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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
Sequencing Batch Reactor Technology
The report highlights various types of SBRs, design considerations and procedures, equipment required, and experiences gained from practical applications. This report will help both designers and...
Activated Sludge Models
This book has been produced to give a total overview of the Activated Sludge Model (ASM) family at the start of 2000 and to give the reader easy access to the different models in...
Solids in Sewers
This Report presents information on the current state of knowledge of the origins, occurrence, nature and effects of sewer solids for use by engineers, scientists, administrators and water quality...
Microbial Community Analysis
Microbial Community Analysis surveys the vast amount of theoretical and practical knowledge on the design of biological treatment systems. It describes the different types of biological wastewater...
Sludge Thermal Hydrolysis: Application and Potential
Thermal hydrolysis is revolutionizing wastewater treatment. Current treatment methods have evolved little since pioneering work in the late 19th and early 20th centuries. Subsequently, most...
Environmental technologies for the sustainable development of the water and energy sectors
Did you know that watching your favourite series on tv or just switching on your laptop for work, requires indirect water consumption? It’s a proven fact that every time we use energy resources,...
Can TMDL Models Reproduce the Nutrient Loading-Hypoxia Relationship?
Anthropogenic nutrient enrichment of estuaries is a problem dramatically transforming coastal ecosystems worldwide (Diaz and Rosenberg 2008). Despite significant public and private sector...
Uncertainty in Wastewater Treatment Design and Operation
Scientific and Technical Report No. 21
Uncertainty in Wastewater Treatment Design and Operation aims to facilitate the transition of the wastewater...