Bioloop oxidation ditch

Overview Specifications Industries & Applications Documentation & Tools
Overview

Overview

Product Features
  • Energy efficient – can cut energy costs by up to 50% compared to oxidation ditch technology with mechanical aeration
  • Removes total nitrogen and total phosphorus
  • Simple tank construction
  • Reduced electrical installation costs and footprint
  • Adaptable to a wide range of flow and loading conditions
  • Fine bubble diffused aeration does not produce aerosol material, unlike mechanical aerators
  • Can easily replace mechanical aeration in existing oxidation ditch plants
  • Process performance guarantee available

Simplified, flexible process with reduced installation and operational costs

Combining Sanitaire diffused aeration, Flygt submersible mixing and overall process application, as well as instrumentation and process control from Sanitaire and YSI in both new and retrofit applications, Xylem’s Sanitaire Bioloop oxidation ditch delivers up to 50% better energy efficiency, while remaining adaptable to a wide range of flow and loading conditions. The process can also be designed to remove total nitrogen and total phosphorus. 

Xylem’s experienced design team can put together an optimized, flexible solution suited to both current and future treatment needs. Best of all, the process comes standard with all the long-term support that customer's have come to expect from Xylem and can be provided with a process performance guarantee.

Bioloop was specifically designed to reduce installation costs. With its simple tank construction, the process doesn’t require extensive loadbearing platforms and walkways. Motors contained in the blower area reduce electrical installation costs and the tank depth is not limited by a mechanical aerator/mixing system. Using deeper tanks provides for optimal diffused aeration transfer efficiency, and reduces the overall system footprint as well.

The Bioloop oxidation ditch can be designed with separate anaerobic, anoxic and aerobic zones, or with Simultaneous Nitrification and Denitrification (SNDN). Either option provides flexibility to accomplish reliable treatment, including nitrogen and phosphorus removal. Gentle mixing without excessive velocities ensures optimal biological floc formation. Standby air is provided so that even with one blower out of service, full treatment capacity is maintained.

Bioloop versus mechanical aeration

Mechanically aerated ditches use surface mixing, requiring high horizontal velocity to maintain solids suspension. This consumes excessive power at low-flow conditions. Xylem's Bioloop oxidation ditch uses dedicated mixing and aeration devices to provide flexibility that mechanical aeration/mixing systems can’t match. Bioloop gently mixes from the bottom, utilizing full floor aeration coverage.

Mechanical aeration systems utilize intensive energy at the air/water interface to drive the air into the water. Xylem's Bioloop diffused aeration offers reduced aerosols, less icing and misting, and significantly reduces odors.

Xylem's Bioloop oxidation ditch delivers up to 50% energy savings compared to mechanical systems. Achieving 7-9 lb. O2/bHP-hr compared to 3.0-3.5 lb. O2/BHP-hr for mechanical aeration systems. Coupled with efficient Flygt submersible mixing technology, Bioloop addresses energy efficiency concerns.

Bioloop also utilizes non-corrosive, rugged in-basin components, including Sanitaire diffused aeration systems and Flygt submersible mixers and pumps, both of which have been installed and proven at thousands of treatment plants worldwide. Blower systems can be located inside a building, minimizing outside maintenance requirements. The entire aeration system is easy to install and maintain, eliminating the need for heavy-duty cranes for service.

The Bioloop oxidation ditch is also continuously optimized with the help of Xylem's OSCAR process performance optimizer. OSCAR matches the precise amount of energy consumption to the dynamic treatment need, ensuring that just the right amount of energy is used. In addition, advanced features such as automated sludge age control (SIMS), ammonia control, reporting tools, and SCADA are available as well.

Specifications

Specifications

General Information
Flow rate
Applications
Typical pretreatment
Available operating modes
Shop oxygen transfer test
Performance warranties
Bioloop oxidation ditch
0.1 to 100+ MGD (300 to 300,000+ m3/d) typical
Removal of BOD, TSS, Ammonia, TN, and TP
Coarse screen and grit removal
NIT (aerobic only), MLE (Modified Ludzack-Ettinger), A2O: anaerobic + anoxic + aerobic, Bardenpho (4 or 5 stage), Ditches in series (simultaneous nitrification and denitrification)
Included
Guarantees for effluent quality or energy consumption available
Decanter
Material of construction
Bioloop oxidation ditch
n/a
Instrumentation
DO sensor
TSS
WAS flow meter
Ammonia and nitrate sensors
Terminal / controller
ORP sensor
Bioloop oxidation ditch
YSI/WTW model FDO 700 IQ
YSI/WTW model ViSolid 700 IQ
YSI/WTW model ViSolid 700 IQ
YSI/WTW model VARiON Plus 700 IQ
YSI/WTW model 2020 IQ Sensor Net
YSI/WTW model
Aeration Equipment
Types of aeration equipment
Bioloop oxidation ditch
Typically includes Fine Bubble Aeration (Gold Series membrane diffusers or Silver Series II membrane disc diffusers); Coarse Bubble Aeration optional (Stainless steel wide band diffusers), Retrievable Grids optional (Eco-lift retrievable aeration gird)
Air Control Valves
Types of air control valves
Bioloop oxidation ditch
Wafer type butterfly valves with electric motor actuator typical
Submersible Mixers
Types of submersible mixers
Bioloop oxidation ditch
ANAEROBIC/ANOXIC ZONES: Flygt 4400, 4500, or 4600 Series; OXIDATION DITCH: Flygt 4530 or 4400 Series
Mixed Liquor Recycle Pumps
Types of mixed liquor recycle pumps
Bioloop oxidation ditch
Flygt PP Series wall pumps or Flygt submersible non-clog type
RAS/WAS Pumps
Types of RAS/WAS pumps
Bioloop oxidation ditch
Flygt submersible non-clog type
Controls, MCC, SCADA
Types of controls
Bioloop oxidation ditch
OSCAR process performance optimizer
Industries & Applications

Industries & Applications

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Mining & Quarrying / Aggregates > Production Water & Wastewater Reuse
Documentation & Tools

Documents