Your search found 120 records
1 Cofie, Olufunke; Nikiema, Josiane; Impraim, Robert; Adamtey, N.; Paul, Johannes; Kone, D. 2016. Co-composting of solid waste and fecal sludge for nutrient and organic matter recovery. Colombo, Sri Lanka: International Water Management Institute (IWMI). CGIAR Research Program on Water, Land and Ecosystems (WLE). 47p. (Resource Recovery and Reuse Series 03) [doi: https://doi.org/10.5337/2016.204]
Resource recovery ; Environmental effects ; Nutrients ; Solid wastes ; Recycling ; Composting ; Faecal coliforms ; Sewage sludge ; Urbanization ; Urban wastes ; Food wastes ; Waste management ; Developing countries ; Farmyard manure ; Excreta ; Soil organic matter ; Organic wastes ; Organic fertilizers ; Public health ; Health hazards ; Sanitation ; Moisture content ; Temperature ; pH ; Microorganisms ; Aeration ; Pathogens ; Emission ; Livestock ; Heavy metals
(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.
2 Drechsel, Pay; Hanjra, Munir A. 2016. Green opportunities for urban sanitation challenges through energy, water and nutrient recovery. In Dodds, F.; Bartram, J. (Eds.). The water, food, energy and climate nexus: challenges and an agenda for action. Oxon, UK: Routledge - Earthscan. pp.204-218.
Resource recovery ; Nutrients ; Energy management ; Water management ; Urban areas ; Sanitation ; Wastewater treatment ; Freshwater ; Water reuse ; Water footprint ; Drinking water ; Metabolism
(Location: IWMI HQ Call no: e-copy only Record No: H047567)
(1.67 MB)
3 Otoo, Miriam; Drechsel, Pay; Danso, G.; Gebrezgabher, Solomie; Rao, Krishna; Madurangi, Ganesha. 2016. Testing the implementation potential of resource recovery and reuse business models: from baseline surveys to feasibility studies and business plans. Colombo, Sri Lanka: International Water Management Institute (IWMI). CGIAR Research Program on Water, Land and Ecosystems (WLE). 59p. (Resource Recovery and Reuse Series 10) [doi: https://doi.org/10.5337/2016.206]
Resource recovery ; Resource management ; Water reuse ; Business management ; Models ; Performance indexes ; Indicators ; Waste management ; Waste treatment ; Sanitation ; Subsidies ; Public sector ; Private sector ; Developing countries ; Economic analysis ; Investment ; Cost recovery ; Environmental impact assessment ; Public health ; Health hazards ; Feasibility studies ; Decision making ; Socioeconomic environment ; Risk analysis ; Legal aspects ; Institutions ; Marketing policies ; Stakeholders
(Location: IWMI HQ Call no: IWMI Record No: H047601)
(4 MB)
4 Mayer, B. K.; Baker, L. A.; Boyer, T. H.; Drechsel, Pay; Gifford, M.; Hanjra, Munir A. 2016. Total value of phosphorus recovery. Environmental Science & Technology, 50(13):6606-6620. [doi: https://doi.org/10.1021/acs.est.6b01239]
Resource recovery ; Phosphorus ; Renewable energy ; Food production ; Food security ; Waste water treatment plants ; Eutrophication ; Water pollution ; Water reuse ; Water quality ; Heavy metals ; Minerals ; Social aspects ; Equity ; Fertilizers ; Environmental effects ; Urban wastes
(Location: IWMI HQ Call no: e-copy only Record No: H047624)
(3.33 MB)
Phosphorus (P) is a critical, geographically concentrated, nonrenewable resource necessary to support global food production. In excess (e.g., due to runoff or wastewater discharges), P is also a primary cause of eutrophication. To reconcile the simultaneous shortage and overabundance of P, lost P flows must be recovered and reused, alongside improvements in P-use efficiency. While this motivation is increasingly being recognized, little P recovery is practiced today, as recovered P generally cannot compete with the relatively low cost of mined P. Therefore, P is often captured to prevent its release into the environment without beneficial recovery and reuse. However, additional incentives for P recovery emerge when accounting for the total value of P recovery. This article provides a comprehensive overview of the range of benefits of recovering P from waste streams, i.e., the total value of recovering P. This approach accounts for P products, as well as other assets that are associated with P and can be recovered in parallel, such as energy, nitrogen, metals and minerals, and water. Additionally, P recovery provides valuable services to society and the environment by protecting and improving environmental quality, enhancing efficiency of waste treatment facilities, and improving food security and social equity. The needs to make P recovery a reality are also discussed, including business models, bottlenecks, and policy and education strategies.
5 Gebrezgabher, Solomie; Amewu, Sena; Taron, Avinandan; Otoo, Miriam. 2016. Energy recovery from domestic and agro-waste streams in Uganda: a socioeconomic assessment. Colombo, Sri Lanka: International Water Management Institute (IWMI). CGIAR Research Program on Water, Land and Ecosystems (WLE). 52p. (Resource Recovery and Reuse Series 09) [doi: https://doi.org/10.5337/2016.207]
Resource recovery ; Water reuse ; Energy generation ; Business management ; Models ; Socioeconomic environment ; Environmental impact assessment ; Economic analysis ; Fuels ; Fuelwood ; Agriculture ; Residues ; Transport ; Briquettes ; Social impact ; Gasification ; Biogas ; Greenhouse gases ; Methane ; Emission ; Benefits ; Household wastes ; Electricity generation ; Sanitation ; Excreta ; Waste management ; Wastewater ; Farmers ; Public health ; Rivers / Uganda
(Location: IWMI HQ Call no: IWMI Record No: H047671)
(1 MB)
Recovering energy from waste offers dual benefits – a) improved waste management, and b) provision of reliable energy to households, institutions and commercial entities. In this report, we present a socioeconomic assessment of three energy business models (briquette manufacturing, on-site (public toilet) energy generation, and agro-waste electricity generation) based on feasibility studies carried out in the city of Kampala, Uganda. We assess the potential economic, environmental and social impacts of waste-to-energy business models taking into consideration a life cycle of emissions to provide decision makers with the overall costs and benefits of the models to society versus a business-as-usual scenario.
6 Rao, Krishna C.; Kvarnstrom, E.; Di Mario, L.; Drechsel, Pay. 2016. Business models for fecal sludge management. Colombo, Sri Lanka: International Water Management Institute (IWMI). CGIAR Research Program on Water, Land and Ecosystems (WLE). 80p. (Resource Recovery and Reuse Series 06) [doi: https://doi.org/10.5337/2016.213]
Faecal sludge ; Resource management ; Resource recovery ; Recycling ; Business management ; Models ; Waste disposal ; Desludging ; Dumping ; Sewerage ; Waste treatment ; Waste water treatment plants ; Solid wastes ; Pollution ; Composts ; Public health ; Sanitation ; Latrines ; Defaecation ; Stakeholders ; Finance ; Cost recovery ; Energy recovery ; Biogas ; Organic fertilizers ; Private enterprises ; Institutions ; Partnerships ; Licences ; Regulations ; Transport ; Septic tanks ; Nutrients ; Taxes ; Farmers ; Urban areas ; Landscape ; Household ; Incentives ; Case studies / Asia / Africa / Latin America / South Africa / Kenya / India / Rwanda / Nepal / Philippines / Lesotho / Bangladesh / Mozambique / Ghana / Senegal / Benin / Sierra Leone / Malaysia / Ethiopia / Vietnam / Mali / Sri Lanka / Burkina Faso / Peru / Haiti / Dakar / Nairobi / Maseru / Accra / Tamale / Addis Ababa / Eastern Cape / Maputo / Dhaka / Ho Chi Minh City / Hai Phong / Dumaguete / Mombasa / Kisumu / San Fernando / Bamako / Cotonou / Ouagadougou / Kigali / Bangalore / Dharwad / Balangoda
(Location: IWMI HQ Call no: IWMI Record No: H047826)
(4.75 MB)
On-site sanitation systems, such as septic tanks and pit latrines, are the predominant feature across rural and urban areas in most developing countries. However, their management is one of the most neglected sanitation challenges. While under the Millennium Development Goals (MDGs), the set-up of toilet systems received the most attention, business models for the sanitation service chain, including pit desludging, sludge transport, treatment and disposal or resource recovery, are only emerging. Based on the analysis of over 40 fecal sludge management (FSM) cases from Asia, Africa and Latin America, this report shows opportunities as well as bottlenecks that FSM is facing from an institutional and entrepreneurial perspective.
7 Hettiarachchi, Lakshika; Fernando, Sudarshana; Gunawardena, S.; Jayathilake, Nilanthi; Paul, Johannes G.; Grau, Felix. 2016. Strength and disintegration characteristics of compost pellets produced from urban waste in Sri Lanka. 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. 5p.
Urban wastes ; Composting ; Pellets ; Resource recovery ; Liquid wastes ; Solid wastes ; Nutrients ; Waste treatment ; Fertilizers / Sri Lanka
(Location: IWMI HQ Call no: e-copy only Record No: H047837)
http://www.tropentag.de/2016/abstracts/links/Paul_gYCioIdz.pdf
https://vlibrary.iwmi.org/pdf/H047837.pdf
https://vlibrary.iwmi.org/pdf/H047837.pdf
(347KB)
8 Sinnathamby, V.; Paul, Johannes G.; Dasanayaka, S. W. S. B.; Gunawardena, S. H. P.; Fernando, Sudarshana. 2016. Factors affecting sustainability of municipal solid waste composting projects in Sri Lanka. In University of Moratuwa. Department of Management of Technology. Conference Proceedings of International Conference in Technology Management. Moratuwa, Sri Lanka: University of Moratuwa. Department of Management of Technology. pp.98-103.
Waste management ; Waste treatment ; Urban wastes ; Solid wastes ; Organic wastes ; Composting ; Sustainability ; Value chain ; Developing countries ; Organic fertilizers ; Resource recovery ; Capacity building ; Stakeholders ; Private sector ; Public sector ; Partnerships ; Food production / Sri Lanka / Moratuwa
(Location: IWMI HQ Call no: e-copy only Record No: H047940)
https://www.mrt.ac.lk/web/sites/default/files/web-page-uploads/iNCOTeM%202016%20Conference%20Proceeding_0.pdf
https://vlibrary.iwmi.org/pdf/H047940.pdf
https://vlibrary.iwmi.org/pdf/H047940.pdf
(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).
9 Arceivala, S. J.; Asolekar, S. R. 2007. Wastewater treatment for pollution control and reuse. 3rd ed. New Delhi, India: McGraw-Hill Education. 518p.
Wastewater Management ; Waste water treatment plants ; Pollution control ; Ecosystem approaches ; Waste disposal ; Environmental impact assessment ; Urban wastes ; Solid wastes ; Slums ; Sewerage ; Sanitation ; Mechanical methods ; Aerobic treatment ; Bioreactors ; Biological treatment of pollutants ; Sludge treatment ; Anaerobic treatment ; Physicochemical treatment ; Membrane processes ; Aerated lagoons ; Stabilization ponds ; Fish ponds ; Hyacinthus ; Duckweed ; Constructed wetlands ; Vermiculture ; Algal growth ; Oxygen requirement ; Phosphorus removal ; Nitrification ; Denitrification ; Wastewater irrigation ; Irrigation systems ; Soil properties ; Agriculture ; Water reuse ; Industrial uses ; Water conservation ; Groundwater recharge ; Water supply ; Public distribution system ; Resource recovery ; Sustainability ; Planning ; Guidelines / India
(Location: IWMI HQ Call no: 628.3 G000 ARC Record No: H047990)
(0.67 MB)
10 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.
Urban wastes ; Waste management ; Solid wastes ; Resource recovery ; Composting ; Local authorities ; Health hazards ; Waste water treatment plants ; Organic wastes ; Waste disposal ; Urban wastes ; Food wastes ; Curing ; Business management ; Market economics ; Assessment ; Farmer participation ; Organic fertilizers ; Nutrients ; Cost recovery ; Financial situation ; Profitability ; Price fixing ; Capacity building ; Training / Sri Lanka / Batticaloa
(Location: IWMI HQ Call no: e-copy only Record No: H048062)
(4.41 MB)
11 Otoo, Miriam; Rao, Krishna; Taron, Avinandan. 2015. Synthesis report on feasibility assessment for the implementation of RRR [resource recovery and reuse] business models proposed for Lima. Colombo, Sri Lanka: International Water Management Institute (IWMI) 73p.
Feasibility studies ; Assessment ; Resource recovery ; Business management ; Health hazards ; Public health ; Environmental policy ; Environmental impact assessment ; Risk assessment ; Wastewater treatment ; Wastewater irrigation ; Urban wastes ; Industrial wastes ; Water reuse ; Sanitation ; Faecal sludge ; Energy generation ; Socioeconomic environment ; Nutrients ; Cost recovery ; Market economics ; Aquaculture ; Organic fertilizers ; Corporate culture ; Legal aspects ; Technology assessment ; Composting / Peru / Lima
(Location: IWMI HQ Call no: e-copy only Record No: H048073)
(2.09 MB)
12 Otoo, Miriam; Rao, Krishna; Taron, Avinandan. 2015. Synthesis report on feasibility assessment for the implementation of RRR [resource recovery and reuse] business models proposed for Bangalore. Colombo, Sri Lanka: International Water Management Institute (IWMI) 73p.
Feasibility studies ; Assessment ; Resource recovery ; Business management ; Market economics ; Environmental impact assessment ; Risk assessment ; Faecal sludge ; Urban wastes ; Solid wastes ; Industrial wastes ; Wastewater treatment ; Wastewater irrigation ; Water reuse ; Nutrients ; Composting ; Health hazards ; Public health ; Briquettes ; Organic fertilizers ; Sanitation ; Cost recovery ; Socioeconomic environment / India / Bangalore
(Location: IWMI HQ Record No: H048074)
(1.80 MB)
13 Otoo, Miriam; Rao, Krishna; Taron, Avinandan. 2015. Synthesis report on feasibility assessment for the implementation of RRR [resource recovery and reuse] business models proposed for Hanoi. Colombo, Sri Lanka: International Water Management Institute (IWMI) 81.
Feasibility studies ; Assessment ; Resource recovery ; Business management ; Market economics ; Environmental impact assessment ; Risk assessment ; Faecal sludge ; Urban wastes ; Solid wastes ; Industrial wastes ; Wastewater treatment ; Wastewater irrigation ; Water reuse ; Nutrients ; Composting ; Health hazards ; Public health ; Briquettes ; Organic fertilizers ; Sanitation ; Cost recovery ; Socioeconomic environment / Vietnam / Hanoi
(Location: IWMI HQ Call no: e-copy only Record No: H048075)
(1.47 MB)
14 Otoo, Miriam; Taron, Avinandan; Danso, George; Madurangi, Ganesha; Ekere, W.; Dungu, S. 2015. Market assessment of RRR [resource recovery and reuse] business models-Kampala city report. Colombo, Sri Lanka: International Water Management Institute (IWMI). 121p.
Resource recovery ; Market economies ; Business management ; Fuels ; Briquettes ; Energy generation ; Electricity generation ; Legal aspects ; Sanitation ; Organic fertilizers ; Wastewater irrigation ; Wastewater treatment ; Faecal sludge ; Solid wastes ; Composting ; Renewable energy ; Socioeconomic environment ; Household consumption ; Supply chain ; Farmers ; Water resources ; Water availability ; Water use ; Irrigated farming / Uganda / Kampala
(Location: IWMI HQ Call no: e-copy only Record No: H048076)
(1.99 MB)
15 Otoo, Miriam; Taron, Avinandan; Danso, George; Madurangi, Ganesha; Subrahmanya, M. H. B.; Ramachandran, P.; Balachandra, P.; Sudhira, H. S. 2015. Market assessment of RRR [resource recovery and reuse] business models-Bangalore city report. Colombo, Sri Lanka: International Water Management Institute (IWMI). 134p.
Resource recovery ; Market economies ; Business management ; Fuels ; Briquettes ; Energy generation ; Electricity generation ; Legal aspects ; Sanitation ; Organic fertilizers ; Wastewater irrigation ; Wastewater treatment ; Faecal sludge ; Solid wastes ; Composting ; Renewable energy ; Socioeconomic environment ; Household consumption ; Supply chain ; Farmers ; Water resources ; Water availability ; Water use ; Irrigated farming / India / Bangalore
(Location: IWMI HQ Call no: e-copy only Record No: H048077)
(2.72 MB)
16 Otoo, Miriam; Rao, Krishna; Taron, Avinandan. 2015. Synthesis report on feasibility assessment for the implementation of RRR [resource recovery and reuse] business models proposed for Kampala. Report output of a part of Resource Recovery and Reuse project: from research to implementation. Colombo, Sri Lanka: International Water Management Institute (IWMI). 73p.
Resource recovery ; Feasibility studies ; Assessment ; Business management ; Market structure ; Environmental health ; Environmental impact assessment ; Risk assessment ; Urban wastes ; Solid wastes ; liquid wastes ; Waste management ; Waste disposal ; Wastewater irrigation ; Waste water treatment plants ; Health hazards ; Sanitation ; Faecal sludge ; Nutrients ; Organic fertilizers ; Soil conditioners ; State intervention ; Economic aspects ; Industrial wastes ; Briquettes ; Energy generation ; Cost recovery ; Composting ; Economic analysis / Uganda / Kampala
(Location: IWMI HQ Call no: e-copy only Record No: H048064)
(1.66 MB)
17 Zacharof, M.-P.; Lovitt, R. W. 2015. Adding value to wastewater by resource recovery and reformulation as growth media: current prospects and potential. Journal of Water Reuse and Desalination, 5(4):473-479. [doi: https://doi.org/10.2166/wrd.2015.117]
Wastewater treatment ; Resource recovery ; Sustainability ; Membranes ; Technology ; Microbial activities ; Growing media ; Chemical composition ; Formulations ; Filtration ; Nutrients ; Costs ; Case studies
(Location: IWMI HQ Call no: e-copy only Record No: H048099)
(0.25 MB)
Wastewater, despite being a serious environmental constraint, has been identified as a source of valuable commodities including phosphate, ammonia, metal ions and volatile fatty acids. Using low-cost physical pre-treatments, filtration technology gives the opportunity of recovering materials in purified concentrated liquid form and purified water. Filtration also allows manipulation of the nutrient content in the effluents enabling the formulation of a series of streams enriched with important chemical components, enabling their reformulation into balanced nutrient media for microbial growth and the production of biofuels, acids and other chemicals such as lipids and enzymes. This approach benefits industry through the use of a relatively abundant inexpensive feedstock able to be recycled to produce high value chemicals while reducing the carbon footprint of the fermentation and reducing waste disposal. Examples of potential schemes of nutrient formulation and their application are presented.
18 Rao, Krishna C.; Otoo, Miriam; Drechsel, Pay; Hanjra, Munir A. 2017. Resource recovery and reuse as an incentive for a more viable sanitation service chain. Water Alternatives, 10(2):493-512.
Resource recovery ; Sanitation ; Public health ; Incentives ; Faecal sludge ; Business management ; Cost recovery ; Waste treatment ; Wastewater treatment ; Nutrients ; Private sector ; Public sector ; Stakeholders ; Excreta ; Pit latrines ; Waste disposal ; Composting ; Organic matter / India / Ghana
(Location: IWMI HQ Call no: e-copy only Record No: H048169)
http://www.water-alternatives.org/index.php/alldoc/articles/vol10/v10issue2/367-a10-2-17/file
https://vlibrary.iwmi.org/pdf/H048169.pdf
https://vlibrary.iwmi.org/pdf/H048169.pdf
(1.33 MB)
Recovering nutrients, water and energy from domestic waste streams, including wastewater and faecal sludge, is slowly gaining momentum in low-income countries. Resource recovery and reuse (RRR) offers value beyond environmental benefits through cost recovery. An expected game changer in sanitation service provision is a business model where benefits accrued via RRR can support upstream sanitation services despite the multitude of private and public stakeholders involved from waste collection to treatment. This paper shows options of how resource recovery and reuse can be an incentive for the sustainable sanitation service chain, by recovering costs where revenue can feed back internally or using generated revenues from reuse to fill financial gaps across the service chain to complement other supporting mechanisms for making waste management more attractive.
19 Grau, Felix; Drechsel, Nikita; Haering, V.; Trautz, D.; Weerakkody, W. J. S. K.; Drechsel, Pay; Marschner, B.; Dissanayake, D. M. P. S.; Sinnathamby, V. 2017. Impact of fecal sludge and municipal solid waste co-compost on crop growth of Raphanus Sativus L. and Capsicum Anuum L. under stress conditions. Resources, 6(3):1-12. [doi: https://doi.org/10.3390/resources6030026]
Faecal sludge ; Urban wastes ; Solid wastes ; Composting ; Crop improvement ; Raphanus sativus ; Capsicum annuum ; Stress conditions ; Agricultural practices ; Resource recovery ; Organic matter ; Waste management ; Waste treatment ; Inorganic fertilizers ; Drought ; Nutrients ; Cost benefit analysis / Sri Lanka
(Location: IWMI HQ Call no: e-copy only Record No: H048191)
(1.15 MB)
Co-composted dewatered faecal sludge (FS) with organic fractions of municipal solid waste (MSW) has a high potential to be used as an agricultural resource in Sri Lanka. In addition to options for cost recovery in waste management, closing the nutrient and carbon cycles between urban and rural areas, substitution of mineral fertilizers, reduced pollution. and the restoration of degraded arable land are possible with important benefits. Up to now little is known about the usage of FS-MSW as fertilizer and it needs to be studied in order to achieve a better understanding and generate application recommendations. The aim of these experiments has been to evaluate the possibility of substituting mineral fertilization. Two field experiments were conducted on sandy loam to assess the effects of MSW compost and FS-MSW co-compost, its pelletized forms, and mineral-enriched FS-MSW on crop growth. As a short-term crop Raphanus sativus “Beeralu rabu” (radish) was studied for 50 days in a randomized complete block design (RCDB). Results show that, under drought conditions, FS-MSW co-compost increased the yield significantly, while MSW and FS-MSW compost enabled the highest survival rate of the plants. Similarly, the second field trial with a long-term crop, Capsicum anuum “CA-8” (capsicum), was planted as RCBD, using the same treatments, for a cultivation period of 120 days. Results display that during a drought followed by water saturated soil conditions co-compost treatments achieved comparable yields and increased the survival rate significantly compared to the control, fertilized with urea, triple super phosphate, and muriate of potash. Cost-benefit analysis (CBA) revealed that pelletizing decreased the monetary benefits if only fertilizer value is considered. It can be concluded that, under drought and water stress, co-compost ensures comparable yields and enables more resistance, but might not be economical viable as a one-crop fertilizer. These findings need to be validated with further trials under different climate regimes and soils.
20 Danso, G. K.; Otoo, Miriam; Ekere, W.; Ddungu, S.; Madurangi, Ganesha. 2017. Market feasibility of faecal sludge and municipal solid waste-based compost as measured by farmers’ willingness-to-pay for product attributes: evidence from Kampala, Uganda. Resources, 6(2):1-17. [doi: https://doi.org/10.3390/resources6030031]
Faecal sludge ; Urban wastes ; Solid wastes ; Composts ; Willingness to pay ; Nutrients ; Resource recovery ; Cost recovery ; Organic fertilizers ; Farmer participation ; Economic aspects / Uganda / Kampala
(Location: IWMI HQ Call no: e-copy only Record No: H048217)
(260 KB)
There is a great potential to close the nutrient recycling loop, support a ‘circular economy’ and improve cost recovery within the waste sector and to create viable businesses via the conversion of waste to organic fertilizers. Successful commercialization of waste-based organic fertilizer businesses however largely depends on a sound market. We used a choice experiment to estimate farmers’ willingness-to-pay (WTP) for faecal sludge and municipal solid waste-based (FSM) compost in Kampala, Uganda and considered three attributes—fortification, pelletization and certification. Our results reveal that farmers are willing to pay for FSM compost and place a higher value on a ‘certified’ compost product. They are willing to pay US $0.4 per kg above the current market price for a similar certified product, which is 67 times higher than the cost of providing the attribute. Farmers are willing to pay US $0.127 per kg for ‘pelletized’ FSM compost, which is lower (0.57 times) than the cost of providing the attribute. On the other hand, farmers require US $0.089 per kg as a compensation to use ‘fortified’ FSM compost. We suggest that future FSM compost businesses focus on a ‘certified and pelletized’ FSM product as this product type has the highest production cost–WTP differential and for which future businesses can capture the highest percentage of the consumer surplus. The demand for FSM compost indicates the benefits that can accrue to farmers, businesses and the environment from the recycling of organic waste for agriculture.
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