New Learnings on Composting Technological Deployment
Historically, one of the major impediments to successful biosolids composting facilities has been the lack of understanding and properly designing and operating facilities to prevent offsite odor problems. This one issue has resulted in the closure of dozens of composting facilities that were otherwise successful. In the past decade, great strides have been made in the design of compost systems that can successfully contain and treat composting odors such that offsite odor problems are eliminated and facilities can be good neighbors.
Two popular composting technologies, the membrane covered aerated static pile process and the conventional aerated static pile process with biofiltration continue to be developed, each with a good measure of odor control. Both technologies provide superior odor control when compared to conventional windrow operations. These two technologies were evaluated in a composting facility study to determine how the odor control performance comparedfor a 42,000 ton per year capacity composting operation. Compost process emissions concentrations and flows from the proposed facilities were used to determine overall emissions estimates and to perform odor dispersion models. Graphic representation of the odor control performance of theseoperations could then be compared.
This presentation will summarize the comparison of the two technical approaches in terms of overall process flow,emissions assumptions and resultant odor emissions produced. Emissions information for windrow processing will also be presented as a comparison.This information will be useful for planners, administrators, engineers and operators who are considering the development of composting operations.