ZC4000 Odour Filter Unit Installation at Hamilton Siphon Renewal Project, Brisbane

Queensland Urban Utilities (QUU) contracted McBerns to help solve odour issues during pipe work maintenance in the tunnel connecting Hamilton to Bulimba. Maintenance work was expected to take up to 7 months.

Client and Company: Queensland Urban Utilities

Location of Project: Hamilton Siphon Renewal Project

Contract Date: May 2014 to November 2014.

Description of Project: Supply and installation of ZC4000 odour filter (south side) and 2 x ZC1200 odour filters (north side). Treating average H2S gas concentration of 50ppm.

It was recommended to install a ZC4000 Odour Filter at the shaft entry for a large diameter siphon which transports sewerage under the Brisbane River and two ZC1200 Odour Filters on the other side of the river.

SITE LOGISTICS
The site was located in a heavily populated area and required major repairs to the sewage main in the siphon tunnel, it was necessary to have constant extraction of dangerous gases. McBerns recommended the installation of a ZC4000 extracting 260 l/s would provide a safe environment for the repair works to be carried out on the Southern side of the river and two ZC1200’s extracting 200l/s on the North side.
The site had a 20 metre deep shaft which allowed access to the large diameter siphon and pipework. During the repair work it was necessary to divert all odour emissions through  the Odour Filters to prevent odorous gases escaping into the surrounding area.

INTSALLATION
The ZC4000 unit was installed at ground level and was extracting and treating H2S gas from a 20m deep vertical shaft. The high capacity odour filter was commissioned for the duration of a pipe renewal project. It was extracting over 200L/s, 24 hours per day and has resolved the odour issues at the site.
It is a 2-stage odour filter unit using a combination of filtration media that adsorb and treat the odour emissions. The larger capacity allows for the processing of higher volume air flows in excess of 200l/s and high concentrations of H2S.

SCOPE OF WORK ON SOUTH SIDE- BULIMBA
1. Logging at the two sites in conjunction with QUU staff.
2. Transport & Crane hire to position the ZC4000 filter unit.
3. Arrange electrical connection to filter unit.
4. Install 150 mm PVC pipe duct work across site and down into the siphon tunnel to a depth of 16m.
5. Commissioning and continued weekly monitoring for the duration of the project.

SCOPE OF WORK ON NORTH SIDE- HAMILTON
1. Logging at the two sites in conjunction with QUU staff.
2. Transport & Crane hire to position the two ZC1200 filter units.
3. Arrange electrical connection to filter unit.
4. Install 150 mm PVC pipe duct work across site and down into the siphon tunnel to a depth of 16m.
5. Commissioning and continued weekly monitoring for the duration of the project.

As this was a sensitive project odour loggers were positioned on the perimeter of these sites as well as the entrance of the siphon where the source of the odour was emitting. Both sites were monitored and reported on whilst the repairs were undertaken.

Client

QUEENSLAND URBAN UTILITIES