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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 concentration of waste components. Recognising the need for an extensive evaluation of respirometry in control of the activated sludge process, IWA published Scientific and Technical Report (STR7): Respirometry in Control of the Activated Sludge Process: Principles, which included the biological background, measuring principles, measured and deduced variables, an introduction to control system principles and an overview of proposed and applied control strategies.
To complete the work, a second STR: Respirometry in Control of the Activated Sludge Process: Benchmarking Control Strategies was commissioned and, through the generous support of 14 corporate sponsors, a well-defined project was set up with the aim to accomplish an ambitious mission: the development of a simulation protocol (known as the "IWA Simulation Benchmark") and the unbiased evaluation of many respirometry-based control strategies.
This Report includes a complete description of the simulation protocol including model plants, simulation procedures and evaluation criteria. Also included in this STR is an overview of the strategy evaluations and a look into the future of respirometry as the basis for control. Finally, to ease the transition from paper to computer, and increase the application of the IWA Simulation Benchmark, a CD is included with many benchmark files and control strategy layouts generated using a variety of simulation platforms including GPS-XTM, STOATTM and WESTTM.
This Report will be an invaluable source of information for practitioners and consultants dealing with the operation and control of activated sludge processes, developers of control systems, control software and simulation software, and manufacturers of respirometers and other environmental instruments in all industries dealing with toxic wastes.
Scientific and Technical Report No. 11
Also available: Respiromentry in Control of the Activated Sludge Process: Principles
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...
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...
Activated Sludge Separation Problems
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...
Mathematical Modeling of Biofilms
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Membrane Technology: Pilot Studies of Membrane-Aerated Bioreactors
This research investigates the use of submerged gas-permeable membranes for the delivery of oxygen to municipal wastewater. This approach is likely offer significant advantages over the...
Resource Recovery from Wastewater: A Research Agenda for Australia
With increasing energy costs, more stringent environmental discharge limits and greater implementation of water sensitive urban design the economic viability of recovering water, energy and...
Optimizing Biotreatment: Integrated Process Models and Control Strategies
The overall objective of this research project is to develop and implement model-based control strategies for improving biological treatment and document the methodology, benefits, and effort...
Water Reuse: Understanding Public Perception and Participation
Non-potable and potable (principally in-direct potable) water reuse initiatives in the United States have faced increasing public opposition. Several high-profile initiatives have been halted...