Lagoon Aeration System Design: Individual Air Lines vs. Fixed or Floating Laterals

lagoon laterals

A lagoon aeration system will require some method to convey air from the onshore blower to each aeration unit. Two distribution methods are typical: individual air lines or lagoon laterals, either submerged and fixed to the bottom; or floating on the surface.

In this article we’ll compare the benefits and drawbacks of individual air lines and lagoon laterals to help you to determine which method is best for your application.

Lagoon Individual Air Lines

lagoon laterals

Individual air lines bring air from the centralized blower to an onshore header and from there to each diffuser unit. These air lines are ballasted so they rest on the bottom of the lagoon. Valves are often used on the header end of individual air lines so that each aerator can be throttled down or turned off for maintenance.

Benefits of Individual Air Lines:

lagoon laterals

Lines are submerged: Very little of the air lines is exposed at the surface, and the air lines are both weather protected and out of the way at the bottom of the lagoon.

More control: With individual air lines, the system can be balanced and rebalanced from the shore. If an operator wants more air at one end of the lagoon, he or she can quickly make that happen. This is most beneficial in systems with variable airflow: The valves on each air line will allow for quick adjustment.

Less maintenance: Since individual air lines are mostly continuous runs of tubing and they are not on the surface of the lagoon, there are fewer joints and points of failure, reducing the potential for leakage.

Drawbacks of Individual Air Lines

The “spaghetti” effect: In applications with many closely packed aerators, individual air lines can begin to overlap or become tangled with other aerators. This can lead to a “bowl of spaghetti” effect that makes aerator handling difficult.

Cost: In applications with many aerators or in larger ponds, individual air lines can be more expensive than laterals.

Backpressure: Backpressure is a function of pipe diameter, airflow, and length. Since our air line comes in one size, applications with very long runs (over two hundred feet) and/or higher airflows will see a higher backpressure. This will raise brake horsepower and may also require larger blower sizing.

Subject to lagoon bottom conditions: With individual air lines, the aerators rest directly on the lagoon bottom. Depending on the quality of the lagoon’s construction, the aerators’ installation, and sludge levels, you may see a variation in aerator heights and levelness. Airflow will take the path of least resistance, favoring higher aerators. This can lead to an imbalance in air distribution in the lagoon, which can be solved by throttling down the higher aerators via the onshore valves until all aerators show an even bubble pattern.

Lagoon Laterals

Laterals are pipe or trunk lines that bring bulk air out into the lagoon. It’s called a lateral because it is a side offshoot of the header. Generally there are two approaches: 1) Fixed Laterals, which are submerged and attached to the bottom of the lagoon with concrete anchors; 2) Floating Laterals, which float on the surface of the water and are tethered to each end with cable to prevent them from blowing with the wind. Laterals tend to be used in larger applications (50+ aeration units) as they can save on equipment cost and make the system more maintainable.

Fixed Lagoon Laterals

lagoon laterals
lagoon laterals

Fixed laterals branch off a main header coming from the blower and go into the lagoon, intermittently anchored to concrete blocks. They can be made of Ductile Iron Pipe (DIP) or High Density Polyethylene (HDPE) pipe. Saddles located intermittently at the bottom provide a branch to each aerator. Typically, after the saddle there is a heavy flex air line that connects to the aerator with enough slack to allow the aerator to be pulled up to the surface for maintenance.

Benefits of Fixed Lagoon Laterals

Weather resistant: Fixed laterals are out of sight and out of mind. Rain, wind, hurricanes, and cold temperatures have no impact on operation.

Low maintenance: Because they are fixed, there is no tensioning of tether cables and no visible maintenance points during normal operation.

Easier aerator maintenance: Because they are submerged, maintenance crews can float freely on the surface of the water without having to avoid floating laterals that would otherwise be there.

Drawbacks of Fixed Lagoon Laterals

Lagoon downtime: To anchor a lateral to the bottom, the lagoon needs to be drained and taken out of service. In some circumstances, this is not an option.

More expensive: Due to the need to pump down the lagoon, deal with existing sludge on the bottom (remove or push around), and then bring in concrete and stainless strapping to anchor the pipe, fixed laterals are almost always more expensive to install.

Difficult maintenance: If there is a problem with the lateral, it is much harder to fix when it’s submerged on the bottom. The lagoon must be drained or divers will need to be sent down to fix it. Both are inconvenient and expensive options.

Susceptible to water ingress: Water can penetrate any aeration system given enough time. After installation, as air is introduced, water can sit in the laterals and delay or prevent the even distribution of air if the water isn’t completely pushed out. This can lead to dead zones in the lagoon.

Challenges with air balancing: As lagoon bottoms can vary in elevation, some aerators can end up being lower then others and, as a result, will receive more or less air. With fixed laterals it can be more difficult to adjust for these differences as you have to pull up an aerator and either add an orifice/valve to it or raise its elevation.

Floating Lagoon Laterals

lagoon laterals

Floating laterals, as the name suggests, branch off the header and float on the lagoon’s surface. They are constructed of HDPE material and are tethered on at least the ends by stainless steel aircraft cables. A tensioning system allows the tether to be tightened during the natural expansion and contraction that occur during seasonal temperature fluctuations. Floating laterals are widely used by manufacturers of fine bubble lagoon aeration systems and can be found in all 50 states and Canada.

Benefits of Floating Lagoon Laterals

Even air distribution: This is one of the biggest benefits of laterals. If the aerators are suspended from the lateral and do not touch the bottom, because the lateral itself is situated on a level surface (the surface of the water), all the aerators are at the same elevation beneath them.

Lower pressure: Larger pipes produce less backpressure, allowing more air to reach farther out into the lagoon and taking less of a toll on brake horsepower.

More efficient and economical for larger applications:  For very large lagoons where air needs to be delivered 500 feet or more from the main header, floating laterals can be upsized and run out relatively cost effectively, with only a few pipes. Compare this to running hundreds of feet of individual air line to dozens or hundreds of aerators.

No downtime: Floating lagoon laterals can be installed within a lagoon when it’s in service with no disruption.

Individual aerator adjustment: Each aerator can be installed with its own ball valve to balance airflow that can be adjusted from the surface.

Drawbacks of Floating Lagoon Laterals

Susceptible to weather issues: Inclement weather will affect the operation of the lateral. During high winds or hurricanes it can be severely damaged and make the repair or replacement of aerators difficult. During extreme cold, ice formation on the surface of the lagoon can interfere with the lateral and even cause breakage to the air line connections. Due to the lateral being exposed to the elements, wear and tear–including the tethering system and connections—is inevitable and will result in higher maintenance requirements.

Expansion and contraction concerns: HDPE expands and contracts substantially with changes in temperature, requiring the operator to adjust the tethers to maintain the proper tension. Laterals that get too loose will snake around the pond, leaving dead zones as the snaking brings suspended aerators with it, or dragging bottom-sitting aerators around with wind movement. Laterals with too much tension will increase the potential for lateral damage.

Not suitable for variable depth: Surface laterals with hanging aerators are not suitable for lagoons with a changing depth. As depths increase, the aeration depth stays the same, leaving the lower portions of the lagoon unoxygenated and undermixed. This can lead to both lack of treatment and sludge accumulation. If depths get too shallow, the aerator will run into accumulated sludge. In addition, the lateral would have to be properly tensioned or loosened as the lagoon depth changes.

Difficult individual aerator control: Although an aerator’s airflow is technically adjustable with a ball valve, it’s a difficult undertaking. It would require the operator to get on a boat and navigate around the laterals and support cables, then hand adjust each aerator. This lack of individual aerator control can lead to air distribution anomalies.

Choosing between Individual Air Lines and Lagoon Laterals

The best method for conveying air from the blower to the aerators is site- and installation-specific. Factors to consider are whether the lagoon bottom is accessible, the number and density of aeration units, the distance from the header to the lagoon, climate, and budget.

Triplepoint generally biases towards individual air lines on most applications, as operators seem to gravitate to their clean look, easy on-shore controls, ease of installation, low maintenance requirement, and protection from the elements. On applications with high pressure/airflow, lots of units, or significant budget constraints, we consider the implementation of laterals.

Need assistance with your lagoon aeration system design? Contact Triplepoint, the lagoon experts. We can help you design an efficient, cost-effective lagoon aeration system, and provide design calculations, budgetary and lifecycle costs, and preliminary layouts. Request a free, no obligation quote.

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Lagoon MBBR: Moving Bed Biofilm Reactors for Ammonia Removal

The lagoon MBBR, or moving bed biofilm reactor, is a proven technology for the removal of lagoon ammonia through biological nitrification. In this article, we’ll describe MBBR technology and how it’s been adapted for lagoon ammonia treatment. Then, we’ll explain how Triplepoint’s patented NitrOx® Process improves on the lagoon MBBR by adding a heating element to ensure year round nitrification in cold climates and show how an installation performed during the brutal Polar Vortex cold snap in January 2019.

lagoon mbbr

What Is an MBBR?

lagoon mbbr

MBBR stands for Moving Bed Biofilm Reactor: A tank or reactor houses loose plastic carrier pieces (also known as media) that provide a surface to which waste-consuming microorganisms can attach and grow, creating biofilm. This concentrated biomass provides high volume wastewater treatment in a small footprint.

An aeration grid at the bottom of the reactor keeps the media moving, suspended in the wastewater. The movement of the media in the wastewater keeps the bacteria in contact with the waste and keeps the growth in check by “cleaning” the media pieces as they bump into each other and the walls of the reactor.

Invented in Norway in the late 1980s, the MBBR has become a common wastewater treatment process, popular due to its compact size, ease of operation, and ability to adjust to varied flows and loadings.

Because an MBBR maximizes biological treatment by optimizing conditions for bacterial growth, it can be configured for a variety of applications: to provide single-or two stage BOD removal, nitrification, BOD and nitrification, or denitrification.

As a primary wastewater treatment process, an MBBR typically consists of two reactors or tanks, the first to treat BOD and the second to polish BOD and treat ammonia-nitrogen, followed by a clarifier to screen out solids.

A lagoon MBBR is a tertiary treatment process added to a lagoon system for the purpose of ammonia or nitrogen removal through biological nitrification or denitrification.

The Lagoon MBBR

A lagoon system can provide sufficient BOD treatment, so a lagoon MBBR is used solely for ammonia or nitrogen removal, preserving the existing infrastructure and ease of operation of the lagoon.

Removing lagoon ammonia through nitrification requires a specific set of conditions:

  1. Reduced BOD: BOD-removing heterotrophic bacteria outcompete nitrifying bacteria, so BOD levels must be reduced sufficiently to give nitrifiers a chance to work. Generally, a BOD level of 20–30 mg/L is required, a level most lagoons are able to achieve.
  2. Lagoon pH of 7.5–8.0: Lagoon nitrification is pH sensitive; ammonia treatment rates decline significantly at pH values below 6.8. Most municipal wastewater lagoons will naturally have a pH in this range.
  3. Adequate DO levels: Wastewater lagoon nitrification consumes large quantities of oxygen: 4.6 lbs of O2 per every pound of ammonia oxidized. In order for lagoon nitrification to occur, a working dissolved oxygen level of 3.0 mg/L is required and a DO level of 5.0 mg/L is optimal.
  4. Adequate mixing: Mixing is critical in order to bring the oxygen, nitrifiers and ammonia into contact with each other for efficient treatment. Moreover, without mixing, sludge can build up or short circuiting can occur.
  5. Biomass: Nitrifying bacteria are attached growth organisms, so they need surfaces to grow on. The more surface area is available, the more nitrifiers the system can cultivate. MBBR carrier media is designed to maximize the surface area on each plastic piece.
  6. Temperature: Nitrification slows as temperatures drop. The optimal range for lagoon nitrification is 82 to 97° Fahrenheit, which is clearly unrealistic for a wastewater lagoon. Acceptable rates of lagoon nitrification can be achieved at or above 68° F. Many lagoons can achieve reasonable ammonia removal during the summer but struggle in the winter, when nitrification slows or stops completely.

For more on lagoon ammonia and the key factors for nitrification, watch our You Tube video.

The lagoon MBBR optimizes most conditions for biological nitrification: It supports biomass with carrier media for nitrifying bacteria to grow on and it provides dissolved oxygen and mixing via an aeration grid. The biggest challenge is with temperature: Because the MBBR follows the lagoon, influent water temperatures can be too cold to support nitrification in winter.

Accounting for the Limitations of Lagoon MBBR Ammonia Treatment

How can a lagoon MBBR remove ammonia when the water is too cold for nitrification? One option is to increase the biomass. Increasing the amount of carrier media can increase nitrifying bacteria density by giving them more surfaces to attach to. The challenge is the amount of media required to compensate for the cold temperature and the size of the reactor needed to contain them. Adding hundreds of cubic feet of media can cost hundreds of thousands of dollars and require a basin the size of three or four football fields.

Triplepoint’s NitrOx Lagoon MBBR

Triplepoint’s patented NitrOx Process solves the temperature limitations of the lagoon MBBR by heating the reactor influent—only when needed and just enough to ensure biological nitrification. Because the temperature increase is minor, to a target between 36.5 and 41° F, and only required a few months per year, energy costs are kept to a minimum. Temperature is regulated automatically, too, preserving the ease of operation of the lagoon system.

NitrOx vs. the Polar Vortex

The NitrOx reactors sited behind an existing lagoon.

Following a successful pilot, the City of De Soto, Iowa, installed a full NitrOx system to upgrade their existing three-cell aerated lagoon with ammonia removal. Lack of available land was a challenge: the solution would have to have a small footprint and fit onto the existing site. The lagoon system’s current flow is just above 100,000 gpd, but the NitrOx was sized to treat up to 630,000 gpd to account for the community’s future growth.

Although De Soto’s lagoon system was achieving adequate nitrification during the summer, cold temperatures would put the city out of compliance during the cold winter months, unable to meet an ammonia effluent limit of below 5 mg/L. Since the NitrOx was installed, De Soto had been reliably meeting its ammonia limit. But how would it perform in a brutal cold snap?

Great, as it turns out. Despite three straight days of temperatures well below 0° Fahrenheit during the “Polar Vortex” of late January 2019 and influent ammonia of 16.9 mg/L, De Soto’s NitrOx system put out effluent ammonia below 0.10 mg/L, well under permit.

For more information about Triplepoint’s patented NitrOx lagoon MBBR for ammonia removal, download our brochure.

To learn about Triplepoint’s NitrOx+D lagoon MBBR, which adds an anoxic reactor for biological nitrogen removal at any temperature, download our brochure.

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Winery Pond Odor Control: A Case Study

winery lagoon

A winery pond or lagoon can be an ideal treatment option for process wastewater because it is relatively low-maintenance, sustainable, easy to operate, and cost-effective. A pond with sufficient capacity can easily cope with the peak loads and changes in influent volume and temperature common with winery wastewater.

Like municipal lagoons, however, a winery lagoon can emit unpleasant odors if dissolved oxygen levels are inadequate. In this article, we’ll review the characteristics of winery wastewater and why lagoon treatment can be a good option, then present a case study of a winery lagoon that added Triplepoint’s AeroHub fine bubble aeration to solve an odor issue.

Characteristics of Winery Wastewater: High BOD, Shock Loads

The manufacture of wine is a water-intensive process, with two to six gallons of water used in the creation of every gallon of finished product. Approximately 70 percent of the water utilized during the winemaking process becomes a wastewater byproduct. Winery wastewater is typically very high in BOD. Moreover, winery operations can suffer “slugs” of BOD coming from bad batches or accidental spills from time to time. Winemakers would undoubtedly prefer not to focus on wastewater, but it is a critical part of doing business. Insufficient wastewater treatment can cause permit violations and interruptions in production—both potentially costly outcomes.

Wastewater generated by a winery can be pure liquid Biological Oxygen Demand (BOD) from bottling side spillage, or can include solids like seeds, stalks, yeast, and sedimentation waste, which is expressed as Total Suspended Solids, or TSS. Washwater from the cleaning of floors, equipment, pipes, and vessels may contain cleaning chemicals that can disrupt the biological breakdown in a wastewater treatment process. Overall, wastewater from the production of wine is generally highly soluble biodegradable organic compounds.

Wastewater from the production of wine generally has a BOD from 300–3500 mg/L, but BOD can go as high as 12,000 mg/L during crush season, with a TSS from 10–800 mg/L.

In addition, production schedules vary—over the course of the day or seasonally with the vintage cycle—making it important for a winery’s wastewater system to be capable of adapting to inconsistent flows, including surges in volume and variations in influent strength and temperature.

Clearly, with these significant BOD and TSS levels and variable loading, effective and economical wastewater treatment can be challenging.

The Winery Pond

Wines & Vines Analytics, citing a study by UC Davis, says, “As water is expected to become even more costly and scarce in coming years, winery wastewater ponds may soon turn from an unsightly necessity to a helpful source of usable water.”

A winery pond provides the flexibility to cope with changes in flows and loadings, is economical to build and operate, and can treat BOD and TSS to a level sufficient to meet California’s Title 22 standards for beneficial reuse.

However, to ensure optimal treatment and odor control, aeration is key.

Winery Pond Case Study

Ste. Chapelle Winery in Caldwell, Idaho, installed an evaporative lagoon in March of 2017. Within the first six months of operation, the 300’ x 200’, 1.2 MG lagoon developed an odor problem, which was generating complaints from retail customers. An outdoor amphitheater for summer concerts was under construction, so unpleasant odors needed to be dealt with.

A high BOD load of 2100 mg/L was consuming all the oxygen in the water. Undigested process solids including grape pulp and skins became septic and released pungent odors. The lagoon had less than one foot of water depth and solids were building up around the inlet.

Triplepoint assessed the pond with the engineers and site management and determined that nearly five feet of available freeboard would support a higher water level in the lagoon. Triplepoint advised the winery that raising the water level to a minimum of 2.5 feet would allow an AeroHub fine bubble aeration system to be installed to maintain dissolved oxygen levels, digest volatile solids, and mitigate odors.

Twelve fine bubble AeroHub units, supplied by a single on-shore 10 hp three-phase Positive Displacement blower, were installed onto the lagoon floor by workers in hip waders. Irrigation water was used to fill the lagoon to the recommended minimum depth of 2.5 feet.

winery lagoon

The AeroHubs nestled into the process solids; significant surface foam demonstrated that the AeroHubs had begun immediately oxidizing the solids. After a couple of weeks of acclimation, the foam dissipated and the odors are under control.

Winery Pond Aeration

According to The Wine Institute’s Comprehensive Guide to Sustainable Management of Winery Water and Associated Energy: “A well designed aeration system for aerobic pond treatment of winery wastewater will prevent formation of nuisance sulfurous odors that would otherwise occur in a relatively short period of time, on the order of a few hours to a day.” Ensure your wastewater is well aerated—and odor-free—by adding one of Triplepoint’s lagoon aeration solutions.

Triplepoint’s MARS® aerator offers fine bubble aeration and coarse bubble mixing in a single, portable unit. Triplepoint’s AeroHub™ is a portable fine bubble aeration unit without mixing, ideal for shallower applications (like the Ste. Chapelle Winery lagoon) or when mixing is not desirable.

Whatever your application, we can help you design a pond aeration system to maximize treatment, mitigate odors, and improve energy efficiency. Send us your specs—we’d be happy to send you a no-obligation quote.

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Most-Viewed Lagoon Videos of 2018 from Triplepoint’s You Tube Channels

lagoon videos

Our previous blog highlights our most popular wastewater lagoon topics of 2018. Here you’ll find last year’s Top 10 most-viewed lagoon videos from our YouTube channels. Our TriplepointWater channel features case studies and product information. On our Lagoons Do It Better channel you’ll find educational videos and webinars on topics of interest to lagoon operators and engineers, plus interviews with industry experts. Subscribe to both and you’ll be first to know when we post something new! Continue reading

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Most Popular Lagoon Topics of 2018 from Triplepoint’s Blog

lagoon topics

Now that 2018 is coming to a close, let’s take a look back and see which lagoon topics resonated with our blog readers this year.

Lagoon Ammonia

Summer Ammonia Removal: Optimizing Warm-Weather Nitrification

summer ammonia removalSummer ammonia removal via nitrification is less of a challenge for lagoons than cold weather ammonia removal, as nitrifying bacteria are temperature sensitive and thrive in warmer water. The interplay between algae and bacteria, dissolved oxygen, pH, and temperature determines the pathway and rate of nitrification. Watch our video, 6 Key Factors for Nitrification, then read below for tips on how a lagoon can be optimized for summer ammonia removal. Continue reading…

Lagoon Odor

Wastewater Lagoon Odor Control for Spring Turnover

wastewater lagoon odor controlUnmixed lagoons turn over in the spring, so it’s also when operators (and local residents) are concerned about wastewater lagoon odor control. Although spring lagoon turnover and its accompanying odors may be normal and expected, that doesn’t mean they are tolerated. Here we explain what causes lagoons to turn over and what can be done to mitigate odor issues. Read more…

Smelly Lagoon? Diagnosing and Correcting Lagoon Odors

Smelly lagoons have created the perception that wastewater lagoons don’t work and should be replaced with mechanical plants. Triplepoint HQ is six miles as the crow flies from the Stickney (aka “Stinkney”) Water Reclamation District, which serves the Chicago area and is the world’s largest wastewater treatment plant. Our coworkers who live a little closer to the facility can tell you on certain days when the wind is blowing the wrong way, treatment plants smell! A properly functioning lagoon is for the most part free of objectionable odors; in fact, a smelly lagoon is announcing that it’s not working optimally.

In this video, Triplepoint’s Patrick Hill describes lagoon odors and what they mean and shares some options for correcting the conditions that cause odor. Watch the video and read below for highlights. Continue reading…


Lagoon Aeration and Optimization

Lagoon surface aerator: “A self-destructing piece of equipment”

lagoon surface aeratorThe winter of 2017–18 is already one for the books, with record cold temperatures in the Midwest and eastern U.S., and snow as far south as Florida. So far, most of the western U.S. has enjoyed relatively mild conditions, but there’s still a couple of months of winter left to go.

In a previous blog, Is Your Wastewater Lagoon Ready for Winter? Prepping for Cold Temperatures, we described the effect of cold temperatures on biological processes. In this article, we’ll discuss the downside of lagoon surface aerators, which are particularly vulnerable to freezing temperatures. Continue reading..,

Aerated Lagoon Optimization to Reduce Energy Consumption

lagoon topicsEnergy costs for aeration represent the largest expense for a wastewater lagoon facility, so any increase in efficiency directly improves the bottom line. Since aeration systems are designed to be efficient at the lagoon’s full design capacity, they can be inefficient and wasteful at actual flow and BOD levels. In this article, we’ll outline why a lagoon facility can end up significantly overbuilt, and present methods of aerated lagoon optimization to save energy costs. Continue reading…

Lagoon Aeration System Design: Calculations and Common Pitfalls

To ensure wastewater treatment objectives are met, a lagoon aeration system design must be customized for its specific application.

In this video, Patrick Hill outlines the facility details we use to calculate aeration requirements and customize a lagoon aeration system design. He’ll also review common pitfalls and often-overlooked factors that can result in insufficient treatment. Watch the video on our Triplepoint You Tube channel and read on for highlights.

Lagoon Hydraulics: Diagnosing and Preventing Short-Circuiting

“Short-circuiting is the greatest deterrent to consistent pond performance. The importance of the hydraulic design of a pond system cannot be overemphasized.” That’s a quote from the EPA’s lagoon manual, Principles of Design and Operations of Wastewater Treatment Pond Systems for Plant Operators, Engineers, and Managers.

Short-circuiting occurs when wastewater flows through the lagoon unevenly, allowing some of the influent to take a short cut through the cell and bypass the treatment process. Since adequate retention time is critical to lagoon treatment, anything that shortens retention time can result in high BOD and TSS in effluent. In this article, we’ll describe the ways lagoon hydraulics can contribute to short-circuiting, how to diagnose it, and how it can be prevented. Continue reading…

Other Lagoon Topics

Land Application of Lagoon Effluent: Pros and Cons

Land application is the most common disposal method for treated wastewater in the U.S., and the preferred method in many states. Land applying effluent can reduce demand for fresh water, provide nutrients to soil, and keep potential contaminants out of waterways. For lagoons, it may also be a way to avoid having to meet ammonia discharge limits. Watch our video on the pros and cons of land application for lagoon effluent and read on for highlights.

Frac Ponds: Treating Hydraulic Fracturing Wastewater for Reuse

frac pondsHydraulic fracturing, or fracking, is the process of injecting pressurized water, chemicals, and sand into the ground to extract shale oil and natural gas. While fracking has transformed energy production in the U.S., it requires a lot of water and thus creates a lot of wastewater, which must be treated and disposed of safely. In this video interview, Triplepoint’s resident expert, western regional manager Tom Daugherty, gives the lowdown on fracking wastewater and how frac ponds can be economically upgraded with MARS aeration. Read on for highlights and links to more information.

Duckweed Control in Wastewater Lagoons

Duckweed, or water lens, is a rapidly growing, invasive aquatic plant that thrives in wastewater lagoons due to the presence of ammonia and phosphorus, which act as fertilizer. Since summertime is high season for lagoon duckweed, it’s a good time to revisit the topic—what duckweed is and what it does, and review some methods of duckweed control. Continue reading…

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Diagnosing and Correcting Nutrient Deficiency in Industrial Lagoons

Nutrient deficiency, or the lack of sufficient levels of ammonia and phosphorus, can prevent an industrial wastewater lagoon from removing BOD adequately. In this episode of LDIB-TV, our own Julie Hartwig explains how to diagnose and correct industrial lagoon nutrient deficiency.

This video is the first presented by Julie Hartwig, Triplepoint’s Regional Sales Manager for eastern and southern states. She has a BS in Civil Engineering from the University of Illinois at Urbana-Champaign and recently earned her master’s in Environmental Engineering from Penn State. Formerly a water and wastewater treatment rep for a major water technology company, Julie has extensive experience working with industrial manufacturing and food & beverage facilities. Watch the video and read on for highlights. Continue reading

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Winter Lagoon Optimization: Preparing for Cold Weather

winter lagoon optimization

Water temperature affects virtually every aspect of wastewater lagoon performance. As lagoon expert Steve Harris states in his operators’ guide, Wastewater Lagoon Troubleshooting, “Water temperature is a reliable predictor of water quality and can aid the operator in preparing for changes in pond performance.” In this article, we’ll review the effects of cold temperatures on a lagoon and highlight methods of winter lagoon optimization. Continue reading

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Lagoon Aeration Retrofit: A Video Lagoon Case Study

A lagoon aeration retrofit can improve treatment and save thousands of dollars in energy, operations, and maintenance costs. Replacing a coarse bubble aeration system with MARS aeration maintains the mixing performance of coarse bubbles and combines it with fine bubble oxygen transfer efficiency to maximize lagoon treatment.

Because MARS aerators are portable, the retrofit can be completed with minimal operational disruption and leverage the existing blower and header infrastructure. La Grande, Oregon, installed a MARS aeration system in just two days and got their system back in compliance.

Watch our video case study and read below for highlights. Continue reading

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Efficient Lagoon Aeration: The AeroHub Fine Bubble Lagoon Aerator

aerohub lagoon aerator

Fine bubble aeration is a popular method of lagoon-based wastewater treatment due to its superior oxygen transfer efficiency. Our MARS aerator adds a coarse bubble static tube to fine bubble diffusers to combine that oxygenation efficiency with turbulent mixing.

Sometimes, though, lagoon mixing isn’t necessary or desirable. For that reason we’ve developed the AeroHub Fine Bubble Lagoon Aerator, an efficient fine bubble only aerator that provides the benefits of fine bubble lagoon aeration while eliminating many of its drawbacks.

Read on to learn the benefits of fine bubble lagoon aeration and how to determine when the AeroHub is the best aeration technology for a particular application. Continue reading

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Preventing Fall Lagoon Odor Caused by Seasonal Turnover

fall lagoon odorOctober is here—time for football, apple cider, falling leaves, and seasonal lagoon turnover. Although less extreme than the spring transition, autumn’s cooler temperatures cause destratification and may trigger lagoon turnover and corresponding odors. In this short article, we’ll talk about the causes of fall lagoon odor and how to prevent it. Continue reading

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