TY - JOUR ID - 10.1016/j.jes.2021.06.002 TI - Hybrid zeolite-based ion-exchange and sulfur oxidizing denitrification for advanced slaughterhouse wastewater treatment AU - Shuang Tong AU - Shaoxiang Zhang AU - Yan Zhao AU - Chuanping Feng AU - Weiwu Hu AU - Nan Chen VL - 34 IS - 3 PB - SP - 219 EP - 230 PY - JF - Journal of Environmental Sciences JA - J. Environ. Sci. UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=S100107422100231X&flag=1 KW - Corresponding author.;Sulfur oxidizing denitrification (SOD);Ion-exchange;Advanced slaughterhouse wastewater (SWW) treatment;Combined bio-activity carriers;Denitrifying bacteria AB - The discharge of slaughterhouse wastewater (SWW) is increasing and its wastewater has to be treated thoroughly to avoid the eutrophication. The hybrid zeolite-based ion-exchange and sulfur autotrophic denitrification (IX-AD) process was developed to advanced treat SWW after traditional secondary biological process. Compared with traditional sulfur oxidizing denitrification (SOD), this study found that IX-AD column showed: (1) stronger ability to resist NO3 pollution load, (2) lower SO42− productivity, and (3) higher microbial diversity and richness. Liaoning zeolites addition guaranteed not only the standard discharge of NH4+-N, but also the denitrification performance and effluent TN. Especially, when the ahead secondary biological treatment process run at the ultra-high load, NO3-N removal efficiency for IX-AD column was still ~100%, whereas only 64.2% for control SOD column. The corresponding average effluent TN concentrations for IX-AD and SOD columns were 5.89 and 65.55 mg/L, respectively. Therefore, IX-AD is a promising technology for advanced SWW treatment and should be widely researched and popularized. ER -