Nearly 50% of electricity-related emissions from the global wastewater sector could be abated at negative cost by investing in readily available technologies This report investigates greenhouse gas abatement opportunities from energy efficiency in the wastewater sector.
IWA Search Theme: Wastewater Systems
Nature Based Solutions for Wastewater Treatment
This book serves as a compilation of technical references, case examples and guidance for applying nature-based solutions for treatment of domestic wastewater, and enables a wide variety of stakeholders to understand the design parameters, removal efficiencies, costs, co-benefits for both people and nature and trade-offs for consideration in their local context. Examples through case studies are from across the globe and provide practical insights into the variety of potentially applicable solutions.
Resilient Strategies Guide for Water Utilities
The Resilient Strategies Guide for Water Utilities provides options for drinking water, wastewater and stormwater utilities to assist them in developing plans that contain strategies that address their specific needs and priorities.
Algae biomass cultivation in nitrogen rich biogas digestate
Lake water algae as an effective treatment method for liquid waste streams with high ammonium concentrations.
Pretreatment of brewery effluent to cultivate Spirulina sp. for nutrients removal and biomass production
Pretreatment procedure for the sustainable utilization of brewery effluent and production of algal biomass with valuable nutrients.
Sewer sludge cleaning and subsequent sludge sediments recycling reuse: A case study in PR China
The treatment and disposal of sludge sediments come from sewer cleaning process is the key for carbon neutrality of the whole system. This means that the sludge sediments should be recycled and beneficial reused rather than directly incineration, landfill or even laissez-faire. nevertheless, besides the environmental impacts of carbon footprint mitigation, relevant co-conflicting issues may include engineering cost, public perception, socio-economic, rules/regulations, and managerial aspects of cleaning process. They all receive excessive consideration from government authorities and stakeholders.
Calculator Tool for Determining Greenhouse Gas Emissions for Biosolids Processing and End Use
A greenhouse gas (GHG) calculator tool (Biosolids Emissions Assessment Model, BEAM) was developed for the Canadian Council of Ministers of the Environment to allow municipalities to estimate GHG emissions from biosolids management. The tool was developed using data from peer-reviewed literature and municipalities. GHG emissions from biosolids processing through ﬁnal end use/disposal were modeled. Emissions from nine existing programs in Canada were estimated using the model. The program that involved dewatering followed by combustion resulted in the highest GHG emissions (Mg CO2e 100 Mg-1 biosolids (dry wt.). The programs that had digestion followed by land application resulted in the lowest emissions (-26 and -23 Mg CO2 e100 Mg-1 biosolids (drywt.). Transportation had relatively minor effects on overall emissions. The greatest areas of uncertainty in the model include N2O emissions from land application and biosolids processing. The model suggests that targeted use of biosolids and optimizing processes to avoid CH4 and N2O emissions can result in signiﬁcant GHG savings.
East Asia and Pacific Wastewater to Energy Processes: a Technical Note for Utility Managers in EAP countries
The objective of this technical note is to inform utility managers and technical decision makers in East Asian countries about appropriate technologies available for wastewater treatment with energy recovery processes.
Methane emission during municipal wastewater treatment
Study focused on amount of methane that is emitted from a plant, but also of the possible sources and sinks of methane on the plant. In this study, the methane emission from a full- scale municipal wastewater facility with sludge digestion was evaluated during one year.
POLICY GUIDANCE MANUAL ON WASTEWATER MANAGEMENT – WITH A SPECIAL EMPHASIS ON DECENTRALIZED WASTEWATER TREATMENT SYSTEMS
This manual provides a step-by-step guide on development and implementation DEWATS in developing countries of the region with a set of financial schemes, market opportunities, investment and potential impacts.