ZHANGXiao-ling,HUYi-song,JIAOCheng-fan,et al.Effect of Biogas Circulating Mode on Wastewater Treatment Performance of Anaerobic Dynamic Membrane Bioreactor[J].China Water & Wastewater,2023,39(3):25-31.
Effect of Biogas Circulating Mode on Wastewater Treatment Performance of Anaerobic Dynamic Membrane Bioreactor
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第3期
Page:
25-31
Column:
Date of publication:
2023-02-01
- Keywords:
- anaerobic dynamic membrane bioreactor; biogas circulation; membrane aperture; domestic wastewater
- Abstract:
- The effects of nylon mesh size (200 meshes and 500 meshes) and biogas circulating mode (continuous sparging, no sparging and intermittent sparging) on the wastewater treatment performance of a lab-scale AnDMBR were investigated. The operating cycle of AnDMBR was extended when the membrane supporting material aperture was 200 meshes. The optimal biogas circulating mode was sparged every 2 hours for 1 min. Under this operating mode, the gaseous methane production was higher, and the dissolved methane production and the membrane fouling rate were the lowest. The removal rate of COD by AnDMBR was more than 80%, and that of turbidity was approximately 90%. SEM-EDX analysis showed that the biogas sparging intensity affected the density and thickness of the cake layer. The continuous biogas circulation led to the breakage of sludge particles, the stripping of sludge cake layer and the decrease in the average particle size of sludge. The bacterial phyla in the bioreactor mainly included Proteobacteria, Chloroflexi, Firmicutes and Bacteroidetes, while the archaea genera mainly consisted of Methanoregula, Methanothrix and Methanobacterium.
Last Update:
2023-02-01