Changes of microbial community structure during the initial stage of biological clogging in horizontal subsurface flow constructed wetlands
| Autor: | Xu Dong, Chen Disong, Ze Hu, Wei Liu, Zhenbin Wu, Dongru Qiu, Taotao Cao, Guoliang Bai, Mingzhen Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Environmental Engineering Nitrogen Bioengineering Wetland 010501 environmental sciences Waste Disposal Fluid 01 natural sciences law.invention Clogging law 010608 biotechnology parasitic diseases Organic matter Subsurface flow Waste Management and Disposal Filtration 0105 earth and related environmental sciences Biological Oxygen Demand Analysis chemistry.chemical_classification geography geography.geographical_feature_category Renewable Energy Sustainability and the Environment Microbiota Chemical oxygen demand Environmental engineering food and beverages General Medicine Substrate (marine biology) Microbial population biology chemistry Wetlands Environmental science |
| Zdroj: | Bioresource Technology. 337:125405 |
| ISSN: | 0960-8524 |
| Popis: | The clogging is a universal problem in constructed wetlands, where microorganisms play an essential role. However, the implication of micro-organism variation due to the clogging is not clear. Four horizontal subsurface flow constructed wetlands (HFCWs) were designed and operated to simulate the process of clogging. The wetland treatment performance and microbial community variation were investigated by regularly monitoring. Results showed the substrate filtration rate and the total phosphorous (TP) removal efficiency consistently decreased and the chemical oxygen demand (COD) and total nitrogen (TN) removal efficiency were at the range of 50%-85% and 10–20%, respectively. The sequencing results indicated that the clogging could affect the richness of bacterial community. The bacterial variation could be attributed to the dissolved oxygen decreasing and organic matter accumulation in the initial clogging period. These findings are expected to provide some theoretical reference for developing the biological methods to indicate the initial clogging in constructed wetlands. |
| Databáze: | OpenAIRE |
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