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Both trickling filter and activated sludge processes are common methods of secondary wastewater treatment. While commonly perceived as competing technologies, did you know that these two processes can actually work together to improve performance, reduce operational cost, and simplify operation?…
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When choosing plastic media for trickling filter applications, are you thinking 20-30 years ahead? Too often, upfront cost is the primary influence behind media selection. Cheap or poorly manufactured media assumes an increased risk of premature media collapse, delamination, frequent…
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Solids settling is a critical aspect of most water treatment applications. Whether a tank utilizes a form of advanced solids settling through the use of tube settlers or plate settlers, or if the basin has a simple open clarifier design,…
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The main purpose of a trickling filter, or biotower, support system is to support the media above. But did you know that supports also play a crucial role in successful system operation and performance? Understanding the importance of support systems, the benefits…
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In evaporative cooling applications, the word drift is used to describe the small water droplets that escape the cooling tower within the air stream. Drift is not to be confused with plume, which is the cloud- or mist-like result of…
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What is Koroseal? Koroseal is a perforated, semi-flexible PVC film that is used in the manufacture of industrial batteries. In a lead-acid industrial battery, each lead battery plate is wrapped with fiberglass matting to help retain the active material in…
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Cooling towers are built from several different materials: wood, metal, and plastics just to name a few. Each of these materials of construction has an inherent risk in its ability to ignite, sustain, and spread a fire event. To properly…
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The two most common polymers used in cooling tower fills and drift eliminators are polyvinyl chloride (PVC) and polypropylene (PP). Both materials offer the benefits of durability, compatibility with the water environments of most cooling towers and processes, and cost-effective…
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To answer this question, we must first start with the basics of drift eliminators. Drift eliminators aid in the removal of water droplets from an airstream in a cooling tower. They work by changing the direction of the airflow and…
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What is Lamella? Lamella, or lamellae, is a term frequently used when discussing sedimentation and clarifier design. Lamella clarifiers can be used in applications ranging from municipal water and wastewater treatment to various industrial applications. The primary benefit of utilizing…
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Due to several fire events that occurred in New York City and the difficulty of extinguishing flames on top of high-rise buildings, building codes have been revised in recent years to include detailed requirements for cooling tower fill combustibility. A…
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When evaluating which heat transfer media to install in a crossflow cooling tower, most options can be classified as a film fill or splash media. Film fill, either hanging sheets or bottom supported packs, are typically found in small to…
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