Eco MAT® Rotating Belt Filter

Evergreen Water Solutions Ltd is an industry leader in delivering wastewater solutions to both municipal and industrial wastewater dischargers. Specializing in water treatment to quality compliance including trace metals and low-level nutrients, Evergreen Water Solutions is committed to development of processes to satisfy the challenging needs of customers around the world. As an integral piece to wastewater treatment processes Evergreen Water Solutions provides the most advanced primary treatment and solids recovery option available, the Eco MAT® rotating belt filter (RBF).

Manufactured by Blue Water Technologies, Inc, the Eco MAT® RBF features design features for process enhancement, energy minimization, and ease of maintenance resulting from years of operating experience. Evergreen Water Solutions customizations each system with proprietary control that interface seamlessly with plant SCADA systems and ancillary equipment designed to complement the Eco MAT® RBF, delivering a solution that saves end users time, space and money.

Industrial screenings applications are equally appropriate for the Eco MAT® RBF. RBFs have a proven track record of reliability in multiple industrial applications.

Engineers around the world have found rotating belt filters to be an efficient and economical solution to a variety of wastewater challenges due to its small footprint and its flexibility to be arranged in multiple configurations. In new municipal wastewater plants, the Eco MAT® RBF replaces traditional primary clarification. In existing plants, these filters can be integrated to expand primary clarification, relieve solids and BOD loading to the secondary system, or provide treatment for combined sewer overflow (CSO). Engineers have maximized the use of existing infrastructure while expanding plant capacities by installing the Eco MAT® RBF and thus reallocating the capacity of traditional clarifiers to the secondary system. Contact Evergreen Water Solutions today for case studies.

Eco MAT® (RBF) Capacities & Dimensions
Model Treatment
Capacity (L/s)*
Width (cm)
Unit Width
& Dewatering (cm)
Depth (cm)
Belt Mesh
Width (cm)
EM-1 3.5 124 91 91 86 30 20
EM-3 15 160 107 157 137 41 38
EM-7 25 191 122 170 155 61 56
EM-10 30 241 147 226 183 61 76
EM-15 55 330 147 226 221 89 76
EM-30S 115 330 221 318 221 89 152
EM-30D 115 330 274 356 221 89 76 (2x)
EM-30C 115 305 211 N/Ap 208 89 152
*Hydraulic capacity for RBFs is dependent on solids content and desired removal performance. These loadings reflect 60% TSS removal in typical municipal wastewaters.
How It Works

The Eco MAT® RBF removes solids through the use of a continuous-loop fine mesh belt screen. As the screen moves it acts like a conveyer and carries solids out of the incoming wastewater. A patent-pending cleaning system discharges the solids from the belt screen and deposits them into the screenings hopper, virtually eliminating any solids carry-over. Periodic hot-water flushes further clean the belt screen by removing oil and grease that may accumulate over time. An optional screw press dewaters the collected screenings between 20-40% dry solids while screened wastewater continuously passes through the unit.

The Eco MAT® RBF removes between 30-80% TSS and 20-40% BOD from wastewater and the unique design allows for removal of organic and inorganic solids as fine as 15-30 micron. The Eco MAT® RBF units are compact, completely enclosed low-maintenance solutions for wastewater. The integral odor containment of the design allows for indoor installation in a clean environment. Blue Water offers additional equipment for conveyance, dewatering, and bio-solids reuse as applications require.

Evergreen Water Solutions supplies standard equipment ranging in sizes suitable for small communities to large cities. There is no limitation in flow capacity designs. The Eco MAT® RBF is available in eight unique models that can be customized for varying capacities and redundancy, facilitating treatment in excess of 115 L/s in a single unit. Evergreen Water Solutions also provides the duplex unit designs for redundancy, as well as cartridge units for channel mounting that can be more economical for plants treating 1,000 - 10,000 L/s and beyond.