2. Public parks
Solar thermal plants
Irrigation ponds
Ornamental lakes
• Large variety of
ecosystems
–Shape
–Size
–Construction
–Use...
Freshwater ecosystems
3. Freshwater ecosystem proper
operation
ALGAE
Chlorophyll “a”
Animal
biomass:
Zooplancton
Fishes
….
O2
Nutrients
N and P
Nutrients input
Light
Sun
(Energy
)
- All components are connected
- Natural balance
- “Alive” dynamic systems
5. Freshwater ecosystem improper
operation
ALGAE BLOOM !!!
Turbidity increases
Oxygen decreases
Anaerobic process: malodorous gases
Accumulation of reduced substances
(sulphides, ammonium, Fe, Mg...)
DECREASING WATER QUALITY:
Loss of natural balance
between input nutrients and algae
6. Algal bloom
Relationship between nutrients and the algal community weight:
1P: 7N: 40C: 100 g dry weight: 500 g wet weight
(Vallentyne, 1978)
1 gram of phosphorus can produce up 500 grams of algal biomass
7. Solutions against eutrophication
CURATIVE MEASURES
Anti-algae chemicals with
immediate action
Short-term treatment
TEMPORAL EFFECTS
PREVENTIVE MEASURES
(Water quality improving)
Medium/long-term treatment
PERMANENT EFFECTS
MORE EFFICIENT
8. Solutions against eutrophication
PREVENTIVE MEASURES
(Water quality improving)
Medium/long-term treatment
PERMANENT EFFECTS
MORE EFFICIENT
Ultrasonic treatment against algae
10. DUMO Algacleaner on
freshwater ecosystems
• DUMO Algacleaner can reduce algal
biomass in 42 days.
Ultrasonic treatment with DUMO Algacleaner in an irrigation pond with wastewater input. Cyanophyte Mycrocistis aeruginosa bloom.
Test carried out by the Experimental Centre of New Technologies of Water (CENTA) in 2014 (www.centa.es)