Abstract:The combination pilot process of multi-stage fluidized bed-biological aerated filter was used to treat high-strength ammonia-nitrogen industrial wastewater. The start-up method of this pilot system and pollutants removal efficiency during its stable operation stage were studied, and its superiority over traditional activated sludge processes were also determined. The results showed that the start-up of this pilot system could be accomplished within about 50 d through controlling the flow rate and gradually elevating the inflow load. At the start-up stage, the removal efficiencies of COD and NH4+-N were 68.74% and 97.92%, respectively. The COD and NH4+-N concentrations in effluent were 176.35 mg·L-1 and 13.52 mg·L-1, respectively. At the stable stage with the flow rate of 2.0 m3·d-1, the average removal efficiencies of COD and NH4+-N were 92.66% and 99.32%, respectively, and the average COD and NH4+-N concentrations in effluent were 152.24 mg·L-1 and 1.32 mg·L-1, respectively. Of which the NH4+-N concentration in effluent could meet the requirement of class Ⅳ water standard for surface water. Compared with the traditional activated sludge process, the pilot system of multi-stage fluidized bed-biological aerated filter could improve the COD and NH4+-N removal efficiencies from 85.37% to 92.66% and from 72.53% to 99.32%, respectively. Key words:high-strength ammonia-nitrogen wastewater/ industrial wastewater/ biological fluidized bed/ biological aerated filter.
图1实验工艺流程图及装置 Figure1.Process flow diagram of test and picture of equipments
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1.Shenzhen Shentou Environment Technology Co. Ltd., Shenzhen 518049, China 2.Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China Received Date: 2018-09-29 Accepted Date: 2019-03-04 Available Online: 2019-09-30 Keywords:high-strength ammonia-nitrogen wastewater/ industrial wastewater/ biological fluidized bed/ biological aerated filter Abstract:The combination pilot process of multi-stage fluidized bed-biological aerated filter was used to treat high-strength ammonia-nitrogen industrial wastewater. The start-up method of this pilot system and pollutants removal efficiency during its stable operation stage were studied, and its superiority over traditional activated sludge processes were also determined. The results showed that the start-up of this pilot system could be accomplished within about 50 d through controlling the flow rate and gradually elevating the inflow load. At the start-up stage, the removal efficiencies of COD and NH4+-N were 68.74% and 97.92%, respectively. The COD and NH4+-N concentrations in effluent were 176.35 mg·L-1 and 13.52 mg·L-1, respectively. At the stable stage with the flow rate of 2.0 m3·d-1, the average removal efficiencies of COD and NH4+-N were 92.66% and 99.32%, respectively, and the average COD and NH4+-N concentrations in effluent were 152.24 mg·L-1 and 1.32 mg·L-1, respectively. Of which the NH4+-N concentration in effluent could meet the requirement of class Ⅳ water standard for surface water. Compared with the traditional activated sludge process, the pilot system of multi-stage fluidized bed-biological aerated filter could improve the COD and NH4+-N removal efficiencies from 85.37% to 92.66% and from 72.53% to 99.32%, respectively.