Water Stewardship

Achieving true wholesome sustainability requires a change of heart. Hence this book starts in the heart. It asks the timely question of ‘how do we become true water stewards?’ The transformation to a new sustainable practice will be made through a new connection with our heart, a more holistic type of analysis (brains) and the right actions based on personal integrity (hand). A water steward should be similar to the shepherds of olden days. They were given the responsibility to guard the sheep. The village trusted they would take care of the herd, make sure it would be well fed, protected from storms and kept together. The shepherd learned to take a long term perspective for the herd, ensuring that the pastures were not overgrazed, that the herd was not led too far away from access to water and that shelter was in reach in the event of storms and dangerous predators. Over time the shepherds became increasingly skilled in caring for the herd. They integrated the responsibility of the well-being of the herd into their identity. In a similar way, we can take the responsibility for human water consumption and our interaction with the natural world. We need to understand and work according to the big picture and the very long term perspective. Being a water steward requires deep reflection of how water should be treated and our relationship with water. Water utility professionals have the knowledge and have been trusted with the role of managing human water consumption. This is a great responsibility and requires deep reflection of how this should be done. The book will present ideas and concepts for the new role as well as questions for personal reflection

Water Stewardship

Achieving true wholesome sustainability requires a change of heart. Hence this book starts in the heart. It asks the timely question of ‘how do we become true water stewards?’ The transformation to a new sustainable practice will be made through a new connection with our heart, a more holistic type of analysis (brains) and the right actions based on personal integrity (hand). A water steward should be similar to the shepherds of olden days. They were given the responsibility to guard the sheep. The village trusted they would take care of the herd, make sure it would be well fed, protected from storms and kept together. The shepherd learned to take a long term perspective for the herd, ensuring that the pastures were not overgrazed, that the herd was not led too far away from access to water and that shelter was in reach in the event of storms and dangerous predators. Over time the shepherds became increasingly skilled in caring for the herd. They integrated the responsibility of the well-being of the herd into their identity. In a similar way, we can take the responsibility for human water consumption and our interaction with the natural world. We need to understand and work according to the big picture and the very long term perspective. Being a water steward requires deep reflection of how water should be treated and our relationship with water. Water utility professionals have the knowledge and have been trusted with the role of managing human water consumption. This is a great responsibility and requires deep reflection of how this should be done. The book will present ideas and concepts for the new role as well as questions for personal reflection

Realising full-scale control in wastewater treatment systems using in situ nutrient sensors

Abstract A major change in paradigm is taking place in the operation of wastewater treatment plants as automatic process control is becoming feasible. This change is due to a number of different reasons, not least the development of online nutrient sensors, which measure the key parameters in the biological nutrient removal processes, i.e. ammonium, nitrate and phosphate. The thesis is about realising full-scale control in wastewater treatment systems using in situ nutrient sensors. The main conclusion of the work is that it is possible to significantly improve the operational performance in full-scale plants by means of relatively simple control structures and controllers based on in situ nutrient sensors. The in situ location should be emphasised as this results in short dead time, hence making simple feedback loops based on proportional and integral actions effective means to control the processes. This conclusion has been reached based on full-scale experiments, where various controllers and control structures for the biological removal of nitrogen and the chemical removal of phosphorous have been tested. The full-scale experiments have shown that it is possible to provide significant savings in energy consumption and precipitation chemicals consumption, reduction in sludge production and improvement of the effluent water quality. The conclusions are supported by model simulations using the COST benchmark simulation platform. The simulations are used for investigating issues regarding the interactions between the main control handles working in the medium time frame (relative gain array analysis). The simulations have also been used for testing various control structures and controllers. Controllers for the following types of control are suggested and tested: „h Control of aeration to obtain a certain effluent ammonium concentration; „h Control of internal recirculation flow rate to obtain maximum inorganic nitrogen removal; „h Control of external carbon dosage together with internal recirculation flow rate to obtain a certain effluent total inorganic nitrogen concentration; „h Optimisation of the choice of sludge age. Additionally, a procedure for implementing new control structures based on nutrient sensor has been proposed. The procedure involves an initial analysis phase, a monitoring phase, an experimenting phase and an automatic process control phase. An international survey with the aim to investigate the correspondence between ICA (instrumentation, control and automation) utilisation and plant performance has been carried out. The survey also gives insight into the current state of ICA applications at wastewater treatment plants

Smart Water Utilities

Today there is increasing pressure on the water infrastructure and although unsustainable water extraction and wastewater handling can continue for a while, at some point water needs to be managed in a way that is sustainable in the long-term. We need to handle water utilities “smarter”. New and effective tools and technologies are becoming available at an affordable cost and these technologies are steadily changing water infrastructure options. The quality and robustness of sensors are increasing rapidly and their reliability makes the automatic handling of critical processes viable. Online and real-time control means safer and more effective operation. The combination of better sensors and new water treatment technologies is a strong enabler for decentralised and diversified water treatment. Plants can be run with a minimum of personnel attendance. In the future, thousands of sensors in the water utility cycle will handle all the complexity in an effective way. Smart Water Utilities: Complexity Made Simple provides a framework for Smart Water Utilities based on an M-A-D (Measurement-Analysis-Decision). This enables the organisation and implementation of “Smart” in a water utility by providing an overview of supporting technologies and methods. The book presents an introduction to methods and tools, providing a perspective of what can and could be achieved. It provides a toolbox for all water challenges and is essential reading for the Water Utility Manager, Engineer and Director and for Consultants, Designers and Researchers

Smart Water Utilities

Today there is increasing pressure on the water infrastructure and although unsustainable water extraction and wastewater handling can continue for a while, at some point water needs to be managed in a way that is sustainable in the long-term. We need to handle water utilities “smarter”. New and effective tools and technologies are becoming available at an affordable cost and these technologies are steadily changing water infrastructure options. The quality and robustness of sensors are increasing rapidly and their reliability makes the automatic handling of critical processes viable. Online and real-time control means safer and more effective operation. The combination of better sensors and new water treatment technologies is a strong enabler for decentralised and diversified water treatment. Plants can be run with a minimum of personnel attendance. In the future, thousands of sensors in the water utility cycle will handle all the complexity in an effective way. Smart Water Utilities: Complexity Made Simple provides a framework for Smart Water Utilities based on an M-A-D (Measurement-Analysis-Decision). This enables the organisation and implementation of “Smart” in a water utility by providing an overview of supporting technologies and methods. The book presents an introduction to methods and tools, providing a perspective of what can and could be achieved. It provides a toolbox for all water challenges and is essential reading for the Water Utility Manager, Engineer and Director and for Consultants, Designers and Researchers