Engineered to treat up to 1,900 gallons per day of domestic strength wastewater, the one-tank CEN21 model is the company's largest one-tank system rated for enhanced nitrogen removal in nutrient sensitive areas. Certified to NSF/ANSI 40/245 standards, CEN series systems have demonstrated best-in-class nitrogen removal performance in multiple-state field testing protocols.
The CEN21 is the go-to one-tank system for exceptionally large homes and commerical sites that require denitrification. Featuring a footprint of only 15'-3" x 6-6", this system is rated to treat domestic strength wastewater flows of 1,900-gallons per day to NSF 40/245 standards making it a perfect choice for septic professionals designing systems for large homes and small commercial sites in tight, environmentally sensitive locations where maximum nitrogen reduction is required or desired.
Weighing only 1,543 pounds, this hand-laid fibre-reinforced plastic (FRP) unit can be squeezed into tight and difficult commercial sites using standard excavating equipment. Designed to accommodate variable flows and shock loadings as well as being highly energy efficient (5.4 kWh/day), this low maintenance system, like the other CEN residential models, is ideally suited for both replacement sites and new construction.
- Reliable, Robust Performance. Based on both 3rd party testing in the U.S. (NSF), and corroborated by thousands of field test data points worldwide (including the U.S.) the CEN21 produces a consistent effluent quality with a pollutant removal ratio of around 97% - 98% and nitrogen reducing ratio of 75% (NSF data), For a technical explanation of system application, please refer to our Technical Summary.
- Proven Technology. With over 50 years' experience, 2+ million installed systems (and currently installing over 40,000 per annum), Fuji Clean Co., Ltd. (Fuji Clean USA's parent company) is the world's leading manufacturer of onsite wastewater treatment systems. With over 50 engineers on staff and a relentless pursuit of product improvement, the breakthrough CE and CEN model series are the company's most popular and successful product lines.
- Low Profile. Aesthetically pleasing, the only visible indications of this one-tank system are two 20" diameter and one 24" at-grade covers. Two unobtrusive football-sized FujiMAC 150RII blowers and very small alarm panel can be located up to 100-ft. away and easily shielded from direct view.
- Easy Maintenance. The CEN unit is designed for efficient and effective semi-annual maintenance; the majority of which is accomplished with simple turning of control dials that purges heavy bio-film growth from the treatment media. No messy component removal and hose-down is necessary. A typical service visit that includes solids backwash cleaning takes about 20 minutes. The system is designed for efficient storage of sludge. Depending on use and influent strength, typical sludge pumpout is 1x every 2-3 years.
- Low Operational Cost. Best-in-class FujiMAC RII series linear diaphragm air blowers are both energy efficient and durable. Compare the system's 5.4 kWh/day power draw with the energy required of other systems. FujiMAC blowers should last around 5-years and low-cost blower rebuild kits are available from all Fuji Clean certified distributors and service providers.
- Quiet. A pair of FujiMAC 150RII blowers operates at a "dishwasher quiet" 82 decibels.
- Easy Installation. Plug and play units are ready for installation upon delivery. No onsite system assembly required. Systems are compatible with both Tuf-Tite and Polylok risers.