Degradation of Nitrogen, Phosphorus, and Organic Matter in Urban River Sediments by Adding Microorganisms
| Autor: | Wang Fan, Qianyu Zhao, Qiuheng Zhu, Bai Yangwei, Xiaojiao Zhang, Wei Yimei, Fang Yang, Haiqing Liao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Pollution
Environmental remediation Microorganism media_common.quotation_subject microbiological remediation Geography Planning and Development TJ807-830 Bacillus 010501 environmental sciences Management Monitoring Policy and Law TD194-195 01 natural sciences Renewable energy sources 03 medical and health sciences endogenous treatment GE1-350 Organic matter 030304 developmental biology 0105 earth and related environmental sciences media_common degradation chemistry.chemical_classification Pollutant 0303 health sciences Environmental effects of industries and plants biology Renewable Energy Sustainability and the Environment Sediment high-throughput sequencing biology.organism_classification Environmental sciences chemistry Microbial population biology Nitrifying bacteria Environmental chemistry |
| Zdroj: | Sustainability Volume 13 Issue 5 Sustainability, Vol 13, Iss 2580, p 2580 (2021) |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su13052580 |
| Popis: | Reducing and remediating endogenous sediment pollution in urban rivers using appropriate microbiological remediation technology is regarded as a safe, effective, and environmentally sustainable mechanism. In this study, the pollutant removal efficiency of three microorganism types at different dosages was studied in the laboratory. To optimize the microbial restoration scheme, a comprehensive analysis of their effectiveness in removing total nitrogen (TN), total phosphorus (TP), total organic matter (OM), and polycyclic aromatic hydrocarbons (PAHs) was conducted, and associated structural changes in the sediment bacteria were analyzed. The results showed that using nitrifying bacteria and Bacillus as microbial agents resulted in superior removal efficiencies of TN and TP in sediments, whereas yeast was not as effective. The removal rates of TN reached 27.65% and 20.88% when 5 mg nitrifying bacteria and 10 mg Bacillus respectively, were used. A comparative analysis showed that nitrifying bacteria exhibited a better TN removal effect however, Bacillus exhibited a better TP removal effect. The results of high-throughput sequencing revealed no significant changes to the microbial community structures when optimal microorganisms or beneficial microorganisms that thrive using OM as a source of C and energy were added. This study provides insights into the processes and mechanisms involved in the microorganism degradation of black and odorous sediment, and the results can be used as a basis for developing endogenous pollution control policies and methods for urban rivers. |
| Databáze: | OpenAIRE |
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