Disinfection of a Mineral Water Well
Project description:
Pseudomonas bacteria were identified in a new mineral water deep well during the validation phase. HPC was asked to carry out a root cause analysis. To rule out external sources for the contamination, e.g. construction deficits or a previous earthquake, a video inspection of the whole well and a geophysical integrity test were conducted. The well was then cleaned by brushing using disinfection agents. Pump and rising mains were cleaned and disinfected and were reinstalled under hygienic conditions. A new pump was inspected for its hygienic condition before installation.Reason:
- Root cause analysis with the aim for a lasting elimination of a contamination with Pseudomonas Aeruginosa bacteria
Services:
- Planning, consulting and project management
- Development of a tiered catalog of measures and procedures for hygienic handling of well equipment
- Identification of experienced subcontractors
- Training of staff and subcontractors on site
- Supervision of the video inspection and the geophysical integrity log and interpretation of the results
- Visual inspection of pump and rising mains and wipe tests. Identification of suspicious material used by the pump manufacturer
- Assistance and supervision during the well cleaning as well as during the cleaning, disinfection and reinstallation of pump and rising mains
Advantages:
- Optimized processes due to central coordination
- The structural integrity of the well could be confirmed
- Contamination source was identified and eliminated
- The plant learned hygienic procedures for the installation, removal and storage of their production equipment
Additional project data:
- Mineral water well is 750 m deep
- An abandoned well is 25 m away, tapping the same aquifer system
- Installed equipment was reportedly disinfected by local staff prior to the installation
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