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Rotating belt filtration for Plant Optimization

 
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key details:

Technology: EcoBelt Rotating Belt Filtration for Plant Optimization

Key Advantages:

  1. Reduce BOD by 20-40%,
    TSS by 30-80%
  2. Treat in 5% of the space
    required by conventional clarification
  3. Use less energy than other
    rotating belt filters
  4. Automated self-cleaning cuts
    85% of routine maintenance

Applications:

  • 0.1-50 MGD plant-optimizing primary treatment
  • Increases plant capacity by reducing solids, nutrient, and BOD loading to subsequent processes
  • Replaces failing clarifiers with efficiency in a small footprint
  • Removes grease, oils, and fats using patented WaterKnife process

Case Studies:

  • Valparaiso IN
  • Wilmington VT
  • Pocahontas WV

Your challenge: Increasing your plant’s capacity

Reduce loading to your secondary treatment processes: If your biological process is underperforming and your tertiary effluent is inconsistent as a consequence, discover how well your plant can run when half the load is removed at the front end.

Save space, time and money: Finding the real estate for another clarifier is not always an option, and even if the land is there, building one requires substantial capital expenditures.

Our technology: EcoBELT

Nexom is the exclusive source for the EcoBELT™, the simple, powerful primary treatment solution for optimizing your plant’s function. The EcoBELT takes the concept of a rotating belt filter (RBF) and enhances it with energy saving features and an ease of maintenance not found on other filters.

Why do you need an EcoBELT? Before you spend millions of dollars to get marginal oxygen-transfer improvements in secondary treatment, consider what would happen if you could halve your loading at the front end. It’s possible, and you won’t have to turn the neighborhood baseball diamond into a clarifier farm.

Implementing an EcoBELT has been shown to:

  • Reduce 30-80% of the TSS and 20-40% of the BOD that finds its way into secondary treatment systems, improving the plant’s ability to perform BNR
  • Use approximately 5% of the footprint of an equivalent clarifier
  • Feed your anaeroabic digester with fluid primary solids containing the highest raw energy content, or
  • Dewater primary solids with the optional integrated screw press for disposal at the nearest landfill.
 

How it works

 
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Look inside the EcoBELT

EcoBELT™ removes solids using a continuous-loop fine mesh belt screen. As the screen moves it acts as a conveyor and carries solids out of the incoming wastewater. The patent-pending cleaning system discharges the solids from the belt screen and deposits them into the screenings hopper. Periodic hot-water flushes further clean the belt screen by removing oil and grease that may accumulate over time. An optional screw press dewaters the collected screenings to between 20-40% dry solids while screened wastewater continuously passes through the unit.

How does it save energy? Where other RBFs use a air-based belt cleaning device that must run a high-energy blower constantly; the EcoBELT’s Doctor Blade is a mechanical solution taking advantage of the momentum of solids on the belt. It uses no additional energy and saves up to 80% of the system’s overall energy input when compared to similar filters.

Quick question:

How long does a belt last?

Belts used in the EcoBELT are specially-designed to last twice as long as many of its competing belts. While impacted by factors including types of pretreatment in the plant configuration and belt loading, belts last 2 years on average. And though belt replacement is infrequently required, the EcoBELT is designed to make it a smooth exercise for plant operators. Nexom's team trains operators to swap out the EcoBELT belt in 30 minutes (other RBFs take 6-8 hours). Don’t risk having another RBF’s belt fail during peak flows; with EcoBELT you’ll be back online 16x faster! 

 

What it delivers

 
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EcoBELT optimizes your plant with minimum energy, maintenance

The EcoBELT™ successfully reduces TSS and cBOD5, but its purpose is greater; it exists to improve the function of the entire plant in a small footprint with a whole-lifecycle cost that is a fraction of what conventional clarification could cost.

Want to know what EcoBELT could do for your system?

Submit your RFP today and our on-staff professional engineers can help you size and design an EcoBELT rotating belt filtration system to optimize your plant and meet your wastewater treatment requirements.

 

FAQs

 
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Is a coarse screen required before the EcoBELT™?

While numerous sites have chosen to implement the EcoBELT without a preceding bar screen, to maximize the life of the belt we recommend implementing a 2” coarse screen upstream.

How does the lifecycle cost compare to clarifiers?

Although there are far too many variables that can impact such a comparison, in many cases opting for an EcoBELT can result in significant cost savings over conventional clarification.

How does the EcoBELT reduce waste and disposal?

Unlike other RBFs, which use a flapper gate through which solids exit the process (with the associated backpressure issues), the EcoBELT’s patent-pending integration of a backpressure cone allows solids to exit consistently while also ensuring solids are reliably dewatered, resulting in less waste and less disposal.

How does the EcoBELT achieve maximized belt-life by using mechanical cleaning?

The EcoBELT uses the Doctor Blade as part of the cleaning process, which results in drastically reduced energy costs as compared to blower-based cleaning. Unlike the scraper blades on all other RBFs, our Doctor Blade is adjusted to a tight tolerance to lift and peel the solids off the belt without actually making contact with the belt. Meanwhile, any inherent strains imparted to the belt during operation are offset by the EcoBELT's patent-pending, engineered belt support structure pattern. The belt support not only creates the maximum open area enabling more of the belt to be used for filtration, but also mitigates the stresses that lead to failure caused by rod-support lattices.

In practice, the EcoBELT has demonstrated belt life that is equal or greater than any other RBF belt available. And no system makes it easier or faster to replace a belt, with changes taking 30 mins as opposed to the 6-8 hr process other systems require.

How does the EcoBELT achieve redundancy?

In applications where redundancy is required, multiple isolatable EcoBELT belt drives can be installed within the same unit.

Have a question that didn't get answered here?

Contact one of our product specialists (or your local Nexom rep) and we'd be happy to answer it.