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Methods of Managing Lakes. Use of herbicides to manage weed problemsNutrient reduction to starve weeds and/or improve water qualityMechanical methodsBiological methodsCombination of methods. Herbicide Use. The best solution when water quality is not a consideration or cannot be changedCopper Sulfate causes damage to snails, mollusks and bacteriaCan achieve a fast, wide range of results.
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1. Liquid Live Micro Organisms (LLMO) A Live Bacterial Treatment for Water Management
3. Herbicide Use The best solution when water quality is not a consideration or cannot be changed
Copper Sulfate causes damage to snails, mollusks and bacteria
Can achieve a fast, wide range of results
4. Nutrient Reduction Should be the goal of all lake managers
Eutrophication (richness) is the term used by lake managers to categorize lake water quality
Four eutrophic states are usually recognized
5. Oligotrophic Chl ug/l = <.95 - 2.6 FL mean 23
SD m = > 8 - 4 FL mean 1.9
TP ug/l = <6 -12 FL mean 37
Characterized by:
Clear water
Salmonid fisheries where appropriate
Adequate oxygen
6. Mesotrophic Chl ug.l = 2.6 - 7.3 FL mean 23
SD = 4 - 2 FL mean 1.9
TP ug/l = 12 - 24 FL mean 37
Characterized by:
Water moderately clear
Loss of salmonids where applicable
Walleye fishing where possible
Fe, Mn, odor and taste problems worsen
O2 problems may occur in the summer
7. Eutrophic Chl ug/l = 7.3 - 56 FL mean 23
SD m = 2 - .5 FL mean 1.9
TP ug/l = 24 - 96 FL mean 37
Characterized by:
Blue- green algae
Macrophyte problems
Odor - taste problems
Oxygen problems, possible fish kills
Aesthetic problems discourage swimming
8. Hypereutrophic Chl ug/l = 56 - >155 FL mean 23
SD m = .5 - <.25 FL mean 1.9
TP ug/l = 96 - 384 FL mean 37
Characterized by
Dense algae
Light limited productivity
Rough fish dominate
Oxygen problems, summer fish kills possible
9. Lake Life-Span Varies with nutrient input
Land use greatly affects nutrient input
runoff through storm systems
effluent - septic systems
agriculture runoff
deforestation
industry
artificial fertilizers
10. Nutrient Loading Consider budget for lakes nutrient input-output
Have lake P, N and Chl analyzed
Usually P is the limiting factor for growth
Use trophic state to evaluate lakes
Trophic state index (TSI) available
Several methods of decreasing nutrients available
11. Nutrient (P) Reduction By: Calcium Carbonate at pH >9
Other calcium compounds (Ca(NO3)) (Ca(OH)2)
Aluminum Sulfate (Alum) at pH 6-8
(1-800-642-4200 application handbook)
Aluminum Chloride
Aluminum Chlorohydrate
Ferric Chloride
Ferrous Sulfate Monohydrate
PolyClay
LLMO
Aeration
12. When Not to Use LLMO If the lake is very shallow (<.5 m)
If the lake has poor oxygenation (some of the bacteria in LLMO need oxygen)
In moving water
If immediate results are needed
If this is expected to control all lake problems
13. How to use LLMO In conjunction with herbicides and dyes as needed but not with copper products
If alum or calcium is needed for fast removal of phosphate, use LLMO 2-3 weeks after treatments for continued nutrient removal
Best to start early spring before lakes become unsightly
14. LLMO Increases applicator safety
Improves water quality - reduces N & P
Improves wildlife habitat
Reduces odor from lakes and ponds
15. LLMO Increases water clarity
Decomposes sludge (bottom sediments)
Increases dissolved oxygen
Reduces chance of fish kills
16. LLMO All bacteria in LLMO is considered safe (Class 1 by American Type Culture Collection) in schools and classrooms
Enhances public awareness programs
Cannot possibly be detrimental to turf with irrigation
Reduces BOD in water bodies
17. Why The Need For LLMO Increased use of fertilizers
Reduction of filtering marshes
Increased use of copper algaecides inhibiting positive values of beneficial bacteria
Greater amount of (Non Point Source) pollution
Copper products kill organisms at the lower end of food chain
18. Compared To Other Bacteria Products Live bacteria are killed in the freeze-drying process of other brands, leaving only the dormant reproductive spores
Live-cultured LLMO are active, live cultures, thus more cost effective
19. Compared To Other Bacteria Products Much higher cell count per gallon (about 700 billion) for LLMO
Tank growth system for nitrifiers are very important because of the slow growth rate of the nitrifiers
LLMO has been manufactured for environmental purposes since 1974
20. Bacterial Augmentation Bacteria utilize nutrient in the water
Bacteria convert carbon compounds (sludge) to CO2
Denitrification occurs under anaerobic conditions (NO3 to NO2 to N2)
Nitrification occurs under aerobic conditions (NH3 to NO2 to NO3)
21. Bacterial Augmentation LLMO bacteria which consume phosphate are utilized by protozoa then the protozoa are ultimately utilized by fish
Phosphates also can be permanently precipitated or are chelated to bottom sediments
22. Growing LLMO
23. Bacteria in LLMO NH3 to NO2 by Nitrosomonas
NO2 to NO3 by Nitrobacter
both are soil bacteria; both are required for nitrification and both need aerobic conditions
Aerobacter aerogens
aerobic
oxidizes carbohydrates C+(H2O) (sugars, starches and celluloses) and short organic acid chains to CO2 and H2O
when O2 is limited it ferments carbohydrates which become food for Pseudomonas sp.
24. Bacteria in LLMO Bacillus subtillus, B. licheniformis
B. amyloliquefaciens
oxidizes carbohydrates, organic acids, fats, oils, proteins and starches
active in the soil; it’s enzymes degrade organic material
denitrifying bacteria (NO3 to NO2 to N2)
Cellulomonas biazotea
converts cellulose to soluble carbohydrates which serve for growth of C. biazotea and other bacteria
Pseudomonas denitificans and P. stutzsri
reduces nitrate nitrogen under anaerobic conditions
oxidizes and degrades organic compounds
25. Primary Uses Littoral zones, lakes, sewage, septic tanks, leach fields, drains, sludge removal, odor control, aquaculture, lake restoration and more
Golf courses concerned with environmental, water quality and turf issues
26. Requirements Tank, electrical power (110 volt) to grow bacteria and a simple distribution method
Lake treatments every 14 days throughout most of the year
Can not be used with copper algaecide products