Steve Jaasund – LDX Solutions and the Future of Emissions Control Technology

One of the first air emission control companies to advertise in Panel World magazine was Geoenergy®, and one of its co-owners was Steve Jaasund, who today is Geoenergy Products Manager for LDX Solutions. The life and times of Geoenergy and Jaasund have been well documented through the years in Panel World. Further development in recent years prompted the following question and answer exchange. Jaasund can be reached at

Jaasund’s Long Run with Geoenergy Isn’t Over

Air Pollution Control: General

November 11, 2019

The Benefits and Advantages of Wet Electrostatic Precipitators

As environmental requirements continue to change, the demand for better gas cleaning technology grows. This trend has continued to push the development of a relatively old technology – the wet electrostatic precipitator (wet ESP, or WESP).

The man who first developed the concept of the wet ESP was Dr. Frederick Cottrell. First used in 1910 at a smelter in California for the collection of sulfuric acid mist, the wet ESP led to the development of the dry ESP. Until 1970, the wet precipitation technology remained a mainstay for acid mist control, but nothing else. The dry ESP became the dominant version of precipitation technology.

Wet Electrostatic Precipitator

October 24, 2019

Regenerative Thermal Oxidizer (RTO) Basics and Applications

Regenerative Thermal Oxidizers (RTOs) that control volatile organic compounds emitted by a wide variety of industrial processes are widely accepted. As a general rule, RTO technology has been very successful with most installations, operating trouble-free for extended periods. In some cases, however, operation has been troublesome, and a good proportion of these problem applications have been on biomass dryers. Biomass dryers include wood dryers, sewage sludge dryers, and dryers used in ethanol production. This paper addresses why some RTOs have problems and how to avoid these problems…

regenerative thermal oxidizer basics

Regenerative Thermal Oxidizer

Wet Electrostatic Precipitator Flow Direction

Flow direction in a Wet Electrostatic Precipitator (wet ESP) is extremely important. In contrast, flow direction in dry ESPs is of such little importance it isn’t even a consideration; virtually all dry ESPs operate in the horizontal flow mode.

Wet ESPs come in various configurations and use round, hexagonal, or square tubes, or plates. In each of these designs the flow direction can vary as upflow, downflow or cross flow. The following discussion will focus primarily on the difference between upflow and downflow. As the reader will see, the implications of this for cross flow are obvious…

Wet Electrostatic Precipitator

Regenerative Thermal Oxidizer VS Regenerative Catalytic Oxidizer

Regenerative thermal oxidizers (RTOs) are widely accepted for the control of volatile organic compound (VOC) and hazardous air pollutant (HAP) emissions. Years of experience with this technology have shown that RTOs can operate very reliably and do an excellent job of destroying VOCs; efficiencies of up to 99% are not uncommon.


Regenerative Catalytic Oxidizer

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