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Application of biofilters
Published in Joseph S. Devinny, Marc A. Deshusses, Todd S. Webster, Biofiltration for Air Pollution Control, 2017
Joseph S. Devinny, Marc A. Deshusses, Todd S. Webster
After startup, suboptimal removal performance, in particular for DMDS, was observed. Smoke tests revealed that significant short-circuiting occurred on the sides of the biofilter (Webster, 1998). Note that the above-ground biofilter did not include any structural work to hold the medium in place and that the sides have a 3:1 slope (Figure 9.7). To correct this problem, wood chips were added to the side of the biofilter, and additional soaker hoses were added to maintain them at the appropriate moisture level. Smoke testing revealed that this corrective measure was successful. As pollutant removal went up, odor complaints stopped.
Manholes, Laterals, and Ancillary Structures
Published in Justin Starr, Water and Wastewater Pipeline Assessment Technologies, 2021
Since laterals are simply smaller versions of sewer lines, many of the same condition assessment technologies can apply. Smoke testing is commonly used to evaluate the main line and associated laterals. In smoke testing, blowers are used to force smoke into an isolated section of the sewer line. This smoke will spread out through the system and escape through any cracks or defects and make its way to the surface. Smoke coming out of manholes and roof vents is a good sign – smoke emerging from sidewalks, front yards, and pavements indicates the probable location of a defect allowing smoke to escape and infiltration to enter during wet weather.
Wastewater Collection System
Published in Subhash Verma, Varinder S. Kanwar, Siby John, Environmental Engineering, 2022
Subhash Verma, Varinder S. Kanwar, Siby John
Smoke testing is done to determine the following: Illegal connections.The source of surface flow.To confirm a building is connected to the sewer system.To locate broken manholes and lost sewers.
Building performance and end-user interaction in passive solar and low energy housing developments in Scotland
Published in Architectural Science Review, 2018
Tim Sharpe, Gráinne McGill, Rosalie Menon, Paul Farren
In contrast, the airtightness of the tested house at CS-C was 11.3 m3/h/m2 @50 Pa, equivalent to 14.38 ach. This was well above the accepted threshold of 3–5 ach for MVHR systems. Smoke testing identified numerous air leakage paths, the most significant being under the kitchen units and washing machine, around the MVHR unit, around the bath panel and at the open pipe chase at the side of the toilet.