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Waste-water Odor Control

This project was performed by RES (Remediation Equipment & Services) with Ozone Solutions equipment.

Project Description

Provide Ozone System for Fugitive Odor Control at Wastewater Treatment Facility.

Client

Little Washington Wastewater Company, a Division of Aqua Pennsylvania, Inc.

Baseline Odor Study at Site

In the summer of 2011, RES was approached by Little Washington Wastewater Company (LWWC), the wholly owned wastewater utility subsidiary of AQUA Pennsylvania, about performing a fugitive odor emissions study as part of an ongoing project to satisfy nearby resident concerns regarding periodic odor complaints from a small wastewater treatment facility. RES determined a course of action which included a two week period of nuisance emissions monitoring at three locations within the site. After the initial two week data gathering period, RES, for an additional two week period, encapsulated the suspected source areas of odor emissions. Monitoring these points as well as a point downwind began in order to identify local concentrations of odor causing gasses. The result of this month-long study led
to the recommendation for the utilization of gaseous ozone as an odor controlling agent to mitigate, if not eliminate the nuisance emissions.

Ozone Equipment Installation

The ozone system design included the following hardware: a small air compressor with a drier unit, an oxygen concentrator, a 40 gram per hour Ozone Solutions, Inc. ozone generator and the necessary tubing, fittings, check valves and dispersion equipment. The ozone system as it was designed was installed in early 2012. Based on the design, after ozone is generated by the Ozone Solutions, Inc. generator, it is distributed and injected into three points at the headworks of the facility; the equalization tank (EQT) via existing aeration system piping, both the influent grit screening chamber and the influent flow meter pit have ozone injected through the use of perforated Teflon tubing above the water level where oxidation of gasses occurs. The influent pits, previously exposed to the atmosphere were then covered to provide additional containment of any malodors or stray gas. The installation was successful and completed at a relatively low capital cost and with a minimal impact to LWWC's ongoing operating costs.

Results

As of the writing of this case study, LWWC has not received any odor complaints related to the operations of the treatment facility.

Results1 Results2

Last Updated: October 4, 2012

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