Denitrification of Spent Regenerated Brine Using Molasses

Abstract

Abstract. Spent BRINE from the regeneration of exhausted resins has to be properly treated before its disposal. The heterotrophic denitrification of regenerated brine was studied in present work. Molasses which served as a carbon source has until now not been applied during brine denitrification. The nitrate and nitrite consumptions were observed according to different ratios between total organic carbon and nitrate (TOC / NO 3 ratios) and the influence of NaCl was studied during batch experiments. This work ascertained that molasses is a very good source of carbon, and no addition of other nutrients is necessary. The complete nitrate removal from regenerated brine could be achieved using molasses.

Effect of carbon source and nitrate concentration on denitrification of high-nitrate wastewater

“…The whole variety of substrates has been used in many studies mostly methanol [8,9], acetate [1,10], ethanol [11,12], and acetic acid [13,14]. Numerous different industrial waste products were tested, i.e., molasses [15,16], glycerol as a byproduct of biofuels production [17][18][19].…”