materials and adapt the plan during the retrofit process. In phase two, the boats will be placed on the site, the phytoremediation garden will be planted, and the communal infrastructure will be built. A central feature of the technology plan in this phase is the construction of the D-SARR system, a waste treatment and resource recovery unit that will serve the entire de Ceuvel site, producing biogas and harvesting nutrients for on-site use. Additionally, urban food production and floating gardens will be deployed during this stage. Electric power generation capacity will also be installed in this phase if sufficient funding is acquired. If not, this step will be pushed to phase three. A site-wide IT system will show live feeds of all resources used and produced on site to give users feedback about their behavior and showcase the performance of these technologies for visitors to the area. This IT platform will also serve as a collection point for information on monitoring biodiversity, and sharing resources (such as cars or tools) among site users. The total estimated costs of phase two development are 10.000 € per boat. By 2014, once the two first development phases of the de Ceuvel site have been completed, the houseboats on the de Ceuvel site should be fully self-sufficient in renewable heat and electricity supply, water collection and upgrading, and 50 - 70% lower electricity demand than a conventional office building. The buildings themselves will not only be highly eco-efficient, but also designed in a variety of architectural styles with creative exterior finishing. In phase three of the development, which spans the remaining period of the ten year lease, the technological plan should remain flexible and continue to evolve. The site can serve as a pilot space for decentralized, renewable technologies. If the association managing the site is able to generate profits from festivals, educational activities, and other planned sources of income, these can partially be re-invested in the continued development of the plan. FINAL SYSTEM PERFORMANCE The de Ceuvel development plan has the following key features: › FINAL TARGETS ACHIEVED (HIGHLIGHTS): › 100% renewable heat and hot water supply › 100% renewable electricity › 100% wastewater and organic waste treatment › 100% water self-sufficiency › 60 - 80% nutrient recovery › 50 - 70% reduction in electricity demand over conventional offices › 10 - 30% vegetable & fruit production using locally recovered nutrients “Featherlight” footprint: infrastructure on site will be minimized, with the objective of all boats only having a connection to the electric grid, but no other utility demands. As largely autarkic elements, the boats will be able to leave the site aſter ten years without leaving much of a trace. › Regenerative development: the phytoremediation plan and biodiverisity measures will result in a cleaner and more biodiverse area than at the start of the project. › Fast return on investment: using a DIY approach and recycled materials, return on investment is possible in under five years for all recommended interventions. › Closed material cycles: reuse of nutrients and energy on site. › Evolving technology landscape: continual improvement of system performance by adopting new technologies as they become avaiable and afFordable. Greenhouses Green roof terraces Solar heat collectors Solar PV cells 250 sqm 600 sqm 80 sqm (5 sqm / house) 160 sqm (10 sqm / house) DESAR organic waste treatment Reedbed filtration Food production Ecosystem elements 110 sqm 200 sqm (1,4 sqm/person) 300 sqm 1.500 sqm › sensor network and real-time system performance displays Pagina 16
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