Anoxic Selectors

Anoxic selectors facilitate denitrification in activated sludge processes for municipal or industrial wastewater treatment plants to remove nitrate prior to discharge into the environment. For optimal denitrification, it is vital to provide proper mixing of wastewater flow and return streams, maintain solids in suspension, and not impart measurable oxygen. A BioMix Compressed Gas Mixing System accomplishes these objectives using a fraction of the energy required by mechanical mixers.

Additionally, the BioCycle-ENR Activated Sludge Process and FlexZone Adaptive Process Volume System are ideally suited for municipal and industrial secondary treatment processes with anoxic selectors. The technologies are extremely effective for plants that are underloaded compared to design, or plants with wide diurnal variations.

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“By opting for anoxic selectors… we can mix the selectors with BioMix without creating dissolved oxygen, which allows the anoxic zone to operate properly and produce high quality effluent.” Greg H. – South Carolina WWTP

“We found a lot of value in the BioMix system, and EnviroMix offers great support… I can’t say enough about that!” Matt B. – New Hampshire WWTP

Advantages

Scroll through the tabs to learn about the application-specific advantages of each technology.

BioMix

FlexZone

BioCycle-ENR

	Energy Efficiency 50-60% or greater energy savings compared to mechanical mixing
	Straightforward Operation No mechanical or electrical components in the wastewater Greatly reduced amount of operating equipment to be maintained Non-clogging, self-cleaning components in tank 100% redundancy with standby compressor Optional PLC backup with Zombie^® controller
	Process Optimization Complete mixing with proven negligible oxygen transfer Guaranteed uniform mixing with onsite performance testing
	Unparalleled Flexibility Patented nozzles and headers are able to accommodate multiple applications, leveraging common compressors and controls Variable mixing intensity based on process parameters

	Unparalleled Flexibility Adjusts the bioreactor between anoxic, low DO, and aerobic environments in real time Can be designed for greenfield treatment facilities or integrated into facility upgrades utilizing existing equipment
	Energy Efficiency Delivers up to 50% energy savings during periods of low loading by turning off unnecessary aeration and enabling mixing Provides the ideal blend of oxygen delivery and mixing without over-aeration
	Straightforward Operation Dynamic process volume control, eliminating the need for fixed process volumes segregated by baffle walls No mechanical or electrical components in the wastewater
	Process Optimization Matches the volumetric process environment to influent flow, load, and temperature changes Improves carbon management and optimizes current and future nutrient removal

	Process Optimization Matches the anoxic, aerobic and low DO volumes to changing influent flow, load, and temperature Improves carbon management and optimizes current and future nutrient removal Enhanced phosphorus removal and reduced chemicals for phosphorus precipitation
	Unparalleled Flexibility Optimizes a variety of proven activated sludge processes — such as MLE, A2O, and others Can be designed for greenfield treatment facilities or integrated into facility upgrades utilizing existing equipment
	Energy Efficiency Delivers up to 50% energy savings during periods of low loading by turning off unnecessary aeration and enabling mixing Matches the aeration and mixing needs of the facility whether it is year one or year twenty
	Straightforward Operation Dynamic process volume control, eliminating the need for fixed process volumes segregated by baffle walls No mechanical or electrical components in the wastewater