Rice husk as carbon source and biofilm carrier for water denitrification

• Autorzy: Shao L , Xu Z X , Jin W , Yin H L
• Języki publikacji: EN

Abstrakty

EN

We investigated rice husk as the sole carbon source as well as biofilm carrier in the biological denitrification of wastewater in up-flow laboratory reactors. Fast startup of the reactor and high nitrate removal efficiency was observed. The highest denitrification rate (about 0.096kg/m³·d) was achieved when flow rate and nitrate concentration were 41.4L/d and 25.0mg/L, respectively. Flow rate and nitrate concentration of the influent were observed to have a significant effect on nitrate removal efficiency. The reactor had the ability to accommodate a wide range of pH (6.5-8.5) and DO (1.5-4mg/L). A time-dependent decrease in nitrate removal efficiency was observed after 72 days of operation. And the addition of new rice husk brought about a rapid increase of nitrate removal efficiency. Results showed that rice husks can be an economical and effective carbon source for the nitrate removal process.

Słowa kluczowe

EN

rice husk; rice hull zob.rice husk; carbon source; biofilm carrier; biological denitrification; water denitrification; waste water; nitrate removal process

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2009
• Tom: 18
• Numer: 4
• Opis fizyczny: p.693-699,fig.,ref.

Twórcy

autor

Shao L

• State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China

autor

Xu Z X

• State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China

autor

Jin W

• State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China

autor

Yin H L

• State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai-200092, P. R. China

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