公开(公告)号：EP4450466A1

公开(公告)日：2024-10-23

申请号：EP24171008.6

申请日：2024-04-18

申请人： KNU-Industry Cooperation Foundation

发明人： OH, Sang Eun ,  KIM, Seung Gyu ,  ANUP, Gurung ,  KANG, Woo Chang

IPC分类号： C02F3/34 ,  C02F3/30

摘要： Provided is an electron donor cyclic sulfur denitrification agent including sulfur (S°) particles; any one iron sulfide particles or a mixture of two or more iron sulfide particles selected from a group of iron sulfide particles including Fe 2 S 3 particles, FeS particles, and FeS 2 particles; iron hydroxide (Fe(OH) 3 ) particles; sulfur oxidizing denitrifying bacteria; and sulfate reducing bacteria. In the electron donor cyclic sulfur denitrification agent of the present invention, since sulfur circulates through reactions in the forms of iron sulfide (an electron donor for denitrification) and iron hydroxide (adsorbent of H 2 S) by sulfur oxidizing denitrifying bacteria and sulfate reducing bacteria, it has an advantage of maintaining denitrification activity for a longer time by minimizing the replenishment of additional electron donors as compared with the denitrification reaction using sulfur (S 0 ) in the related art. In addition, with respect to the electron donor cyclic sulfur denitrification agent of the present invention, when the sulfate ion generated during the sulfate denitrification is converted to the hydrogen sulfide by the sulfate reducing bacteria (SRB), the iron hydroxide (Fe(OH) 3 ) chemically adsorbs and removes these substances, so that it has an advantage in that there is no odor caused by the hydrogen sulfide. In addition, the electron donor cyclic sulfur denitrification agent of the present invention reuses hydrogen ions generated during the S° denitrification reaction, minimizing the consumption of the alkalinity, so that it has an advantage of maintaining denitrification activity for a longer period of time than the denitrification reaction using only sulfur as a sole electron donor in the related art. Therefore, by using the electron donor cyclic sulfur denitrification agent of the present invention, it is expected that a stable denitrification reaction can be performed without generating odor and minimizing the supply of additional electron donors and the alkalinity.