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Carbon Reduction and Pollutant Abatement by a Bio-Ecological Combined Process for Rural Sewage.
Jin, Qiu; Chen, Liangang; Yang, Shengyun; Zhu, Chaochao; Li, Jingang; Chen, Jing; Li, Wei; Peng, Xinxin.
Afiliação
  • Jin Q; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China.
  • Chen L; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China.
  • Yang S; School of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China.
  • Zhu C; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China.
  • Li J; School of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China.
  • Chen J; School of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China.
  • Li W; School of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China.
  • Peng X; Department of Ecological Sciences and Engineering, College of Environment and Ecology, Chongqing University, Chongqing 400030, China.
Article em En | MEDLINE | ID: mdl-36674396
In order to explore the treatment effect of a bio-ecological combined process on pollution reduction and carbon abatement of rural domestic wastewater under seasonal changes, the rural area of Lingui District, Guilin City, Guangxi Province, China was selected to construct a combined process of regulating a pond, biological filter, subsurface flow constructed wetland, and ecological purification pond. The influent water, effluent water, and the characteristics of pollutant treatment in each unit were investigated. The results showed that the average removal rates of COD, TN, and NH3-N in summer were 87.57, 72.18, and 80.98%, respectively, while they were 77.46, 57.52, and 64.48% in winter. There were significant seasonal differences in wastewater treatment results in Guilin. Meanwhile, in view of the low carbon:nitrogen ratio in the influent and the poor decontamination effect, the method of adding additional carbon sources such as sludge fermentation and rice straw is proposed to strengthen resource utilization and achieve carbon reduction and emission reduction. The treatment effect of ecological units, especially constructed wetland units, had a high contribution rate of TN treatment, but it was greatly impacted by seasons. The analysis of the relative abundance of the microbial community at the phylum level in constructed wetlands revealed that Proteobacteria, Acidobacteria, Chloroflexi, Firmicutes, Bacteroidetes, Planctomycetota, and Actinobacteria were the dominant phyla. The relative abundance of microbial communities of Proteobacteria, Chloroflexi, and Acidobacteria decreased to a large extent from summer to winter, while Firmicutes, Bacteroidetes, and Planctomycetota increased to varying degrees. These dominant bacteria played an important role in the degradation of pollutants such as COD, NH3-N, and TN in wetland systems.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Esgotos / Poluentes Ambientais Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Esgotos / Poluentes Ambientais Idioma: En Ano de publicação: 2023 Tipo de documento: Article