The manhole odor eliminator is a carbon filter system designed to remove odors from sewer vents and other manholes. Each filter cartridge contains activated carbon filter media. This filter can remove large amounts of hydrogen sulfide and other odors from sewer manholes.

• Controls Odors
• Low Cost
• Easy Installation
• Contains activated carbon filter material
• Long Lasting
• Replaceable Filter Cartridge
• Low Maintenance
• Fits all size manholes

Contaminated air enters the filter through a hole in the bottom of the cartridge. Air is then dispersed trough activated carbon before exiting the filter.

The manhole odor eliminator is equipped with an air bladder. The bladder buffers the frequent fluctuations of sewer gas. The odor absorbent carbon only has to treat the peak flow rates.

The filter cartridge is supported in an adjustable stainless steel ring. During installation the ring is expanded to seal the manhole. A small gap between the ring and the filter allows any rainwater entering the manhole to bypass the filter media increasing the life span and effectiveness of the filter cartridge.

BASIC PROBLEM

Sewer gases escape from manhole covers and cause nuisance, health and safety problems. The ambient air flow into manholes and the sewer gases flow out of manholes is caused by a great many factors including sewer system design, operation, time, chemical and biological, environmental and many other conditions.

These conditions result in fluctuating pressure and flow of air and gasses through manhole covers. On extensive sewer lines with multiple manholes only some of the manholes may have severe odor problems.

COMMON SOLUTION - PRIOR ART

A pre-formed manhole insert is fitted under the grate and an odor absorbing cartridge of activated carbon type media treats sewer gases before exiting manhole cover.

This is considered an improvement in reducing odor complaints. The problem with this solution is short cartridge life and high cost of cartridge replacement and service. Workmen health and safety issues occur during each service along with disruption of traffic in service area.

Sealing lids and plugging pick holes in covers may help but may also shift odor problems elsewhere.

INTRODUCING THE MANHOLE ODOR ELIMINATOR

The Manhole Odor Eliminator is the latest patent pending treatment method. This invention is considered a substantial improvement over prior art.

This product includes many of the prior art items and features plus a variable volume device (bladder) that acts to accommodate the frequent fluctuations of pressure and flow that affects sewer gases and ambient air flow.

The expansion and contraction of air and gases from thermal temperature changes and plumbing use anywhere in the system can cause flow in or out of the manhole. The bladder captures a portion of this flow and only the flow exceeding the bladder capacity allows sewer gas to pass through the cartridge. This feature may substantially extend the life of the activated carbon many times.

Note: Inventor has several other bladder related patents and patents pending for solutions to other environment and equipment problems.

More information and an installation guide is available on the Download page.