Costel Bumbac is a senior research scientist leading the biotechnology research team within the Environmental Technology and Technology Transfer Department of ECOIND, Romania. He has 15 years of experience in research projects focused on developing and optimisation of biological wastewater/drinking water treatment technologies, biodegradability studies, soil bioremediation and waste to biofuels technologies. Within the INNOQUA project, he contributed to the development of bio-solar purification system and full-scale demonstration and served as worldwide demonstration manager.Jean-Baptiste Dussaussois was the project manager of INNOQUA. As an environment and water engineer he brought his expertise and experiences from an NGO and large company to develop nature-based wastewater treatment solutions. He has managed several international projects and is currently working with NOBATEK/INEF4, a private Research and Technology Organisation for the sustainable building sector. He has been part of several European Commission expert groups and is a member of the water parliament of the South-West of France.David Tompkins is an environmental scientist with a multi-disciplinary background encompassing horticulture, soil science, composting, anaerobic digestion, wastewater treatment, market development and policy implementation. David is a technical consultant and senior manager for Aqua Enviro, specialising in various aspects of sewage sludges, biowastes and other bioresources: hazard management, valorisation, market development, end of waste and stakeholder engagement.

The INNOQUA project and book are so timely. Demonstrated at numerous locations worldwide, INNOQUA convincingly innovates the structure and process engineering of wastewater treatment in terms of 'Nature Based Solutions' - an eye opener! Congratulations and thanks to all members of the project team - one of whom sadly passed away just before this publication. It is with gratitude that we remember our academic advisor and friend Prof. Chris Buckley from the WASH R&D Centre at the University of KwaZulu Natal. His commitment to the INNOQUA project was invaluable. The time for wastewater innovation is now - INNOQUA shows us a way.

• ForewordChapter 1. Introduction to the INNOQUA projectChapter 2. Drivers and Barriers towards a Sustainability Transition in the Wastewater Sector – A NEXUS perspective with nature-based solutionsChapter 3. Why choose nature-based wastewater treatment systems?Chapter 4. Nature-based wastewater treatment – overview & current common systems in the Global SouthChapter 5. Primary and secondary treatment: VermifiltrationChapter 6. Daphniafilter: a nature-based tertiary treatmentChapter 7. Tertiary treatment: microalgae-based wastewater treatmentChapter 8. Disinfection options for decentralised wastewater treatmentChapter 9. INNOQUA – commercialisation opportunitiesAfterword

Costel Bumbac is a senior research scientist leading the biotechnology research team within the Environmental Technology and Technology Transfer Department of ECOIND, Romania. He has 15 years of experience in research projects focused on developing and optimisation of biological wastewater/drinking water treatment technologies, biodegradability studies, soil bioremediation and waste to biofuels technologies. Within the INNOQUA project, he contributed to the development of bio-solar purification system and full-scale demonstration and served as worldwide demonstration manager.Jean-Baptiste Dussaussois was the project manager of INNOQUA. As an environment and water engineer he brought his expertise and experiences from an NGO and large company to develop nature-based wastewater treatment solutions. He has managed several international projects and is currently working with NOBATEK/INEF4, a private Research and Technology Organisation for the sustainable building sector. He has been part of several European Commission expert groups and is a member of the water parliament of the South-West of France.David Tompkins is an environmental scientist with a multi-disciplinary background encompassing horticulture, soil science, composting, anaerobic digestion, wastewater treatment, market development and policy implementation. David is a technical consultant and senior manager for Aqua Enviro, specialising in various aspects of sewage sludges, biowastes and other bioresources: hazard management, valorisation, market development, end of waste and stakeholder engagement.

The INNOQUA project and book are so timely. Demonstrated at numerous locations worldwide, INNOQUA convincingly innovates the structure and process engineering of wastewater treatment in terms of 'Nature Based Solutions' - an eye opener! Congratulations and thanks to all members of the project team - one of whom sadly passed away just before this publication. It is with gratitude that we remember our academic advisor and friend Prof. Chris Buckley from the WASH R&D Centre at the University of KwaZulu Natal. His commitment to the INNOQUA project was invaluable. The time for wastewater innovation is now - INNOQUA shows us a way.

• ForewordChapter 1. Introduction to the INNOQUA projectChapter 2. Drivers and Barriers towards a Sustainability Transition in the Wastewater Sector – A NEXUS perspective with nature-based solutionsChapter 3. Why choose nature-based wastewater treatment systems?Chapter 4. Nature-based wastewater treatment – overview & current common systems in the Global SouthChapter 5. Primary and secondary treatment: VermifiltrationChapter 6. Daphniafilter: a nature-based tertiary treatmentChapter 7. Tertiary treatment: microalgae-based wastewater treatmentChapter 8. Disinfection options for decentralised wastewater treatmentChapter 9. INNOQUA – commercialisation opportunitiesAfterword

Costel Bumbac is a senior research scientist leading the biotechnology research team within the Environmental Technology and Technology Transfer Department of ECOIND, Romania. He has 15 years of experience in research projects focused on developing and optimisation of biological wastewater/drinking water treatment technologies, biodegradability studies, soil bioremediation and waste to biofuels technologies. Within the INNOQUA project, he contributed to the development of bio-solar purification system and full-scale demonstration and served as worldwide demonstration manager.Jean-Baptiste Dussaussois was the project manager of INNOQUA. As an environment and water engineer he brought his expertise and experiences from an NGO and large company to develop nature-based wastewater treatment solutions. He has managed several international projects and is currently working with NOBATEK/INEF4, a private Research and Technology Organisation for the sustainable building sector. He has been part of several European Commission expert groups and is a member of the water parliament of the South-West of France.David Tompkins is an environmental scientist with a multi-disciplinary background encompassing horticulture, soil science, composting, anaerobic digestion, wastewater treatment, market development and policy implementation. David is a technical consultant and senior manager for Aqua Enviro, specialising in various aspects of sewage sludges, biowastes and other bioresources: hazard management, valorisation, market development, end of waste and stakeholder engagement.

The INNOQUA project and book are so timely. Demonstrated at numerous locations worldwide, INNOQUA convincingly innovates the structure and process engineering of wastewater treatment in terms of 'Nature Based Solutions' - an eye opener! Congratulations and thanks to all members of the project team - one of whom sadly passed away just before this publication. It is with gratitude that we remember our academic advisor and friend Prof. Chris Buckley from the WASH R&D Centre at the University of KwaZulu Natal. His commitment to the INNOQUA project was invaluable. The time for wastewater innovation is now - INNOQUA shows us a way.

• ForewordChapter 1. Introduction to the INNOQUA projectChapter 2. Drivers and Barriers towards a Sustainability Transition in the Wastewater Sector – A NEXUS perspective with nature-based solutionsChapter 3. Why choose nature-based wastewater treatment systems?Chapter 4. Nature-based wastewater treatment – overview & current common systems in the Global SouthChapter 5. Primary and secondary treatment: VermifiltrationChapter 6. Daphniafilter: a nature-based tertiary treatmentChapter 7. Tertiary treatment: microalgae-based wastewater treatmentChapter 8. Disinfection options for decentralised wastewater treatmentChapter 9. INNOQUA – commercialisation opportunitiesAfterword