Automatic Pit Evacuator

The APE is the most inexpensive way to attack H₂S odor and corrosion problems at the source - in wet wells (lift stations) and at the force mains, where large concentration of H₂S is typically present.  It has been shown in testing at the University of Florida and other working installations, to increase Dissolved Oxygen (DO) levels from as low as .02 (unit turned off) to 5.7 with peaks up to 6.2 during each pump cycle. DO levels attained from this device are significantly higher than other, more expensive treatment alternatives, including Bioxide Oxygen Injection and Magnesium Hydroxide as well as air treatment alternatives including Bio-filters and Bio-scrubbers.

When the pump runs a portion of the water sent through the discharge pipe is diverted to the Automatic Pit Evacuator. The "Venturi" effect sucks floating sludge and solids down to the floor of the pit and mixes it with the sand and other solids on the pit floor. This effect causes everything in the pit to be thoroughly mixed. The pump can then send the pit contents (liquids and solids) to the treatment plant.

If not satisfied with the performance of the APE after a thirty-day trail period, we will remove it at our cost and there would be no charges to you.

A gas detectable in very low concentrations and notable for both its toxicity and its ability to corrode various materials used in sewer and treatment plant construction is a major source of odor in wastewater treatment systems.

Sulfur Compounds Causing Odor and Corrosion: Odor-producing substances found in domestic wastewater and sludge. Most of these substances result from anaerobic decomposition of organic matter containing sulfur and nitrogen. Inorganic gases produced from domestic wastewater decomposition commonly include hydrogen sulfide, ammonia, carbon dioxide, and methane.

Of these gases, only hydrogen sulfide and ammonia are malodorous. Hydrogen sulfide is the most commonly known and prevalent odorous gas associated with domestic wastewater collection and treatment systems. It has a characteristic rotten egg odor, is extremely toxic, and is corrosive to metals such as iron, zinc, copper, lead and cadmium. Hydrogen sulfide is also a precursor to sulfuric acid formation, which corrodes lead-based paint, concrete, metals and other materials.

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