Advanced Treatment Units

Advanced Treatment Units
System needed to meet stringent standards at remote lodge

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System needed to meet stringent standards at remote lodge

Problem: As a result of stringent environmental standards of Manitoba Conservation, the owners of Quesnel Lake Caribou Lodge in Treherne, Manitoba, Canada, needed to upgrade their wastewater system. With no access to a municipal sewer system and no power source available, the system required high efficiency with very low power consumption.

Solution: The first stage of the installation employed the existing ejector system using two Anua Platinum 24 submerged aerated treatment units, along with a 2,000-gallon pump tank. This allowed the use of an ejector for the first season and, by reducing the effluent strength, a temporary license was awarded for that season. The second stage involved erecting a raised mantle portion of the area bed along with 16 Puraflo modules. Allowing less nitrogen and fewer pathogens to enter the environment, the system better protects fish and wildlife.

Result: The two Platinum treatment units reduced the size and quantity of materials required for construction. A sequencing valve ensures the system only pumps to four Puraflo units at a time, reducing cost and complexity. After careful inspection, Manitoba Conservation issued the lodge an environmental license to continue operations. 336/547-9338; www.anuainternational.com.


Wastewater plant meets restrictive environmental standards 

Problem: The Bristal Assisted Living facility in Lake Grove, New York, required an advanced onsite wastewater treatment system to meet stringent effluent requirements of Suffolk County on Long Island, and had a short construction deadline of two months.

Solution: The Engel Burman Group and Nelson & Pope Engineers and Surveyors turned to CromaFlow to design and build the wastewater treatment plant for the complex. The 15,000 gpd advanced treatment system consists of three SBR units with denitrification programming, and a sludge-processing unit. The treatment process is controlled by a PLC/HMI control panel with remote operations and monitoring to give the operator greater flexibility. The entire system from date of order to installation and startup was completed in less then six weeks, with Darr Construction handling installation.

Result: This system consistently meets the effluent requirements and total nitrogen requirement of less than 10 mg/L. The advanced control system allows for more efficient system operation and greater ease of use by the operator, Waste Inc., since the data from the system is available online for both the owners and operator to review and monitor. 570/435-5550; www.cromaflowinc.com.


Advanced algal attached-growth technology provides green solution 

Problem: The Cincinnati Nature Center in Milford, Ohio, receives over 100,000 visitors per year. In 2011, the facility needed to replace the two aging activated sludge treatment plants with a system that could meet new, more stringent NPDES limits of BOD of 10 mg/L, TSS of 12 mg/L, and NH3 of 1 mg/L. The system had to be easily expandable to handle increased future flows.

Solution: The nature center decided to install an Algaewheel system from OneWater. According to the manufacturer, the advanced algal attached-growth process uses an ecological balance between algae and bacteria to deliver an efficient and robust treatment system that provides a high degree of treatment with minimal power and operator attention.

Result: The nature center reports that the algal system requires only a part-time operator and has reduced energy costs, while continuously handling variable flows. In 2014, the center demonstrated confidence in the system by expanding flow to it by 66 percent without expanding the plant. Effluent limits continue to be met. 317/582-1400; www.onewaterworks.com.


Difficult-to-access subdivision treatment site requires maneuverable commercial Chesapeake Bay standard denitrification system

Problem: During his design of the Shepherd’s Cove subdivision, a new housing development along the Potomac River in West Virginia, engineer Jim Hutzell had to find a commercial treatment system capable of handling 6,200 gpd that could meet Chesapeake Bay effluent standards (BOD 5 mg/L; TSS 10 mg/L; and TN 18 mg/L), but was also lightweight, low-profile and maneuverable for placement in a difficult site. Hutzell also wanted a cost-effective technology with a solid track record that used minimal power.

Solution: Hutzell’s final design was a cluster of four Fuji Clean USA commercial CEN21 denitrification systems, each capable of treating 1,680 gpd. He based his decision on treatment quality, small footprint, profile and weight, low total cost and energy efficiency. The CEN21 produced NSF 40/245 numbers of BOD 5 mg/L, TSS 6 mg/L and TN 10 mg/L, accepting straight septic influent. The dimensions of the CEN21 (15 feet, 4 inches by 6 feet, 6 inches by 7 feet, 3 inches) and weight of 1,543 pounds overcame the site access hurdle. And at 10 cents per kWh, Hutzell calculated a total power cost of $1.60 per day. 

Result: The system was installed and scheduled for commission in March 2015. Each CEN21 unit will be sequentially brought online as flow from the growing housing development mandates. 207/406-2927; www.fujicleanusa.com.



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