• Deep Clean-In-Place: 10 Key Benefits of Dry Ice Cleaning – #10



    Dry Ice Blasting cleaning in place


    Dismantling your plant and getting it outside your critical hygiene zone for deep cleaning, is a right royal pain in the proverbial. Right?


    Furthermore, the first few hours of off-production time is lost in waiting for the plant to be cool enough to work on.

    Then any sensitive equipment has to be covered up before cleaning begins; there goes another hour or two!

    You can see where we are going with this…

    Wouldn’t it be great to have a method of deep cleaning that doesn’t require all this drama of dismantling your plant first.


    Here are three key deep Cleaning-In-Place problems that dry ice blasting solves:


    1.  No cool down required

    As soon as production stops, dry ice blasting can immediately commence. The greater the temperature difference between the surface to be cleaned and the frozen CO2 gas pellets the dry ice blasting uses for cleaning, the greater the effect. Thermal shock is a key element of physics that allows dry ice blasting to be such an effective cleaning method. Soil on a hot surface, even if baked on, reacts more to the -78 degrees Celsius temperature of dry ice than soiled that has been cooled.  Plus, the cleaning effect is amazing. Soil just falls off!


    2.  No protection required for sensitive equipment

    Instead of spending time and resources covering up sensitive electrical componentry or seals that are easily damaged with traditional cleaning procedures (especially pressure washing), dry ice blasting allows you to commence cleaning as soon as production stops. With zero water involved, only 100-150 psi of pressure and a cleaning media with the abrasive characteristics of a snowflake, no sensitive equipment will be harmed in the cleaning of your plant.


    3.  No secondary waste introduced to food contact areas

    Because there is zero water, chemicals, abrasives or fibres being used in the cleaning process, you can get restart production immediately after dry ice blasting is finished. There is no foreign matter introduced. There are no cleaning residues. The food product build up that you are cleaning off simply falls to the ground where it can be vacuumed, swept up or rinsed away.


    N.B. The three points above require a skilled dry ice blasting operator to achieve the results described.


    If you are interested in finding out more about how dry ice blasting can reduce your production down time, contact Matthew Prestidge at Presco Environmental – matthew@presco.co.nz

  • The What, Where + How of Kitchen Grease.



    Kitchen grease dripping down exhaust system


    What is kitchen grease?

    Kitchen grease is the sticky residue that creeps its way around our kitchens, filling every crack, coating every surface, until suddenly we realise we are drowning in a thick yellow danger zone.  It is the bane of any chef’s life, but no matter how hard we try, none of us can escape it. 


    Where does kitchen grease come from?

    If it seems like this dreaded filth appears from everywhere, that’s because it does!  Roasting.  Cooking.  Baking.  Frying.  That’s about as greasy as you can get.  Evidently, every common form of cooking will disperse some amount of grease into your precious breathing air.  Different cooking methods discharge different amounts of grease.


    Heavy discharge:  Char grill, Wok tables, Griddle plates

    Medium discharge: Countertop Units, Deep Fryers

    Low discharge: Combi Oven, Oven Ranges



    evidence of incomplete duct clean
    Examples of grease coating kitchen extraction system interiors.


    Why is it a problem?

    Grease is nearly impossible to get rid of problem-free.  When washed down the drain, large amounts can build up and solidify, causing unsightly blocked drains.  This can result in unattractive sewer backups and overflows.  Even if drains don’t block, grease coats pipe interiors and decreases capacity.  This means water systems need to be cleaned, or even replaced, far more frequently than desired. 

    However, not all kitchens wash their grease down a drain.  Unfortunately, cleaning filters in a dishwasher can be just as agonising.  Grease from the filters sneaks up to coat the drains and pumps, causing a slow, painful death for your hard-working appliance.  Alternatively, washing the grease into a trap is an expensive pastime that can cost up to x every time you have to clean it out. 

    Lastly, what no one but duct cleaners discuss, is the detriment grease brings to extraction systems.  It shrouds the fan, decreasing efficiency.  It coats the entire ducting.  And it spills out onto the roof, creating one disgusting mess.  Meanwhile, anything over 2mm of grease build-up is plenty of fuel to burn down an entire kitchen in minutes, should a spark catch it alight! 


    How to deal with kitchen grease.

    But…it’s not all as doom and gloom as it sounds.  Every kitchen owner has to deal with grease and that is why we are so thankful for ways that eradicate the pain. 

    The easiest place to deal with grease is in the filter.  This way, it doesn’t enter the duct requiring expensive cleans and creating colossal fire risk.  It doesn’t attach itself to every surface in the entire kitchen.  It doesn’t hang in the air making staff hesitant to inhale. 


    Shepherd Filters are an innovative solution to all your kitchen grease nightmares.  They are natural, woollen, disposable, compostable, fire retardant and can capture up to 98% of airborne kitchen grease, compared to the 20-40% of a standard filter. 

    Learn more about them on our blog or view the product page here.

  • YOU’D BLAST MY BABY?! Non-Abrasive: 10 Key Benefits of Dry Ice Blasting – #8




    Whoa, whoa. Whoa. I’m talking about your pride and joy vehicle, not your child. But yes, if you’re keen on a demo, I’d happily Dry Ice Blast the paintwork of your pride and joy set of wheels.


    Now, that’s to say I’d take it all right down low and use the gentle end of Dry Ice Blasting’s capability settings – I’m not too keen on footing a re-paint bill on a luxury car!

    The point I’m making is that Dry Ice Blasting can be extremely gentle on any substrate being cleaned. All other forms of blasting media are abrasive to a greater or lesser degree.

    So what relevance does this have to the food and beverage industry, you rightly ask?

    Great question! The thing is that Dry Ice Blasting (blasting with frozen CO2 gas pellets,) is a VERY effective cleaning method yet is 100% non-abrasive.

    It’s really one of those things that need to be seen to be believed.


    In the meantime, here’s 7 ways that the non-abrasive nature of Dry Ice Blasting can benefit food and beverage producers:


    1. Bearings. You’re not going to sand blast around bearings, are you? (Unless you plan to replace them.) Dry Ice pellets disappear on impact (sublimate is the scientific term,) so there is no residual abrasives forced inside the bearing roller tracks to chew them out in the next few hours of operation. Happily Dry Ice Blast all around your rotating plant without any worries about destroying bearings in the process.
    2. Seals. Much the same point as with bearings, rubber seals do not co-habit with abrasives. Instead of spending hours disassembling plant to blast clean it, Dry Ice Blasting lets you clean right over rubber seals without any chance of cutting the rubber or pushing abrasives past the seal – what are you going to do with all those hours you have just shaved of your maintenance shut down?!
    3. Labels. Yes, the plant will come up beautifully clean with sand blasting, soda blasting or bead blasting but WHOOPS, you’ve just lost all of those important labels and stickers. Oh dear – who remembers what pipe/wire goes where now? Dry Ice Blasting can be so gentle that you can remove heavy stuck on soil, yet retain stickers and labels. (A little disclaimer here: in untrained hands, Dry Ice Blasting can remove stickers unintentionally too – but who is talking about using untrained operators?!)
    4. Glass. I am not joking – Dry Ice Blasting will not mark glass windows, panes, gauges or screens. Think of throwing snow at your car window screen – you get the picture. (Again, in the hands of an untrained operator, the ultra-low temperature of Dry Ice Blasting, -79 deg. celsius, can cause problems with glass. So do engage an experienced contractor, please!)
    5. Plastics. All of those meters and meters of plastic conveyor and guides, all those knobs and handles and feet, all those switches, all those plastic covers and panels, Dry Ice Blasting can clean them all without leaving a mark. Oh, the time you’ll save over against manual scrubbing – what did you say you were going to do with this spare time again?!
    6. Nozzles. Glue and Ink nozzles are notorious for getting a heavy build-up of the said glue or ink all around them. But these are sensitive components – get your blasting gun away from them, you exclaim! Good news, folks put away your scrubbing brushes! The hours and hours of manually cleaning these components with solvents and/or hot water have gone the way of the dinosaur. Dry Ice Blasting is aggressive enough to remove this build-up without any damage to the precise nozzles.
    7. Electrical components. Now, this is simply amazing. In the right hands, Dry Ice Blasting can clean all over and around electrical components, wiring, sensors and inside electrical cabinets. And that’s not all, it can do this LIVE! Forget spending hours covering up sensitive components. Forget having to leave insides of electrical cabinets dirty. Forget having to manually clean in sensitive areas. Dry Ice Blasting has just made your life much, much easier. “Quantum change” springs to mind.



    I’ll say it again in case you missed it before; in untrained hands, Dry Ice Blasting can cause problems with the sensitive surfaces listed above. Despite that, Dry Ice Blasting stands out head and shoulders above all other blasting methods as being NON-ABRASIVE.

    If you need a little more cleaning effect than elbow grease, hot water or solvents yet don’t want to mark or damage the plant you’re cleaning, I highly recommend talking to your local Dry Ice Blasting contractor.

    And for all those hours and hours that you’ll cut from your maintenance plan…..you’re welcome 🙂

  • REDUCE YOUR PLANT DOWNTIME: 10 key benefits of Dry Ice Blasting – #7




    Any food manufacturing plant can only run for so long before the product quality drops out of specification and then it’s time to stop the plant for a deep clean.

    This plant down time is a necessary evil, right? If you keep running the plant you will be producing SECOND-GRADE product and if you shut down for cleaning you will be producing NO product.


    Dry Ice Blasting can make you a better plant manager.


    Bringing in an experienced and qualified Dry Ice Blasting contractor to assist with deep cleaning is one of the best options available to a Plant or Process manager trying to increase their plant up-time.


    Here are some of the best the reasons why:

    No waiting for the plant to cool down

    The greater the difference in temperature between Dry Ice (-79˚C) and the surface being cleaned, the greater thermal shock and effectiveness of the Dry Ice Blasting process in removing the soil. This means instead of waiting for the plant to cool down, you get the best result by getting straight into Dry Ice Blasting as soon as you have shut the plant down.


    Less dismantling and reassembling of the plant

    In most situations, components of the plant can be cleaned in place or certainly cleaned inside the production hall, instead of having to disassemble and take outside the plant to a wash bay. This is because there is no chemicals or high pressure water being used that can push contamination deep inside the plant. A big time saver as well as less wear-and-tear on the plant and less manual handling. Win-win-win!


    No drying time

    Absolutely no dry out time involved. Dry Ice is frozen CO2 gas. On impact, the Dry Ice pellets sublime back into gas and do not go through the liquid phase – no moisture involved. (I should warn that the cold dry ice can cause condensation on steel surfaces – this is something an experienced Dry Ice Blasting contractor will know how to control.) For a dry product plant, this is huge! As soon as the cleaning is completed, production can commence.


    No secondary waste to clean up and dispose of

    Apart from the soil that has been cleaned off the plant and has fallen to the ground, there is nothing else to clean up. No dirty water, no chemical residue to rinse off, no dirty cloths or tools to clean up/ and dispose of. Nothing!


    By reducing the time and activities on the shoulders of the actual cleaning time, Dry Ice Blasting reduces the total cost of cleaning substantially.

    A Quick Win

    If you are in a position of having a lot of time and staff for for cleaning, then this may not be your biggest concern. In that case we should probably be having a different conversation about over-capacity in your resourcing. However, in my experience, most plant managers are looking for ways of increasing the output from their plant. Increasing production up-time with Dry Ice Blasting is a quick win that I recommend you look into if you haven’t already.

  • SANITIZE AS YOU CLEAN: 10 key benefits of Dry Ice Blasting – #6



    Dry Ice Pellets


    Sanitizing food preparation surfaces after cleaning them is Food Safety 101, right?


    The extra sanitizing step usually involves mixing a chemical solution at the correct dilution rate, applying the sanitizing solution to the cleaned surfaces via a sprayer or foamer, ensuring the sanitizer stays wet on the target surface for the correct dwell time, rinsing the surface thoroughly (although there are non-rinse sanitizers available for the food industry these days,) and finally waiting for the surface to dry again.

    What effect would it have on your bottom line if your cleaning process cleaned AND sanitized in one pass?!


    Dry Ice Blasting sanitizes as it cleans


    Because Dry Ice is super cold, (-79˚C,) Dry Ice Blasting instantly kills and removes bacteria (such as Salmonella, E-Coli, Listeria,) from the surface of an object, disinfecting, sanitising and decontaminating all in one pass. And, because the cleaning process is totally dry, you are not introducing moisture which promotes bacteria growth.



    Want to read more? Here is a report from Cold Jet

    The Cold Jet system has been shown to be effective in cleaning and disinfecting various food grade surfaces. It has a distinct advantage over conventional cleaning and disinfection techniques in that there are no chemical residues left behind after treatment, and no chemical wastes to treat and dispose of. As it stands, the Cold Jet system could be used now to disinfect food processing operations, preferably after an initial removal of gross debris. 

    If you are looking to optimize a cleaning process at your food production plant, Dry Ice Blasting as a cleaning and sanitizing method is a great place to start.


    Want more information on Dry Ice Blasting?

    Read Matthew’s SlideShare article dry-ice-blasting-what-is-it-and-how-does-it-work or download our basic guide to Dry Ice Blasting.

  • DRY & NON-CONDUCTIVE: 10 key benefits of Dry Ice Blasting – #5



    Technician dry ice blasting electrical equipment


    Water and electricity don’t mix.


    But as we all know that doesn’t mean electrical plant and equipment doesn’t get dirty and need cleaning up from time to time. This has always proved a difficult and time-consuming process, until Dry Ice Blasting…..


    Non-Conductive, moisture-less cleaning.

    Dry Ice Blasting solves the challenges of cleaning on or around electrical, live and sensitive plant.  As widely documented in the industry, Dry Ice Blasting is one of the best cleaning methodologies for:


    Electric Motors

    Cleaning with Dry Ice Blasting allows electric motors to be cleaned in place, saving time and money through reduced labour and plant downtime. The dry process means no secondary media waste (no water or chemicals), no drying out time required and minimal clean up. The non-abrasive nature of dry ice cleaning means no damage to small parts.



    Dry Ice Blasting is ideal for cleaning electrical generating equipment, reducing overheating issues and improving output efficiency. Dry Ice Blasting also allows the units to be cleaned in place without damage to cables and insulation.


    Insulators & Switches

    With Dry Ice Blasting, dirt accumulation that can cause arc overs is removed with no equipment downtime. Because the process is dry, there is no requirement to dry out the equipment after cleaning and greatly reduced chance of corrosion from moisture


    Cable Trays

    cable trays

    Dry Ice Blasting is the answer to cable tray cleaning. Cleaning with dry ice removes accumulated dirt, dust, grit and other foreign materials simply and efficiently without damage to the cable insulation from solvents or cleaning tools.


    Stator and Rotor Cleaning

    Dry Ice Blasting quickly removes carbon deposits from winding’s and other dirt build up on the stator and rotor. Oil and greases are removed from the bottom of the rotor without damage to the insulating coatings.



    • Dry on contact. There is no dry out process required.
    • No secondary waste. No disposal issues.
    • Faster and more thorough than other cleaning methods
    • No potential damage to any components.
    • Cleaned in place. Reduced downtime
    • No power outage
    • Instant energy savings/output improvements
    • Safe for equipment
    • Safe for the environment
    • Safe for employees


    Images from : Cyroservices LLCCarboBlackwellseecue.com 

    Presco Technician Daniel dry ice blasting factory pipes

    Our #1 hygiene goal in food production is to eliminate pathogens.  With standard cleaning, the water used helps to create an environment where pathogens can survive.  This is why dry ice blasting is perfect for the F&B industry; it is a waterless cleaning technology.  No water, no moisture to support pathogens.
    No water also has two other benefits to production – it is dry and non-conductive.
    As the name says, dry ice blasting is a dry method of cleaning, therefore no time is wasted waiting for your factory to dry out before resuming production.  
    Waterless cleaning also makes dry ice blasting non-conductive, meaning it is perfect for cleaning around or inside electrical cabinets, wiring and sensitive equipment.  


    water droplets on steel surface


    Dry ice blasting can clean your plant while it is still hot.  This removes the time spent waiting for your plant to cool down.  
    What’s more, the greater the contrast between the extreme cold (-78°C) of dry ice and the temperature of the surface being cleaned, the more effective the process is.  Because of this, dry ice is actually most effective when cleaning a hot surface. 



    Besides dry ice blasting, every other method of cleaning produces some kind of secondary waste.  Dry ice blasting works through a process called sublimation, where the frozen CO₂ returns to gas as soon as it hits a surface.  This means the dislodged waste from the surface is all that is left to sweep up.  
    Why is this perfect for food producers?  No secondary waste means no chemicals, no dirty water, no soiled consumables and no worrying about removing these foreign material before they contaminate your product.


    Contact us today to see how dry ice blasting can help in your factory. 

    0800 PRESCO (773726)

  • CLEAN WITHOUT CLEAN-UP: 10 key benefits of Dry Ice Blasting – #1



    zero secondary waste




    Try this.

    Close your eyes and make a picture in your mind of heavy-duty industrial cleaning.

    So what was your picture?

    Chances are it included something like guys in hard hats and hi-vis overalls water blasting (hydro-jetting) or steam cleaning, using powerful chemicals, or maybe even sand-blasting ?

    Yes, all of these cleaning methods are used routinely on industrial sites.

    They all have one common problem – they create secondary waste.  Dealing with secondary waste on most industrial sites is a real headache.  It can’t be released into waterways or put into the ground, it often must be collected up and disposed of at an approved waste facility – all rather costly.



    This amazing cleaning methodology dislodges the soil and then disappears!

    Too good to be true?  No it isn’t.  You’ve got to see it in action to believe it.  Watch a short video clip from Clean-co Systems, Houston, USA demonstrating this here



    Here’s how it works:

    The Dry Ice pellets (frozen carbon dioxide pellets the size of grains of rice) are fired at the target surface via compressed air, similar to sand blasting. But unlike sandblasting, on impacting with the surface, the Dry Ice pellets instantly change from a solid into a gas (a process called sublimation) and disappear literally into thin air.

    So the soil is dislodged and falls to the floor but the cleaning agent simply disappears.

    No dirty water, chemicals, abrasive sand/grit, rags, brushes, scourer pads or residue of any kind.

    Sweep up the soil – job done!

    Now that’s sustainable cleaning!

  • COMPLETELY CLEAN, CHEMICAL-FREE: 10 key benefits of Dry Ice Blasting – #3
    Technician dry ice blasting


    We’ve all grown used to powerful solvents, alkalies and acids being used for industrial cleaning.  

    Yet they have so many associated health risks that you’d think that in this day and age of Health and Safety compliance they’d be gone!

    The fact is, some things just can’t be cleaned without them, right?

    If this is how you’ve thought up until now, let me introduce you to a little secret called ” Dry Ice Cleaning“.


    How it works:

    Diagram showing how dry ice blasting works


    Dry Ice pellets (frozen carbon dioxide pellets the size of grains of rice) are fired at the target soil via compressed air, similar to sand blasting. But unlike sandblasting, on impacting with the surface, the Dry Ice pellets instantly change from a solid into a gas (a process called sublimation) and disappear literally into thin air.

    The soil and impurities are dislodged and fall to the floor but the cleaning agent simply disappears.

    Too good to be true?  No it isn’t.  You’ve got to see it in action to believe it.  Watch a short video clip on this web page demonstrating Dry Ice cleaning



    dangerous chemicals symbol

    Many cleaning tasks that traditionally involved use of hazardous chemicals can be now cleaned using dry ice cleaning, eliminating the chemical hazards that have caused so many acute and chronic health issues over the years.

    The cleaning agent (frozen carbon dioxide) is a naturally occurring gas, essential for plant life.  Apart from use in confined spaces, (where additional ventilation or breathing apparatus may be required,) CO2 cleaning is completely harm free.


    No chemical clean up:


    This image has an empty alt attribute; its file name is 0-16.jpg

    The other problem with cleaning using chemicals, is what to do with the waste?

    Used chemical cleaning solutions can’t always just be tipped down the drain, they often need to be collected up and transported to an approved disposal site.  Any used cleaning cloths are contaminated and often end up in plastic bags in the trash, adding to the landfill problem.  And then the chemical containers themselves must be triple rinsed and taken to an approved waste facility.

    Is any one actually calculating the cost of all this into their chemical cleaning program?

    Dry Ice Blasting removes all of these problems and their associated costs.


    No chemical residue:

    This image has an empty alt attribute; its file name is 0-17.jpg

    So what about a surface that has been cleaned with chemicals?  Even with careful rinsing, how easy is it to achieve a 100% chemical-free surface again?

    Chemical residue is a plague.  More and more we are learning about the long term effects of chemical residue on our bodies. 

    If you’re involved in the food and beverage industries, chemical residue is one of the #1 enemies.

    Dry Ice Blasting effectively cleans soil from a surface and leaves zero residue.


    The chemical-free sanitizing effect:

    This image has an empty alt attribute; its file name is 0-18.jpg

    Due to it’s super cold temperature, (-78˚C,) dry ice cleaning has a sanitizing effect while it is cleaning a surface.  Bacteria, mould and fungi is killed upon impact. 

    And, because the cleaning process is totally dry, you further inhibit bacteria growth.

    When you clean with Dry Ice Cleaning, you’re also sanitizing.

     Read more about bacteria and pathogen control with Dry Ice Cleaning at Dry-ice blasting stops food pathogens cold By Jenni Spinner+, 06-Jun-2014

    Go to the next level with your organization’s sustainability goals.  Don’t just reduce your reliance on hazardous chemicals, go chemical-free with Dry Ice Cleaning

  • ZERO WATER: 10 key benefits of Dry Ice Blasting – #2



    Technician dry ice blasting



    Water has go to be the most common cleaning medium on the planet – right?

    And for good reasons. It’s cheap, readily available (in most developed countries anyway) and completely non-toxic/non-hazardous.




    Okay, the obvious answer here is (no prizes for getting this one right folks,) when cleaning around ELECTRICITY or sensitive electronic equipment – not a good mix at all!  

    The next common reason for avoiding a water wash down is the ENVIRONMENT – where does the dirty water go? Usually down the drain, right? So for anyone that cares about (or has to comply with regulations covering) what gets into the storm water or ground water, water wash down can cause major headaches, including surprise visits from the authorities, court hearings, fines, jail….. you get the picture here.


    Then there is the reason I’m most passionate about reducing water use in cleaning is for BACTERIA or PATHOGEN control. Bacteria needs moisture to exist so cleaning with water provides one of the keys for life to resident bacteria (not to mention the introduction bacteria floating about in the water you are cleaning with!) Further, pressure washing with water causes splash back and despite the best of care, can cause clean areas to be re-infected by dirty, bacteria-laden water being splashed back over them.

    Powder dryer diagram


    In a ‘dry process’ environment such as a milk powder dryer, cleaning with water creates the unwanted downtime of having to ‘dry’out the plant before production can resume. With Dry Ice Blasting, the moisture-less cleaning means the production can recommence immediately after cleaning.



    So here’s the solution – straight forward and simple: DRY ICE BLASTING

    Dry Ice cleaning uses compressed air to propel frozen carbon dioxide (CO2) pellets at the surface being cleaned. The dry ice pellets freeze the soil/dirt (dry ice is -78 degrees Celsius, that’s negative seventy eight!) which causes it to loose adhesion, shrink and crack and then simultaneously dislodges the soil due to it’s kinetic energy and miniature explosive effect of the frozen CO2 instantaneously turning back into gas (a process called sublimation.)

    Phew, that’s all a bit of a mouthful but that is what actually happens and the results are amazing. I love watching clients faces as they see this in action!


    The soil falls to the ground, the surface is cleaned without damage, there’s no water to clean up, no chemical residue or empty chemical containers to deal with, no dirty cloths.

    Watch a short video clip of Dry Ice Blasting in action on this web page


    Oh, and did I mention, water is ultimately the scarcest resource on the planet?!


0800 773 726
06 278 0712
PO Box 530, Hawera, 4610
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