IPEC has developed a high standard chemical scrubber for the removal of odour from sewage networks. This scrubber is marked by a high efficiency and a low chemical consumption. To obtain such a high performance in combination with a low consumption of chemicals, special attention is paid to the design of the scrubber:
- Sufficient contact-time in combination with a limited air velocity through the packed bed guarantees a low chemical consumption.
- A substantial recirculation flow to guarantee a good contact between air and water phase to induce the chemical reaction
- A new technology of dosing the chemicals. Chemicals are no longer dosed constantly with a constant bleed of unused chemicals. In IPEC scrubbers, the chemicals are dosed based on the actual need. Therefore, using a PLC there is a constant monitoring of the H2S level before and after the scrubber in combination with a monitoring of the pH of the recirculating liquid (and ORP monitoring in case of bleach dosing).
Several references in UGGC are there, the most recent are
Case Story: Chemical scrubber Jeddah South Pumping Station – Saudi Arabia.
Case Story: Combination of chemical scrubber and activated carbon: Ain Khalid – Qatar.