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The document advocates for the use of thermal hydrolysis as a pre-treatment for anaerobic digestion in wastewater treatment works (WWTWs) to increase biogas production and reduce sludge mass. It highlights that South African municipalities spend over R300 million annually on sludge disposal and suggests that thermal hydrolysis can improve digester efficiency, reduce carbon footprints, and provide a payback period of 2-5 years. The factsheet also outlines various financing mechanisms, such as municipal budgets, grants, and energy performance contracts, to support the adoption of these energy efficiency and renewable energy technologies.

The document advocates for decentralized wastewater treatment in South Africa to address infrastructure deterioration and high costs associated with centralized systems. It identifies key benefits such as non-potable water reuse and sludge beneficiation for energy and fertilizer, while noting a R33bn annual funding shortfall in the water and sanitation sector. Regulatory drivers include a national target to divert 75% of organic waste from landfills by 2030 and a liquid waste to landfill ban by 2027.

The Hartenbos wastewater treatment works (WWTW) in the Western Cape has implemented a hybrid microgrid consisting of solar PV and battery energy storage (BESS) to ensure operational continuity during loadshedding. The system, completed in September 2025 with a cost between R100 million and R112 million, allows the facility to island from the grid, reduce diesel reliance, and export surplus power. The project serves as a model for other municipalities to stabilize critical services and lower energy expenditures through embedded renewable energy.

This Request for Proposal (RFP No. SIDAFF 01/2026), issued by the GreenCape Sector Development Agency on 24 June 2026, seeks a service provider to conduct a 7-day sampling, testing, and analysis campaign at the Vredenburg Wastewater Treatment Works (WWTW) in the Saldanha Bay Local Municipality. The data collected will inform the design of proposed upgrades to the facility. The project is part of the Sustainable Infrastructure Development and Financial Facility (SIDAFF) Programme, an initiative of the Western Cape Government supported by international donors including the Swiss State Secretariat for Economic Affairs (SECO) and Impact Fund Denmark (IFD).

The document serves as a reference sheet for groundwater application processes, listing key contacts at the City of Cape Town (CoCT), the Department of Environmental Affairs and Development Planning (DEA&DP), and the Department of Water and Sanitation (DWS). It also catalogues official guidelines, bylaws, and presentations related to the National Water Act and water use licenses.

The document analyzes the alignment of water services by-laws in Western Cape municipalities with the 2005 Department of Water Affairs and Forestry (DWAF) model by-law. It identifies gaps in regulatory clarity, highlights specific business risks such as industrial effluent permits and water audits, and notes that municipalities with more recent updates generally provide better certainty for investors and operators.

The document presents a data-driven overview of Cape Town's green sectors, highlighting a total of 600 assessed companies. It breaks down the energy, water, and waste industries by company size and function, while detailing municipal budget figures and investments in green infrastructure, including the Atlantis Special Economic Zone for Green Technologies.

The document identifies the secondary treatment stage as the highest energy consumer in wastewater treatment works, particularly in systems using activated sludge where aeration can account for 50% of process energy. It recommends benchmarking specific power consumption (SPC) and implementing interventions such as fine bubble aeration, dissolved oxygen control, and cascade aeration to reduce costs and greenhouse gas emissions. Financing options for these projects include municipal budgets, grants, concessional loans, and energy performance contracts.

The study evaluates three methods for managing phosphate at the Cape Flats WWTW: high-grade struvite production, low-grade struvite production, and chemical precipitation. While chemical precipitation has the lowest initial capital expenditure, low-grade struvite production is identified as the most economically and ecologically sustainable option over a 20-year period, with a net present cost of R25.4 million compared to R51.2 million for chemical precipitation and R76.2 million for high-grade struvite. Despite these relative advantages, the study finds that struvite production is currently unprofitable due to low local market prices for phosphate fertilizers and high capital costs, suggesting a need for new policies that treat phosphate as a resource rather than a pollutant.

The policy brief highlights the risks of nitrogen mismanagement in Latin America, where excess fertilizer use and poor wastewater treatment threaten ecosystems and food security. It advocates for the creation of specific policy frameworks and management tools, such as threshold levels for nutrient application, to prevent soil degradation and water pollution. The brief also notes that without improved wastewater treatment, coastal nitrogen levels in South America could triple by 2050.

The document outlines multiple IAI-funded research projects focusing on environmental and social vulnerabilities in the Americas. Key initiatives include the study of nitrogen cycling and wastewater treatment in Latin America, the conservation of tropical dry forests, the provision of climate services for agriculture in southeastern South America, and the assessment of freshwater ecosystem risks. Other projects examine the link between land use and malaria in the Amazon, water security in arid regions, the role of phytoplankton in carbon sequestration, the impact of transcontinental highways on zoonotic disease risk in Peru, and urban hydrological vulnerability in Mexico City.

The policy brief highlights the risks of improper nitrogen use in Latin American agriculture and wastewater management, advocating for evidence-based policies to prevent soil degradation and water contamination. It details a research project by the Inter-American Institute for Global Change Research (IAI) and the National Institute for Space Research (INPE) to monitor nitrogen cycles and develop management tools across several American countries.

Floating Treatment Wetlands (FTWs) are artificial platforms that enable aquatic plants to grow in deep water, utilizing a combination of plant uptake and microbial biofilms to remove pollutants. Research by the International Institute for Sustainable Development (IISD) demonstrates that FTWs can significantly reduce phosphorus levels, remove certain pharmaceuticals and herbicides, and potentially mitigate oil spills. The system is applicable to various freshwater environments, including lakes, stormwater ponds, and wastewater lagoons.

The IISD Experimental Lakes Area (IISD-ELA) responds to Ontario's Environment Plan by urging the government to integrate more rigorous scientific evidence, expanded monitoring, and new technologies into its freshwater protection strategies. Key recommendations include extending air pollutant monitoring to water bodies, researching the impacts of salinity and plastics, setting a specific 18.4 per cent phosphorus reduction target for Lake of the Woods, and utilizing the Internet of Things for real-time sewage flow monitoring.

The document evaluates four scenarios for restoring Beira Lake: business-as-usual, wastewater treatment upgrades, dredging, and a combined approach. Using the SAVi tool, it analyzes the impact of these interventions on water clarity, property values, and recreational spending between 2020 and 2025. While the combined approach (Scenario 4) generates the highest total benefits, wastewater treatment upgrades (Scenario 2) offer the highest benefit-to-cost ratio.

The report examines the Lephalale Local Municipality's struggle to provide basic services and guide urban development amidst a population boom triggered by the Medupi power station. It highlights how the municipality's lack of land ownership and technical skills forces a dependency on private entities and higher levels of government, hindering its vision of becoming a vibrant city and energy hub.

The report examines the water crisis in North Cyprus, driven by climate change and poor management, and evaluates the 'Project of the Century'—a pipeline transporting water from Turkey's Toros Mountains to North Cyprus. It highlights the risks of over-reliance on Turkey, the failure of current decentralized water management, and the lack of coordination between the island's divided administrations. The authors recommend transitioning to a centralized, transparent governance model based on OECD principles, diversifying water sources through renewable-energy-powered desalination, and fostering bi-communal cooperation to ensure long-term environmental sustainability.

The report examines the impact of the Turkey-North Cyprus water pipeline, an innovative project pumping water from the Taurus Mountains to North Cyprus, within the context of increasing water scarcity in the Eastern Mediterranean. It highlights a systemic failure in water governance in North Cyprus, characterized by short-term political tactics, lack of coordination, and unsustainable groundwater extraction leading to salinisation. While the pipeline provides a significant new resource, the authors argue that without comprehensive reform—including the creation of an independent regulatory board, better data collection, and bi-communal cooperation—the project may not ensure long-term climate resilience. The report suggests adopting OECD principles of water governance to improve effectiveness, efficiency, and trust.

The author posits that a new industrial revolution is emerging, driven by the need to use nature more productively. By applying 'natural capitalism'—which values nature and people—and integrative design, developers can create high-performance, low-impact human settlements that are more profitable and desirable than traditional developments. Examples such as Village Homes in California and the city of Curitiba, Brazil, demonstrate that reducing resource depletion and pollution can lead to superior financial and social outcomes, including lower crime and higher market value.

The text examines the crisis of freshwater depletion and proposes 'natural capitalism' through water efficiency. It details technological and behavioral shifts in agriculture (drip irrigation), landscaping (xeriscaping), and building systems (waterless toilets, graywater recovery), while advocating for decentralized biological wastewater treatment like 'Living Machines'.