Food Engineering logo
  • Sign In
  • Create Account
  • Sign Out
  • My Account
  • NEWS
  • PRODUCTS
  • TOPICS
  • EXCLUSIVES
  • MEDIA
  • FOOD MASTER
  • EVENTS
  • RESOURCES
  • EMAGAZINE
  • SIGN UP!
cart
facebook twitter linkedin youtube
  • NEWS
  • Latest Headlines
  • Manufacturing News
  • People & Industry News
  • Plant Openings
  • Recalls
  • Regulatory Watch
  • Supplier News
  • PRODUCTS
  • New Plant Products
  • New Retail Products
  • TOPICS
  • Alternative Protein
  • Automation
  • Cannabis
  • Cleaning | Sanitation
  • Fabulous Food Plants
  • Food Safety
  • Maintenance Strategies
  • OEE
  • Packaging
  • Sustainability
  • More
  • EXCLUSIVES
  • Plant Construction Survey
  • Plant of the Year
  • Sustainable Plant of the Year
  • State of Food Manufacturing
  • Top 100 Food & Beverage Companies
  • MEDIA
  • Podcasts
  • Videos
  • Webinars
  • White Papers
  • EVENTS
  • Food Automation & Manufacturing Symposium and Expo
  • Industry Events
  • RESOURCES
  • eNewsletter
  • Custom Content & Marketing Services
  • FE Store
  • Government Links
  • Industry Associations
  • Market Research
  • Classified Ads
  • EMAGAZINE
  • eMagazine
  • Archive Issue
  • Advertise
Food Engineering logo
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
Food Engineering logo
  • NEWS
    • Latest Headlines
    • Manufacturing News
    • People & Industry News
    • Plant Openings
    • Recalls
    • Regulatory Watch
    • Supplier News
  • PRODUCTS
    • New Plant Products
    • New Retail Products
  • TOPICS
    • Alternative Protein
    • Automation
    • Cannabis
    • Cleaning | Sanitation
    • Fabulous Food Plants
    • Food Safety
    • Maintenance Strategies
    • OEE
    • Packaging
    • Sustainability
    • More
  • EXCLUSIVES
    • Plant Construction Survey
    • Plant of the Year
    • Sustainable Plant of the Year
    • State of Food Manufacturing
    • Top 100 Food & Beverage Companies
  • MEDIA
    • Podcasts
    • Videos
    • Webinars
    • White Papers
  • FOOD MASTER
  • EVENTS
    • Food Automation & Manufacturing Symposium and Expo
    • Industry Events
  • RESOURCES
    • eNewsletter
    • Custom Content & Marketing Services
    • FE Store
    • Government Links
    • Industry Associations
    • Market Research
    • Classified Ads
  • EMAGAZINE
    • eMagazine
    • Archive Issue
    • Advertise
  • SIGN UP!
Supplier News

Automatic Scraper Strainers Protect Membrane Systems

Scraper strainers ACME Engineering

Examples of scraper strainers from ACME Engineering Products.

June 27, 2022

The use of membrane technology as a processing and separation method in the food industry is gaining wide application for demineralization, desalination, stabilization, separation, deacidification, purification, and reducing microbial load. 

Perhaps the most obvious application for membrane filtration is reducing dissolved or suspended solids from process water or liquid ingredients. However, membrane filtration can be used to remove microorganisms to prolong shelf-life and provide a healthier option than utilizing additives and preservatives.

Membrane separation can also be combined with cold pasteurization and sterilization techniques to create products and ingredients with favorable characteristics. Since membrane separation eliminates the need for heat temperature treatment of products, it can preserve the natural taste of food products and the nutritional value of heat-sensitive components. Less energy is also required. 

Membrane processing plays a key role in wastewater treatment, as well. Wastewater derived from food production varies depending on the type of food (animal processors/rendering plants, fruit/vegetable washers, or edible oil refiners). By implementing membranes, the separated substances and clean water are recoverable.

The challenge for food processing facilities is that membrane systems are delicate and can be easily damaged or subject to excessive maintenance due to large particulates in the water. A pre-filtration step eliminates this risk by removing oversized suspended solids to prevent damage, eliminate unnecessary maintenance, and reduce the cost of premature membrane replacement.

Among the pre-filtering options available, automatic self-cleaning scraper strainers are increasingly popular because they are affordable, require very minimal maintenance or attention, and can remove solids down to 75 microns. The strainers allow for continuous, uninterrupted flows even during blowdown cycles. When compared to filters that must be manually cleaned or even conventional backwash systems, automatic scraper strainers can save substantial costs on maintenance and membrane replacement.

Industrial Water Treatment and Membrane Systems

Although various filtration methods use membranes, the most mature is pressure driven membrane filtration, which relies on a liquid being forced through a filter membrane with a large surface area. Depending on the size and type of the particles involved, the process could be categorized as reverse osmosis, nanofiltration, ultrafiltration, or microfiltration.

In general, reverse osmosis is used to produce potable water or deionized water. Ultrafiltration and microfiltration are increasingly used in water and wastewater treatments. 

In industrial applications, water treatment is also vital to protect downstream equipment from fouling, scaling, corrosion, and other forms of damage or premature wear due to contaminants present in the source water. For these reasons, cooling tower and boiler feed water are generally pre-treated. 

Membrane filtration is also utilized to treat non-potable water sources such as gray water and reclaimed/recycled “purple pipe” water. 

Because the membranes are made using thin, porous sheets of material, failing to sufficiently pre-filter any large, suspended particles from the water can cause severe damage and fouling – leading to premature replacement and unnecessary maintenance, according to Robert Presser, Vice President of Acme Engineering Prod., Inc., a North American manufacturer of industrial self-cleaning strainers.

 “Most membrane filter manufacturers recommend that all influents be pre-screened from 100 to 500 microns to maintain membrane filter efficiency,” says Presser, whose company is an ISO 9001:2015 certified manufacturer of environmental controls and systems with integrated mechanical, electrical and electronic capabilities.

He adds that automatic scraper strainers are typically installed before the intake plenum of membrane filters, after the supply pumps.

Extending Membrane Life

As an alternative to sand filters, centrifugal separators, and basket type strainers, automatic scraper strainers provide superior membrane protection while drastically reducing required maintenance.

Automatic scraper strainers like those from Acme Engineering can provide continuous removal of suspended solids to comprehensively protect membrane systems. The automatic units are motorized and designed to continually remove suspended particulates in industrial process water and wastewater to the specific size required down to .003 inches (75 microns).

Conventional manual strainers can become clogged quickly due to limitations in straining area. When that occurs, cleaning or media replacement is required, which increases maintenance costs. The other alternative for fine straining is automated backwash-style strainers of various designs. As particle sizes grow larger, however, large contaminants can jam up the backwash system or remain in the body of the strainer, requiring manual removal and interruption of the process flow.

With the automatic scraper strainer, cleaning is accomplished by a spring-loaded blade and brush system, managed by a fully automatic control system. Four scraper brushes rotate at 8 RPM, resulting in a cleaning rate of 32 strokes per minute. The scraper brushes get into the wedge-wire slots and dislodge resistant particulates and solids. This approach enables the scraper strainers to resist clogging and fouling when faced with large solids and high solids concentration. It ensures a complete cleaning and is very effective against even organic matter “biofouling.”

With this type of system, manual maintenance for cleaning is eliminated. Blowdown occurs only at the end of the intermittent scraping cycle when a valve is opened for a few seconds to remove solids from the collector area. Liquid loss is well below 1% of total flow. 

With so much to gain, food processors should consider selecting an automated, self-cleaning system that is essentially “set-and-forget,” where automatic scraper strainers comprehensively protect delicate membranes and allow personnel to focus on other aspects of the facility.

KEYWORDS: scraper strainer water filtration water management

Share This Story

Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!

Recommended Content

JOIN TODAY
to unlock your recommendations.

Already have an account? Sign In

  • Global Organic Food & Beverage Market to Grow

    Global Organic Food & Beverage Market to Grow

    With a CAGR of 12.07%, Bonafide Research estimates this...
    People & Industry News
  • skilled MEP worker

    Predicting Food and Beverage Manufacturing Trends for 2024

    The two words that should be kept in mind are labor and...
    Automation
    By: Derrick Teal
  • cleaning and sanitation

    The basics of cleaning and sanitation in food plants

    Sanitation maintains or restores a state of cleanliness...
    Cleaning | Sanitation
    By: Richard F. Stier
close

1 COMPLIMENTARY ARTICLE(S) LEFT

Loader

Already a Registered User? Sign in now.

Subscribe For Free!
  • eMagazine
  • eNewsletter
  • Online Registration
  • Manage My Preferences
  • Customer Service

OT Cybersecurity Vulnerabilities in Food Manufacturing Facilities

OT Cybersecurity Vulnerabilities in Food Manufacturing Facilities

Understanding Impacts of OT Cybersecurity Events in Food Manufacturing

Understanding Impacts of OT Cybersecurity Events in Food Manufacturing

Food Plant Openings and Expansions April 2025

Food Plant Openings and Expansions April 2025

FA&M 2025 in Rewind

FA&M 2025 in Rewind

More Videos

Popular Stories

Conagra Logo

Conagra Brands to Sell Chef Boyardee Brand to Hometown Food Company

Salt

FDA to Amend Standards of Identity to Include Salt Substitutes

Vilter IHP in plant

Industrial Heat Pumps: Sustainable Energy Solutions for Now and the Future

CHECK OUT OUR NEW ESSENTIAL TOPICS

Alternative ProteinAutomationCleaning/SanitationFabulous Food Plants

Food SafetyMaintenance StrategiesOEE

PackagingSustainability

Events

June 5, 2025

Mass Customization Driving Innovation in the Food and Beverage Industry

The food and beverage industry is at the nexus of transformative global manufacturing trends, driving a shift toward personalized, customer-centric solutions. 

June 5, 2025

How Cafe Spice Uses Automation to Propel Private Label

Learn about Cafe Spice’s new, state-of-the-art, highly automated manufacturing facility in Beacon, New York. 

View All Submit An Event

Products

Recent Advances in Ready-to-Eat Food Technology

Recent Advances in Ready-to-Eat Food Technology

See More Products

Plant of the Year

Related Articles

  • Consumers are looking for specifics on labels

    Labeling’s new normal

    See More
  • annual plant construction survey

    FOOD ENGINEERING’s 45th annual plant construction survey

    See More
  • Apple orchard

    Today's sorting and grading solutions help apple packhouses meet operational challenges

    See More

Related Products

See More Products
  • food engineering.jpg

    Handbook of Food Engineering, Third Edition

  • cleaning-in-place

    Cleaning-in-Place: Dairy, Food and Beverage Operations, 3rd Edition

  • vegetables.jpg

    Handbook of Vegetables and Vegetable Processing, 2nd Edition

See More Products
×

Elevate your expertise in food engineering with unparalleled insights and connections.

Get the latest industry updates tailored your way.

JOIN TODAY!
  • RESOURCES
    • Advertise
    • Contact Us
    • Food Master
    • Store
    • Want More
  • SIGN UP TODAY
    • Create Account
    • eMagazine
    • eNewsletter
    • Customer Service
    • Manage Preferences
  • SERVICES
    • Marketing Services
    • Reprints
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • YouTube
    • X (Twitter)
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2025. All Rights Reserved BNP Media.

Design, CMS, Hosting & Web Development :: ePublishing

Food Engineering logo
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
Food Engineering logo
  • NEWS
    • Latest Headlines
    • Manufacturing News
    • People & Industry News
    • Plant Openings
    • Recalls
    • Regulatory Watch
    • Supplier News
  • PRODUCTS
    • New Plant Products
    • New Retail Products
  • TOPICS
    • Alternative Protein
    • Automation
    • Cannabis
    • Cleaning | Sanitation
    • Fabulous Food Plants
    • Food Safety
    • Maintenance Strategies
    • OEE
    • Packaging
    • Sustainability
    • More
  • EXCLUSIVES
    • Plant Construction Survey
    • Plant of the Year
    • Sustainable Plant of the Year
    • State of Food Manufacturing
    • Top 100 Food & Beverage Companies
  • MEDIA
    • Podcasts
    • Videos
    • Webinars
    • White Papers
  • FOOD MASTER
  • EVENTS
    • Food Automation & Manufacturing Symposium and Expo
    • Industry Events
  • RESOURCES
    • eNewsletter
    • Custom Content & Marketing Services
    • FE Store
    • Government Links
    • Industry Associations
    • Market Research
    • Classified Ads
  • EMAGAZINE
    • eMagazine
    • Archive Issue
    • Advertise
  • SIGN UP!