Guide to Wastewater Screening Equipment

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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.

In-Channel Screens

If you find yourself in situations without a grinder, you may want to consider a gravity flow in-channel screen. We offer band screens, fine screens, automated bar screens, and chain and rake screens, which all feature unique designs. All options can provide incredible benefits to your wastewater screening process.

Auger Screens

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.

Static Screens

JWC offers sidehill static and sidehill pressure screens. These types of screens are primarily used for trapping smaller debris. They’re the best option for those seeking lower operating costs and easy installs.

Why Selecting the Right Screen Matters

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.

You can view our full line of products here. If you need help selecting the right wastewater screen, contact us today to speak with one of our ISO-certified specialists.

Auger Monsters®: How to Improve Operational Efficiency & Increase Longevity

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Screw Screen

Auger Monster: The industry pioneer of wastewater screw screens.

The Auger Monster is an all-in-one screw screen equipment system that combines three technologies — a grinder, a fine screen and a compactor. This unit is designed to efficiently collect, clean and convey solids out of the waste stream channel.

As with most Muffin Monster® equipment, the Auger Monster, is definitely a beast of burden & engineered to last. And with today’s waste stream environment, proper maintenance is key to ensure your screw screen equipment is running at optimal efficiency & as long as possible without major issues.

3 tips to help you get the most out of your Auger Monster.

  1. Set up a proper Inspection Schedule

Inspecting screw screen equipment on an annual basis, will help reveal what items are nearing the end of their lifespan before finding out the hard way. Typical wear parts on an auger, include cutters & auger brushes. As an example, 18 – 24 months is a typical lifespan that can be expected on wear items such as auger brushes. But an Auger Monster rotor can last 10 or more years with proper care & protection from the grinder. Many factors affect the lifespan of the equipment, such as grit, wastewater type, as well as the presence or absence of the grinder. An inspection schedule will allow you to stay on top of areas that could be detrimental later on.

  1. Test Test Test

Periodically running functional testing of screw screen equipment can help identify what component requires more attention. Our Auger Monster, is comprised of a grinder, a finescreen, a compactor and a control panel. (In some cases you may not have a grinder present). Each technology, is crucial to the success of the all in one screw screen system. We recommend reviewing each component’s mechanical & electrical efficiency on a regular basis.

  1. Check your run time cycles

Run time cycles can vary from site to site & from season to season. Getting to know those variables & adjusting equipment to those conditions will provide with the best discharge. In general, a forward bias consisting of short forward cycle durations with even shorter to no reverse cycle durations works best by allowing for increased spray wash contact time as well as minimizing brush wear. 20 seconds is a typical forward cycle duration and a good start. The cycle duration is programmable and can easily be adjusted to best suit the conditions of the specific site

While the Auger Monster is designed for a wide range of installations, site specific conditions may affect the wear of the equipment differently. Schedule a call with our service team & get an assessment over the phone. Our team is trained to help guide you through what to look for in your specific model. The above tips are highly recommended to ensure this beast of burden is providing optimal service &  increase the longevity of your Auger Monster.

Do you have an Auger Monster? Read our MONSTER FAQ: Auger Monsters Post HERE.

Auger Monster FAQ

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Auger Monster FAQ

You Asked, We Answered

The Auger Monster® is one of our more robust and affordable wastewater screens. This Monster has been dubbed our triple threat as it combines three of JWC’s proven technologies – a grinder, a finescreen and a compactor. The Auger Monster helps treatment plants run more efficiently and makes life easier for operators and managers by pre-conditioning, screening, removing, and compacting trash and unwanted solids from the waste stream. The cleaner, more compact discharge keeps odors to a minimum and lowers disposal costs by minimizing the amount of retained moisture and fecal material sent to the landfill. With the Auger Monster, wastewater screening couldn’t get any easier—it’s the only solution that’s all-in-one!

First, a powerful Muffin Monster® or Channel Monster® grinder pre-conditions the wastewater solids by shredding them into a manageable size that increases surface area, thus preparing the solids for cleaning and removal. The solids are then captured by a perforated screening trough and removed by a rotating auger. As solids are removed, dual spray bars clean off fecal material, returning it to the waste stream. Lastly, the auger then conveys the cleaned solids to the discharge point where the integrated compactor section (optional) squeezes out additional water before discharging the cleaned and dried material into a dumpster.

FAQ

Q: Does the auger “need” to have a grinder in front?

A: Although the Auger Monster can be configured without the grinder, the grinder’s ability to pre-condition the solids greatly improves overall performance by protecting the auger from damage caused by large solids and increasing the surface area of the solids. The increased surface area allows the spray wash to more effectively remove the soft organics (fecal) and return them to the waste stream for downstream processing. The overall result is cleaner, drier, and more compact solids in the dumpster.

Q: What size solids can go through the auger without damaging it?

A: In general, if a solid is small enough to fit between adjacent spiral flights, it will transport up. However, with a grinder installed, larger solids can be processed without worry of damaging the auger or being able to be transported up.

Q: How often do I have to replace the brush?

A: Many factors affect the lifespan of the auger brush, such as grit, wastewater type, as well as the presence or absence of a grinder. However, 18 – 24 months is a typical lifespan that can be expected.

Q: What should I set my auger run cycle at?

A: In general, a forward bias consisting of short forward-cycle durations with even shorter to no-reverse cycle durations works best by allowing for increased spray wash contact time as well as minimizing brush wear. Twenty seconds is a typical forward-cycle duration and a good start. The cycle duration is programmable and can easily be adjusted to best suit the conditions of the site.

Q: What options are there for catching the discharged screenings?

A: JWC provides site-specific solutions for screenings discharge. There are many different configurations available and are typically decided during initial design. Most popular options include a bagging system or a discharge chute to an easily accessible dumpster. Retrofit kits are available to add a bagging system as well.

Q: How long does the auger spiral last?

A: There are many variables that impact service life (materials of construction, run times, preventative maintenance, etc.). On average, an Auger Monster rotor can last ten or more years with proper care and maintenance.

Q: Does JWC offer any type of preventative maintenance agreement?

A: Yes, JWC offers an annual maintenance agreement for all types of its Engineered Systems. Key components are inspected, rotating equipment is lubricated, grinders are inspected, brushes are inspected and controls are optimized for current site conditions. An agreement can be customized to meet your site’s requirements. Reach out and learn more about your specific model and get a specific plan put together for your needs! CLICK HERE.

NOTE: There are many variables that impact the service life of any of our Monsters. Before diagnosing the equipment, we encourage our Monster customers to reach out directly to get the full history of your unit. We are always ready and available to talk through your specific model’s needs.

If you have any questions we haven’t been able to answer here, we’d love to hear from you! Please submit your questions in our ASK AN EXPERT section of the website and we’ll add them to the list! Keep checking back here for new questions!

Headworks for Smaller Plants – Beyond the Manual Bar Screen

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Wastewater bar screen or manual bar screen replaced with Auger Monster at Headworks

Wastewater Bar Screen – Not the Only Option

Water treatment facilities in smaller towns and villages, as well as treatment works supporting institutions, prisons, resorts or remote facilities, have difficult choices to make when selecting a headworks system. All require a solids control strategy, but lower flows and smaller budgets limit the available equipment options.  The historical choice in this situation has been a wastewater bar screen or a raked manual bar screen – but there are better options.  The days of sending an operator with a rake and bucket to the headworks for the daily cleaning duties should be a thing of the past.

A number of different types of equipment can be used to meet these objectives, yet public works engineers should not make that choice lightly. There is not a one-size-fits-all solution that can be applied to every headworks situation. Matching the needs of the facility to the appropriate screen or debris reduction method is paramount for both protecting downstream equipment and ensuring screened out solids are handled efficiently and effectively. The wrong choice can result in headworks systems that do not meet the required level of protection of downstream treatment processes, or a system that is too costly for the plant’s requirements.

This article explores the options for wastewater engineers and plant operators trying to strike the right balance between technology and the available funds while optimizing the plant’s efficiency.  If provides guidance on alternatives to the traditional manual bar screen while not overdesigning a system.

Click here to Read the Full Article

New Vertical Auger Monster Screen Fits Inside Pump Stations

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Vertical Auger Monster

The new Vertical Auger Monster captures flushable wipes & protects pumps.

Wastewater pump stations are facing an influx of sewer clogging rags and debris, so JWC Environmental engineers developed a breakthrough Vertical Auger Monster® screening system to fit inside cramped pump stations and provide complete pump protection.

Once installed, Auger Monster model AGV safely and easily screens, cleans and conveys rags and debris straight up and out of the sewer system. This gives collection system managers an affordable new way to remove rags before they can clog sewage pumps and eliminate the wasted time and expense of de-ragging a pump.

The vertical Auger Monster is attached to the wall of the pump station next to the influent pipeline and captures rags, wipes, plastics and trash before they get inside the wet well. The screen is custom built to fit each site and can screen up to 1 million gallons per day (158 m3/h). It can also be installed as a headworks screen for a small treatment plant or lagoon system.

“The 90° Auger Monster opens up a whole new series of applications,” said Rob Sabol, Director of R&D for JWCE. “It fits into a tight footprint to provide complete pump protection by capturing, cleaning and removing rags and trash.”

Even small trash such as cigarette butts can’t escape the Auger Monster. A high-capture rate screening basket with ¼” (6mm) circular openings stops the debris and the rotating auger lifts it to ground level. The patented compaction zone compresses and dewaters material before dropping it into a plastic bag or bin ready for landfill disposal.

Auger Monster model AGV offers these unique features: a Muffin Monster® grinder to shred material so it is easier to wash, convey and compact; a spray wash system removes soft organics and puts it back in the wastewater flow where it belongs, and the compaction zone reduces the volume of material so fewer trips to the landfill are needed.

“The terrible problem with ‘flushable’ wipes in the sewer system requires creative and affordable solutions,” said Scott Kelly, Vice President of Sales and Marketing. “The new vertical Auger Monster screen is the solution collection systems managers will like –it’s affordable, operates automatically and makes pump stations reliable once again.”

Our new vertical screen joins a complete family of Auger Monster screening systems. While AGV screens at 90°, models ACE, AGE and ALE are installed at 35° or 45° for high flow screening. The Auger Monster is popular in the wastewater industry because it incorporates an entire headworks system into a single package – a rugged Muffin Monster® or Macho Monster grinder, screen, washer, conveyor and compactor. It’s an affordable screening solution for small and medium-sized treatment plants with flow rates up to 10 million gallons per day (1,600 m3/h).

Request a quote today >

Auger Monster is also an award-winning technology – winning the Water Environment Federation’s prestigious Innovative Technology Award in 1997.