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Municipal Bio Circle

Aeration upgrade

Upgrading Kfar Tavor’s municipal Bio-circle wastewater treatment plant with Mapal’s drop-in, retrievable, fine-bubble aeration technology.

The municipal Bio-circle wastewater treatment plant in Kfar Tavor (northern Israel) struggled to meet effluent quality standards due to a failing old disc diffuser aeration system. The plant required an immediate and cost-effective solution that could be implemented rapidly without extended downtime. Mapal Aeration Solutions designed and installed a retrievable tubular fine-bubble aeration system tailored to the process’s biological oxygen demand.

Challenge

The existing floor-mounted disc diffusers were damaged and non-functional.
The plant consistently failed to meet effluent discharge requirements.
Extended shutdowns or complete reconstruction would have been costly and environmentally risky.

Solution

The project was executed through the design and manufacture of a drop-in, retrievable tubular diffuser system, engineered to deliver the precise airflow required for sustaining the biological process. Installation was carried out with exceptional speed: the reactor was emptied, the old floor-mounted disc diffusers were dismantled, and Mapal’s retrievable fine-bubble aeration system was installed directly on the reactor floor. The entire reactor upgrade was completed within just five hours, ensuring minimal disruption and immediate restoration of effective treatment.

Results

Significant Performance Improvement:

COD levels decreased from ~659 mg/L (average before) to ~83 mg/L (average after).
Total Nitrogen (TN) reduced from ~69 mg/L to ~24 mg/L.
Improved stability with reduced fluctuations across all parameters.

Operational Continuity: The plant was functional again within several hours.

Economic & Environmental Impact:

Avoided heavy investment in complete plant reconstruction.
Long-term savings in energy and maintenance costs.
Reduced carbon footprint through more efficient aeration.

This case demonstrates how Mapal’s retrievable fine-bubble aeration technology provides municipalities with a reliable, rapid, and cost-effective solution for upgrading aging treatment plants to meet strict environmental regulations.