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 ...
Vacuum sewerage systems – a solution for fast growing cities in developing countries?
Developed more than a century ago, the potential of vacuum sewerage systems remains underexploited. At the same time, the rapid urbanization in Asia brings about major challenges for municipal utilities. In this context, the GIZ (Deutsche Gesellschaft fuer Internationale Zusammenarbeit) project ‘Integrated Resource Management in Asian Cities: the Urban Nexus’ gives technical advice to stakeholders in the partner cities. Fraunhofer IGB, having operated a vacuum sewer system for more than ten years in the context...
Release of hydrogen sulfide under intermittent flow conditions – the potential of simulation models
For engineering purposes it is especially useful to be able to predict and control sewer corrosion rates and odor impacts as well as to design effective measures aiming to reduce effects related to hydrogen sulfide formation and release. Doing so, it is important to use modeling tools that are capable of assessing variations of dissolved oxygen, dissolved sulfide and hydrogen sulfide gas concentrations for a wide range of environmental scenarios. Two such models were assessed: AEROSEPT, an empirical formulation,...
Effect of Doppler flow meter position on discharge measurement in surcharged manholes
Determining the proper installation location of flow meters is important for accurate measurement of discharge in sewer systems. In this study, flow field and flow regimes in two types of manholes under surcharged flow were investigated using a commercial computational fluid dynamics (CFD) code. The error in measuring the flow discharge using a Doppler flow meter (based on the velocity in a Doppler beam) was then estimated. The values of the corrective coefficient were obtained for the Doppler flow meter at...
Picking the right Sewer Camera
Sewer camera models are pretty straightforward, in most cases. But, there are many options if you want a sewer camera or commonly called snake camera. This type comes many varieties: Pipe Inspection camera with viewing capabilities only, sewer camera with locator, rigid sewer camera, intrinsically safe camera, VIS 350 camera, Wohler VIS 350 camera with detachable heads, push camera with 6mm diameter camera, drain camera, quality sewer camera, cheap sewer camera, color sewer camera, plumbing inspection camera,...
Identification of potential sewer mining locations: a Monte-Carlo based approach
Rapid urbanization affecting demand patterns, coupled with potential water shortages due to supply side impacts of climatic changes, has led to the emergence of new technologies for water and wastewater reuse. Sewer mining (SM) is a novel decentralized option that could potentially provide non-potable water for urban uses, including for example the irrigation of urban green spaces, providing a mid-scale solution to effective wastewater reuse. SM is based on extracting wastewater from local sewers and treatment at...