Sewer Manhole Odor Control
Street-level odor complaints are often caused by septic gravity sewer lines that vent H2S and odorous air through gaps and pick-holes in their sewer manhole covers.
Especially in residential neighborhoods and commercial areas around shops and restaurants these manholes can lead to odor complaints. A quick and inexpensive solution to these complaints are our custom-designed Bioteg Manhole Biofilter Inserts.
Pump Station / Lift Station Odor Control
Pump and Lift Stations are frequently cause for odor complaints as sewage accumulates in their wetwells. Turbulence caused by pumping activity or high velocity inflow into the wetwell will strip out any generated sulfide as H2S, which can escape through doors, hatches, manholes or vent pipes.
Depending on the size and layout of each pump station, Bioteg offers several easy solutions for your pump station / lift station odor problems:
Odors building up in wetwells and escaping through hatches, manholes or vent pipes can be captured and treated by our:
Many customers have taken control of their wetwell odor (and FOG) issues by adding a wetwell mixer or aerator and then scrubbing the additional H2S off-gas with a Bioteg passive Manhole or Vent Pipe Biofilter.
Larger pump stations with wetwell/drywell configurations often need to be vented for safe worker’s access. For odor control we typically recommend an air exchange rate of 6 air changes per hour (ACPH) to create a slight negative pressure sufficient to treat odors.
However, a space that is accessed by workers requires a ventilation at 12 ACPH per OSHA.
Force Main Air Release Valves
Force Mains are a common cause for H2S generation due to the long time the sewage spends in the pipe without reaeration. Often H2S builds up at high spots in the line and is released through air release valves (ARV) in high volumes and at fairly high pressure. Bioteg designed its Force Main Biofilter as a passive biofilter with a larger body of filter material to efficiently treat these high air volumes.
Wastewater Treatment Plant – Headworks
Influent sewage to a wastewater treatment facility is often loaded with dissolved sulfides, that will readily strip out as H2S at a plant’s headworks. To improve working conditions for operators and to protect headworks equipment and electronics from corrosion, it is advisable to treat the air from a headworks building in a biofilter. Bioteg provides modular container biofilters for larger airstreams that are required to sufficiently ventilate a headworks building.
Wastewater Treatment Plant – Biosolids
Nuisance odors are a common concern at treatment plants’ biosolids handling areas. Depending on the type of solids processed and the method of processing, odors are caused by organic and inorganic forms of sulfur, mercaptans, ammonia, amines, and organic fatty acids, all of which are degradable in a Bioteg Biofilter.
Wherever septage is accepted, upstream of the plant, at the headworks, at the sludge handling train, or at its own dedicated septic receiving station, septic odors are typically part of the picture. Enclosing the area and pulling the odorous air through a Bioteg Biofilter (SRBF or MCBF) can alleviate these odor nuisances.
While composting is an aerobic biological process, anaerobic odors can originate from the incoming feedstock or bulking agents that have been stored without aeration before transport to the composting site. As long as odors can be captured from the composting process, they can be directed to a Bioteg Modular Container Biofilter (MCBF) for treatment.
Bioteg Biofilters can be used on any biologically biodegradable air pollutants in a variety of industries, such as:
- Food & Beverage
- Pulp & Paper