Motor Actuated Rotary Distributors (MARD)

Motor Actuated Rotary Distributor for distribution of wastewater over trickling filter or biotower media. The unit provides a cost effective means of distribution with a low maintenance piece of equipment. Aluminum construction provides corrosion resistance which results in longevity without the need for repainting. Large non-clogging distribution orifices also reduce maintenance associated with spray type nozzles.

MARD provides:

Uniform distribution of wastewater over filter media

10:1 rotational speed control of distributor

Ability to control speed of distributor for media flushing

Low maintenance

Corrosion resistant aluminum construction

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Features and Benefits

Features:

No mechanical seal
Aluminum construction
Motor actuated with a VFD
2 or 4 arm construction
Mast mounted bearing
Large non-clogging distribution orifices

Benefits:

Low maintenance
Eliminates replacement
Corrosion resistance
Control of distributor speed
Media flushing by slowing distributor
Wider flushing intensity range
Reduced cost
Eliminates potential of flooding bearing.
Reduced maintenance

Wastewater flows into the MARD unit through a central located inlet pipe and over a stationary weir into a rotating tub assembly. The depth of water in the rotating tub will force the water out into the distribution arms. Large non-clogging orifices on the top side of the arms distribute the wastewater proportionally along the length of the arm. Wastewater flows off of the back of the arms onto the filter media. The drive motor is connected to a VFD to control the distributor speed. 64 units have been supplied since 1990. Installations range from 14 feet (4.3 m) to 175 feet (53.3 m) diameter. Installation flow ranges from 28 gpm (6 m³/hr) to 45,000 gpm (10,225 m³/hr).

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