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The Activated Sludge (AS) Process is old technology but is still widely adopted worldwide for its convenience and simplicity: an impressive number (many hundred of thousands) of this kind of system are in operation.
Occasionally, problems such as bulking and foaming occur, causing regulation violations and large investment is often required immediately to control them. For this reason, an intense research effort has been made during the last few decades to face these problems, and this report details the work undertaken by the IWA Specialist Group on Activated Sludge Population Dynamics.
This Scientific and Technical Report describes the main reasons fslyuor the growth of the different filamentous microorganisms in activated sludge, and the biological molecular tools available today for the identification of the main biomass components. The wide range of experiences around the world is documented and the methods to avoid the proliferation of these organisms are presented and critically reviewed.
Activated Sludge Separation Problems consists of seven chapters, presenting up-to-date technical and scientific aspects of these processes.
Scientific and Technical Report No. 16
Dealing with the Complex Interrelation of Intermittent Supply and Water Losses
The book provides a scientific approach into appraising Intermittent Water Supply (IWS) on a global scale through the analysis of available information and data based on a structured methodology...
River Water Quality Model No.1
This Scientific and Technical Report (STR) presents the findings of the IWA Task Group on River Water Quality Modelling (RWQM) in a critical evaluation of the current state of the practice in...
Respirometry in Control of the Activated Sludge Process: Benchmarking Control Strategies
The respiration rate of activated sludge has generated much interest, because it is an essential variable in the activated sludge process and provides information on biomass activity and...
Mechanism and Design of Sequencing Batch Reactors for Nutrient Removal
The sequencing batch reactor (SBR) is perhaps the most promising and viable of the proposed activated sludge modifications today for the removal of organic carbon and nutrients. In a relatively...
Innovation in Dewatering Sludges
This report will only be available as a Pay-Per-View item.
Dewatering practices reduce the water content of sludges in order to minimise the volume to be handled and improve handling...
Assessment of Technology Advancements for Future Energy Reduction
The wastewater industry is continuously seeking new technologies that will reduce the need for purchased energy and improve its ability to beneficially recover resources. In addition, within...
Risks from Ebola Discharge from Hospitals to Sewer Workers
Current World Health Organization and Centers for Disease Control and Prevention guidance for the disposal of liquid waste from patients undergoing treatment for Ebola virus disease at hospitals...
Fundamentals of Wastewater Treatment and Engineering