Duckweed

 
 
   

Biological Products:

 

 

Bioaugmentation products for Wastewater applications in Papermills, Refineries, Chemical, Tanneries, Municipalities, Textiles, Steel, Agriculture, Animal feedlot,  Gun Powder plant, Food and Beverage- Dairy Products, Orange Juice factory, Wineries, Cookie factory, Vegetable processing plant, Meat packing, Barbecue Restaurant, Aquaculture, Ornamental Ponds for algae control, CAFO, Nursing homes, Military, Campgrounds, Universities, Regulatory agencies

 

 

Lab Services:

 

 

Filamentous Identification Lab Service. One reason to identify filaments is to determine the filaments characteristics and then determine the type present.  If the type is found out, a root cause can usually be associated with a particular filament.  If the cause is known, then a correction can be made to alleviate problems. Chlorination is only a quick fix.  Without process changes, filaments will grow back after chlorination.

Wastewater Biomass Analyses and Cooling Tower Analyses also available

 

Training Materials:

 

 

Training is an integral part of any job. Not everyone is at the same level of training. Many people want beginning concepts and basics. Some need technical information or troubleshooting. Some want equipment, technology or process information.

We have developed a full set of Basic training, Advanced training, Filamentous Identification the Easy Way as well as custom training CD's Manuals. We also provide hands-on training classes and soon will have an Online "E-University".

 

Audits and Consulting:

 

At Environmental Leverage® Inc., we have a team of experienced individuals who come into your plant with a fresh pair of eyes.  The system is checked from influent to effluent.  System optimization, equipment efficiency and operational excellence are key components explored. Key Benefits Equipment efficiency Total Cost of Operation reductions Reliability and safety

An onsite audit is conducted to examine system parameters, process controls, and current monitor and control procedures. A physical walk-through is conducted, process flow diagrams are examined, previous design criteria are examined and current standard operating procedures are evaluated along with data logs.

 

 


 

Troubleshooting-Duckweed

Latest News!

What's New!

We have just added "Virtual Audits" to our capabilities. Check out our new Services.  We are in the process of developing new courses for our ""Online E-University" in order to meet the needs of our global customers that cannot travel to our public classes.Visit our new website www.WastewaterElearning.com/Elearning

 

Oh no, my pond is covered with this thick green stuff? What is it?

 

duckweedChances are it is duckweed or algae.
 
Duckweed belongs to the family Lemnaceae and is small, free floating green plants that form large blankets on the surface of sheltered water.  The body of duckweed is composed of a simple floating disc of photosynthetic tissue often with roots attached.  It is not differentiated into stem and leaf tissue.  All species of duckweed supposedly produce minute flowers, but these flowers are seldom observed.  Reproduction is generally vegetative and its growth rate is tremendous, A thumb-sized planting will cover 1.2 acres in 55 days if uninhibited.

 

 Duckweed has some desirable properties for water purification.  Duckweed treats waste by breaking it down and converting it into two components:   biomass (duckweed leaves and roots) and treated water. Using duckweed for water purification is definitely low tech and needs a lot of space to be effective.   Also, duckweed cannot process heavy metals, pesticides, or toxic substances.

 

 Duckweed blooms typically occur in shallow waters rich in nutrients, especially phosphorus and/or nitrogen.  Many studies have indicated that duckweed growth is a function of nutrient levels and not pH and/or temperature.  If duckweed becomes an operational problem (i.e. clogging outlets), destroying the duckweed layer with herbicides does not solve the problem of excessive nutrients in the water.  In addition, the chemical herbicides may be toxic to animal life, either directly or through biological magnification.

duckweed clarifier duckweed primary

 Because of the exponential growth rate Lemnaceae, herbicides must be used repeatedly   (perhaps several times a year).  Herbicides should be used with extreme caution and under careful supervision.  Biological controls using ducks, fish, turtles, and crustaceans may also help control duckweed populations; however, this type of control is generally not suitable for wastewater systems.  The mechanical removal of the duckweed cover can also remove some the nutrients.  Stopping the inflow of excessive nutrients and the repetitive removal of the duckweed will greatly reduce the growth of duckweeds.  Ideally, the best control is to eliminate the influx of excessive nutrients in the system.

 

 In a nut shell, duckweed is present in water that has high levels of phosphorus and/or ammonia and unless it poses an operational problem it does not need to be removed.

 

clarifier duckweed duckweed

Another way to eliminate the growth of duckweed or algae in a pond is to add supplemental biological products to help degrade any organics in the system. These bacteria will grow and create a stronger biomass and thereby reduce the amount of food or nutrients available for the duckweed or algae and outcompete them.

primary duckweed duckweed

 

 

More Troubleshooting on Lagoonspapermill lagoon

Case history of a papermill using our Bioaugmentation Programs

 

More on Papermills with Duckweed:
Take a tour of a papermill
Industry Benchmarks
Clarification Optimization
Solids Handling in a Paper Mill
Learn how Environmental Leverage can help your plant

 

Troubleshooting Lagoon Systems
Beneficial Reuse
Filamentous bacteria can be a problem if solids are held too long in a clarifier also.
Total System Optimization- Case History
Solids handling and other papermill troubleshootingwaterfall
MicroSolv 118
Duckweed on Aeration lagoons
Wastewater in the Fall- Problems and Solutions
Bacteria for Wastewater Treatment
Microbial Products for Bioaugmentation and Bioengineering
Biological Products for use in Wastewater Applications for Bioengineering and Bioaugmentation
Biological Products, Descriptions,  Usage and Applications
Duckweed

 

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