Alternatives to Conventional Wastewater Systems

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Alternatives to Conventional Wastewater Systems
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EKBO Ecological Tenant-Owners Society in Orhem

• Stockholm, Sweden
• Convalescent home retrofitted to tenant-owners
  society
• Ecological housing

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Toilet System at EKBO Gebers
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Collection of Urine and Feces The Toilet

• Single-flush urine-diverting toilet
• Manufacturer Wost Man Ecology
• Porcelain toilet
• 0.1 L/flush for rinsing urine bowl
• Dry collection of feces
• Price per toilet appr. 300 USD
• Price for urine collection system appr 500 USD
• Price for feces collection system appr. 3000 USD

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Urine Collection

• Piping
• Ø50
• Polypropylene

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Urine Collection

• Piping
• Ø50
• Polypropylene
• Storage
• Polypropylene
• 3 x 4m3

Picture of urine tank
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Urine Collection

• Piping
• Ø50
• Polypropylene
• Storage
• Material, PP?
• 3 x 4-6 m3 ??
• Emptying
• Frequency 2-3 yearly
• Cost appr. 1000 USD/year Ragnsells Agro!!!!!

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Feces Collection

• Piping
• Ø200 Spiro
• Storage
• Common plastic bins

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Feces Collection

• Piping
• Ø200 Spiro
• Storage
• Common plastic bins
• Emptying
• Feces compost
• Apartment owners responsibility

Picture of new compost
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Feces Treatment

• Feces compost
• Two dedicated composting specialists for OM
• Has never been emptied
• Soil-like appearance after composting
• Will be used as soil conditioner on a farm 10 km
  away

Picture of the compost
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Grey Water Treatment

• No local grey water treatment at present
• The grey water is conveyed to the municipal
  wastewater treatment plant for the area.

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Reuse of Resources Urine

• Storage for 6 months
• 3 x 150 m3
• Used as fertilizer at Lake Bornsjön
• Barley cultivated for 5-6 years
• Appr 2 hectares can be fertilized from Gebers

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Reuse of Resources Feces

• Feces compost not yet emptied.
• Agreement with farmer 10 km away for use as soil
  conditioner.
• First transport and reuse during 2003 or 2004.

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Lessons Learned from the EKBO Project

• The overall performance is satisfactory for the
  users of the sanitation system.
• Occasional problems arising have been solved by
  good routines
• Need of development of sanitation system
• The handling of the feces fraction can be made
  cheaper and simplified in newly constructed
  houses
• Information program for users

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More Information

• www.ekbo.se (in Swedish)
• www.lt.slu.se (in Swedish)
• www.iees.ch/cs/cs_4.html (in English)
• Contact person Nicholas Hort nicholas.hort_at_oster
  malm.stockholm.se