Lemna Environmental Technologies, Inc. (LET)
For over 40 years, Lemna Environmental Technologies, Inc. has been the trusted expert in lagoon wastewater treatment technologies and design. Recognized as the market leader in lagoon based process technology and cover systems, LET’s expertise encompasses all aspects of wastewater project development from conceptual design to final commissioning and ongoing customer support. Our mission is to provide innovative and cost effective wastewater treatment solutions that enable municipal and industrial clients to protect water resources now and for the future. We deliver on this mission through design expertise and a full product line that address the multiple needs municipalities, engineers and contractors have for wastewater treatment. With over 40 years of experience, we have earned a solid reputation for superior customer service and the ability to provide economical solutions tailored to fit our client’s specific needs.
Company details
Find locations served, office locations and our distributors
- Business Type:
- Manufacturer
- Industry Type:
- Water Treatment
- Market Focus:
- Globally (various continents)
About Us
LET’s commitment to the advancement of lagoon wastewater technologies directly impacts the way we we do business and deliver solutions to our various clients.
Meeting Every Wastewater Treatment Challenge From Influent To Effluent
Lemna Environmental Technologies, Inc. (LET) is the leading provider of innovative design and affordable wastewater solutions for municipal and industrial clients. We move customers from concept to commission with a turnkey approach that includes:
Innovative Technology
State-of-the-art engineering to deliver LET’s innovative treatment solutions
Customized Experience
Customized products and services to meet every treatment challenge
Environmentally Conscious
Design solutions that protect the environment while providing significant cost savings
Providing Wastewater Treatment Solutions to Facilities of All Sizes
Lemna Technologies works with wastewater treatment municipalities and industries to create plans and provide products that keep your community and the environment safe. Whether you’re in need of new construction or retrofits to existing systems, Lemna Tech has you covered.
Small Communities Need Reliable Wastewater Treatment Solutions
LET supports small to mid-sized municipalities with wastewater treatment products and processes that are both affordable and innovative.
As effluent water quality regulations have become increasingly stringent, LET has developed unique treatment processes capable of achieving year-round effluent limits as low as 10 mg/l BOD, 10 mg/l TSS and 2 mg/l NH3-N at a fraction of the cost of other traditional wastewater treatment systems.
Innovative Ideas and Products That Wastewater Industries Trust
LET supports multiple industries by providing innovative wastewater treatments and processes that address critical environmental needs.
We design low maintenance wastewater treatment systems that address the essential tertiary effluent requirements such as BOD, TSS, ammonia and phosphorus removal. By delivering comprehensive wastewater engineering, project management and installation services, we are able to serve an ever-growing number of sectors in the industrial market including agricultural, chemical, energy, manufacturing, food and beverage.
Milestones
1983
Lemna is founded in Minnesota to create cost-effective, operator-friendly wastewater treatment systems for communities and industrial clients.
1984
Lemna patents unique duckweed process that uses tiny aquatic plants that naturally treat wastewater by removing nutrients.
1985
Barrier grid is created to reduce wind and wave action and allow for full coverage of Lemna plants on treatment lagoons.
1992
Lemna expands lagoon treatment technology by introducing aeration and mixing into design of systems, enabling better BOD, TSS and ammonia treatment.
1996
Lemna introduces the LemTec Modular Insulated Cover, designed to provide heat retention, odor control, evaporation reduction and eliminated algae growth.
LemTec tradeshow computer graphic illustration of the biological treatment process involving a treatment pond making use of baffle systems for filtering contaminants
1997
Lemna develops the LemTec Biological Treatment Process (LBTP) for lagoon systems, which integrates technology to remove BOD, TSS and ammonia.
1998
The first aerated, covered lagoon is installed, incorporating the LBTP to address nitrification and ammonia treatment in cold climates.
2002
LemTec Gas Collection Covers are created to provide the ultimate solution for applications requiring complete containment and collection.
2005
Lemna introduces the LemTec Polishing Reactor (LPR), an attached-growth reactor providing supplemental BOD removal and ammonia nitrogen (NH3-N) polishing.
2007
Lemna develops solution for phosphorus removal, employing a chemical dosing system, low horsepower pumps and mixers that can be incorporated into the LBTP.
2010
Lemna introduces Hexa-Cover into the US market, a segmented system that adapts to any pond or tank application.
2014
Lemna comes under new ownership and becomes Lemna Environmental Technologies, Inc. (LET).
2015
LET moves from Minneapolis to Vadnais Heights, Minnesota, to upgrade the design offices and expand the production facility.
2016
LET Recirculating Sand Filter added to arsenal of innovative technologies, achieving exceptional nutrient removal as part of a process or tertiary treatment
2017
Introduced the Advanced Integrated Lagoon Technologies (AILT) concept as our comprehensive method to designing optimal, objective-based solutions.
Values
Our Mission
Provide innovative and cost-effective wastewater treatment solutions that enable municipal and industrial clients to protect water resources now and for the future.
Service
We focus on the success of our client’s projects by embracing a sense of urgency and attention to detail to generate the greatest value for our customers.
Growth
We encourage innovation, accountability, and personal growth by embracing new ideas, aligning development with goals, and providing an environment for feedback and knowledge sharing.
Environment
We seek opportunities to positively affect the environment by practicing the philosophy of rethink, reduce, reuse, and recycle, and by supporting causes aligned with our mission.
Circle of Innovation
This “Circle of Innovation” allows for continuous feedback throughout the development process, which enables LET to bring the most reliable, cost-effective technological advancements in lagoon-based wastewater technologies to the market.
This seamless approach allows for continual feedback, allowing each step of the process to advance and grow. The introduction of the “Circle of Innovation” to our team has created a culture at LET that promotes new ideas and creative thinking. The end result is improved customer satisfaction and a cleaner environment that will benefit generations to come.
Once implemented, our cutting-edge technologies provide the framework for our Gathering Process to create LET’s next generation lagoon advancements.
The data analysis process allows LET to design, test and redesign our innovations in technology, delivering unparalleled performance, reliability and affordability.
Our comprehensive Gathering Process, using data from 300+ facilities and pilot plants, allows LET to continually improve process design, technologies and capabilities.
Compiling analysis and research from the wealth of data ammassed in our Gathering Process allows LET to make immediate advancements in our treatment process designs.
Markets Overview
LET provides municipalities and industries with innovative wastewater solutions, including new construction and retrofits to existing systems.
LET’s innovative wastewater treatment solutions offer the following advantages to municipal and industrial clients:
- Low Capital Costs: Within certain size and effluent ranges, LET’s solutions are frequently the lowest capital cost options of any other technology for new construction or retrofits.
- Low Operational Cost: Due to the absence of sophisticated systems, equipment, and daily sludge disposal, LET represents the lowest operational cost option on the market.
- High-Quality Effluent: LET’s proven technology meets even the most stringent effluent standards.
- Ease of Operation: Since there are no complex operating parameters to monitor and adjust and no complicated sludge processing, lower-skilled operators are sufficient for effective operations.
- Reduced Footprint: The area required for effective treatment is dramatically reduced because of the accelerated nature of our designs. This results in a reduction of land use, basin sizes, and overall capital cost.
- Covered System Advantages: We offer many advantages over other systems, including the ability to nitrify and reduce ammonia year-round, algae reduction, evaporation control, and odor control. Our systems maintain higher temperatures than our competitors, accelerating treatment kinetics.
- Reduced Sludge Handling: Since all our systems are designed to accommodate the accumulated sludge, sludge disposal is only necessary every five to twelve years, though actual time may vary due to client requirements. Compared to other systems where daily sludge handling is required, LET systems are easier and less costly to operate.
- Flexibility: We provide a competitive solution for most municipal, industrial, new construction, or retrofit applications. The reliability and stability of the process allows for hydraulic loading variations, temperature fluctuations and organic surges more effectively than other technologies.
- Expandability: Often times, our design can be expanded in the future to allow to accommodate increased flow or more stringent effluent standards with a minimal amount of capital cost. Other systems typically cannot expand without major capital outlays.
Industrial Market
Delivering the Wastewater Solutions That Industries Trust
LET supports multiple industries by providing innovative wastewater treatments and processes that address critical environmental needs. LET offers a variety of innovative and low maintenance solutions for heat retention, odor control and bio-gas collection.
In addition, we can design complete wastewater treatment systems that address the essential tertiary effluent requirements such as BOD, TSS, ammonia and phosphorus removal. By delivering comprehensive wastewater engineering, project management and installation services, we are able to serve an ever-growing number of sectors in the industrial market including agricultural, chemical, energy, manufacturing, food and beverage. LET engineers design each industrial solution for the specific requirements of our clients, taking into account the many variables in industrial wastewater treatment. Every system is custom designed to meet the unique needs of our customers.
Municipal Market
Wastewater Solutions for Small Communities
LET supports small to mid-sized municipalities with wastewater treatment products and processes that are both affordable and innovative.
Our expertise is providing turnkey wastewater engineering design and installation services that meet the specific needs of our municipal clients.
As effluent water quality regulations have become increasingly stringent, LET has developed unique treatment processes capable of achieving year-round effluent limits as low as 10 mg/l BOD, 10 mg/l TSS and 2 mg/l NH3-N at a fraction of the cost of other traditional wastewater treatment systems.
With a reduced footprint, guaranteed reliability, and simple operations, we provide the highest performance lagoon-based treatment systems in the world. Our solutions for the municipal market offer numerous advantages over other systems, including lower capital and operating costs, expandability and low maintenance. LET’s process expertise and full line of products meet the needs of the municipal market—whether the requirement is an upgrade to an existing wastewater treatment plant or a new facility.