TY - JOUR
T1 - Enhanced Simultaneous Nitrogen and Phosphorus Removal Performance by Anammox-HAP Symbiotic Granules in the Attached Film Expanded Bed Reactor
AU - Zhang, Yanlong
AU - Ma, Haiyuan
AU - Lin, Lan
AU - Cao, Wenzhi
AU - Ouyang, Tong
AU - Li, Yu You
N1 - Funding Information:
We gratefully acknowledge the funding for this study from the National Key R&D Program of China (Grant 2016YFC0502901), the National Natural Science Foundation of China (Grant 41771500), and the China Postdoctoral Science Foundation (Grant 2017M610397).
PY - 2018/8/6
Y1 - 2018/8/6
N2 - Dissolved nitrogen and phosphorus compounds are responsible for eutrophication and usually are treated by separate processes in wastewater treatment plants. In this study, the simultaneous, long-term, stable removal of phosphorus and nitrogen was achieved in a high-loading anammox attached film expanded bed (AAFEB) reactor. As an energy-saving and high-efficiency biological process, the anammox reaction performed stable and high nitrogen removal. In addition, the chemical environment and hydrodynamic conditions of the AAFEB system, as well as the microenvironment of the anammox granules, induced the crystallization of hydroxyapatite (HAP). As an inorganic carrier of anammox biofilms, HAP enhanced the settling velocity and shear strength of the anammox granules and thus promoted the operational stability of the AAFEB reactor. In the coupled anammox-HAP system, the nitrogen removal rate reached 44.8 g fo N/(L/day), with a stable phosphorus removal rate of 71.61 ± 6.82%. The results indicated that the coupled anammox-HAP system enhanced the nitrogen removal performance and provided a possible phosphorus recovery pathway through biomineralization processes.
AB - Dissolved nitrogen and phosphorus compounds are responsible for eutrophication and usually are treated by separate processes in wastewater treatment plants. In this study, the simultaneous, long-term, stable removal of phosphorus and nitrogen was achieved in a high-loading anammox attached film expanded bed (AAFEB) reactor. As an energy-saving and high-efficiency biological process, the anammox reaction performed stable and high nitrogen removal. In addition, the chemical environment and hydrodynamic conditions of the AAFEB system, as well as the microenvironment of the anammox granules, induced the crystallization of hydroxyapatite (HAP). As an inorganic carrier of anammox biofilms, HAP enhanced the settling velocity and shear strength of the anammox granules and thus promoted the operational stability of the AAFEB reactor. In the coupled anammox-HAP system, the nitrogen removal rate reached 44.8 g fo N/(L/day), with a stable phosphorus removal rate of 71.61 ± 6.82%. The results indicated that the coupled anammox-HAP system enhanced the nitrogen removal performance and provided a possible phosphorus recovery pathway through biomineralization processes.
KW - Anammox-HAP symbiotic granules
KW - Biomineralization
KW - Granule properties
KW - Phosphorus removal
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U2 - 10.1021/acssuschemeng.8b02414
DO - 10.1021/acssuschemeng.8b02414
M3 - Article
AN - SCOPUS:85049971282
VL - 6
SP - 10989
EP - 10998
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
SN - 2168-0485
IS - 8
ER -
