Maynilad implements measures to address algae bloom

Catherine Talavera - The Philippine Star

MANILA, Philippines — West zone concessionaire Maynilad Water Services Inc. is taking steps to manage the impact of the algal bloom in Laguna de Bay on its water production at the Putatan Water Treatment Plants (PWTP).

In a statement over the weekend, Maynilad said among the solutions being implemented are the dosing of treatment chemicals to control algal buildup, utilization of a silt curtain to minimize algae intrusion into Maynilad’s treatment facilities, and cleanup of the dissolved air flotation treatment process of the PWTPs.

As part of medium and long-term interventions, Maynilad said it would dredge a portion of the lake encompassed by its silt curtain and install several units of ultrasonic algae control equipment around the PWTPs.

In June 2019, Maynilad’s water production was affected by an algal bloom in Laguna de Bay when the maximum algal bio count reached 13,230 counts per milliliter.

“While the company has since invested in additional treatment technology to address algae proliferation, it was still constrained to reduce production this time around as the algal biocount this month reached an unprecedented peak of 72,722 counts per milliliter,” the concessionaire said.

Algal blooms arise from shifts in the nutrient balance of the lake water resulting from chemical, industrial and agricultural waste or leachates.

“Though Maynilad has been pouring investments in treatment technology upgrades and interventions, its water production will continue to be affected unless more drastic measures are taken to protect Laguna Lake,” the company said.

“This is why the company has been working closely with various stakeholders and seeks to ensure the lake’s sustainability as a source of drinking water,” Maynilad added.

In a meeting with the Metropolitan Waterworks and Sewerage System on June 9, Maynilad said water service interruptions had to be implemented in the southern part of the west zone due to reduced water production because of high algal count in Laguna de Bay.

Maynilad is the largest private water concessionaire in the country, serving over 1.4 million customers.

It serves the areas of Caloocan, Pasay, Parañaque, Las Piñas, Malabon, Muntinlupa, Navotas and Valenzuela as well as portions of Makati, Manila, Quezon City and Cavite.


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