Municipal wastewater treatment plant

Expanding and Upgrading Existing Sewage Treatment 

MABR technology can be used to upgrade or increase the processing capacity of existing wastewater treatment plants. Pre-assembled MABR modules are installed in the biochemical tank to increase the biological treatment capacity, thereby increasing the scale of the treatment facility.

MABR Module

  1. MABR module is installed into the anoxic tank and aerobic tank to create an integrated sludge-MABR hybrid process that can drastically improve biomass retention, oxygen utilization rate, and biological treatment capacity.
  2. The MABR module dimensions and quantity are customized according to the tank specifications, treatment objective, and wastewater characteristics.

Advantages of Upgrading with MABR​

​By installing the MABR module into the existing wastewater infrastructure, the processing capacity of the primary biological reactor can generally increase by 20-30%.

The MABR technology presents several advantages:

  1. The MABR system has a high oxygen utilization rate and does not require any additional power supply; therefore, the change in the net energy consumption equals zero.
  2. No additional structures are required except for the MABR module and supporting pipes.
  3. Given that the membranes are not damaged, no special maintenance is required for the MABR due to the high tensile strength and the overall robustness of the hollow fiber membranes.
  4. Membrane modules are installed into existing pools and do not require additional land use or halting of the current operations.
  5. MABR process improves carbon utilization rate, therefore, reducing the cost of carbon supplementation.
  6. MABRs drastically reduce the system’s sludge production, which lowers the sludge handling and disposal costs. Decreasing the production of excess sludge reduces the overall operating cost associated with sludge handling, such as sludge press filtration.

 

Following the MABR upgrade, the operating costs incurred by the additional removal of COD, BOD, ammonium nitrogen, and total nitrogen, are effectively zero. Costs associated with total phosphorus removal will be based on the number of chemical treatment agents used. 

 

Factors Unfit for MABR Upgrade

  1. Reactors downstream of the primary biological treatment tanks such as sedimentation tanks, filtration tanks, and disinfection tanks generally do not possess sufficient upgrade room. It would require reconstruction.
  2. Underground sewage treatment plants or closed sewage treatment plants are highly challenging to construct and have high initial investment costs.