SUN Yu-ming,HU Jin-ling,JIANG Xue-song,et al.Degradation of Acid Red 73 Wastewater by Microbial Electrolysis Combined Process[J].China Water & Wastewater,2021,37(17 17):86-93.
Degradation of Acid Red 73 Wastewater by Microbial Electrolysis Combined Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
17 17
Page:
86-93
Column:
Date of publication:
2021-09-01
- Keywords:
- microbial electrolysis; aerobic biochemical treatment; Fenton oxidation; acid red 73; aniline
- Abstract:
- The microbial electrolysis combined process composed of microbial electrolysis, aerobic biochemical treatment and Fenton oxidation, was employed to treat the acid red 73 (AR73) wastewater. The removal efficiencies of AR73, COD and chromaticity and denitrification performance in each treatment unit were investigated. The performance of the MEC/O process was compared with that of the traditional A/O process, and the variations in concentrations of NO2--N and NO3--N and the removal efficiency of aniline in the aerobic stage were mainly investigated. The results showed that the removal efficiencies of AR73, COD, aniline and chromaticity were 98.97%, 86.5%, 99% and 90%, respectively. When the concentration of AR73 in the influent was low, the generation rate of AR73 in the MEC/O process was between 3% and 5% of AR73 concentration of influent, indicating that it had a lower recoupling. The ratio of NO2--N/NO3--N was between 151.1% and 380.97% in the A/O process, and that was between 0 and 84.24% in the MEC/O process. Compared with A/O process, MEC/O process had a smaller inhibitory effect on nitrifying bacteria. When the concentration of aniline was greater than 24 mg/L, the ammonia nitrogen oxidation rate was the lowest. After the introduction of Fenton oxidation process, the chromaticity was greatly reduced while the trace aniline was removed, and the dosage of the activated carbon was reduced in the subsequent process.
Last Update:
2021-09-01