Product/Service

GREENLEAF® Filter System

Source: Degremont Technologies

Greenleaf Filter Control

The Greenleaf® Filter Control uses low-maintenance siphon technology to control the operation of multiple granular media gravity filters. Our unique design eliminates bulky piping and valves and complex instrumentation, delivering low-cost, trouble-free performance proven in hundreds of installations.

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Improved Plant Performance
Greenleaf filters offer excellent stability because they are always under a positive head. All flow rate changes are gradual to eliminate the shocks and surges that can upset the filter bed. Flow is equally divided among operating filters using simple hydraulics — no mechanical flow controllers are required.

Centralized Controls
Centralized control economizes operation. Operators can easily select and control any filter cell from a central control center. Choose from local or remote operation and any degree of automation. Housed in free-standing modular cabinets, all controls are visible and readily accessible for maintenance and service.

Operational Efficiency
Our filters are designed to your specifications, so in many cases, a filter cell may be backwashed with effluent from remaining filter cells without depleting the clearwell capacity. Siphon valves that initiate and stop the flow during both the filtering and backwash cycles are easy to operate from the control center.

Reduced Capital Costs
The Greenleaf Filter Control offers significant savings over conventional control systems in equipment cost, site preparation, excavation, and installation. Prefabricated assemblies that require fewer components reduce field construction costs, and common wall construction with a neighboring clarifier affords additional savings.

Design Flexibility And Small Footprint
The Greenleaf Filter Control can be designed for plant flows of less than 1 mgd to much larger systems — and requires only two-thirds of the space needed for a conventional system operating at the same filter rate. Greenleaf’s clearwell need not be located under the filters, avoiding substantial costs in excavation and support structures, especially where poor subsurface conditions such as rock or groundwater exist.

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