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Mixing in water treatment
Industrial Mixing

Mixing 101: Low rpm, High Torque Mixing

Mixing 101: Low rpm, High Torque Mixing In the process industry, there’s a strong focus on power as the defining characteristic in mixing. Many considerations are often left by the wayside when choosing a mixer. These factors can make or break the application. Relying solely on the G-Value or velocity gradient in mixer design leaves important information out of the equation. Focusing on the G-Value gives rise to the misconception that horsepower, rather than torque, is the critical factor determining mixing effectiveness. This method is effective for applications requiring high-sheer and turbulent flow, but this isn’t always the case. High-speed mixing introduces a host of additional considerations based on fluid viscosity, flow patterns, and shearing. Mixing Categories Different types of

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Quality Mixing
Mixer Configuration

Agitator Design for Wastewater Clarification – Part 2

Clarification on Flocculation In our previous article, Agitator Design for Wastewater Clarification Part 1, we looked at how to optimize a mixer for the unit process of coagulation. In wastewater treatment, coagulation is normally followed by flocculation. While coagulation is used to destabilize and agglomerate suspended waste particles, flocculation brings the colloids out of suspension in the form of floc, and allows the particles to be more readily removed from the water stream. In this article, we will examine the process of flocculation, the flocculator mixer, and how mixer parameters change to achieve the desired result. Flocculation Following the coagulation of destabilized microscopic particles in wastewater, the process of flocculation encourages the newly formed micro-floc to stick together, making even larger clumps

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Mixing in water treatment
Mixer Configuration

Agitator Design for Wastewater Clarification – Part 1

Clarification on Coagulation Clarification of water using coagulating agents has been practiced since ancient times. The use of alum as a coagulant dates back to the Romans around 77 AD, and by 1757, England was using alum for coagulation in municipal water treatment. This clarification process remains essential in various water treatment disciplines today. In the modern water treatment plant, the use of coagulants to treat wastewater are better understood, which has led to significant optimization of process equipment and chemistry. Coagulation and flocculation are two common unit processes that are designed to remove very small particulate matter by forcing them to clump or stick together so that they will settle out and be removed from the wastewater as “sludge”.

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Wastewater Mixers in Water Treatment
Mixer Configuration

Selecting Wastewater Mixers for Wastewater Treatment – Part 1

Selecting Wastewater Mixers for Wastewater Treatment – Part 1 Wastewater Mixers for Optimal Chemical Preparation Chemical preparation in wastewater and water treatment directly impacts many downstream processes. Let’s take a look at several common chemicals used and some key factors that influence their preparation and the selection of wastewater mixers. Lime Slurry Preparation When preparing lime slurries for controlling pH, uniformity is critical. Why? Because lime solids must reach/stay in suspension if they are to serve their purpose in downstream processes. For this reason, it’s essential that wastewater and water treatment facilities have lime slurry mixers that can efficiently and effectively make up/maintain uniform slurries. In order to successfully suspend/re-suspend solids, a mixer needs to create a flow pattern that involves the entire

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Dynaflow High Efficiency Impeller Flow Pattern
Mixer Configuration

Selecting A Waste Water Mixer for Wastewater Treatment – Part 2

Selecting A Waste Water Mixer for Wastewater Treatment – Part 2 Waste Water Mixers for Optimal Flash Mixing & Flocculation In part 1 of this series on wastewater and water treatment mixers, we discussed how to select a waste water mixer for chemical preparation. In this post, we’ll show you how to select a Waste Water Mixer for flash mixing and flocculation. Done in a Flash? Aggressive Agitation + Speed for Flash Mixing Flash mixing is used to evenly distribute coagulating chemicals in water, allowing micro-flocs to form. As the precursor to flocculation, flash mixing increases the efficiency of flocculation and reduces chemical wastage. Because the components need to be quickly and evenly dispersed, this process is all about brute

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Polymer Activation
Industrial Mixing

Mixing 101: 4 Factors for Configuring Your Fluid Mixer

Mixing 101: 4 Factors for Configuring Your Fluid Mixer Considering Mixer Configuration If you’re in an industry that includes fluid mixing in its processes, you probably know that finding the right fluid mixer for your needs is critical to maintaining quality control, reducing costs, and optimizing efficiency. The key here is to engineer a fluid mixer that addresses the specific needs of your process. When configuring a mixer for your process, your mixing engineer should consider the following 4 factors: Factor #1 – Tank Type & Volume This determines the amount of fluid your tank can hold. This is important because it will determine the size and position of the fluid mixer and its mounting. Factor #2 – Viscosity This

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