Alternatives to Conventional Wastewater Systems. EKBO – Ecological Tenant- Owners’ Society in Orhem Stockholm, Sweden Convalescent home retrofitted to.

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Presentation transcript:

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 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 USD

Urine Collection Piping: –Ø50 –Polypropylene

Urine Collection Piping: –Ø50 –Polypropylene Storage –Polypropylene –3 x 4m 3 Picture of urine tank

Urine Collection Piping: –Ø50 –Polypropylene Storage –Material, PP? –3 x 4-6 m 3 ?? Emptying –Frequency: 2-3 yearly –Cost: appr USD/year Ragnsells Agro!!!!!

Feces Collection Piping –Ø200 ”Spiro” Storage –Common plastic bins

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

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

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 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 (in Swedish) (in Swedish) (in English) Contact person: Nicholas Hort;