MIXING LIMITED TANKS Previous AEROBIC DIGESTERS / AERATED SLUDGE TANKS ANAEROBIC DIGESTERS BNR SELECTORS CHANNELS CHLORINE CONTACT TANKS Next In aerobic tanks, the aeration equipment is designed to both deliver oxygen and mix the contents of the basin. When more air is required to mix the basin contents than is needed to satisfy the oxygen demand, the conditions are referred to as mixing limited. Decoupling oxygen demand from mixing requirements provides the operational flexibility to reduce the airflow rate to meet the oxygen required for plant loading. A BioMix Compressed Gas Mixing System can be interlaced with diffused aeration grids, allowing simultaneous operation and eliminating over-aeration — an outcome no mechanical mixing device can provide. This results in BNR process control benefits and significant energy savings. APPLICATION SHEET CAUSES & SOLUTIONS What causes mixing limited conditions? Underloading compared to design conditions Daily or seasonal load fluctuations Hydraulic limitations that prevent taking trains out of service Oxygen demand that is diminished by upstream aerobic zones How does excessive aeration impact a treatment plant? Residual dissolved oxygen in RAS and mixed liquor return that inhibit BNR Poor settling Excess treatment chemicals in post-anoxic zones Wasted energy Why is BioMix the right solution? The requirement for the aeration system to provide the air necessary to meet the process oxygen demand and the mixing air demand can be eliminated by decoupling oxygen demand from mixing requirements, thus providing the operational flexibility to reduce the airflow rate to meet the air required for just the plant loading. A BioMix Compressed Gas Mixing System can be interlaced with diffused aeration grids to provide mixing, allowing simultaneous operation with the aeration system at low aeration rates or independent operation. This results in: Promotion of anoxic and anaerobic conditions to enable BNR Elimination of high dissolved oxygen in IMLR Conditions that promote good settling in secondary clarifiers Stable dissolved oxygen profile throughout the aeration tank Significant energy savings RESOURCES Application Sheet: Mixing Limited Aeration Product Brochure: BioMix Compressed Gas Mixing System Case Study: BioMix Selected for Norfolk, VA Case Study: BioMix Selected for Exeter, NH P: 843.573.7510 F: 843.573.7531 sales@enviro-mix.com © EnviroMix, Inc. 2020 About Technology Applications Resources News Contact Privacy Policy

RESOURCES Previous PRODUCT BROCHURES APPLICATION SHEETS CASE STUDIES ARTICLES & PAPERS Next FILTERS 10 RESULTS CLEAR P: 843.573.7510 F: 843.573.7531 sales@enviro-mix.com © EnviroMix, Inc. 2020 About Technology Applications Resources News Contact Privacy Policy