Your browser doesn't support javascript.
loading
One-stage anammox and thiocyanate-driven autotrophic denitrification for simultaneous removal of thiocyanate and nitrogen: Pathway and mechanism.
Chen, Xue; Duan, Fuang; Yu, Xi; Xie, Yuyang; Wang, Zhibin; El-Baz, Amro; Ni, Bing-Jie; Ni, Shou-Qing.
Afiliação
  • Chen X; School of Environmental Science and Engineering, Shandong University, Shandong 266237, China.
  • Duan F; School of Environmental Science and Engineering, Shandong University, Shandong 266237, China; The Fifth Prospecting Team of Shandong Coal Geology Bureau, Jinan, Shandong 250215, China.
  • Yu X; The Fifth Prospecting Team of Shandong Coal Geology Bureau, Jinan, Shandong 250215, China.
  • Xie Y; School of Environmental Science and Engineering, Shandong University, Shandong 266237, China.
  • Wang Z; School of Life Sciences, Shandong University, Qingdao, Shandong 266237, China.
  • El-Baz A; Environmental Engineering Department, Faculty of Engineering, Zagazig University, Zagazig 44519, Egypt.
  • Ni BJ; School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
  • Ni SQ; School of Environmental Science and Engineering, Shandong University, Shandong 266237, China. Electronic address: sqni@sdu.edu.cn.
Water Res ; 265: 122268, 2024 Nov 01.
Article em En | MEDLINE | ID: mdl-39173358
ABSTRACT
The coupled process of anammox and reduced-sulfur driven autotrophic denitrification can simultaneously remove nitrogen and sulfur from wastewater, while minimizing energy consumption and sludge production. However, the research on the coupled process for removing naturally toxic thiocyanate (SCN-) is limited. This work successfully established and operated a one-stage coupled system by co-cultivating mature anammox and SCN--driven autotrophic denitrification sludge in a single reactor. In this one-stage coupled system, the average total nitrogen removal efficiency was 89.68±3.33 %, surpassing that of solo anammox (81.80±2.10 %) and SCN--driven autotrophic denitrification (85.20±1.54 %). Moreover, the average removal efficiency of SCN- reached 99.50±3.64 %, exceeding that of solo SCN--driven autotrophic denitrification (98.80±0.65 %). The results of the 15N stable isotope tracer labeling experiment revealed the respective reaction rates of anammox and denitrification as 106.38±10.37 µmol/L/h and 69.07±8.07 µmol/L/h. By analyzing metagenomic sequencing data, Thiobacillus_denitrificans was identified as the primary contributor to SCN- degradation in this coupled system. Furthermore, based on the comprehensive analysis of nitrogen and sulfur metabolic pathways, as well as the genes associated with SCN- degradation, it can be inferred that the cyanate (CNO) pathway was responsible for SCN- degradation. This work provided a deeper insight into coupling anammox with SCN--driven autotrophic denitrification in a one-stage coupled system, thereby contributing to the development of an effective approach for wastewater treatment involving both SCN- and nitrogen.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Tiocianatos / Processos Autotróficos / Desnitrificação / Nitrogênio Idioma: En Revista: Water Res Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Tiocianatos / Processos Autotróficos / Desnitrificação / Nitrogênio Idioma: En Revista: Water Res Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Reino Unido