of application of compost teas on tomato are recommended.
19 Otoo, Miriam; Fernando, Sudarshana; Jayathilake, Nilanthi; Aheeyar, Mohamed; Madurangi, Ganesha. 2016. Opportunities for sustainable municipal solid waste management services in Batticaloa: business strategies for improved resource recovery. [Project report submitted to United Nations Office for Project Services (UNOPS) as a part of the research project on Opportunities for Sustainable Municipal Solid Waste Management Services in Batticaloa: Business Strategies for Improved Rresource Recovery and Reuse] Colombo, Sri Lanka: International Water Management Institute (IWMI). 71p.
(Location: IWMI HQ Call no: e-copy only Record No: H048062)
(4.41 MB)
20 Otoo, Miriam; Drechsel, Pay. (Eds.) 2018. Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan. 816p.
(Location: IWMI HQ Call no: IWMI Record No: H048622)
(28.1 MB)
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