Post on 24-Nov-2014
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Flexible solutions on waste water Flexible solutions on waste water and surface water treatmentand surface water treatment
- Swedish experiences- Swedish experiences
Fredrik AgerhemFredrik Agerhem11-02-1111-02-11
Perspectives can distract
Swedish experiences on water treatment
• Systematic approach – structured environment– Legal (Swedish law and EU law)– Financial (end user/polluter pay principle)
• Openness to flexible solutions within a set structure– Strategic and long term solutions– Appropriate and demand driven technologies
• Communication
Either we pay the bill today, or our children will pay a higher price tomorrow
The value of water – Stockholm
Fixed charges (household):• Basic charge 115 USD/year• Usage charge 130 USD/year• Storm water charge 50 USD/yearVariable charge:• Amount of tap water 0,8 USD /m3
Average cost: 1,8 USD/m3*
Deliverables:• Unlimited drinking water• Waste water treatment• Storm water treatment
*300 m3/year/household
Global water charges USD/m3
Country Water Waste-water Total Domestic use (lpcd)
Denmark 8,83 - 8,83 114
Germany 3,12 1,75 4,87 151
France 3,58 0,66 4,24 232
UK 2,03 2,20 4,23 139
US 1,03 1,42 2,45 616
China 0,27 0,12 0,39 95
India 0,08 - 0,08 139
Source: Kotak Institutional Equities estimates
The value of water – India
Water source Rs/m3 USD/m3 CommentGround water - - No running costs as electricity is on low fixed rate
Municipal 5 0,1 Based on all India average of 20 cities
Tanker 80 1,7 Mumbai tanker rates (Rs 800 for 10 m3)
Bottled water > 7 200 > 157 Branded water, bottle of 25 ltr
Bottled water > 12 000 > 263 Branded water, bottle of 1 ltr
Source: Kotak Institutional Equities estimates
The cost of drinking water varies widely in India
Järven Ecotech – treating water in water
Järven has 25 years experience of providing cost efficient solutions for waste water and surface water treatment
WASTE WATER TREATMENT
Our challenge
Rural Sweden – small towns and villages• High variation on flow • High cost structure –labour, mechanical, energy• Same requirements (BOD, COD, Phosporus etc.)• Less supervision• Land available
Low cost + dependable + low energy = same quality
Fellingsdam- chemical precipitation in stabilization ponds
• High phosphorous reduction • Very high capture of particulate
oxygen depleting substances • Disinfection • Very energy efficient • Great sludge handling • Few moving parts • Highly dependable • Adaptable to environmental surroundings• No risk for overloaded systems
DOSAGE CONTAINER
Layout of Järven Fellingsdam system (constructed pond)
Biological activity, chemical precipitation and sedimentation
Fellingsdam in Funäsdalen, north Sweden
Sedimentation as a function of (ideal) detention time or travelling distance
Why and where are Fellingsdam of interest?
• Fellingsdams are low cost solutions.– Swedish comparisons give about 30 % of costs regarding
construction as well as operation and maintenance compared to compact plants
• Fellingsdams are low energy consumers – 0,23 kwh/m3 compared to median 0,70 kwh/m3 compact plants
• Fellingsdams give stable and good treatment results even at strongly variable loadings
• Fellingsdams are easy to operate• Fellingsdams utilise area instead of compact processes. Is
area available?
• Built in a standard 20” white container which guarantees easy handling.Built in a standard 20” white container which guarantees easy handling.• Easy access with all components within a few meters.Easy access with all components within a few meters.• Internal power supply to guarantee constant power supply.Internal power supply to guarantee constant power supply.• Diesel generator or solar cells with accumulator systemDiesel generator or solar cells with accumulator system• The floor has got an inspection cover, this give easy access to the mixture The floor has got an inspection cover, this give easy access to the mixture
cistern placed cistern placed under the container.under the container.• Great mobilityGreat mobility
Container based systemContainer based system
DOSAGE CONTAINER
Layout of Järven Fellingsdam system (treatment inside of waterbody)
Capacity is limited to mechanical and dosage container, but more lines could be added
Waterbody (river, lake)
SURFACE WATER TREATMENT
Stockholm, Sweden
Naturally clean water
Image: google earth
The principle in theory
Central bridge in Stockholm – surface water depositary that is almost invisible
• 65 % phosphorus reduction• 50 % nitrogen reduction• High reduction in particulate-bound heavy metals• No chemicals added• No energy consumption• No land requirement
SURFACE WATER PURIFICATIONIN THE RECIPIENT
Lake Trekanten
Purification plants in flowing water
• To be able to withstand flowing water ( >2 M/s ) a velocity absorber have to be placed upstream of the plant
• There is a built in obstacle to prevent spawning fish to enter the plant.
Drevviken – surface water purification the natural way
Healthcare Acoustics Water Sanitation
JARVEN.SE
Appropriate solutions. Delivered.