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This document summarizes a trial conducted at the Hornsby Heights Sewage Treatment Plant to test dosing methanol to tertiary filters to further reduce nitrogen levels before discharge. The trial showed some success, with nitrogen (measured as nitrate) decreasing by an average of 1.3 mg/L with a methanol dose of 10 mg/L to the filters. However, the trial had to be abandoned because the increased solids caused by the methanol dosing accelerated the rate at which the filters needed to be backwashed.

Author

JL Tenorio

Language

EN