In this study. the denitrification of nitrate-contaminated groundwater by the heterotrophic denitrification (HD) method was studied to produce drinking water. Preliminary tests were carried out in a denitrification reactor. consisting of an opaque PVC column filled with a plastic packing. https://www.bekindtopets.com/super-save-Vetscan-Flex-4-Rapid-Test-25-ct-super-buy/