Automatic Oxygen Flow Control for Wastewater Treatment
Integrated Engineers, Inc.
Automated Oxygen Flow Controller
(OFC)
Description / Function:
Provides automated oxygen flow control to maintain a user-set dissolved oxygen level in an aeration basin for industrial wastewater treatment.
Dissolved oxygen concentration measurements are taken using a luminescent dissolved oxygen sensor. This high tech sensor is unaffected by pH, hydrogen sulfide, heavy metals, wastewater chemicals, and organic buildup. Periodic wiping of the sensor face is all that is required for accurate operation. Frequent calibration is not required.
The dissolved oxygen level is transmitted to the process controller which compares the current dissolved oxygen level to a user preset level, and adjusts the output signal to the proportional flow control regulator. This regulator controls the flow of pure oxygen to the aerator in the aeration basin, thus adjusting the dissolved oxygen level to the set point. An inline flow meter can be used to monitor the oxygen usage rate.
Specifications:
- Unit and all components cleaned for oxygen service per CGA-4.1.
- Bronze/Brass/Aluminum/Stainless, components Type 304 Stainless Steel pipe
- Strut framework allows variable height installation of flow control piping
- Frame can be customized according to specific needs.
- Dissolved oxygen sensor is luminescent, non-flowing and stable.
- Digital sensor allows long-placing dissolved oxygen sensor up to 1,000’ from controller
- Nema 4X fiberglass enclosure with polycarbonate and stainless window kit.
- Oxygen process controller protected behind a polycarbonate window, extending life of controller
- Proportional oxygen flow control based on operator set
- Oxygen flow is controlled through built in PID or Linier control loops
- Manual override with direct proportional flow control
- Multi pressure variable area oxygen flow meter.
- Multiple flow rates available (see below)
- Indexed flow control valve for controlling maximum flow and span.
- Built in electronic data logger.
- Data can be retrieved wirelessly using infrared communication through window.
- Two separate inputs and outputs.
- Can be used for pH measurement along with dissolved oxygen levels, or to independently control the flow to two separate aerators from the same controller.
- 110 VAC 2 amp service required
- Optional RS238, or 484, for transmitting DO levels and remote set point adjustment on a computer network
- Flow ranges: 3-25 CFM, 10-100 CFM, or 25-250 CFM
