WANGWan-jin,ZHANGLi-shan,ZHONGShan,et al.Micro-electrolysis Coupled with Constructed Wetland for Removal of Sulfamethazine from Livestock Wastewater[J].China Water & Wastewater,2024,40(21):109-115.
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Micro-electrolysis Coupled with Constructed Wetland for Removal of Sulfamethazine from Livestock Wastewater

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第21期 Page: 109-115 Column: Date of publication: 2024-11-01
Author(s):
WANG　Wan-jin1; 2;  ZHANG　Li-shan2; 3;  ZHONG　Shan2; 3;  ZHU　Jia-yan1; 2;  ZHANG　Mei?fang1; 2;  CHEN　Yun-mei1; 2;  XIAO　Gui-fang1; 2
（1. College of Environment and Resources， Guangxi Normal University， Guilin 541006， China； 2. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection ， Guilin 541006， China； 3. School of Life and Environmental Sciences， Guilin University of Electronic Technology， Guilin 541004， China）
Keywords:
micro-electrolysis;  constructed wetland;  sulfamethazine;  enzyme activities
Abstract:
The purification efficacy of micro-electrolysis coupled with upflow vertical flow constructed wetland system (A) was compared with that of an ordinary upflow vertical flow constructed wetland system (B) for the treatment of sulfamethazine (SM2) present in livestock wastewater. Additionally, the impact of SM2 on substrate enzyme activities and microbial communities within both constructed wetland systems was analyzed. The introduction of SM2 into the wastewater had a negligible impact on system A’s removal efficiency for conventional pollutants, which remained consistently high and stable. In contrast, system B experienced significant adverse effects from SM2, resulting in an average decrease of approximately 15% in the removal efficiency of conventional pollutants, accompanied by considerable fluctuations. The influence of SM2 on the activities of urease, alkaline phosphatase, and dehydrogenase in system A was relatively minor, suggesting that system A exhibited greater resilience to the effects of SM2 while its microbial community continued to uphold a robust functional state. The iron-carbon micro-electrolysis effectively mitigated the stress impact of SM2 on the microbial community within system A. The abundance of functional bacterial genera linked to the removal of conventional pollutants exhibited minor changes, though these were not statistically significant. The predominant strains influencing antibiotic degradation included Cloacibacterium, Lysobacter, Acinetobacter, and Brevundimonas, and their abundances exhibited a marked increase during the operation after the introduction of SM2. The system’s adaptive adjustments ensured sustained operational stability and removal efficiency. The activities of urease, alkaline phosphatase, and dehydrogenase, along with the overall microbial abundance in system B, exhibited significant reductions. This indicated that system B was unable to effectively mitigate the impact of SM2, resulting in a notable inhibition of its microecology by SM2 and consequently diminishing the pollutants removal efficiency.
Last Update: 2024-11-01