Emission Data

Indiana Swine Finishing (IN3B) Dataset

The IN3B data were collected at a deep-pit swine finishing farm in Indiana. This site had two bans, each consisted of four 1,000-head, 61 m x 12 m rooms (Lim et al., 2010). The monitoring period covered five growth cycles (GCs) from July 14, 2007 to July 24, 2009, including three complete growth cycles (8/28/07-2/25/08, 2/26/08-8/25/08, 8/26/08-2/23/09), and two half cycles (7/14/07-8/27/07, 2/24/09-7/24/09).

Although the data set was comprehensive, each GC had different numbers of observations and had 13% to 85% completeness depending on the pollutant (Table 1). GC 1 and GC 5 were partial, and GC 2 and GC 4 had low data completeness, GC 3 was the most complete cycle with average data completeness values of 75, 68, and 53% for NH3, H2S, and PM10, respectively.

Table 1. Measured emission and data completeness of the dataset.

Based on the characteristics of animal growth and room occupancy, the IN3B emission model for each pollutant consisted of a submodel each for the occupied-barn and empty-barn scenarios. The rooms were empty from 3.9% to 17.4% of the time (Table 2). Rooms 7 and 8 had more empty-room days because the nursery pigs were kept in rooms 5 and 6 for about a month before 50% of the pigs were moved. The finishing rooms were occupied (at least partially) for 82.6% to 96.1% of the time.

Table 2. Occupancy and vacancy of each room.

Growth Curve

Growth curve is developed based on the IN3B data, using for simplified model-based emission calculation. The growth curve for density is the product of weight and inventory (animal number). The weight curve and inventory (animal number) curve are observed data from IN3B.

© 2011 Agricultural Systems Management