NITROGEN AND PHOSPHORUS REMOVAL PERFORMANCE OF AAO-BIOFILM PROCESS FOR ELECTROPLATING WASTEWATER TREATMENT

ZHUANG Guijia; LIU Lifan; HUANG Xiao; GAO Jingsi; ZHU Jia

doi:10.13205/j.hjgc.202212017

Volume 40 Issue 12

Nov. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(12): 128-133

ZHUANG Guijia, LIU Lifan, HUANG Xiao, GAO Jingsi, ZHU Jia. NITROGEN AND PHOSPHORUS REMOVAL PERFORMANCE OF AAO-BIOFILM PROCESS FOR ELECTROPLATING WASTEWATER TREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 128-133. doi: 10.13205/j.hjgc.202212017

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ZHUANG Guijia, LIU Lifan, HUANG Xiao, GAO Jingsi, ZHU Jia. NITROGEN AND PHOSPHORUS REMOVAL PERFORMANCE OF AAO-BIOFILM PROCESS FOR ELECTROPLATING WASTEWATER TREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(12): 128-133. doi: 10.13205/j.hjgc.202212017

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NITROGEN AND PHOSPHORUS REMOVAL PERFORMANCE OF AAO-BIOFILM PROCESS FOR ELECTROPLATING WASTEWATER TREATMENT

doi: 10.13205/j.hjgc.202212017

1. School of Civil and Traffic Engineering, Guangdong University of Technology, Guangzhou 510643, China;
2. School of Civil and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China;
3. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China

Received Date: 2022-03-02
Available Online: 2023-03-23

Abstract

Abstract

To improve the pollutant removal efficiency of electroplating wastewater, the removal efficiencies of organic matter, nitrogen and phosphorus by anaerobic anoxic aerobic (AAO)-biofilm coupling process were discussed. The experimental results showed that the AAO-biofilm process owned good operation performance for treating refractory organic matters in electroplating wastewater, and the COD removal rate was stable at about 89%. The majority of nitrogen was removed through nitrification in the aerobic tank and denitrification in the anoxic tank. The nitrogen removal rate of the system reached 70%~80% after 60 days operation. Refractory organics affected the removal efficiency of NH₄⁺-N and COD and made a time gap between them. The change of NH₄⁺-N lagged behind COD. The phosphorus removal performance of the AAO-biofilm process tended to be stable after 50 days operation, the effluent concentration was less than 1 mg/L, and the removal rate was more than 65%. Phosphorus was mainly removed through anaerobic release and aerobic absorption of the functional microorganisms.
- electroplating wastewater,
- AAO process,
- biofilm-coupled activated sludge,
- refractory organic matter,
- nitrogen removal,
- phosphorus removal

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References

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