曝气和生物炭对用于处理猪废水的人工湿地微宇宙中植物和微生物群落及代谢物生理特性的影响。
Impacts of aeration and biochar on physiological characteristics of plants and microbial communities and metabolites in constructed wetland microcosms for treating swine wastewater.
机构信息
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao, 266237, PR China; State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
出版信息
Environ Res. 2021 Sep;200:111415. doi: 10.1016/j.envres.2021.111415. Epub 2021 Jun 1.
Constructed wetlands (CWs) by modifying operation strategies or substrates have grown in popularity in recent years for improving the treatment capacity. However, few studies focused on the responses of wetland vegetation and associated microorganisms in CWs for treating high-strength wastewaters. This study evaluated the long-term responses of plants and microbes in CWs with biochar and intermittent aeration for treating real swine wastewater. The results showed that intermittent aeration or combined with biochar could decrease the stress response of wetland plants against the swine wastewater. Biochar addition promoted the production of extracellular polymeric substances (EPS, total 516.27 mg L) mainly including protein-like, humic-like and tryptophan-like components. However, intermittent aeration resulted in the EPS reduction (99.24 mg L). As for microbial communities, biochar addition supported rich and diverse microbial communities (652 OTUs), while the combination with biochar and aeration could not improve diversity of microbes (597 OTUs). Additionally, the combination altered the microbial community structures and changed microbial composition correlated with environmental factors.
近年来，通过改变操作策略或基质来构建人工湿地（CWs）已越来越受到人们的欢迎，以提高处理能力。然而，很少有研究关注湿地植被和相关微生物在 CWs 中处理高强度废水的响应。本研究评估了生物炭和间歇曝气在 CWs 中处理实际猪废水中对植物和微生物的长期响应。结果表明，间歇曝气或与生物炭联合使用可以降低湿地植物对猪废水的应激反应。生物炭的添加促进了胞外聚合物（EPS，总量为 516.27mg/L）的产生，主要包括蛋白类、腐殖酸类和色氨酸类成分。然而，间歇曝气导致 EPS 减少（99.24mg/L）。对于微生物群落，生物炭的添加支持丰富多样的微生物群落（652 个 OTUs），而与生物炭和曝气的结合并不能提高微生物的多样性（597 个 OTUs）。此外，组合改变了微生物群落结构，并改变了与环境因素相关的微生物组成。
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