Restricted Research - Award List, Note/Discussion Page

Fiscal Year: 2018

1335  The University of Texas at Arlington  (74840)

Principal Investigator: Melanie L Sattler

Total Amount of Contract, Award, or Gift (Annual before 2011): $ 474,723

Exceeds $250,000 (Is it flagged?): Yes

Start and End Dates: 5/23/17 - 5/23/19

Restricted Research: YES

Academic Discipline: Department of Civil Engineering

Department, Center, School, or Institute: College of Engineering

Title of Contract, Award, or Gift: Manhole Corrosion Protection Assessment

Name of Granting or Contracting Agency/Entity: City of Arlington Water Utilities

Program Title: N/A


The overall goal of this project is to lengthen the lifespan of manholes and pipes in the City of Arlington sewer by reducing chemical deterioration due to hydrogen sulfide, which will save the city money over the long-term. Specific project objectives and associated tasks are: Objective 1: To recommend changes in city manhole protection criteria to reduce hydrogen sulfide (H2S) corrosion. Task 1.   For over 300 manholes in various manhole categories, to measure parameters that cause H2S to form in the liquid phase and volatilize into the gas phase, as well as the amount of resulting corrosion. Task 2.  Using the data measured in Task 1, to determine the rate of corrosion for each manhole, and to build a model to predict corrosion rates based on significant contributing factors. Task 3. Based on the analysis conducted in Task 2, to specify in what circumstances manholes should be protected from hydrogen sulfide, and recommend any other changes in manhole design criteria that will reduce the potential for future corrosion. Objective 2: To recommend minimum slopes for each pipe size to prevent hydrogen sulfide generation and sedimentation. Task 1.   For manholes along the same stretch of main, for several mains, to measure liquid -phase parameters that contribute to hydrogen sulfide generation. At least 25 manholes will be sampled in this task. Task 2.  Using the data measured in Task 1, to estimate the slope necessary to minimize hydrogen sulfide generation for a given pipe flow and diameter.

Discussion: No discussion notes


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