CEDA Dredging Days Antwerp Steps towards the development of green dredging technology 3 October 2008 Henk van Muijen MTI Holland BV

CEDA Dredging Days Antwerp The way to development of green, sustainable dredging technology What is sustainability? What does this mean for IHC Merwede? How can we develop sustainable dredging technology?

CEDA Dredging Days Antwerp Background Growing awareness of the effects human activities in the ecosystems, Increasingly demanding legislation on Materials and production Energy use and emissions Operations (precision, turbidity, lubricants, noise) IHC Merwede feels responsibility for: Sustainable design and production of equipment That allows sustainable dredging

CEDA Dredging Days Antwerp Our understanding of sustainability Brundtland definiton as basis: “provide the needs of the present generations without compromising the capability of the future generations to meet their needs” Dynamic interaction among all fields External and internal driving forces act in a synergic way to create new sustainable business opportunities Learning process (not static) Essential to include all stakeholders in a participative way

CEDA Dredging Days Antwerp Focus on products, dredging process is the boundary for input/feedback What it means for IHC Merwede Define and implement a Sustainability Strategy Re-thing design, production, maintenance and recycling according to sustainability principles SCR initiatives, assess secondary processes (office) Awareness growth within company Intensive cooperation with all stakeholders

CEDA Dredging Days Antwerp How we do: “Sustainability and Dredging” Long-term research program Cooperation with all stakeholders Multidisciplinary approach Consulting experts (internal and external) Pilot projects / demo-models / prototypes Design guidelines / decision support tools Participation in the EcoShape: Building with Nature program

CEDA Dredging Days Antwerp Many efforts in the direction of sustainability have been already taken. Some examples are: State-of-the art High efficiency pumps Better cutting tools submerged pumps (high density dredging) Environmental dredging

CEDA Dredging Days Antwerp Improved hopper sedimentation Automation and control State-of-the art

CEDA Dredging Days Antwerp Optimised hull design State-of-the art Conventional hull design

CEDA Dredging Days Antwerp Paradigm shift vs incremental steps Sustainable solutions require fundamental re-thinking, but also incremental steps for the short term solutions. On the light of sustainability principles and guidelines “Re-invent the way we invent things” ( M.Braungart & W. McDonough, Cradle to Cradle)

CEDA Dredging Days Antwerp Paradigm shift Seminar held in April, with a variety of participants and varied program

CEDA Dredging Days Antwerp Paradigm shift directions for increased sustainability: Turbidity control Energy emissions Sustainable equipment and production From the seminar the main

CEDA Dredging Days Antwerp Turbidity control Control overflow turbidity, according to background levels and ecosystem resilience Precise dredging Further develop high density dredging Understanding and controlling factors that influence re- suspension

CEDA Dredging Days Antwerp Energy and emissions Dredging process requires high energy density Combustion of fossile fuels originates emissions (SOx, NOx, CO 2, PM, etc…) IMO regulation soon introduces severe limits on emissions of NOx, SOx, usual fuels (HDF) cannot comply Future regulation expected to limit CO 2, PM, other emissions including noise Renewable alternatives not sufficiently developed yet

CEDA Dredging Days Antwerp Roadmap to sustainable energy supply and use Energy Index I for dredging Dredging can be optimised for maximum energy efficiency! 1. Increase energy efficiency

CEDA Dredging Days Antwerp Example TSHD 4500 m3 Sailing distance 6.75 miles Dsuction 900 mm Energy index: I = Question: Given an equal capacity, will a smaller suction tube give a lower index or not? Answer: Energy index becomes: I = at Dsuction = 800 mm At a distance of 40 miles, a Dsuction of 800 mm is somewhat better

CEDA Dredging Days Antwerp Roadmap to sustainable energy supply and use 2. Change to more sustainable energy sources LNG Synthetic fuels Nuclear (risk too high, preferable onshore generation) Conventional Hybrid systems Higher efficiency of whole power supply, lower emissions

CEDA Dredging Days Antwerp Roadmap to sustainable energy supply and use 3. Gradual shift to sustainable energy sources Solar Wind Bio-fuels Batteries Fuel cell combined turbines Fuel cell hybrid systems Not sufficient yet for main power supply, but rapid developments occur at the moment

CEDA Dredging Days Antwerp Sustainable equipment and production

CEDA Dredging Days Antwerp Sustainable equipment and production Life cycle perspective (production-use-disposal) Focus on functionality Careful material choice that is safe and allows re-use or recycling without losses = up-cycling Clean and efficient production processes Maintenance to minimise life-cycle costs Controlled disposal Crew training and awareness building

CEDA Dredging Days Antwerp

Future issues Ballast water Greenhouse gases Recycling Underwater noise Anti fouling Could this be the solution?

CEDA Dredging Days Antwerp Conclusions Dredging process: equipment adaptation and innovation Energy issues and emission control Equipment redesign and production Steps Toward Development of Green Dredging Technology Ecology Economy Society Turbidity control Precise dredging High density Air pollution Water pollution Sustainable energy sources Life cycle support Maintenance Sustainable design

CEDA Dredging Days Antwerp Steps towards the development of green dredging technology