Alternatives to conventional wastewater systems
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Alternatives to Conventional Wastewater Systems. EKBO – Ecological Tenant-Owners’ Society in Orhem. Stockholm, Sweden Convalescent home retrofitted to tenant-owners’ society Ecological housing. Toilet System at EKBO – Gebers. Collection of Urine and Feces – The Toilet.

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Alternatives to Conventional Wastewater Systems

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Alternatives to conventional wastewater systems

Alternatives to Conventional Wastewater Systems


Ekbo ecological tenant owners society in orhem

EKBO – Ecological Tenant-Owners’ Society in Orhem

  • Stockholm, Sweden

  • Convalescent home retrofitted to tenant-owners’ society

  • Ecological housing


Toilet system at ekbo gebers

Toilet System at EKBO– Gebers


Collection of urine and feces the toilet

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


Urine collection

Urine Collection

  • Piping:

    • Ø50

    • Polypropylene


Urine collection1

Urine Collection

  • Piping:

    • Ø50

    • Polypropylene

  • Storage

    • Polypropylene

    • 3 x 4m3

Picture of urine tank


Urine collection2

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!!!!!


Feces collection

Feces Collection

  • Piping

    • Ø200 ”Spiro”

  • Storage

    • Common plastic bins


Feces collection1

Feces Collection

  • Piping

    • Ø200 ”Spiro”

  • Storage

    • Common plastic bins

  • Emptying

    • Feces compost

    • Apartment owner’s responsibility

Picture of new compost


Feces treatment

Feces Treatment

  • Feces compost

    • Two dedicated ”composting specialists” for O&M

    • 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


Grey water treatment

Grey Water Treatment

  • No local grey water treatment at present

  • The grey water is conveyed to the municipal wastewater treatment plant for the area.


Reuse of resources urine

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


Reuse of resources feces

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.


Lessons learned from the ekbo project

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


More information

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; [email protected]


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