title: Removal of nitrogen from secondary effluent of a petrochemical industrial park by a hybrid biofilm-carrier reactor with one-stage ANAMMOX.
abstract: A laboratory study was undertaken to explore the capability of one-stage ANAMMOX in a hybrid biofilm-carrier reactor (HBCR) fed with petrochemical wastewater. Under favorable operating conditions in continuous-flow operations (at the dissolved oxygen level of 0.5-1.0 mg L(-1)), the average total nitrogen (TN) removal efficiency reached 62-67% and approximately 90% of TN can be removed by ANAMMOX. In batch operations of the hybrid biofilm-carrier reactor (without adding carbon substrate), the specific TN removal rate of the reactor in which both Kaldnes and nonwoven carriers were kept was two-fold higher than that of the reactor in which only nonwoven carriers were kept. This indicated that the microbial activity of thinner biofilms (Kaldnes carriers) was remarkably higher than that of thicker biofilms (nonwoven carriers). Finally, based on the 16S rRNA clone library, a cluster of ANAMMOX Candidatus Kuenenia stuttgartiensis was identified.
authors: Department of Environmental Engineering, National Cheng Kung University, No. 1, University Rd, Tainan 70101, Taiwan E-mail: sscheng@mail.ncku.edu.tw.
authors: Han-Lin
authors: HL
authors: Lin
authors: Department of Environmental Engineering, National Cheng Kung University, No. 1, University Rd, Tainan 70101, Taiwan E-mail: sscheng@mail.ncku.edu.tw.
authors: Hsiang-Wei
authors: HW
authors: Tsao
authors: Department of Environmental Engineering, National Cheng Kung University, No. 1, University Rd, Tainan 70101, Taiwan E-mail: sscheng@mail.ncku.edu.tw.
authors: Yu-Wen
authors: YW
authors: Huang
authors: Department of Environmental Engineering, Kun Shan University, No. 949, Dawan Rd, Tainan 71003, Taiwan.
authors: Yi-Chuan
authors: YC
authors: Wang
authors: Department of Environmental Engineering, National Cheng Kung University, No. 1, University Rd, Tainan 70101, Taiwan E-mail: sscheng@mail.ncku.edu.tw.
authors: Keng-Hao
authors: KH
authors: Yang
authors: Department of Environmental Engineering, National Cheng Kung University, No. 1, University Rd, Tainan 70101, Taiwan E-mail: sscheng@mail.ncku.edu.tw.
authors: Ya-Fei
authors: YF
authors: Yang
authors: San Ying Enterprises Co., Ltd, No. 51, Sec. 2, Chongqing S. Rd, Taipei 10075, Taiwan.
authors: Wei-Chiang
authors: WC
authors: Wang
authors: San Ying Enterprises Co., Ltd, No. 51, Sec. 2, Chongqing S. Rd, Taipei 10075, Taiwan.
authors: Chun-Kuei
authors: CK
authors: Wen
authors: Department of Environmental Engineering, Kun Shan University, No. 949, Dawan Rd, Tainan 71003, Taiwan.
authors: Sheng-Kun
authors: SK
authors: Chen
authors: Department of Environmental Engineering, National Cheng Kung University, No. 1, University Rd, Tainan 70101, Taiwan E-mail: sscheng@mail.ncku.edu.tw.
authors: Sheng-Shung
authors: SS
authors: Cheng
mesh_terms: D001421:Bacteria, Anaerobic / Q000145:classification / Q000235:genetics; D018441:Biofilms; D019149:Bioreactors; D007220:Industrial Waste / Q000032:analysis*; D009584:Nitrogen / Q000737:chemistry*; D010084:Oxidation-Reduction; D010578:Petroleum; D010802:Phylogeny; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D007220:Industrial Waste; D010578:Petroleum; D009584:Nitrogen