wastewater – exploring the options module 5 of the switch training kit

WASTEWATER – Exploring the optionsModule 5 of the SWITCH Training kit

Project outline, Management and Organisation

The SWITCH Training Kit

WASTEWATER – Exploring the optionswww.switchtraining.eu


Contents• Chapter 1 – The need for sustainable wastewater management• Chapter 2 – Wastewater in the city• Chapter 3 – Wastewater and sustainability• Chapter 4 – Putting integrated wastewater management into practice• Chapter 5 – Options for sustainable wastewater management

WASTEWATER – Exploring the optionswww.switchtraining.eu


Chapter 1 – The need for sustainable wastewater management

WASTEWATER – Exploring the optionsChapter 1 – The need for sustainable wastewater management

www.switchtraining.eu


Domestic wastewater streams


Image: Wageningen University



Contents of wastewater elements


Image: Wageningen University


Project outline, Management and Organisation WASTEWATER – Exploring the optionsChapter 1 – The need for sustainable wastewater management

The conventional approach to wastewater management



Issues arising from conventional wastewatermanagement

• Dilution of flows• High water use• Pollution risk• Cost• High energy demand• Waste of a valuable resource• Nutrient overload• Lack of flexibility• Inappropriate for local conditions




Future issues facing the conventional approach


Urbanisation

Deterioration of infrastructure

Future energy costs

Climate change

Stricter environmental

legislation

Population growth



Linear versus cyclical wastewater management




A more integrated approach…




Benefits of taking a more integrated approach• Increased access to sanitation• Water savings• Flexibility to population growth• Recycling of plant nutrients• Financial savings• Employment generation• Energy recovery• More efficient treatment• Urban biodiversity and amenity




Chapter 2 – Wastewater in the city

WASTEWATER – Exploring the optionsChapter 2 – Wastewater in the city



Linkages within the urban water cycle




Linkages between wastewater and other urbanmanagement sectors


Urban agriculture

Housing

Parks and recreation

Energy

Health and poverty alleviation

Education

Environmental management



Wastewater management and urban agriculture


Imag

e: R

ené

van

Veen

huiz

en



Wastewater management and the natural environment


Imag

e: W

agen

inge

n U

nive

rsity



Chapter 3 – Wastewater and sustainability

WASTEWATER – Exploring the optionsChapter 3 – Wastewater and sustainability



Chapter 4 – Putting integrated wastewater management into practice

Imag

e:Ra

lph

Phili

p

Imag

e:Ra

lph

Phili

p

WASTEWATER – Exploring the optionsChapter 4 – Putting integrated wastewater management into practice

Imag

e: P

rit S

alia

n

Imag

e: P

rit S

alia

n



Opportunities to start implementing more sustainable wastewater management

• New developments• Sludge management• Incremental improvements• Alternative solutions• Market creation




Barriers to integrated wastewater management



• Public acceptance• Legal restrictions• Institutional aspects• Political motivation• Technical norms• Land rights• Perceived risk


Ways to overcome these barriers

• Stakeholder engagement• Institutional coordination• Demonstration projects• Awareness raising• Creating incentives• Political support




Chapter 5 – Options for sustainable wastewater management

WASTEWATER – Exploring the optionsChapter 5 – Options for sustainable wastewater management



Option: Urine diversion toilets – how they work




Option: Urine diversion toilets – positive influences




Option: Soil Aquifer Treatment (SAT) – how it works


Image: Mekorot National Water Company



Option: Soil Aquifer Treatment (SAT) – positive influences




Option: Constructed wetlands – how they work




Option: Constructed wetlands – positive influences




Option: Waste Stabilisation Ponds (WSP) – how they work




Option: Waste Stabilisation Ponds (WSP) – positive influences




Option: Biogas production – how it works




Option: Biogas production – positive influences




Option: Sludge reuse – how it works

Images: slamspridning_Cirkulation




Option: Sludge reuse – positive influences




Option: Greywater reuse – how it works

Images: J. Wardale




Option: Greywater reuse – positive influences




Selecting options


• Consider all aspects of sustainability• Assess:

o costo social implications o unwanted side effectso environmental implications

• Concessions are inevitable• Decision-support tools are available


Slides produced by:ICLEI European Secretariat

© 2011 ICLEI European Secretariat GmbH, Leopoldring 3, 79098 Freiburg, Germany

The contents of the SWITCH Training Desk website are under a license of Creative Commons specified as Attribution-Noncommercial-Share Alike 3.0. This license allows others to remix, tweak, and build upon the training materials for non-commercial purposes, as long as they credit the copyright holder and license their new creations under the identical terms. http://creativecommons.org/licenses/by-nc-sa/3.0/The full legal text concerning the terms of use of this license can be found at http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode


wastewater – exploring the options module 5 of the switch training kit

Documents