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Alternatives to Conventional Wastewater Systems

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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  1. Alternatives to Conventional Wastewater Systems

  2. EKBO – Ecological Tenant-Owners’ Society in Orhem • Stockholm, Sweden • Convalescent home retrofitted to tenant-owners’ society • Ecological housing

  3. Toilet System at EKBO– Gebers

  4. 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

  5. Urine Collection • Piping: • Ø50 • Polypropylene

  6. Urine Collection • Piping: • Ø50 • Polypropylene • Storage • Polypropylene • 3 x 4m3 Picture of urine tank

  7. 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!!!!!

  8. Feces Collection • Piping • Ø200 ”Spiro” • Storage • Common plastic bins

  9. Feces Collection • Piping • Ø200 ”Spiro” • Storage • Common plastic bins • Emptying • Feces compost • Apartment owner’s responsibility Picture of new compost

  10. 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

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

  12. 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

  13. 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.

  14. 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

  15. 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@ostermalm.stockholm.se

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