Smoke testing is a common diagnostic tool used to locate sources of inflow and infiltration in a sewer system. Smoke testing has been around for many years, but little information is available to help municipalities understand what to expect during such testing. How do I plan for such a project? What can I expect to find? How do I handle public relations? This paper presents a case study that evaluates and expands upon these issues based on facts, figures, and lessons learned from 1,000,000+ ft of smoke testing recently completed in Huntsville, Alabama. The results provide guidance for sewer managers and engineers to better understand what to expect during smoke testing and suggestions to better educate the public and other City departments.
- Water Environment Federation (WEF)
- BLOWING SMOKE Facts, Figures, and Other Useful Tips for ...
Case study - Shopping center avoids litigation by resolving sewer odor problems
Mazzei Injector Company, LLC is a recognized industry leader in gas to liquid mass transfer primarily from its proven 25 year experience with ozone applications. In addition, Mazzei has installed the same patented Venturi injector and mixing nozzle technology in many municipal and industrial wastewater systems in applications at lift stations, equalization tanks, aeration basins, activated sludge digesters and in-pipeline post-aeration discharge.New Problem/Opportunity: A new shopping center in Ventura, California,...
PeCOD Case Study – Industrial Waste Water
Clean Harbors is an industrial wastewater treatment facility in Guelph, Ontario. The facility utilizes highly refined, chemical precipitation processes, which remove heavy metals, suspended solids, and organics to generate safe effluent for discharge into municipal sewer systems. Wastewater is treated to meet municipal discharge requirements for biochemical oxygen demand (BOD5). Since BOD is a 5-day test, the results cannot be used to continuously monitor organic load. Chemical oxygen demand (COD) is used as a...
An approximate model on three-dimensional groundwater infiltration in sewer systems
Groundwater infiltration through cracked sewer pipes has caused significant economic losses. This paper presents a three-dimensional analytical expression for calculating the steady-state groundwater infiltration rate into sewer systems. As an extension of the previously developed two-dimensional model by the author, this new model can be used to simulate the infiltration through an orifice defect. The derived analytical expression has been validated with experimental results. The new model incorporates all the...
Experimental study of hydraulics and sediment capture efficiency in catchbasins
Catchbasins (also known as gully pot in the UK and Australia) are used to receive surface runoff and drain the stormwater into storm sewers. The recent interest in catchbasins is to improve their effectiveness in removing sediments in stormwater. An experimental study was conducted to examine the hydraulic features and sediment capture efficiency in catchbasins, with and without a bottom sump. A sump basin is found to increase the sediment capture efficiency significantly. The effect of inlet control devices,...
Valuing information for sewer replacement decisions
Decision-making for sewer asset management is partially based on intuition and often lacks explicit argumentation, hampering decision transparency and reproducibility. This is not to be preferred in light of public accountability and cost-effectiveness. It is unknown to what extent each decision criterion is appreciated by decision-makers. Further insight into this relative importance improves understanding of decision-making of sewer system managers. As such, a digital questionnaire (response ratio 43%), containin...