Wastewater treatment
and biogas plants

At this type of plant gas detectors are needed typically for the detection of methane, hydrogen sulphide and petrol (gasoline).

In connection with ATEX risk assessment you determine where an explosive mixture might potentially occur.
This would typically apply to digesting tanks, gas treatment systems, sludge drying, etc.

Petrol (gasoline) detectors are often used at treatment plants in connection with inlet works in order to detect possible oil/petrol (gasoline) leaks in the sewage systems.

Hydrogen sulphide is formed in connection with decomposition of organic matter under anaerobic conditions – occurring e.g. in sewers and pump wells. Hydrogen sulphide is extremely flammable and very poisonous even at low concentrations.
Please also read the Geopal news "Hydrogen sulphide - the silent killer"
Symptoms arising from breathing H2S
0,0003-0,02 ppm Distinct smell
3-10 ppm Very offensive smell
20-30 ppm Strong odour of rotten eggs
30-100 ppm Foul, sickening sweet stench
50-100 ppm Makes your eyes smart
100-200 ppm The sense of smell is deadened
250-500 ppm Accumulation of fluid in the lungs (pulmonary oedema), coughing up bloody sputum
500-1000 ppm Breathing failure, death
Kalundborg biogas plant
Maarbjerg Energy Center
Aalborg biogas plant
Dragør biogas plants
Contact Us 
You are always welcome to contact us by telephone +45 45670600, or via the form below.
Geopal System A/S | Skelstedet 10B | DK-2950 Vedbæk | Tlf: +45 45 67 06 00| E-mail: info@geopal.dk