NC0025321_SOC - March 2021 Quarterly Report_20220414

March 2021
Quarterly report as required by the SOC issued 12/20 pertaining to section 2 (b) 8. The last quarter
Overview for the WWTP. We were dealing with operational problems within the plant. Specifically issues
with the sludge removal capabilities for the secondary clarifiers. The aluminum construction of the
siphon system makes it very difficult to repair breakages. The outside western most secondary clarifier is
out of square and causes excessive wear on the guidance wheels that keep the siphon pulling straight.
We average replacing the wheels about once a month. ACMI did pull this unit out and attempted to
reweld some broken pieces and square the unit up. This was mostly unsuccessful. Due to the
construction of the Siphon.
McGill and Assoc. had the sludge digester inspected for structural integrity. The digester was cored
tested, with ACMI providing the core drilling. The lid of the anerobic digester was removed prior to this
and work is on going to compete the switch over to an aerobic digester.
In January the pilot study with the primary drum filters, conducted by Krugger began this study was
conducted for about 2 months. They tested different microns of filter media, looking at both BOD5
removal and TSS removal. The test concluded that this would be a practical low foot print alternative for
primary treatment.