Biogas Desulphurisation Scrubber 250 m³/h – H₂S 2500/100 ppm
€ 82.000,00
Biological desulphurisation using a conventional biotrickling scrubber is a proven technology that has been successfully used for many years to remove hydrogen sulphide (H₂S) from biogas, sewage gas and landfill gas. The process is also known as microbial desulphurisation.
The H₂S-containing biogas passes through a tank filled with packing material. Microorganisms colonise the surface of the packing material and oxidise hydrogen sulphide in the presence of oxygen to elemental sulphur and sulphates.
By adding nutrients for the microorganisms and continuously circulating the process liquid, sulphur and sulphates are removed from the system. The resulting sulphur- and sulphate-containing process liquid can be discharged to the inlet of a wastewater treatment plant or, in biogas plants, to digestate storage.
Microorganisms of the Thiobacillus (Thiooxidans) type are used. These bacteria are chemolithotrophic and use carbon dioxide as their carbon source. They require oxygen for their metabolism, which is supplied in the form of air.
The air supply is regulated according to the biogas flow rate. A 4–20 mA signal from the biogas flow measurement is required for this purpose. Process air is supplied by a blower whose capacity is controlled by a frequency converter.
The scrubber tank is manufactured from PP (polypropylene). Due to the low pH of the circulating liquid, all process piping in contact with the medium is manufactured from corrosion-resistant plastic materials such as PVC, PP or PE.
The control cabinet and complete process equipment are installed in a PP technical room. A separate ATEX safety shutdown system is installed outside the technical room.
A major advantage of biological desulphurisation compared with activated carbon filters or chemical scrubbers is that no additional chemicals such as NaOH or H₂O₂ are required for H₂S removal. Only small quantities of nutrients for the microorganisms are required.
The system achieves an H₂S removal efficiency of 96% and reduces the H₂S concentration from 2,500 ppm to ≤100 ppm.
Technical Details
Standard scope of supply
Biogas flow rate, operating m³/h:
250
Biogas flow rate, Nm³/h:
228
H₂S concentration at inlet, ppm:
2500
H₂S concentration at outlet, ppm:
100
H₂S removal efficiency, %:
96
H₂S mass load, kg/h:
0,94
H₂S removal load, kg/h:
0,9
Pressure drop, mbar:
5-8
Operating pressure, mbar:
40
Gas connection DN, mm:
150
Scrubber volume and quantity, m³:
36 х 1
Diameter and height, mm:
2300 × 9000
Packing material volume, m³:
30
Water consumption, max. l/h:
95-105
Water connection:
DN25
Nutrient consumption, kg/day:
1,6
Installed electrical power, kW:
8
Average electricity consumption, kWh/h:
6
Process air addition, % of raw biogas flow:
11-14
Heating capacity / connection, kW / DN:
30 / DN32
Technical Details
Biogas flow rate, operating m³/h:
250
Biogas flow rate, Nm³/h:
228
H₂S concentration at inlet, ppm:
2500
H₂S concentration at outlet, ppm:
100
H₂S removal efficiency, %:
96
H₂S mass load, kg/h:
0,94
H₂S removal load, kg/h:
0,9
Pressure drop, mbar:
5-8
Operating pressure, mbar:
40
Gas connection DN, mm:
150
Scrubber volume and quantity, m³:
36 х 1
Diameter and height, mm:
2300 × 9000
Packing material volume, m³:
30
Water consumption, max. l/h:
95-105
Water connection:
DN25
Nutrient consumption, kg/day:
1,6
Installed electrical power, kW:
8
Average electricity consumption, kWh/h:
6
Process air addition, % of raw biogas flow:
11-14
Heating capacity / connection, kW / DN:
30 / DN32