alternatives to conventional wastewater systems. ekbo – ecological tenant- owners’ society in...
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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
• 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
• Piping:– Ø50– Polypropylene
Urine Collection
• Piping:– Ø50– Polypropylene
• Storage– Polypropylene– 3 x 4m3
Picture of urine tank
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
• 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 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
• 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
• www.ekbo.se (in Swedish)• www.lt.slu.se (in Swedish)• www.iees.ch/cs/cs_4.html (in English)• Contact person: Nicholas Hort;