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The system may consist of a single pond or several ponds in a series, each pond playing a different role in the removal of pollutants. After treatment, the effluent may be returned to surface water or reused as irrigation water (or reclaimed water ) if the effluent meets the required effluent standards (e.g. sufficiently low levels of pathogens ).
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[1] [2] It is most frequently used by reference to a set of standards against which compliance, generally achieved through treatment of the water, can be assessed. The most common standards used to monitor and assess water quality convey the health of ecosystems , safety of human contact, extent of water pollution and condition of drinking water .
In water treatment plants, backwashing can be an automated process that is run by local programmable logic controllers (PLCs). The backwash cycle is triggered after a set time interval, when the filter effluent turbidity is greater than a treatment guideline or when the differential pressure ( head loss ) across the filter exceeds a set value.
Zepp Clarity offers three over-the-counter hearing aid models ranging from $900 to $2,000 per pair. You don’t need a prescription to purchase these devices, as they are designed to be self-fitting.
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