Resource and Energy management

• Sewage and waste as an energy source

• Anaerobic technology (co-digestion, biogas, hydrogen production)

• Nutrient recovery

• Hybrid systems

• Energy optimization

• Life Cycle Assessment

River Basin Management

• Entry modeling

• Water quality

• Pollutants

• Matter Transport and Reactions

• Development measures

Urban Water Management

• Citydrainage

• Stormwater management

• Urban waters

• Matter transport, -retention and transformation in catchments

• Modeling

• Process development

Adepted Technologies

• Decentralised systems

• Rainwater harvesting

• Customized Water Supply

• Customized Sanitation

• Wastewater reuse

• Anaerobic systems

• Biogas technology

• Biofilm systems

Process Technology within Wastewater, Water and Solid Waste Treatment

• Nutrient Recovery ( Phosphorus: Crystallisation Technology, MAP Precipitation; Nitrogen: Ion Ex-change using Zeolites)

• Enhanced Wastewater Treatment (Precipitation, Flocculation, Phase Separation, Chemical Oxidation Processes)

• Application of Sophisticated Measurement Tools (Zeta Potential, Particle Size Distribution (PSD) and Settling Velocity)

• Concept Development for Industrial Wastewater and Leachate Treatment

• Characterisation of Organic Substrates for their Suitability as External Carbon Sources and their Gas Production Potential within Co-Digestion

• Quantification of the Co-digestibility of Solid and Liquid Organic Wastes

• Sewage Sludge Treatment, Conditioning and Valuable Matter Recycling

• Optimisation of Wastewater Chemical’s Application

• Energy Optimisation

• System Analysis, Supervision and Consulting of Plant Operators, Industry and Water Authorities

Left: Pre-treatment of biowaste for co-digestion (screens to separate floating and light density matter out of the pulper); Right: Zeolites of different proveniences and different particle sizes for the ammonia exchange process)

Biofilm Technology

• Rotating Biological Contactors (RBC) for Municipal and Industrial Wastewater Treatment

• Suspended Carrier Media (MBBR) to increase the Capacity of Activated Sludge Systems and to Unload the Secondary Clarifiers

• Biofilm Characterisation (Biofilm Thickness, Oxygen Profiles, Activity Tests)

• Simulation of Biofilm Systems

Left: RBC plant for municipal wastewater treatment; Right: Suspended carriers with and without biofilm growth (Moving bed biofilm technology: Kaldnes carriers ® with a specific surface of 500m2/m3).

River Basin Management

• Application of Physical Based Models for the Description of Relevant Transport and Retention Pro-cesses

• Development of Conceptual Models for the Quantification of Emissions into Surface Waters

• Investigation of Transport and Retention Processes in Catchment and in Water Bodies

• Identification of Source of Anthropogenic Pollutants

• Data Collection, Analysis and Management

• Formulation of Efficient Mitigation Measures to Reduce Water Pollution on the Scale of River Basins

• Freshwater Ecology

Left: Scheme of river basin model refined by deterministic and/or physical approaches; Right: Exemplary presentation of the results of the specific copper emission in river basins of Baden-Wuerttemberg.

Storm Water Treatment / Storm Water Management

• Scientific Support and Examination of Large-Scale Plants Treating Storm Water Runoff

• Laboratory and Field Trials / Monitoring

• Establishing the Physical, Chemical and Microbiological Basis of Treatment Processes

• Development of New Tools for the Treatment of Storm Water

• Modelling of Storm Water Runoff and Quality

• Storm Water Reuse and Infiltration

• Support of Organisations and Authorities

Left: Components of soil filter system for secondary treatment of storm water: The interaction of filtration, sorption and microbiological turnover provides permanent high efficiency for dissolved and particulate pollutants;
Right: Components of a sedimentation tank with increased sedimentation efficiency: Lamella plates reducing surface load and improving flow conditions.

Process Technology within Decentralised Wastewater, Water and Solid Waste Treatment

• Anaerobic Treatment Systems and Biogas Production

• Operational Optimisation of Small Wastewater Treatment Plants (especially under discontinuous and seasonal loading conditions)

• Black, Yellow and Brown Water Treatment

• Degradability Investigations of Various Grey Water Components

• Wastewater Reuse

Left: Wastewater treatment and production in Morocco; Right: Site optimisation for decentralised wastewater treatment systems (settlement 1 and 2: decentralised solution; settlement 3: centralised treatment)

Concept Development and Site Optimisation

• Concept Development for Waste and Wastewater Treatment Systems in Developing Countries

• Site Optimisation

• Rainwater Treatment, Rainwater Harvesting and Infiltration

• Operator Models for Wastewater and Waste Management in Rural Areas

Left: Sanitation and waste management of a municipality in Indonesia; Right: Sketch of a waste and wastewater concept for nutrient and energetic reuse of waste constituents