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Technische Universitaet Muenchen – Institute for Advanced Study STOA Annual Lecture, Brussels, 29-11-2011 Managing Water Supply and Sanitation in a Crowded.

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Presentation on theme: "Technische Universitaet Muenchen – Institute for Advanced Study STOA Annual Lecture, Brussels, 29-11-2011 Managing Water Supply and Sanitation in a Crowded."— Presentation transcript:

1 Technische Universitaet Muenchen – Institute for Advanced Study STOA Annual Lecture, Brussels, Managing Water Supply and Sanitation in a Crowded World Peter A. Wilderer Munich, Germany problems & solutions

2 7 billion people on Earth more alarming is compression of people in specific areas > 60% live in coastal zones > 50% live in cities

3 the consequence: amplified by: globalization of western lifestyle progress of complexity demand: water food energy land etc. pollution: air water soil mindset etc. local increase of demand and pollution

4 on the other side locally available resources are limited pollution and over-abstraction deteriorate quantity and quality of resources

5 sequence of causes and results local population growth local growth of - demand - pollution deficiencies destabilization - economies - societies migration

6 the traditional approach to solution: increased exploitation of natural resources loss of eco-system function what did James Lovelock say? eco-system function warrants life on Earth - control of surface temperature - control of precipitation paterns - ability to absorb disturbances (resilience)

7 we are faced with global crises: the big 4 ecosystem dysfunction destabilization (societies & economies) deficiency of resources climate change

8 all 4 crises are delicately interwoven balancing climate perserving ecosystem function satisfying demands stabilizing societies & economies to keep our eco-socio-economic system stabel all 4 crises are to be solved simultaneously

9 concerted action is required to reach solution ecosystem dysfunction destabilization (societies & economies) deficiency of resources climate change

10 water plays an overarching role preservating ecosystem function stabilizing - societies - economies securing supply of food - water - health mitigating climate impacts water resources management – build-up of urban water infra-structure

11 our current approach: copied from ancient Romans water is used just once

12 our current approach: upgraded during the past 150 years in-appropriate when water is scarce WW treatment pumps water work sewer pipes

13 the smart way of using water applying innovative technology for converting wastewater into water ready for use notice: wastewater is a resource urban water reuse

14 goal: minimization of water abstraction from natural resources minimization of costs for sewer installation minimization of time for installation targets: peri-urban agriculture - parks - gardens housing areas high-rise buildings hotel complexes enterprises - not yet properly served - in water stressed areas

15 roof-top hydroponics using customized recycling water yield: 22 t/year of leafy vegetables installation costs: ca. 30,000 Euro (olympic swiming pool size) growth of leafy vegetables for direct human consumption by spraying treated wastewater to the roots result: - reduced fresh water abstraction - reduced demand of land for agriculture - reduced need for transportation (water, food) Changi General Hospital – Dr. Chow

16 solution for a housing area water purification underneath a court yard purified water for toilet flushing cleaning landscape irrigation steep gravity sewer: low demand of flushing water purification plant Abwasser

17 airplane shower allow passengers to shower with 15 liters of water only applicable also for commercial laundries

18 Urban Sustainability Centre - London Siemens AG Forum and Exhibition Hall Themes: decentralized energy generation e-mobility infrastructure decentralized water treatment and reuse tele-communication

19 dezentralization requires central monitoring & control DeSa/R: Decentralized Sanitation and Reuse

20 summary solution of the big 4 global challenges requires concerted action smart use of water makes the trick water reuse is an option to be considered when water is scarce helps satisfying the needs of people, industry and ecology alike water reuse in urban areas (not yet served) requires decentralization of water purification technology technology of decentralized water management requires participation, innovation, demonstration and proper regulation

21 participation end-user regulators teachers city planers architects engineers operators scientists

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