As treatment regulations continue to evolve, wastewater treatment operators are required to outfit their plants with more equipment. That equipment takes valuable space, which is why Dual Dry Bulk Chemical Storage Silos from Acrison make sense for plants that need to provide storage for multiple bulk chemicals. The silos include integral feeding and dissolving systems designed to offer maximum application flexibility.

“The dual silo systems can be used to significantly reduce the overall height profile of a single-rate application,” says Joe Krudys, Acrison’s sales manager for their water and wastewater treatment division. “They can also facilitate the feeding of two different chemicals to one or more application points.”

Acrison dual silos are typically mounted close enough to each other to allow for a single ladder with safety cage to access one silo roof, and a catwalk spanning the two silos to allow for access to the second roof. Fill lines are routed to a single loading point, with a single truck-fill panel operating both systems. A security keypad, wired to automatic valves on the fill line, ensures that dry chemicals are being delivered to the correct silo. According to Krudys, the silos are a fit for both water and wastewater treatment applications.

“Examples of typical dry chemicals that we feed are hydrated lime and powder-activated carbon for both water and wastewater systems, and microsand for ballasted clarification applications,” says Krudys.

As with all of Acrison’s silo systems, means for promoting material flow into the silo’s integral feeders is provided strictly on an as-needed basis without the use of air. This eliminates problems that can occur when flow promotion devices operate continuously, or on a fixed-time basis.

Optional custom control packages and ancillary equipment are available with the dual silo system. Controls are typically located inside the skirted silo, along with necessary piping and wiring, requiring minimal installation of some external components prior to operation. According to Krudys, Acrison has sold its silo systems for the last 15 years, but only started providing the dual, catwalk-connected silos in 2014. He says those systems being used in the field are drawing positive reviews.

“Feedback has been very positive,” he says. “Customers are particularly pleased that they are able to obtain custom control packages and ancillary equipment with our silo packages. They also like the fact that our packages are supplied with all necessary piping and wiring, making them virtually ready to use after minimal setup.” 201/440-8300; www.acrison.com