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Alternatives to Conventional
Wastewater Systems
EKBO – Ecological TenantOwners’ Society in Orhem
• Stockholm, Sweden
• Convalescent home
retrofitted to tenantowners’ society
• Ecological housing
Toilet System at EKBO
– Gebers
Collection of Urine and Feces
– The Toilet
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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
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Piping:
– Ø50
– Polypropylene
Urine Collection
Picture of urine tank
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Piping:
– Ø50
– Polypropylene
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Storage
– Polypropylene
– 3 x 4m3
Urine Collection
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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
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Piping
– Ø200 ”Spiro”
Storage
– Common plastic
bins
Feces Collection
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Picture of new compost
Piping
– Ø200 ”Spiro”
Storage
– Common plastic bins
Emptying
– Feces compost
– Apartment owner’s
responsibility
Feces Treatment
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Picture of the compost
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
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
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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
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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
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The overall performance is satisfactory for the
users of the sanitation system.
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Occasional problems arising have been solved by
good routines
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Need of development of sanitation system
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The handling of the feces fraction can be made
cheaper and simplified in newly constructed
houses
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Information program for users
More Information
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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]