Brown and Caldwell Home Page
Technical Papers RECENT PAPERS    ALL PAPERS

Brown and Caldwell engineers and scientists are technical and thought leaders in the environmental sector. Meet the people who have been advancing innovation for more than 70 years.
Author      Title/Abstract      


Improving Energy and Operational Efficiency in Odor Control Systems
Author: Steve Davidson, P.E.
Date: 4/912
Preprint, Odors and Air Pollutants 2012, Louisville, Kentucky, April 15-18, 2012

Wastewater treatment plant odor control systems utilize significant resources in terms of electrical energy, water use, and, in some cases, chemical consumption. Odorous air treatment creates a domino effect of energy use through complimentary HVAC systems and their associated fuel use for heating and cooling. Optimizing the design and control of odor systems can produce substantial reductions in energy use and demand from in-plant support systems. Odor control systems are designed to conform to a variety of goals and constraints including: • Prevent fugitive emissions from covered tanks and channels • Achieve effective air treatment to minimize off-site odors and the potential for complaints from neighbors • Maintain safe working conditions in buildings with odor exposure. • Complying with NFPA 820 requirements to maintain adequate ventilation and mitigate fire hazards. These requirements often lead to odor control systems that are very conservatively designed. While the systems may perform well, these designs are often very energy inefficient and result in considerably higher operating costs than is called for. Many systems have no means of system control to operate at less than full capacity. Chemical scrubbers present special problems since they require costly chemicals and chemical solution circulation for effective odorant absorption. Many scrubbers are routinely operated without a good understanding of the correlation between pH, ORP, chlorine concentration, and wasted chlorine residual lost through the scrubber blowdown.

This library contains published materials for which copyrights may be owned by entities other than Brown and Caldwell, but which are stored for limited uses by BC employees. Technical papers authored by BC employees generally may be printed and shared electronically with clients and prospective clients outside BC. Technical papers cannot be sold, and technical papers shared outside BC must have proper attribution of the original sponsoring organization or conference where the paper was presented. This attribution is embedded in each technical paper file when it is loaded into this library. Published articles from magazines or trade journals which are stored in this library are FOR INTERNAL USE ONLY and SHOULD NOT be distributed to clients or others outside BC, without express permission of the copyright owner. For questions regarding copyrights associated with any document in this library, or questions regarding copyrights in general, contact the Legal Department.