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Waste Management (PigBal)
PigBal 4 is a model for estimating waste outputs for the evaluation and design of piggery management systems and sustainable reuse areas. It can also be used to estimate volatile solids production for the purpose of estimating Greenhouse gas emissions (GHG) and is used to determine baseline calculations in the Carbon Farming Initiatives methodology “Destruction of methane generated from manure in piggeries”
PigBal was recently validated and revised in 2013 to improve the accuracy of manure and GHG predictions. The revised model includes among many things a revised diet list, corrected mass balance, deep litter option, feed intake estimates for grower herd based on live weight, Feed entered daily or annually, model of feed wastage, anaerobic pond activity ratios, output summary sheet including graphs, CFI calculation sheet and a new user manual.
It is anticipated that the upgraded version of PigBal will be adopted nationally as the standard tool for providing realistic estimates of solids and major nutrients in piggery waste streams.