mixing matters blog

Industrial Mixing topics from your mixing experts

Mixing matters blog - Covering any topic involving industrial mixers and utility mixers

Mixer Configuration

Optimizing an Anoxic Mixer for Denitrification

Optimizing an Anoxic Mixer for Denitrification in Water Treatment Simply adding bacteria to a wastewater plant does not guarantee that they will achieve the targeted task of denitrification. To encourage their growth, it is essential to first establish an anoxic environment, and then introduce an anoxic mixer that has been optimized specifically for the process. The Denitrification Process Denitrification in wastewater treatment is the conversion of nitrate (N03) to nitrogen gas (N2). It is a process that involves the reduction of nitrogen present in waste streams to an acceptable level so the treated water can be discharged into the environment via streams, ponds, lakes, etc. Lowering nitrate levels in a waste stream is achieved through creating an anoxic environment in which heterotrophic

December 11, 2014 4 Comments

Mixing 101

Keeping Your Solids in Suspension

Optimized Solids Suspension Applications Achieving a uniform dispersion of solids in a product is critical to your product’s quality. In processes that mix solids in fluid, particulates that cannot dissolve in liquids will either sink to the bottom of the tank and collect in the corners, or stick together and agglomerate. This compromises product uniformity (product quality), and in extreme cases, can cause a system to malfunction or fail. The main objectives of solid and liquid solutions are: Avoiding solids accumulation in a stirred tank Maximizing the contact area between solids in a liquid Ensuring the solid particles are uniformly distributed throughout the tank The goal is to bring the mixture into specification and keep it there. This means keeping

September 11, 2014 No Comments

Industrial Mixing

Mixing 101: Flow Patterns & Impellers

Mixing 101: Flow Patterns & Impellers Mixing Flow Patterns & Impeller Types In our article on 4 Impeller Types and Their Applications, we provided an overview on the most common types of impellers used in industrial mixing. Now we’ll go into more detail about each impeller type and their influences on the mixing process. Our focus on impellers is due to the fact that they are the part of the mixer that does the actual mixing: as they rotate they create fluid flow. These flow patterns are the primary considerations when designing a mixer because creating the right flow pattern is critical to achieving the desired result. The most common flow patterns in mixing are axial (down and up) and

September 20, 2013 25 Comments

Industrial Mixing

Mixing 101: Baffled by Baffles?

Mixing 101: Baffled by Baffles? How Baffle Configuration Can Optimize Industrial Mixing In our previous posting on configuring your mixer, we learned that the tank type and volume, viscosity, specific gravity and the process are key factors the mixing process. In this article, we dive into how baffle configuration and mixer mounting can prevent the undesirable flow pattern of swirling. Let’s look at a common tank configuration: an un-baffled cylindrical tank. If a mixer is center-mounted in this tank, what we see is a very inefficient flow pattern: the tangential velocities coming from the impeller cause the entire fluid mass to spin (Fig. 1). Basically, the entire fluid (and its solids) moves like a merry-go-round. In solid suspension applications, the solid

October 19, 2012 6 Comments

Dynamix Products

Mixing 101: 4 Impeller Types & Their Applications

Mixing 101: 4 Impeller Types & Their Applications The Importance of Impeller Selection We first mentioned impellers in our blog discussing 4 factors for configuring your mixer. In this post, we will look more closely at impeller types and their applications. The impeller is the component of a mixer that does the actual mixing and produces the results. That’s because when it rotates, it creates fluid flow and shear patterns. While there are many types of impellers, there are 4 main types we use when engineering mixers. The 4 Main Impeller Types 1. Airfoil Generally most efficient because it produces the maximum pumping with the lowest shear. Standard Dynaflow™ High Solidity Dynaflow™ for Gas Dispersion 2. Pitch Blade Ideal for

December 6, 2011 12 Comments

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mixing matters blog

Industrial Mixing topics from your mixing experts