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Using AWM for Evaluating Existing Structures

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008292.(doi:10.13031/2013.29605)
Authors:   Harbans Lal
Keywords:   Animal Waste Management, Waste Storage Structures, Anaerobic Lagoons, Design and Evaluation

AWM (Animal Waste Management) is a software design tool. It has been traditionally used for designing animal waste storage and treatment facilities. It estimates waste production of liquids and solids from animal feeding operations based upon the type and size of animal herd, site-specific weather information, and user-specified withdrawal months or storage period. The USDA/NRCS field staff and Technical Service Providers (TSPs) also feed the AWM waste generated numbers into the Manure Management Planner (MMP) for developing Comprehensive Nutrient Management Plans (CNMPs). Recently the AWM was upgraded to incorporate the capability for evaluating existing waste storage structures for their adequacy in storing the waste during the critical period. The upgraded AWM also helps in designing the new facility for the Total waste or for the Additional waste where AWM accounts for the capacity of the existing facility in the design process. This paper describes these capabilities with examples. It also demonstrates how to evaluate different options for a situation where the capacity of an existing facility becomes inadequate to store the waste due to addition of new animals to the operation.

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