ABSTRACT
This chapter presents an approach to hydraulic analysis of manifold systems typically used in composting practice. Most composting processes use manifold systems to evenly distribute the supplied air and/or evenly collect the process gas. Design of such systems involves numerous tradeoffs between competing engineering variables. Distribution is improved by using a higher headloss across the individual orifices within the manifold; however, higher headloss increases power consumption. Manifold systems for composting applications were classified by Kuchenrither into temporary, semipermanent, and permanent types and by Higgins into stationary and movable types. Increasing the size of the manifold will reduce headloss along the manifold length so that each port will experience essentially the same DELTAP. Proper manifold design is an important aspect of compost system design. The function of a manifold is to provide uniform flow distribution at reasonable cost, without excessive headloss or high power consumption.
