Focus on Grit Removal Systems

The focus on effective grit removal is getting a lot more intense lately. Grit has become a hot topic. Last year, an all day Grit Workshop was held at WEFTEC. There were eight grit related papers presented including six addressing “A Focus on Grit Removal and Handling Strategies”. Of particular interest are settling characteristics and removal efficiencies of various technologies. The performance of historical, conventional mechanically induced vortex (MIV) units was questioned. The HeadCell was shown to outperform MIV systems. Contact us for a more detailed summary of this year’s papers.

We’d like to think the focus on grit has something to do with Hydro’s growing installation base of highly effective grit removal systems and satisfied customers throughout the United States. Right here in Kentucky, Indiana and Ohio are more than twenty Hydro grit removal systems in operation. Until now, most design engineers and plants did not have accurate reference data to use in effective grit system design, but they do now.. Hydro International now has available national and regional grit gradation data which is the result of more than 120 tests across North America. The data includes valuable average physical sizes as well as information on settling velocity (SES), making it the most comprehensive information available on grit and its behavior. We welcome the opportunity to share this valuable data with you. Contact us for specific gradation information. (Click here for gradation flyer)


Also from Hydro International:

A Product Spotlight – Hydro Vortex Drop™ Shaft

The Hydro Vortex Drop™ Shaft is a self-activating system with no moving parts that quietly and safely drops flow (water, stormwater or wastewater) from virtually any height. It offers improved flow characteristics, significant cost savings and better odor, corrosion and erosion control when compared to conventional drop systems.

-No flow is too big or small
-Efficient Flow Control
-Erosion reduction
-Odor/Corrosion control
-Flexible design
-All stainless construction

The Hydro Vortex Drop™ Shaft can be retrofit into an existing chamber and its integrated access and small pipe sizes reduce excavation cost, shaft diameters and the need for a separate access shaft. The system also benefits from a compact and simple to construct inlet chamber with no complicated curves or benching required. With its unique operation and powerful mixing on the outlet of the system, the dissolution of gases into the liquid rather than releasing it into the chamber or atmosphere eliminates odors and corrosion problems based on high H2S concentrations. Learn more.


Source: Hydro International

NEFCO’s Stamford Density Current Baffle Version 2.0

The first improvement in density current baffle performance in 30 years: NEFCO Stamford Density Current Baffle Version 2.0. Check it out on You Tube: www.youtube.com/NEFCOinnovations

NEFCO has recently completed a multi-year CFD Baffle Design Study that led to the development of Stamford Baffle 2.0. SB2.0 is 30% more effective than the original 45o Stamford Baffle. The new 30o baffle with increased horizontal projection reduces TSS as much as 70%! SB 2.0 is the most advanced and effective DCB available today!

-Increased horizontal projection
-30° Inclination angle
-Integrally molded bracket
-Rugged construction
-Corrosion resistant
-5 Year warranty

-Reduces clarifier TSS by as much as 70%
-Reduces turbidity
-Improves hydraulic capacity
-Installs in half the time of other baffles


New Cerlic O2X DUO with O2O Optical Electrode

Introducing the Cerlic O2X DUO submersible Dissolved Oxygen Sensor for continuous measurement of DO (with temperature output too—at no additional cost): made in robust 316SS!

The Cerlic O2X DUO submersible DO Sensor can use either an O2O Optical or Clark Cell. Your choice to meet your needs! The Cerlic Clark Cell uses a teflon membrane minimizing fouling with built in temperature compensation to provide stability. The Cerlic O2O Optical electrode uses Phase Shift Technology for a quicker response and improved stability as well as a new focusing lens for improved accuracy. A new cap coating is not damaged by UV light like other current optical electrode designs. Both types come with automatic in place cleaning using compressed air or water to ensure a long life. The electrodes are replaceable in the field. More on the Cerlic O2X DUO is here: Cerlic O2O.









                         O2O Optical









                         Clark Cell