Eliminate Nuisance Bugs
Red worms thrive in sludge that builds up below aerators.
Masses of red worms congregating at the bottom of a drained aeration basin.
The coating on this clarifier rake are typical red worm cocoons. When scraped, masses of red worms will emerge.
Disc filter media is one of many spots midge flies can burrow in and multiply.
AQUABACxt is a highly effective, US EPA-registered biological larvicide. It contains a species of bacteria called bacillus thuringiensis (BT), an approved larvicide for controlling red worms and midge flies in wastewater treatment plants.
Red worms find wastewater plants to be a perfect home. They survive by eating your MLSS, then hatch into midge flies and the cycle repeats. The active ingredient in AQUABACxt kills the red worms and breaks this cycle.
AQUABACxt stands out in the market as it contains 6 complex biological larvicide compounds (called endotoxins) that are highly effective against red worms but safe for fish, birds, mammals, and other lifeforms. With 6 endotoxins, it is difficult for red worms to build a resistance, giving it an advantage over single endotoxin larvicides like Strike™.
Common symptoms of red worm infestations include: disappearing MLSS (the red worms are eating it), stringy or clumpy return activated sludge, and nuisance flies that attract pests. AQUABACxt is safe to use and will only kill a very narrow set of target species; larvae of the mosquito, midge flies, and black flies. It will not cause effluent toxicity issues.
Midge Fly Impact on Wastewater
Midge flies, or chironomids (Chironomidae), commonly occur in wastewater treatment plants and pond systems. The red worm that forms the midge loves the nutrient-rich conditions in a wastewater treatment plant and feeds off bacteria and sludge. The worms will eat mixed liquor and once transformed into adults, clog filters and buildings entrances. Some operators have told us they couldn’t see past their hand in some buildings.
Red worms, also called blood worms, are found in mixed liquor. Over a period of ten days the eggs hatch into red worms and then pass through the pupa stage to become adult midge flies. With no aquatic life to feed on the midges, their life cycle runs uninterrupted, and they multiply fast. If left alone midge flies will cause poor settling, high TSS, and disrupt the bacterial environment. Mixed liquor infested by red worms can see reduced solids, stringy or clumpy sludge, and poor nutrient removal. Not to mention the midge flies are a nuisance that attracts birds and spiders.
*There is no LC50 for aquatic organisms except for mosquito larvae. All other organisms except nuisance flies and midges Psychoda, Chironomus, and Chironomine are not affected by the product. Minnows, fish, Daphnia, and even other aquatic insects can’t be killed by the active ingredient in the formulation. AQUABACxt is specific to mosquito, blackfly, and midge larvae and again is not toxic to anything in the application sites except the larvae of these targets. The LC50 against susceptible mosquito larvae averages 0.15 micrograms per milliliter
Not registered for use in the state of New York.
AQUABACxt is a highly effective, US EPA-registered biological larvicide, but to work it must be able to reach the red worms. This is where Lar-V-Zyme comes in to aid the larvicide. Red worms will use BOD to build protective cocoons around themselves, which AQUABACxt cannot penetrate. Lar-V-Zyme is a biocatalyst that specializes in dissolving tough forms of undigested BOD. Larva-Zyme is able to easily degrade the red worm cocoons so that the AQUABACxt can fully reach the red worms.
Applications and Benefits
- Wastewater plants
- Pond systems
- Drain lines
- Kills red worms and resulting midge flies
- Stops red worms from eating MLSS
- Bacterial based
Case Study – UV Disinfection Room
A 6.5 MGD wastewater treatment plant in Wisconsin was dealing with a UV disinfection room that was always covered in midge flies. The operators were constantly cleaning the room and had installed bug zappers to try and control them. Unfortunately killing the flies did no good as new ones were constantly developing in the clarifiers.
They began using our AQUABACxt to rid their system of red worms at the source without harming the good bacteria and Larva-Zyme to degrade the protective cocoons.
This combination was very effective and now they have a UV building that’s not a nightmare to spend time in.
AQUABACxt – Midge Flies
A 3MGD wastewater treatment plant in Wisconsin had an issue with blood worms and the resulting midge flies in their Hydrotech disc filters. The filters were filled with worms and it got worse every day.
They added a large amount of our AQUABACxt for Midge Flies before the filters and at the clarifiers.
This took them out with one shot, and they now add a little every year to keep the midges flies out.