GHD reports membrane bioreactor test issue; phase‑2 contracts mostly on schedule
Consulting engineer Mark Greenville told the Mashpee Sewer Commission that a setting limiting carbon feed constrained nitrate removal in a recent membrane bioreactor performance test; the manufacturer adjusted the setting and a retest is expected in about two weeks. Several phase‑2 contracts are under way, with some linear work tracking a bit behind schedule but no long‑term concerns reported.
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Mark Greenville of GHD gave the commission a monthly engineering update, saying most work is proceeding and outlining a recent performance test issue in phase 1. "One aspect of the test did not quite achieve the levels that were necessary, and we had to troubleshoot that and figure out why that was," Greenville said, explaining that a carbon feed setting on the membrane bioreactor had been artificially constrained and was increased by the manufacturer; the team is redoing the test and expects results in roughly two weeks.
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