Digester Cleaning with Significant Sand and Solids Build-up in California

CHALLENGES

BACKGROUND

SOLUTION

APG approached cleaning the digesters at both plants the same as we do with all digesters. While not having a clear understanding as to how this work was completed in the past, APG has been able to clean the digesters in less time and has completed the work to date ahead of the client’s desired schedule and quicker than any competitors have done in the past.

After APG was awarded the project, the client requested a change: taking the dewatered solids to beneficial reuse locations rather than a landfill. APG was able to identify a compost facility that would accept the material and change the transportation contractor with minimal effect on schedule, and with a reasonable increase the client was willing to accept. APG is continuing to identify other compost facilities to accept the dewatered material to provide redundancy for the end use of the dewatered solids. This allows the material to be reused beneficially as opposed to taking up space in a landfill, which was a big win for the client.