Your search found 33 records
(Location: IWMI HQ Call no: e-copy only Record No: H047457)
(817 KB)
2 Amerasinghe, Priyanie; Sonkamble, S.; Jampani, Mahesh; Wajihuddin, Md.; Lakshmanan, E.; Starkl, M.; Sarah, S.; Fahimuddin, Md.; Ahmed, S. 2015. Developing integrated management plans for natural treatment systems in urbanised areas: case studies from Hyderabad and Chennai. In Wintgens. T.; Nattorp, A.; Elango, L.; Asolekar, S. R. (Eds.). Natural water treatment systems for safe and sustainable water supply in the Indian context: Saph Pani, London, UK: IWA Publishing. pp. 251-264.
(Location: IWMI HQ Call no: e-copy only Record No: H047551)
(1.9 MB)
(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.
(Location: IWMI HQ Call no: e-copy only Record No: H047742)
(1.29 MB)
Water scarcity is a reality, with a recent UN report estimating that about half of the global population could be facing water shortages by 2030. This has focused attention on existing sources and what could be done to maximize potential. Water reuse, in particular direct potable reuse (DPR), has enjoyed a somewhat turbulent history globally. Despite this, the City of Windhoek has been practising DPR for more than 45 years, and this commentary presents globally accepted barriers standing in the way of DPR and attempts to explore ways to overcome these given the experience in Windhoek.
(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.
6 Bharati, Luna; Sharma, Bharat R.; Smakhtin, Vladimir. (Eds.) 2016. The Ganges River Basin: status and challenges in water, environment and livelihoods. Oxon, UK: Routledge - Earthscan. 327p. (Earthscan Series on Major River Basins of the World)
(Location: IWMI HQ Call no: IWMI Record No: H047808)
(0.41 MB)
7 Scott, C. A.; Crootof, A. B.; Thapa, B.; Shrestha, R. K. 2016. The water-energy-food nexus in the Ganges Basin: challenges and opportunities. In Bharati, Luna; Sharma, Bharat R.; Smakhtin, Vladimir (Eds.). The Ganges River Basin: status and challenges in water, environment and livelihoods. Oxon, UK: Routledge - Earthscan. pp.138-153. (Earthscan Series on Major River Basins of the World)
(Location: IWMI HQ Call no: IWMI Record No: H047842)
(Location: IWMI HQ Call no: e-copy only Record No: H047973)
(0.62 MB)
The water treatment plant at the Hingna industrial area receives raw water from Ambazari Lake and supplies drinking water to industrial area, after conventional treatment. The treated water was found to have a pungent odour and yellow colour, which in turn changed from a brown to black precipitate. The water becomes aesthetically unacceptable to consumers. It was observed that a blackish precipitate formation was due to the presence of iron and manganese in lake water, which was not completely removed during treatment. To remove iron and manganese from drinking water, treatment studies were carried out with chlorine and KMnO4 as oxidants. Alum and lime were added for coagulation and pH correction. Jar test studies revealed that treatment with potassium permanganate at pH 7.7–8.0 was effective in the removal of iron, manganese and organics, which were responsible for causing colour and odour to water. The studies helped in improvements in water quality for safe drinking water supply.
(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.
(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 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.
(Location: IWMI HQ Call no: e-copy only Record No: H048064)
(1.66 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H048096)
(0.47 MB) (480 KB)
The study was conducted on the status of the quality of water from the Owabi water treatment plant that supplies drinking water to Kumasi, a major city in Ghana, to ascertain the change in quality of water from source to point-of-use. Physico-chemical, bacteriological water quality parameters and trace metal concentration of water samples from five different treatment points from the Owabi water treatment plant were investigated. The raw water was moderately hard with high turbidity and colour that exceeds the WHO guideline limits. Nutrient concentrations were of the following order: NH3\NO2 -\- NO3 -\PO4 3-\SO4 2- and were all below WHO permissible level for drinking water in all the samples at different stages of treatment. Trace metal concentrations of the reservoir were all below WHO limit except chromium (0.06 mg/L) and copper (0.24 mg/L). The bacteriological study showed that the raw water had total coliform (1,766 cfu/100 mL) and faecal coliform (257 cfu/100 mL) that exceeded the WHO standard limits, rendering it unsafe for domestic purposes without treatment. Colour showed strong positive correlation with turbidity (r = 0.730), TSS (r C 0.922) and alkalinity (0.564) significant at p\0.01. The quality of the treated water indicates that colour, turbidity, Cr and Cu levels reduced and fall within the WHO permissible limit for drinking water. Treatment process at the water treatment plant is adjudged to be good.
(Location: IWMI HQ Call no: e-copy only Record No: H048126)
(0.34 MB) (348 KB)
The key approach to manage and prevent potential hazards arising from specific contaminants in water networks is to consider water as the main product delivered. This new concept, addressed as water-reuse risk assessment program (WRAP), has been further developed from hazard analysis of critical control points (HACCP) to illustrate the potential hazards which are the roots of hindering intra-facility water reuse strategies. For industrial sectors applying water reclamation and reuse schemes, it is paramount that the reclaimed water quality stays within the desired quality. The objective of WRAP is to establish a new methodology and knowledge, which will contribute to the sustainable development of industrial water management, and demonstrate its capabilities in identifying and addressing any potential hazards in the selected schemes adoption by the industries. A ‘what-if’ scenario was simulated using a refinery as a case study to show strategies on how to benefit reclaimed or reuse water based on reliable, applied and scientific research within the process integration area. In conclusion, the WRAP model will facilitate operators, consultants and decision makers to reuse water on a fit-for-use basis whilst avoiding contaminant accumulation in the overall system and production of sub-quality products from inadequate processes after several reuses.
(Location: IWMI HQ Call no: e-copy only Record No: H048440)
(1.29 MB)
Water pollution remains a challenging issue for the sustainable development of Kathmandu Valley despite several infrastructural, awareness-raising and policy measures. The paper assesses the sustainability of the surface water resources of Kathmandu valley by analyzing the water quality parameters such as Dissolved Oxygen (DO) and Biochemical Oxygen Demand (BOD). The case study of Bagmati River pollution is analyzed for current and future wastewater production and treatment scenario based on the two important indicators of aquatic health. The DO and BOD were simulated to assess river pollution along a 25 km stretch between Sundarijal and Chovar. Water Evaluation And Planning (WEAP) model was used to simulate the current (year 2014) and future (year 2020 and 2030) river water quality conditions. The results showed that the water quality of the Bagmati River is relatively better during monsoon season due to higher river flow in comparison to the dry season. A comparison of simulated DO and BOD values for 2020 and 2030 with 2014 values indicated that the water quality of the Bagmati River within Kathmandu Valley will not significantly improve as a result of the planned wastewater treatment plants requiring additional countermeasures. The study pointed out the inefficiencies of the current practice of discharging untreated sewage into the surface water and causing largely in the river water and unsuitability of river water of water from the Gaurighat to the Chovar area. It is recommended to integrate river water pollution management and maintain ecologically to achieve the healthy urban development.
15 Mateo-Sagasta, Javier; Qadir, M.; Drechsel, Pay; Hanjra, M. A. 2017. Aspectos economicos e institucionales en la reutilizacion de aguas y ejemplos en America Latina y el Caribe. In Spanish. [Economic and institutional aspects of water reuse and examples in Latin America and the Caribbean]. In Mateo-Sagasta, Javier (Ed.). Reutilizacion de aguas para agricultura en America Latina y el Caribe: estado, principios y necesidades. Santiago, Chile: FAO. pp.43-55.
(Location: IWMI HQ Call no: e-copy only Record No: H048426)
(0.88 MB) (8.55 MB)
16 Reddy, V. R. 2018. Techno-institutional models for managing water quality in rural areas: case studies from Andhra Pradesh, India. International Journal of Water Resources Development, 34(1):97-115. (Special issue: Politics and Policies for Water Resources Management in India). [doi: https://doi.org/10.1080/07900627.2016.1218755]
(Location: IWMI HQ Call no: e-copy only Record No: H048475)
(1.32 MB)
This article examines the rationale, technologies, economics and institutional modalities in water quality management operations to draw lessons for designing policies for sustainable service delivery at scale. While the rationale for providing potable drinking water at affordable prices is clear, their economic viability is weak given their present scale of operations. There is a need for institutional safeguards for selection of deserving villages and water quality monitoring. It is argued that public–private–community partnerships are economically viable and sustainable. Adopting appropriate technologies could help with addressing the water quality issues in a more comprehensive manner.
17 Drechsel, Pay; Hanjra, Munir A. (Eds.) 2018. Wastewater for agriculture, forestry and aquaculture - Section iv. In Otoo, Miriam; Drechsel, Pay (Eds.). Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan. pp.548-774.
(Location: IWMI HQ Call no: IWMI Record No: H048676)
(6.99 MB)
18 Drechsel, Pay; Hanjra, Munir A. 2018. Wastewater and biosolids for fruit trees (Tunisia) - Case Study. In Otoo, Miriam; Drechsel, Pay (Eds.). Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan. pp.569-583.
(Location: IWMI HQ Call no: IWMI Record No: H048678)
(1.37 MB)
19 Drechsel, Pay; Hanjra, Munir A. 2018. Suburban wastewater treatment designed for reuse and replication (Morocco) - Case Study. In Otoo, Miriam; Drechsel, Pay (Eds.). Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan. pp.584-594.
(Location: IWMI HQ Call no: IWMI Record No: H048679)
(0.98 MB)
20 Amoah, Philip; Muspratt, A.; Drechsel, Pay; Otoo, Miriam. 2018. A public-private partnership linking wastewater treatment and aquaculture (Ghana) - Case Study. In Otoo, Miriam; Drechsel, Pay (Eds.). Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan. pp.617-630.
(Location: IWMI HQ Call no: IWMI Record No: H048682)
(1.42 MB)
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