WANG Shuo,LIU Yun-si,LI Pan.Effect of Micro-nano Bubble Aeration on Aerobic Microbial Community in Small Water Body[J].China Water & Wastewater,2020,36(15 15):29-34.
Effect of Micro-nano Bubble Aeration on Aerobic Microbial Community in Small Water Body
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
15 15
Page:
29-34
Column:
Date of publication:
2020-08-01
- Abstract:
- The micro-nano bubble (MNB) aeration has been increasingly used in ecological restoration of small water body, and it has achieved good results. Under the same dissolved oxygen (DO) concentration condition, differences of microbial community in water and sediment aerated by micro-nano bubble aeration system and traditional macro-bubble aeration system were investigated. DO maintaining period of MNB aeration system was longer than that of macro-bubble aeration system. The slow release velocity and high transfer efficiency of MNB could keep DO concentration in the water at a high level for a long time. Meanwhile, pollutants degradation in MNB aeration system was better than that in macro-bubble aeration system at the same DO concentration. Analysis of microorganisms at genus level indicated that almost all microorganisms in MNB treated water were aerobic microbes and the top 18 genera accounted for 67.90% of the microbial community. However, no significant differences between the percentage of aerobic and anaerobic microorganisms in traditional macro-bubble aeration system, and the top 18 genera accounted for 41.36% of the microbial community. Aerobic microorganisms predominated in MNB aeration system, and it significantly improved the biodegradability of the water, thereby accelerating the degradation of pollutants. Without direct impact on the sediment, the impact scope of MNB was mainly in water body, and it had no remarkable effect on microbial community in the sediment in the short term.
Last Update:
2020-08-01