Which gases can be measured with CHEMEC GAS?
The focus is on different gases and measurement ranges depending on the industry. Today, our sensors can already measure methane, carbon dioxide, oxygen, nitrogen, hydrogen sulphide, hydrogen and VOCs in various concentrations.
In future, more gases will be added. In principle, we always measure methane, carbon dioxide and oxygen during a fermentation process in agriculture, in municipal and industrial wastewater treatment plants as well as in waste recycling. The plants differ with respect to hydrogen sulphide and hydrogen:
Agriculture
In agriculture, biogas is usually directly converted into electricity, i.e. electricity is generated using a combined heat and power plant. Coarse desulphurisation is often carried out by adding a small amount of oxygen, biological desulphurisation and fine desulphurisation with an activated carbon filter. Activated carbon filters require a low oxygen content in the biogas for their function. The hydrogen measurement specifies the control of the fermentation process.
Typical methane content: 50 to 60 vol%
Measurement ranges
Hydrogen sulphide: : typical measurement range 0 to 1,000 ppm.
Hydrogen: measurement range 0 to 5,000 ppm.
Municipal waste treatment plants
The sewage gases generated in municipal wastewater treatment plants are usually also converted into electricity. Iron compounds are usually used for coarse desulphurisation, and activated carbon filters are also used for fine desulphurisation.
Typical methane content: 60 to 80 vol%
Measurement ranges
Hydrogen sulphide:
Measurement range from 0 to 1,000 ppm for domestic wastewater.
Measurement range from 0 to 10,000 ppm for domestic and industrial wastewater.
Hydrogen: does not play a major role at the moment, but that may change.
Waste management fermentation plants:
The biogas is converted into electricity; either iron compounds or biological desulphurisation is used for coarse desulphurisation. Activated carbon filters are used for fine desulphurisation. Occasionally, the plant also encompasses hydrolysis.
Typical methane content: 60 to 70 vol%
Measurement ranges
Hydrogen sulphide: : measurement range 0 to 10,000 ppm, an additional range of 0 to 1,000 ppm may be appropriate
Hydrogen: measurement range 0 to 5,000 ppm
Industrial wastewater treatment plants in the paper, pharmaceutical or food industries
Process heat is usually obtained from these sewage gases. Industrial wastewater treatment plants often process substrates with a high sulphur content, i.e. we have high H2S concentrations. Scrubbing processes are usually used for coarse desulphurisation, and activated carbon filters for fine desulphurisation. For the H2S measurement we recommend two measurement ranges, one for coarse desulphurisation and one for fine desulphurisation.
Typical methane content: 60 to 80 vol%
Measurement ranges
Hydrogen sulphide: : measurement range 0 to 10,000 ppm, an additional range of 0 to 1,000 ppm may be appropriate
Hydrogen: measurement range 0 to 5,000 ppm
Open to all questions: stay in touch
Do you want to know what is possible or have questions and would like a non-binding advice? The best way is an initial conversation. We will be happy to help you with personal advice.
Chemec GmbH
Meisenstraße 96
33607 Bielefeld
Germany
Phone +49 521 2997-430
Fax +49 2997-431