SustUrbanFoods

Integrated sustainability assessment of social and technological innovations towards urban food systems


Case study: DIE URBANISTEN aquaponics system – Dortmund (Germany)

Location: Dortmund, Germany
Typology: Modular protected aquaponics
Urban area: Urban
Innovation type: Technological innovation
Main functions: Water recirculation – Polyculture – Research

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HISTORY & CONTEXT

The aquaponics system of die Urbanisten is placed in the Union Gewerbehof in Dortmund. It was implemented in 2013 for demonstrative purposes. The installation consists of a 22m2 unheated greenhouse made of aluminum, plastic and glass, where the aquaculture and soil-less production are integrated. On the on hand, the aquaculture production is performed in a 1m3 IBC container and water is filtered by biological and mechanical processes. On the other hand, the soil-less production system is done on expanded clay in polyethylene boxes.

AGRICULTURAL & AQUACULTURAL CHARACTERISTICS

Crops: Tomatoes, Mint, Lettuce, Arugula, Lettuce, Lemon balm, Basil (African blue), True Water Cress

Fish: Grass Carp (Ctenopharyngodon idella), Tench (Tinca tinca)

Techniques: Aquaponics production: Aquaculture tank with filters (biological & mechanical) + Soil-less vegetables production with expanded clay

Irrigation: Tap water – Recirculation – Automatic irrigation

Use of renewable resources: –

Sustainable practices: Pesticides-free – Integrated pest management – Local production – Minimization of water consumption – Sustainable production of protein sources

Other products: –

LINKS


Case study: SWUAS aquaponics system – Soest (Germany)

Location: Soest, Germany
Typology: Protected aquaponics
Urban area: Urban
Innovation type: Technological innovation
Main functions: Water recirculation – Polyculture – Research

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HISTORY & CONTEXT

The aquaponics system at SWUAS (Fachbereich Agrarwirtschaft der Fachhochschule Südwestfalen) was implemented for research purposes. The installation started in May 2015. Regarding the aquaculture system, European catfish are held in three 1.1 cubic meter tanks, equipped with filters, feeders and warm water. The fish production is connected to the floating hydroponic system hosted in the greenhouse next door, growing in deep water culture beds (DWC). Aquaponics seeks for resource efficiency by recirculating the water between the two systems: the water from fish farming (aquaculture) flows into the plant basins (hydroponics) where the fish residues are used as fertilizers.

AGRICULTURAL & AQUACULTURAL CHARACTERISTICS

Crops: Lettuce (Salanova cook RZ), Lemon balm and Basil (African blue)

Fish: European catfish (Silurus glanis)

Techniques: Aquaponics production: Aquaculture tanks with UV disinfection and filters (biological & mechanical) + Floating hydroponic production with wooden beds

Irrigation: Well water (Elevated amount of calcium carbonate)– Recirculation – Automatic irrigation (Tap water is available)

Use of renewable resources: –

Sustainable practices: Pesticides-free – Integrated pest management – Local production – Minimization of water consumption – Sustainable production of protein sources

Other products: –

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LINKS