Pulp and Paper Process Wastewater Treatment

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Pulp and Paper Process Wastewater Treatment

Aeration and mixing technologies ideal for wastewater treatment

Heavy Water Demands Create Strong Need for Treatment

Pulp and paper production generates roughly 53,000 gallons (200 m3) of wastewater per ton of product. Wastewater characteristics vary widely depending on the process used. Common craft processes produce wastewater laden with suspended solids, BOD/COD, nitrogen and phosphorous, and chlorinated
organics (from the bleaching process).

Proper Aeration is Key to Effective Treatment
Conventional wastewater treatment processes include aeration and mixing within basins and lagoons and aerated activated sludge processes employing biofilm carriers and membrane technologies. Many pulp
and paper plants focus their treatment efforts to produce re-use quality effluent, thereby reducing their water demand and environmental impact.


Aeration and Mixing Technologies to Meet the Demand
Fluence offers aeration and mixing technologies well-suited to treat pulp and paper process wastewater.

 

Tornado® Family of Surface Aerators

The Tornado aerator provides superior subsurface directional mixing and oxygen dispersion to wastewater bodies. The intense action of the aerator shears wastewater solids to increase treatment performance by enhancing the surface area for oxygen and bacteria contact.

 

• 2 – 100 HP (1.5 – 75 kW)

• 1800 rpm at 60 Hz (1500 rpm at 50 Hz)

• Grease-lubricated sealed bearings are ideal for high concentrations of solids, grit, and sand

• Solid shaft; vibration-free design

• Low maintenance and patented replaceable modular seals

• Tapered roller bearings prevent aerator shaft vibration and absorb propeller thrust loads

• Self-heating bearing design is ideal for cold climate locations

• Available in standard 304 stainless steel and optional 316 stainless steel construction

• Premium efficiency motor is designed to work with soft start VFD controllers to eliminate power surge  penalties and reduce energy costs

• Blower-assisted models are available for high oxygen demand applications.

 

Twister® Low-speed Surface Aerators

Twister aerators are designed for long-term continuous operation in the most challenging and heavily-loaded industrial applications. Twister technology optimizes the spray of water droplets to generate some of the highest oxygen transfer rates of any mechanical aeration system.
The Twister is ideal for activated sludge, oxidation ditch, and extended aeration applications.

• 5-100 HP (3.75 -75 kW) Models

• 40-100 rpm at 50 or 60 Hz

• Flexible mounting options: stainless steel floats, bridges, and platforms

• Minimum 2.0 gearbox safety factor ensures long life

• Floating fibreglass-reinforced rotor

• All bearings are roller-type; standard units are dip or splash oil-lubricated.

Pulp and Paper Wastewater Fluence Equipment Advantages
Harsh environment due to organic
materials or chemicals causes corrosion 		All components, including floats, are 304 stainless steel construction—no galvanized parts; 316 stainless steel is available as an option. The Tornado features sealed grease-lubricated bearings that are not exposed to wastewater
High solids concentrations Aeration equipment provides intense horizontal mixing, maintaining solids in suspension and providing deep aeration
and mixing action.
Foul odors Surface aerators create an air cap at the water’s surface and provide aeration and mixing below the surface, reducing foaming and eliminating splashing or spraying (Tornado only).
Harsh wastewater environments Fluence aerators are designed for harsh wastewater conditions. Industrial-grade, chemical-duty and explosion-proof motors are available as an option and are designed to withstand high temperatures associated with some processing applications. Corrosion - and UV-resistant stainless-steel construction ensures long-lasting performance.
Energy-intensive treatment Premium efficiency motors, turndown capabilities, and smart aerator technologies.
Maintaining treatment equipment Aerators are easy to install, require little maintenance, and some models are accessible at the surface with no draining or dredging necessary for regular maintenance.

 

 

 

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