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PCS - Model TF-2-2-C -Package Tertiary Filter System
Pollution Control Systems Inc. (PCS) is pleased to provide the following equipment, specifications for your consideration. One (1) prefabricated carbon steel Tertiary Filter System and related equipment designed and constructed in accordance with the plans and specifications stated herein. The tertiary filter will be a Model TF-2-2-C. The tertiary filter will be of the granular multi-media type designed specifically for filtering biological treatment plant effluent at a design flow rate of not more than 5,000 GPD of 30 mg/l BOD5 and 30 mg/l TSS. The filter is capable of providing an effluent quality of 10 mg/l BOD5 and 10 mg/l TSS when properly operated and maintained.
The packaged tertiary filter provides for flow division, filtration, backwashing, surge control and disinfection of the wastewater.
The influent wastewater will enter the filter through a flow division trough where the flow will be divided equally to each of the two (2) filter cells. Each filter cell will provide for the filtration of biological treatment plant effluent by the use of a dual media. This media contains both sand and anthracite to accomplish the sequential filtration and removal of suspended solids. The filter media is fully submerged to evenly distribute the wastewater over the entire filter cell.
The wastewater percolates through the filter cells and then into the filter nozzle manifold. From there the filtrate flows through the backwash pipe, backwash pumps and into the clearwell.
The filtrate in the clearwell will then overflow into the disinfection chamber. The disinfection chamber will provide for the addition and mixing of a disinfectant with the filtrate. The disinfection chamber will also provide the required retention time to ensure thorough disinfection of the filtrate.
As the surface of the filter cells become covered with solids, the wastewater level begins to rise. The rising wastewater level activates the backwash cycle. The media will then be automatically backwashed.
The backwash cycle will use clean filtrate water from the clearwell for backwashing. Clean filtrate water is pumped through the filter media from the bottom up, dislodging the solids entrapped in the media.
The rising backwash water overflows into the surge chamber. The surge chamber collects the backwash water and pumps it back to the headworks of the biological treatment plant over several hours by using the flow return valves in the discharge line.
- Number of Filter Cells: 2
- Square Feet of Filter Surface Area: 2 each cell
- Clearwell Chamber Volume: 309 gallons
- Surge Chamber Volume: 307 gallons
- Chlorine Contact Chamber Volume: 104 gallons
- Overall Length/Width/Height: 7’-3” x 6’ x 6’
- Shipping Weight (Approx.): 8,000 pounds