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Research Abstracts Online
January 2008 - March 2009

University of Minnesota Twin Cities
College of Food, Agricultural, and Natural Resource Sciences
Southern Research and Outreach Center

PI: Jun Zhu

A Field-surface Aeration System to Control Odor From Open Liquid Manure Storage Facilities

The overall objective of this proposal is to develop and evaluate a novel, cost-effective surface aeration system using venturi air injectors. The significance of research can be summarized in the following aspects: 1) it will advance the knowledge and understanding of the reaction kinetics and nutrients transport in the aerated surface layer in a swine manure storage; 2) it will enhance the engineering practice in aeration system design by providing key information with which the efficiency and effectiveness of the treatment can be greatly improved and/or optimized; 3) it will provide applicable knowledge to swine producers in selecting surface aeration equipment that meets their respective odor control needs; and 4) it will pave the way for all animal producers (not just swine) who use liquid manure storages to adopt advanced aeration technologies for controlling manure odors. Specific objectives of this research are to 1) conduct experiments to collect data in an aerated storage at lab and field scales to evaluate the odor reduction potential of the experimented surface aeration system; 2) gain a better understanding of some important factors (such as aeration depth, total solids (TS) content, and temperature) that may impact the effectiveness of the surface aeration method; 3) present particular information on the design and evaluation of two aerator modules composed of venture air injectors in terms of oxygen transfer efficiency, in which one, two, and three venturi air injectors were connected in two different configurations, either in series or in parallel, to determine the best aeration efficiency and oxygenation capacity; 4) conduct experiments to evaluate the relationship between two odor generation indicators: biochemical oxygen demand and volatile fatty acids.

Group Members

Chunying Dong, Graduate Student
Curtis Miller, Staff
Liang Wang, Graduate Student
Xiao Wu, Graduate Student