I Need a Nuisance Odor Prevention Plan – Should I Be Afraid? by Mark. A. Perkins, P.E.

Since 1990, 30 TAC§309, Subchapter B has governed siting of wastewater treatment facilities. Rule §309.13(e)(2) makes development of a nuisance odor prevention request an option for owners who, for various reasons, cannot achieve buffer zone criteria detailed earlier in the chapter.

This paper discusses nuisance odor prevention requests prepared for plant facilities ranging from very small packaged plants to larger municipal facilities. The essential elements of a nuisance odor prevention request (plan) will be addressed. What basic components are required, what does the TCEQ staff considerer when reviewing and approving the requests, and what circumstances may trigger the need for a more robust plan.

The TCEQ has recently required certain permittees to prepare odor prevention plans for facilities as a condition of enforcement action, and has requested such plans for off-site biosolids stockpile and disposal locations. These plans can be more complex and difficult to develop, as the level of scrutiny is increased considerably. Additional considerations for these plans will be discussed, as will options that should be considered when these needs arise.

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Prioritize Odor Control Alternatives with Dispersion Modeling by Charlotte G. Smith, P.E.

A primary goal of odor control master planning is to identify cost effective methods to reduce offsite odor impacts from wastewater conveyance and treatment facilities. Selecting which odor abatement technology or combination of technologies to implement from the myriad of alternatives can be arduous. The various conveyance and treatment systems prone to odorous emissions can handled by numerous odor control technologies with different capacities and configurations…Read the full paper here.

 

 

High Speed Turbo Blowers for Wastewater Treatment Aeration, by James McMillen, PE

In the past year there has been increased interest in using high-speed turbo blowers for wastewater aeration. New manufacturers have appeared on the market, and many manufacturers of multistage centrifugal blowers have developed and begun marketing high-speed turbo (HST) blowers. These blowers potentially have significant advantages over traditional blowers, including higher efficiencies, a wider operating range, lower operating noise, and highly integrated instrumentation and controls.

HST blowers also present significant challenges and unknowns. The technology is new to the United States, and although there are numerous installations there is little long term operating information and little information in the wastewater community on design, installation, operation, and maintenance. Retrofitting HST blowers into an existing facility can also present challenges, particularly when the high speed blowers are integrated into a system with multistage centrifugal (MSC) blowers.

This paper presents a case study of the City of Garland, Texas Rowlett Creek Wastewater Treatment Plant. In 2009 the City began designing an upgrade to the aeration system at the plant. During design, high-speed turbo blowers were investigated and specified as the preferred technology for the plant. These blowers were integrated with four existing multistage centrifugal blowers. Blowers were installed and started in 2011.

Read the full white paper which includes discussions on technology, specifications, controls, instrumentation, startup and operational experiences.