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Dow Fine Particle Filter Proves Effective Across Applications

Dow TEQUATIC PLUS filterA tobacco facility and a pulp and paper manufacturer are among the Dow Chemical Company customers in China treating difficult water using the Tequatic Plus fine particle filter from Dow Water & Process Solutions.

The Tequatic Plus filter combines continuous cleaning, cross-flow filtration with centrifugal separation and solids collection into one device. Unlike other technologies, the filter allows customers to across different industries to filter high and variable solids while achieving a water recovery that’s typically 99 percent or more, Dow says.

Applications include industrial wastewater treatment and reuse, produced water for oil and gas, desalination and industrial water treatment. Vertical markets range from food and beverage and pulp and paper to textile and laundry.

For example, a tobacco facility in Guangdong, China, implemented Tequatic Plus filter, fitted with a 30-micron screen, upstream of the vacuum plate filter to help recover tobacco fibers prior to wastewater discharge. The facility was experiencing high operating expenses due to fiber losses of more than 50 percent, increased wastewater treatment costs due to high fiber and total suspended solids (TSS) content, and energy loss due to hot water discharge.


  • Recovery of fiber greater than 80 percent, a 30 percent improvement
  • Reduced cost of wastewater treatment and energy
  • Reduced maintenance of downstream assets

Another customer in Shandong, China, when using press filters to treat water containing high TSS levels, a was experiencing fermentation solids losses in liquid purification from wine and high operating costs. To solve this issue, it installed a Tequatic Plus filter, fitted with a 30-micron screen.


  • Recovery of valuable particles and therefore, minimized plant expenses

After experiencing low fiber recovery and fouling of downstream assets in water containing TSS levels of 1,200 mg/L, a pulp and paper manufacturer in Jiangsu, China added the Tequatic Plus filter, fitted with a 30-micron screen, to improve performance.


  • Recovery of more than 80 percent of fibers
  • Reduced fouling in the downstream ultrafiltration equipment and therefore, reduced maintenance costs associated with cleaning, and reduced down time


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