|
|
Package Tertiary Filter Systems |
DOWNLOADS
Note: You will need Adobe Acrobat Reader and the Microsoft Word Reader for the downloadable documents.
INTRODUCTION
|
In some cases, effluent water from the Tertiary Filter System can be used for non-potable water applications. |
The Pollution Control System, Inc. (PCS) tertiary filter is a system for filtering the liquid effluent from a secondary wastewater treatment system. The tertiary filter system provides for additional removal of suspended solids from the secondary effluent and a further reduction on the biochemical oxygen demand (BOD). The filtering takes place in two parallel flow filter cells, each containing filter media consisting of a layer of anthracite and a layer of sand through which the liquid flows. This multi-media filter is capable of providing a tertiary effluent quality of 10 mg/l BOD5 and 10 mg/l SS when properly operated.
|
| |
Tertiary Filter System shown following the Secondary Treatment System.
|
The filtrate percolates through each of the multi-media filter cells and then into the area below the filter nozzle plates. From there, the filtered wastewater flows through the backwash piping, the backwash pumps, and into the clearwell tank. The filtered water in the clearwell will then overflow an effluent weir trough and exit the tertiary filter system.
When the surface of the filter cells become clogged or covered with solids, the wastewater level begins to rise.
The rising wastewater level activates the air scouring and backwash cycles. The backwash cycle will use filtrate from the clearwell to backwash and dislodge the solids entrapped in the media. The media will be automatically air scoured and backwashed as air and clean filtrate water is pumped through the filter media from the bottom up, dislodging the retained solids. The rising backwash water overflows into the surge (backwash return) chamber. The surge chamber collects the backwash water and over a several hour period will return it back to the head of the treatment system. |
|
513.831.1165
CIRCULAR MECHANICAL