Secondary (Final) Wastewater Treatment Circular Clarifiers

Monroe Environmental’s Secondary Circular Clarifiers for wastewater are designed to provide a high quality effluent suitable for discharge to the environment or further treatment.

The Monroe Environmental Secondary Clarifier (often called ‘final clarifier’) effectively separates the biological floc and colloidal solids to produce wastewater with very low levels of organic material and suspended matter.

Solids Contact and Clean Water Treatment Circular Clarifiers

Monroe Environmental manufactures several types of water treatment clarifiers that combine chemical treatment, flocculation, and sedimentation.

These units are heavily utilized in both industrial and municipal processes for treating groundwater, surface water, and process water, and include Flocculating Clarifiers and Solids Contact Clarifiers.

Thickeners

Monroe Environmental Circular Thickeners are a crucial step between upstream process clarifiers/separators and downstream de-watering and sludge conditioning processes. A well designed thickener provides storage and equalization, and reduces the costs associated with de-watering.

Thickeners are similar to other circular clarifiers in appearance and operation, but typically require higher operating torque and alternate sludge collection designs for optimal performance.

Spiral Scraper

Spiral Scraper type clarifiers utilize long-sweeping, curved scraper blades to move solids across a basin floor. They are similar to scraper-type clarifiers in that they drag settled solids to the collection area, however, they can more quickly remove these solids and thus maintain lower sludge blankets in some applications. This design can be utilized in primary, secondary, and industrial wastewater applications.

Riser Pipe

Riser pipe clarifiers rely on differential head pressure to collect settled solids from the tank floor. Each riser pipe is situated at the intersection of a v-plow and receives a continuous feed of sludge that returns to a sludge collection box near the center of the clarifier. This design is intended for secondary, biological, or flocculated solids which are more fluidized and have lower densities than primary wastewater and heavy industrial sludge.

Suction Header

Suction header clarifiers rely on differential head pressure to collect settled solids from the tank floor. These units have a long, tapered collection arm with multiple orifices sized to stabilize and maintain optimum sludge transfer velocities through the header. This design is intended for secondary, biological, or flocculated solids which are more fluidized and have lower densities than primary wastewater and heavy industrial sludge.