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Mixotrophic denitrification of waste activated sludge fermentation liquid as an alternative carbon source for nitrogen removal: Reducing N2O emissions and costs.
Fang, Fang; Yang, Jie; Chen, Ling-Long; Xu, Run-Ze; Luo, Jing-Yang; Ni, Bing-Jie; Cao, Jia-Shun.
Afiliação
  • Fang F; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China. Electronic address: ffang65@hhu.edu.cn.
  • Yang J; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
  • Chen LL; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
  • Xu RZ; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China. Electronic address: runzexu@hhu.edu.cn.
  • Luo JY; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
  • Ni BJ; School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia.
  • Cao JS; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
J Environ Manage ; 362: 121348, 2024 Jun.
Article em En | MEDLINE | ID: mdl-38824891
ABSTRACT
Heterotrophic-sulfur autotrophic denitrification (HAD) has been proposed to be a prospective nitrogen removal process. In this work, the potential of fermentation liquid (FL) from waste-activated sludge (WAS) as the electron donor for denitrification in the HAD system was explored and compared with other conventional carbon sources. Results showed that when FL was used as a carbon source, over 99% of NO3--N was removed and its removal rate exceeded 14.00 mg N/g MLSS/h, which was significantly higher than that of methanol and propionic acid. The produced sulfate was below the limit value and the emission of N2O was low (1.38% of the NO3--N). Microbial community analysis showed that autotrophic denitrifiers were predominated in the HAD system, in which Thiobacillus (16.4%) was the dominant genus. The economic analysis showed the cost of the FL was 0.062 €/m3, which was 30% lower than that in the group dosed with methanol. Our results demonstrated the FL was a promising carbon source for the HAD system, which could reduce carbon emission and cost, and offer a creative approach for waste-activated sludge resource reuse.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Esgotos / Carbono / Fermentação / Desnitrificação / Nitrogênio Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Esgotos / Carbono / Fermentação / Desnitrificação / Nitrogênio Idioma: En Ano de publicação: 2024 Tipo de documento: Article