Solutions · Applications
Gas analysis by industry
Biogas, wastewater, recycling: three industries with three process chains. In each one, gases decide yield, safety and clean exhaust air. Here you can see where our process measurement technology measures and what you gain from it.
Gas analysis continuously measures the composition of a gas. It usually works extractively: a sampling line carries the gas to the device. The device stays protected outside the process. Which gases matter depends on the industry: methane and hydrogen sulphide in biogas, nitrous oxide and methane in wastewater treatment, refrigerants and oxygen in recycling.
Solutions · Biogas
Gas analysis for biogas plants
From the digester to grid injection: this page shows which gases matter at each point of your biogas plant. It also shows how process measurement technology from Fresenius Instruments keeps them reliably in view.
- 5measuring points with one BioBasic
- 5 gasesCH₄, CO₂, H₂S, O₂ and H₂ in raw biogas
- 1 smeasuring cycle in biomethane
- Biogas calculatorWhat is one percentage point of methane worth? Calculate with your plant’s own figures.
- BioBasicOne device for up to five measuring points. You calibrate just once a year.
- Interactive plant graphicFrom the digester to grid injection: the graphic shows which gas is measured at which point.
Solutions · Wastewater
Gas analysis for wastewater treatment plants
From the aeration tank to the CHP unit: this page shows which gases you should measure at each point of your wastewater treatment plant. It also shows which process measurement technology from Fresenius Instruments does the job.
- 7measuring points from aeration to exhaust air
- N₂O · CH₄ · H₂Sthe gases that matter most
- 2027Urban Wastewater Directive: account for N₂O and methane
- Off-Gas SystemThe system measures nitrous oxide and methane right at the aeration tank – with the Gas Dome 300 floating hood.
- Case study StockholmSeven measuring systems with the GA 220 and GA 320 send methane, nitrous oxide and CO₂ readings to the SCADA system.
- Seven measuring pointsFrom aeration to exhaust air: see where each gas is measured.
Solutions · Recycling
Gas analysis for recycling plants
Fridges, plastics, metal, batteries, organic waste or landfill: you bring materials back into the loop. Gases determine safety, recovery and clean exhaust air. Process measurement technology from Fresenius Instruments keeps these gases in view.
- Tracesrefrigerants down to the milligram range – in clean gas
- Raw gashigh concentrations right at the shredder, too
- 5material streams, one measurement partner
- Testing insulation foamWhich blowing agent is in the foam – R11, R141b or c-pentane? The Smart Control 300 identifies it at the robot.
- Inerting while shreddingThe measurement delivers the real oxygen value every second. So nitrogen flows only when it is needed.
- Five orders of magnitudeThe measurement covers refrigerants from raw gas at 300 g/m³ down to exhaust air from 2 mg/m³.
Your industry is not listed?
- We show biogas, wastewater and recycling in detail here. Our process measurement technology also measures gases in many other processes. Tell us about your measuring task.
- Our partner network covers what we do not measure ourselves, for example certified emission measurement or special analyses.
- Which gases, which measuring ranges, which measuring points? We use the technical information sheet to design the right solution together with you.
- Fresenius Instruments in Herten develops and builds its process measurement technology in Germany.
Advice
Tory – your advisor for every industry
Biogas, wastewater, recycling or something else entirely? Tory asks about gases, measuring ranges and measuring points in a few steps. Tory then takes you to the right solution or straight to a meeting with our team.
- The right solution for your industry
- Gases, measuring ranges and measuring points in a few steps
- Direct path to a quote request
FAQ
Frequently asked questions
In which industries is gas analysis used?
Wherever gases decide yield, safety or emissions. We show biogas plants, wastewater treatment plants and recycling plants in detail. Our process measurement technology also measures gases in many other processes.
Which gases are measured in biogas plants?
Methane, carbon dioxide, hydrogen sulphide, oxygen and hydrogen. They are measured in raw biogas at the digester, after desulphurisation and ahead of the combined heat and power (CHP) unit. Biomethane is checked before grid injection.
Which gases are measured in wastewater treatment plants?
Above all nitrous oxide, methane and hydrogen sulphide. They are measured at the aeration tank, in sewage gas and in the exhaust air. The Urban Wastewater Directive will require nitrous oxide and methane to be accounted for.
Which gases are measured in recycling?
That depends on the material stream. In refrigerator recycling, it is refrigerants and pentane. During inerting under nitrogen, oxygen is what counts. With batteries and metal, it is hydrogen. In organic waste and landfill, it is methane and carbon dioxide.
What does extractive gas analysis mean?
A pump draws the gas through a sampling line to the measuring device. The device stands protected outside the process or the hazardous area. At the measuring point, the gas is only extracted.
My industry is not listed – can you still help?
Very likely. Tell us about the gases, measuring ranges and measuring points. You can use the technical information sheet, talk to us or ask Tory, our digital advisor. Our partner network covers what we do not measure ourselves.
Which measuring task is next for you?
Tell us about your measuring task – we design the process measurement technology with you.
