1. E FFLU E NT F I LTE R 2. DUAL TI M E DOSE PU M P(S) 3. ANOXIC M IXE R 4. AI R D I FFUSE R

5. M E DIA SE IVE 6. B LOWE R & HOUSI NG 7. AI R LI FT SLU DG E R ETU R N PU M P 8. DOSE PU M P(S)

D E-N ITR I FICATION

1. M IXE R MOTOR 2. I M PE LLOR 3. AI R D I FFUSE R 4. M E DIA SE IVE

5. B LOWE R & HOUSI NG 6. SLU DG E R ETU R N PU M P 7. E FFLU E NT F I LTE R

POST D E-N ITR I FICATION

POST DE-N ITR I F ICATION

POLISH I NG M B B R TAN K

Post DN systems are designed to retrofit existing treatment systems that fully nitrify wastewater but do not denitrify. Designs include carbon addition, anoxic mixing, and polishing aeration to remove excess carbon. They can be designed to meet nitrogen limits of less than 10 mg/l.

Complete denitrification systems utilize multiple aerobic stages of treatment to remove BOD and fully nitrify the waste stream. Recycling nitrified effluent to a pre-DN anoxic stage uses influent BOD as a carbon source to reduce or eliminate chemical addition.

Systems are designed to meet nitrogen limits as low as 10 mg/l.

SE PTIC TAN K EQ TAN K N1PRE-DENITE DOSE TAN KBOD TANK

N2 CLAR I F I E R

CLAR I F I E R

WEXCO M B B R D E-N ITR I F I CAT I O N

Biofilm growth on media surface

Can work for small flows (hundreds of gallons per day) and easily scales to large flows (million gallons per day).

High density of bacterial growth due to large surface area of media.

Expandable if flows or loading increases.

Add pretreatment to or expand existing systems without tank installation.

Works well in cold climates.

T H E B E N E F I T S O F D E - N I T R I F I CAT I O N

T H E S M A R T E R T R E AT M E N T S O LU T I O NWexco MBBR (moving bed bioreactor) utilizes small biofilm carriers which provide a stable home for

large populations of bacteria to grown and treat the wastewater. That, coupled with time tested aeration equipment, creates an efficient treatment process which can be used in most applications.

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Flexible install, below ground fiberglass or concrete tanks, above ground steel, concrete, or fiberglass tanks.

WHY US E M B B R?

S I M P L E . E F F I C I E N T . C L E A N W A T E R .

Can be designed for both Pre and Post De-Nitrification (DN).

Pre-DN configuration allows nitrogen removal without supplemental carbon by using influent as a carbon source. Additional carbon may be added if influent carbon is not sufficient.

Anoxic stages uses energy efficient mixing technologies.

Design flexibility with effluent limits down to less than 10 mg/l.

Supplemental heat is added when wastewater temperatures are low.

Can be set up for Post-DN only if existing treatment system isn’t meeting total DN requirements.

Multi-stage configuration allows specific populations of bacteria to thrive in each chamber.

Can achieve total nitrogen removal with influent temperatures down to 40°.

SMART-Treat MBBR