The performance of the adsorption (A)-CANON process treatment municipal wastewater
SHI Qin, CHANG Qing-long, XIE Hong-chao, ZHANG Ling-min, ZHAO Yu-hao, WANG Ya-yi
Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Adsorption (A)-CANON process was proposed to verify the feasibility of using this process to treat municipal wastewater from wastewater treatment plants. The adsorption unit was established for the carbon adsorption and recycling, then the low C/N wastewater (effluent of the A unit) entered the CANON unit for the autotrophic nitrogen removal. This process ran stably for 175 cycles and exhibited robust carbon and nitrogen removals. At HRT=20min and DO=2mg/L, the removal efficiency of COD in the A unit reached more than 60% with effluent C/N declining to about 1.5. In the CANON unit, the effluent COD, TN and NH4+-N were lower than 50mg/L, 15mg/L and 5mg/L, respectively, which basically have met the wastewater discharge standard for A standard, first class. The 16S rDNA high throughput sequencing showed that the dominant anammox bacteria was Candidatus_Jettenia and Candidatus_Brocadia. Candidatus_Jettenia can adaptable for the low ammonia and normal temperature environment better than Candidatus_Brocadia while using the A-CANON process, i.e. the abundance of Candidatus_Jettenia increased from 1.79% in the 85th cycle to 13.51% in the 175th cycle while that of Candidatus_Brocadia reduced by 1.4%. The results proved that the A-CANON process can treat municipal sewage effectively as well as recycle the carbon, which provides theoretical basis and technical support for its sustainable application on municipal wastewater treatment.
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SHI Qin, CHANG Qing-long, XIE Hong-chao, ZHANG Ling-min, ZHAO Yu-hao, WANG Ya-yi. The performance of the adsorption (A)-CANON process treatment municipal wastewater. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(2): 598-603.
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