A5063011238- Wastewater Treatment and Reuse
- Constructed Wetlands for Wastewater Treatment
- Wastewater Treatment and Nitrogen Removal
- Water-Energy-Food Nexus Studies
- Water resources management and optimization
- Urban Stormwater Management Solutions
- Phosphorus and nutrient management
- Child Nutrition and Water Access
- Membrane Separation Technologies
- Building Energy and Comfort Optimization
- Environmental Science and Technology
- Water Treatment and Disinfection
- Water Systems and Optimization
- Smart Grid Energy Management
- Water Governance and Infrastructure
- Economic and Environmental Valuation
- Environmental Science and Water Management
- Environmental Education and Sustainability
- Hydrology and Watershed Management Studies
- Physics and Engineering Research Articles
- Clinical Nutrition and Gastroenterology
- Renewable Energy and Sustainability
- Ammonia Synthesis and Nitrogen Reduction
- Soil and Water Nutrient Dynamics
- Microbial Fuel Cells and Bioremediation
Swiss Federal Institute of Aquatic Science and Technology
2012-2025
Environmental Protection Agency
2004
TU Dresden
2000
École Polytechnique Fédérale de Lausanne
1995-1999
Technical University of Denmark
1994
The analysis of different removal and recovery techniques for nutrients in urine shows that many cases is energetically more efficient than new-production from natural resources. Considering only the running electricity fossil energy requirements traditional way wastewater treatment fertiliser production, following specific can be calculated: 45 MJ kg(-1)N denitrification a WWTP, 49 kg(-1)p P-precipitation N-fertiliser 29 P-fertiliser production. These numbers are higher values derived...
ADVERTISEMENT RETURN TO ISSUEPREVFeatureNEXTSource Separation: Will We See a Paradigm Shift in Wastewater Handling?1The example of urine reveals the large potential source separation technologies for sustainable and resource efficient future urban wastewater management.Tove A. Larsen*, Alfredo C. Alder, Rik I. L. Eggen, Max Maurer, Judit LienertView Author Information Eawag, Swiss Federal Institute Aquatic Science Technology, Dübendorf1Editor's Note: To our delight at ES&T, we have started...
The need for better nutrient management has spurred efforts towards more comprehensive recycling of nutrients contained in human excreta to agriculture. Research this direction intensified throughout the past years, continuously unfolding new knowledge and technologies. present review aspires provide a systematic synthesis field by providing an accessible overview terminology, recovery pathways treatment options, products rendered treatment. Our suggests that, rather than focusing on...
Anthropogenic Nutrient Solution (ANS, Urine) adds about 75% of the nitrogen and 50% phosphorus to domestic wastewater. It is proposed collect ANS at source release it sequentially, so that arrives all same time treatment plant where could be treated separately. The system would have many advantages relative conventional technology. A stepwise transition from technology slowly improve performance.
Urine separation is a promising alternative to present-day waste water management. It can help manage our nutrient flows in sustainable way. Currently, techniques are being developed recycle and treat source-separated urine. These techniques, however, must consider the spontaneous processes that change separated The initial cause of changes contamination with microorganisms, which hardly be avoided urine-collecting systems. most important transformation microbial urea hydrolysis, mineral...
Anthropogenic Nutrient Solution (ANS, Urine) adds about 75% of the nitrogen and 50% phosphorus to domestic wastewater. It is proposed collect ANS at source release it sequentially, so that arrives all same time treatment plant where could be treated separately. The system would have many advantages relative conventional technology. A stepwise transition from technology slowly improve performance.
In this study, we investigated the prevention of enzymatic urea hydrolysis in fresh urine by increasing pH with calcium hydroxide (Ca(OH)2) powder. The amount Ca(OH)2 dissolving depends significantly on composition urine. different compositions used our simulations showed that between 4.3 and 5.8 g dissolved 1 L at 25 °C. At temperature, saturation is 12.5 far above 11, which identified as upper limit for hydrolysis. However, temperature has a strong effect pH, higher values being achieved...
Recent developments in high- and middle-income countries have exhibited a shift from conventional urban water systems to alternative solutions that are more diverse source separation, decentralization, modularization. These include nongrid, small-grid, hybrid address such pressing global challenges as climate change, eutrophication, rapid urbanization. They close loops, recover valuable resources, adapt quickly changing boundary conditions population size. Moving requires both technical...
Green roofs have the potential to offer numerous ecosystem services; however, they are rarely designed achieve them. Instead, design is restricted by perceived structural and maintenance constraints, which consequently diminish achievable benefits. For green improve sustainability resilience of cities, their should match promised multi-functional application using performance-based design. The first step towards a comprehensive performance model synthesize recommendations across disciplines...
Urban Water Management involves the fields of water supply, urban drainage, wastewater treatment and sludge handling. On basis Agenda 21, principles guidelines for sustainable management are discussed. Sustainable technology leads to acceptable gradients in state variables. New technologies departing from an analysis required services rather than stepwise improvement existing is preferred. An efficient use resources will lead a minimal increase entropy require active reactive approach. The...
The rate‐limited sorption and nonequilibrium transport of several hydrophobic organic chemicals in three low‐organic carbon (<0.025%) aquifer materials was investigated. Results miscible displacement experiments performed at two pore water velocities with very low solution‐phase concentrations (30–60 μg L −1 ) were analyzed using a first‐order mass transfer model, as well model employing the local equilibrium assumption. analyses revealed to be significantly rate limited, possibly by...
In laboratory experiments, source-separated urine was stabilised with nitrification and denitrified via nitritation anaerobic ammonium oxidation. The highest total ammonia concentration in the influent 7,300 gN/m3, maximum pH 9.2. a moving bed biofilm reactor (MBBR) Kaldnes® carriers, we as 1:1 nitrate solution. rate 380 gN/m3/d corresponding to 1.7 gN/m2biofilm/d. Nitrite solutions were produced continuous flow stirred tank (CSTR) 4.8 days sludge retention time (SRT) at 30°C sequencing...
Precipitation in urine-separating toilets (NoMix toilets), waterless urinals, and conventional urinals causes severe maintenance problems. Additionally, the partial fixation of nutrients precipitates may affect later use treatment source-separated urine. The goal this study was to characterise mineral composition identify main for precipitation. X-ray diffraction analysis showed that crystalline compounds are struvite, hydroxyapatite, calcite. We measured concentrations solutions traps urine...
Urban Water Management involves the fields of water supply, urban drainage, wastewater treatment and sludge handling. On basis Agenda 21, principles guidelines for sustainable management are discussed. Sustainable technology leads to acceptable gradients in state variables. New technologies departing from an analysis required services rather than stepwise improvement existing is preferred. An efficient use resources will lead a minimal increase entropy require active reactive approach. The...