Process equipment

Equipment that has been constructed by SIRRA typically includes strippers and scrubbers, droplet separators, small clarifiers, and various reactors. Apparatus is constructed tailor-made to the requirements of customers and the intended purpose of the item in question. The principal materials are weldable polymers, but also stainless and acid resistant steels are used. The advantage of using polymers is, beyond their moderate cost, their excellent chemical resistance. Equipment is constructed from pilot plant scale up to small industrial scale. Shown below are some examples of equipment that has been constructed by SIRRA.

Pilot plants

With pilot plants a process idea can be brought closer to industrial application than is possible with laboratory glassware. SIRRA’s apparatus is constructed very close to the way in which its full scale process plant equivalents are constructed, thereby showing, for example, the dynamics and capacity of the process, crystal sizes and habits, encrustation, and other features that are not revealed with glassware. When it comes to clarifying studies, transparent equipment can be constructed which allows a visual observation to be made of the progress of sedimentation where this would not otherwise be possible in industrial plants, and it also allows samples to be taken at various depths. Shown below are plants for stripping and absorption, which are applied in research into the removal of ammonia from biofuels.

Environmental protection

SIRRA’s process equipment can also be used in environmental protection work, such as cleaning gas streams or the clarification of moderately-sized waste water streams. Exhaust points, such as ventilation tubes in acid or ammonia tanks, gases from small scale processes, or equipment cleaning and sterilisation, or even sewer gas or laboratory emissions, occasionally give the plant operator a bit of a headache. Hazardous waste water may be generated, the stream not being large enough to motivate the procurement of large-scale sewage treatment plants. In many cases SIRRA can supply equipment with a reasonable relation between cost and the size of the stream that needs to be cleaned. The chemically durable and low cost polymer materials, in combination with SIRRA’s production technique, make this possible. Contact us, and we can discuss in confidence the chemistry involved and the appropriate apparatus that may be required.


Equipment is also supplied for educational purposes. Shown below is a multi-functional bioreactor and a heat exchanger system (tube and plate).


The equipment is constructed mainly from weldable polymers such as polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), and other materials. In certain cases polyvinylidene difluoride (PVDF) can be used, or non-weldable Teflon. These polymers show excellent levels of chemical resistance, and their temperature range extends from -40oC to +140oC. With Teflon, even higher temperatures can be reached, but the use of this material is limited by its non-weldability. If transparency is required, thereby allowing as visual follow-up in a reactor, then transparent PVC, polyacrylate, or polycarbonate can be used. Occasionally glass is used in combination with the polymers.


We also construct equipment of acid resistant and stainless steel. The main rule is the right material to the right place. In elevated pressure and high temperature as well as i mechanical stress steel is often the only possible material. Typical uses are columns, agitators, support and suspension bars and machinery. For pilot scale plants TIG is the most widely used welding mehtod.

 Reference list

 Year Customer Equipment Substance Use
2023 AflyScrubberHCLEnvironmental protection
2023 Välinge Innovation AbScrubberTitanium dioxideEnvironmental protection
2023Atria/Suomen TeollisuuskylmäScrubberAmmoniaSafety
2022Viking Malt/Adven Scrubber and tankAmmoniaSafety
2022Fiskarsin kiertotalous OyScrubberAmmoniaEnvironmental protection
2022Fiskarsin kiertotalous OyStorage tankAmmonium sulphateProduction
2021Sooma OyReactorGelProduction
2021Nordtreat OyReactorWood impregnationProduction
2021Fazer Lappeenranta/Suomen TeollisuuskylmäScrubberAmmoniaSafety
2021Fazer Lahti/Suomen TeollisuuskylmäScrubberAmmoniaSafety
2020Fazer Vantaa /Suomen TeollisuuskylmäScrubberAmmoniaSafety
2020Fazer Vantaa /Suomen TeollisuuskylmäScrubberAmmoniaSafety
2019Inex/Adven Scrubber and tankAmmoniaSafety
2019SciTech-Sevice OyReactorOzoneResearch
2018Vantaan EnergiaFiltration plantWaste waterEnvironmental protection
2018Pöyry Finland Oyj Gas sampling tankGasesAnalysis
2017Sooma OyReactor GelProduction
2017HK Scan/AdvenScrubberAmmoniaSafety
2015ABBPiping and tank system, demoWaterExhibition
2014Nextrom OyScrubber HF-offgasesEnvironmental protection
2014Stadin AmmattiopistoBioreactorMicrobesEducation
2014Stadin AmmattiopistoHeat exchangerWaterEducation
2014Ductor Oy Stripping plant, pilotAmmoniaResearch
2014Ductor Oy Stripping plant, lab scaleAmmoniaResearch
2014MTT (Luke) Stripping plant, pilotAmmoniaResearch
2012Lulekraft AbScrubberHydrochloric acid fumesEnvironmental protection
2010Metso (Valmet) Stripping plant, pilotH2S Research