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[Denitrification using polylactic acid as solid carbon source].

Zhen-xing Fan1, Jian-long Wang

  • 1Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China. dr.fanzx@gmail.com

Huan Jing Ke Xue= Huanjing Kexue
|October 6, 2009
PubMed
Summary
This summary is machine-generated.

Polylactic acid (PLA) effectively supports biofilm for denitrification, removing nitrate completely within 13 hours at 30°C. This study confirms PLA

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Area of Science:

  • Environmental Science
  • Microbiology
  • Materials Science

Background:

  • Denitrification is crucial for removing nitrate from wastewater.
  • Developing efficient and sustainable carbon sources for denitrification is essential.
  • Polylactic acid (PLA) offers potential as a biodegradable material for environmental applications.

Purpose of the Study:

  • To evaluate the efficacy of polylactic acid (PLA) as a simultaneous solid carbon source and biofilm support in denitrification.
  • To investigate the impact of temperature on the denitrification performance using PLA.

Main Methods:

  • Utilized polylactic acid (PLA) as a solid carbon source and biofilm carrier.
  • Conducted denitrification experiments under controlled conditions.
  • Employed Infrared (IR) analysis to study PLA surface structure.
  • Used Scanning Electron Microscopy (SEM) to observe biofilm morphology.

Main Results:

  • PLA demonstrated feasibility as a solid carbon source for denitrification.
  • Complete nitrate removal (initial concentration 50 mg/L) was achieved within 13 hours at 30°C.
  • The average denitrification rate was 2.6 x 10(-1) mg/(g x h).
  • Temperature significantly influenced the denitrification rate.

Conclusions:

  • Polylactic acid (PLA) is a viable material for supporting denitrification biofilms.
  • Optimized temperature conditions enhance denitrification efficiency.
  • PLA's surface structure supports biofilm formation, primarily composed of cocci.