Title:

Controlling Hydrogen Sulfide Releases in Augusta, ME Sewers

Poster

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Abstract

The Greater Augusta (ME) Utility District is experiencing odor and crown corrosion issues with some of their long sewer trunklines. Wastewater microbes, including sulfur reducing bacteria, are consuming sulfur compounds in the water and as a result are creating excessive concentrations of hydrogen sulfide (H2S) in the sewer system. Hydrogen sulfide emits a pungent, rotten egg odor that is offensive to the residents of the Augusta area. Moreover, hydrogen sulfide gas emitted from the stagnant sewage can react with the moisture in the sewers generating sulfuric acid that subsequently corrodes the upper portion of concrete liners and ductile iron pipes, i.e., crown corrosion. Large sections of the extended sewer trunklines have demonstrated corrosion failures and need to be replaced. The senior project group investigated various treatment schemes to control hydrogen sulfide production in selected sewer trunklines to the Greater Augusta (ME) Utility District wastewater treatment facility. The treatment schemes were grouped into three categories as follows: (i) raising pH, (ii) raising oxidation-reduction potential (ORP), and (iii) raising both pH and ORP.

Authors

First Name Last Name
Shane Fillion
Gage Moran
Jessica Buhrle

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Submission Details

Conference URC
Event Interdisciplinary Science and Engineering (ISE)
Department Civil and Environmental Engineering (ISE)
Group Research
Added April 25, 2021, 6:04 p.m.
Updated April 26, 2021, 12:04 p.m.
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