backwash

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backwash

The reversal of the direction of a usual pattern of flow.
References in periodicals archive ?
Accurately measuring the turbidity of the water coming out of the filter is the best way to determine when backwashing should occur, optimising drinking water plant performance and minimising operating costs.
Backwashing System: Traditionally, the filter medium is made from fine granulometries that allow for an effective filtration process, but this has the disadvantage of requiring frequent backwashing operations (and consequent filtering interruptions).
For example, RPA's AFR Series tubular backwashing pressure filters automatically filter solids from 2 to 500 microns at 95% efficiency, while self-cleaning on reaching a preset differential pressure threshold.
The seven tubes that make up the ACCUFLUX media element have a combined surface area total of 791 square inches (5100 cm2), which capture more particulate matter to extend the time between required backwashing and increase productivity.
It is non-toxic and chemically inert, prevents premature fouling on the filter grid, uses less water and reduces maintenance by easier and complete backwashing of the filter media.
All GAC will be subject to post furnace backwashing.