How much manure does one pig generate on a daily basis? Are there any research papers to support the data.
Thank you in advance.
@ Gail, it depends, but in general 1.2-1.3 gallons of manure per pig per day including the wash water used on the site.
Bodyweight and its related feed intake are also major factors in this respect.
This was only a little above the ASABE manure production standard rate which suggests about 1.2 gallons per pig per day, so it seems reasonable. However, they saw lots of variation between barns, though they average 1.3 gallons per pig per day, the standard deviation was 0.4 gallons per pig per day.
You’d think there would be lots of data floating around about how manure production changes with pig size, but it turns out that’s not typically how we collect the data. It’s normally collected as amount of manure produced over a finishing cycle. The first was looking back at some old manure production standards used to provide an estimate of manure production per 1,000 pounds of animal mass. Using this information we can estimate the manure production rate for lots of different pig sizes.
The amount of feces a pig produces per day in confinement ranges from 8 to 9% of its body weight, with a water content varying from 62 to 79% (Brooks and Carpenter, 1993). Water loss through the gut will vary with the nature of the diet. In general, the greater the proportion of undigested material, the greater the water loss (Maynard et al., 1979). Water loss in creases with increased fiber intake (Cooper and Tyler, 1959) and with intake of feeds that have laxative properties (Sohn et al., 1992; Darroch et al., 2008). Source: NRC, 2012
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