Your browser doesn't support javascript.
loading
Nitrogen removal of anaerobically digested swine wastewater by pilot-scale tidal flow constructed wetland based on in-situ biological regeneration of zeolite.
Han, Zhenfeng; Dong, Jing; Shen, Zhiqiang; Mou, Rui; Zhou, Yuexi; Chen, Xuemin; Fu, Xiaoyong; Yang, Chunping.
Afiliação
  • Han Z; College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy
  • Dong J; Beijing Municipal Research Institute of Environmental Protection, Beijing, 100037, China.
  • Shen Z; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China; Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China. Electronic address: s
  • Mou R; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China; Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China; Institute of Environm
  • Zhou Y; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China; Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China. Electronic address: z
  • Chen X; Institute of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
  • Fu X; Institute of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
  • Yang C; College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
Chemosphere ; 217: 364-373, 2019 Feb.
Article em En | MEDLINE | ID: mdl-30419390
Dispersed swine wastewater has increasingly aggravated water pollution in China. Anaerobically digested dispersed swine wastewater was targeted and treated by a pilot-scale zoning tidal flow constructed wetland (TFCW) with a bottom wastewater saturation layer. The long-term application of in-situ biological regeneration of biozeolite, nitrogen removal performance, nitrogen removal pathways and microbial community of TFCW were investigated. Results showed that with the surface loads of 0.079, 0.022 and 0.024 kg/(m2·d), TFCW could decrease COD, NH4N and TN by 84.75%, 74.13% and 67.13% respectively. Influent COD, NH4N, TN and nitrates/nitrites produced by bioregeneration of NH4N were mostly removed in zeolite layer and the remaining nitrates/nitrites could be further denitrified in bottom saturation layer. Theory of dynamic process of rapid-adsorption and bioregeneration for NH4N removal was proposed. When this process reached dynamic equilibrium, the mass of adsorbed NH4N onto zeolites remained relatively stable. When ambient temperature decreased to 16 °C, TFCW could still remove COD, NH4N and TN by 73.79%, 72.99% and 70.71% with the surface loads of 0.103, 0.056 and 0.054 kg/(m2·d) respectively. Nitrification-denitrification which accounted for 80.32% of TN removal was the main nitrogen removal pathway. Dominant nitrifiers (Nitrosospira and Rhizomicrobium) and denitrifiers (Ottowia, Thauera and Rhodanobacteria) in biozeolite layer verified the existence of simultaneous nitrification and denitrification.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Zeolitas / Áreas Alagadas / Águas Residuárias / Nitrogênio Limite: Animals País/Região como assunto: Asia Idioma: En Revista: Chemosphere Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Zeolitas / Áreas Alagadas / Águas Residuárias / Nitrogênio Limite: Animals País/Região como assunto: Asia Idioma: En Revista: Chemosphere Ano de publicação: 2019 Tipo de documento: Article