Biological Denitrification Using Slow-Release Carbon Source Composite Materials as Solid Carbon Source and Biofilm Carrier

He Ming Wang; Fan Yang

doi:10.4028/www.scientific.net/AMR.702.218

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 702Biological Denitrification Using Slow-Release...

Biological Denitrification Using Slow-Release Carbon Source Composite Materials as Solid Carbon Source and Biofilm Carrier

Abstract:

As lack of organic carbon source is a key problem for biological denitrification, hemp fiber, PBS, PLA and PE were selected as raw materials, then four kinds of slow-release carbon source composite materials were prepared by 35A-double-screw extruder and used for biological denitrification. Their performan- ces were detected through static and continuous experiments. The results showed that in the static experiments, release carbon abilities of HB20 and HB40 were both not good, their COD_Mn were 5.42 and 12.83mg/L respectively; In the continuous experiments, NO₃-N removal rate of HLE decreased from 57.9% to 13.1% within 30 days. HBE could cause a continuous release of dissolved organic compound. In the operation of 66 days, above 96.0% NO₃-N was removed and NO₂-N level was below 0.02mg/L when influent NO₃-N =30.0mg/L and HRT=24h. HBE was the most suitable carbon source carrier material for biological denitrification.

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Periodical:

Advanced Materials Research (Volume 702)

Pages:

218-223

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.702.218

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Online since:

May 2013

Authors:

He Ming Wang, Fan Yang

Keywords:

Biofilm Carrier, Biological Denitrification, Slow-Release Carbon Source Composite Materials, Solid Carbon Source

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