Evaluation of a Tomato Waste Biofilter for the Retention of Gaseous Losses from Pig Slurry Hygienization by pH Modification

The use of pig slurry as organic fertilizer in intensive horticulture could be possible after hygienization to avoid contamination products. This research aimed evaluate a mixture tomato waste and rice husk biofilter media reduce NH3, N2O, CO2, CH4 losses from simple low-cost solution for by pH modification. experiment was made system laboratory scale biofilters connected jars filled with raw control three treatment methods: acidified slurry, alkalinized neutralized slurry. gas concentrations were measured 35 days, the composition slurries determined. results this study showed that biofiltering media, composed husk, has potential retain NH3 greenhouse gases (GHG) Compared biofilter, subjected combined alkalinization/neutralization, retained 19% 4% 83% had no impact on N2O global warming potential. Thus, during alkalinization did not increase loss reduced GHG compared avoiding subsequent neutralization environmental reasons, used an horticulture. However, using alkalinization/neutralization will improve value adjusting 9.5 7.5.