The main purpose of wastewater screening equipment is to remove solid materials from the wastewater system. Solid materials can contaminate waterways, damage equipment, and reduce the overall efficiency of the system, which is why they must be removed at all costs.
In this guide, we’ll cover the different types of wastewater screens available, and give you tips on how to select the right one for your plant.
Types of Wastewater Screens
There are four major types of wastewater screens: rotary drum, in-channel, auger, and static. Let’s take a look at each type, how they’re designed, and what they’re used for.
Rotary Drum Screens
Rotary drum screens are incredibly versatile and offer superior solid recovery from waste streams. At JWC Environmental, we offer internally fed and externally fed drum screens. Internally fed drum screens handle pumped flow and are typically needed when there are higher flow rates. Externally fed drum screens offer 100% overflow protection and are best suited in plants with high oil or grease loadings.
Auger screens are particularly useful for high solid facilities and smaller water treatment plants. JWC offers an Auger Monster, which works off of gravity flow and is the perfect solution for businesses seeking an all-in-one grinder, fine screen, and compactor.
Wastewater screening is the first line of defense during the filtration process. If your design fails to meet industry standards, you may end up damaging and clogging your equipment every week.
If you’re not sure what factors to consider when searching for wastewater screening equipment, you’ll benefit the most from this next section.
How to Select the Right Wastewater Screen
When selecting screens, the first area you should focus on is the wastewater itself. Find out which contaminants are in the wastewater. In many industrial operations, fats, oils, and grease are common. However, you should also consider other contaminants, like salt, surface-active agents, and corrosive matter. If you don’t identify and understand the contaminants in the wastewater, you may experience screen binding/clogging.
The flow rate is also crucial. How fast or slow will the wastewater move through the screen? For best efficiency, make your decision based on the maximum flow rate possible.
Finally, decide how important the byproducts are. Many industrial applications need to screen specific particles out of the effluent to re-use for another purpose. It can be a massive revenue generator for your company. Once you’ve chosen the target size of the particles, you can choose an appropriate screen.
Contact JWC Environmental Today
Still have questions? JWC Environmental is here to help! We’ve been a trusted manufacturer of wastewater screening equipment since 1973. Based in the United States, we help clients around the globe, and are known for our innovative solutions.
Is your wastewater screening design struggling to meet industry standards? Are you experiencing clogged and damaged equipment on a monthly or even weekly basis? For starters, you should evaluate your preliminary treatment and identify the most effective wastewater screening design for your wastewater plant.
Your screening equipment plays a huge role in your wastewater system as it is the first line of defense to the filtration process. When removing objects such as rags, paper, plastics and metals, screening equipment prevents damage and clogging of downstream equipment.
The first step to replacing equipment will include distinguishing the correct metrics for your concentrations, conversions, head drops and screen sizes. To assist you in sizing and fitting your next wastewater screening design, JWC has created a Quick Reference to help you measure and convert your specs for screens and components. The different equipment calculations in our new quick reference guide include all of the specs necessary for installation. This user-friendly quick reference guide will help you to convert screen specs precisely in seconds!
Now that you have calculated the necessary specs, you will need to figure out the appropriate screen for your plant. JWC’s goal is to help you to treat your wastewater efficiently and effectively. JWC has carefully engineered wastewater screening systems for a number of applications that include drum, in-channel, auger and static screens for municipal and industrial placements. With so many choices, what wastewater screening system should you use? Let us break it down for you:
Rotary Drum Screens are installed in applications that contain flume waters, effluents containing moderate to low solid loadings, high flows or high solids loading zone. These screens are versatile and provide superior solids recovery from waste streams. JWC offers both internally fed drum screensand externally fed drum screens.
Auger Screens are a robust headworks solution that combines three of JWC’s finest technologies – a grinder, a fine screen and a compactor into one unit called the Auger Monster. This spiral screen removes trash and unwanted solids so the treatment plant runs more efficiently.
At JWC we offer a wide range of products that target unique challenges with wastewater treatment plants being a top priority. Drum screens, in-channel screens, auger screens and static screens are all used in municipal and industrial applications. The steps are simple, calculate your specs and choose your screen!
Get your Quick Reference Guide now! Click HERE to download.
JWC’s IPEC Rotary Drum Screen Used for Protection from Filter Clogging in Brewery Wastewater
Matt Brewing Co., which makes the Saranac brand of craft beer, is a picture of sustainability in the craft brewing community, using several energy-saving methods within their brewing process. While a lot of liquids end up in the beer, nearly 900 gallons of brewery wastewater flow through the system every minute, which includes tough, gritty spent hops. An on-site 200,000 equalization tank normalizes the flow of the wastewater and preconditions it before it is pumped to the company’s five anaerobic digester units. Organics in the digesters are used to create biogas composed of methane gas which are then used to power brewery operations. To help protect the heat exchanger before the digester the company was using a two-dimensional filter to capture the hops.
Unfortunately for the Matt Brewing staff the spent hops regularly clogged the filter, and operators had to clean it manually each time. After dealing with this hassle for years, the brewery team conducted research on alternative screening products. This led them to JWC’s IPEC internally fed rotary screen, which catches the spent grain brewery wastewater but allows the yeast to flow through to the anaerobic digester. Since the installation of the drum screen, Matt Brewing eliminated costly downtime due to filter maintenance, and hasn’t experienced any issues with their anaerobic digester as related to spent hops or grains.
In parallel with this project Matt Brewing also installed one of JWC’ IPEC PLB 1272 screw press conveyors for the drum screen discharge. The PLB takes the screen hops materials and compresses them for dryer, more compact discharge. The final dryness was in the 18-25% range.
Read about the details of Matt Brewing’s screening project here!
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