Laboratory of Environmental Technology, INET Tsinghua University, Beijing 100084, P.R. China.
Environ Technol. 2012 Oct-Nov;33(19-21):2369-74. doi: 10.1080/09593330.2012.669411.
Biological nitrate removal using wheat straw and polylactic acid (PLA) as both carbon source and biofilm support was investigated. The results showed that biofilm could develop on the surface of wheat straw within 15 d, the denitrification rate was 0.067 mg-N/(g-wheat straw x h) and nitrate removal efficiency was about 100%. For PLA, the time required for biofilm development was 40 d, the denitrification rate was 0.0026 mg-N/(g-PLA x h) and nitrate removal efficiency could also reach 100%. Temperature had a substantial influence on the denitrification performance of both wheat straw and PLA. The FTIR analysis and SEM observation confirmed that wheat straw and PLA were used for denitrification, and explained some reasons for the differences between the two substrates. The wheat straw was superior to PLA when used as carbon source for nitrate removal, in terms of the denitrification rate.
利用小麦秸秆和聚乳酸（PLA）作为碳源和生物膜载体去除生物硝酸盐。结果表明，生物膜可以在小麦秸秆表面形成，15 天后反硝化速率为 0.067mg-N/（g-小麦秸秆xh），硝酸盐去除率约为 100%。对于 PLA，生物膜形成需要 40 天，反硝化速率为 0.0026mg-N/（g-PLAxh），硝酸盐去除率也可达到 100%。温度对小麦秸秆和 PLA 的反硝化性能有显著影响。FTIR 分析和 SEM 观察证实了小麦秸秆和 PLA 都可用于反硝化，同时解释了两种基质之间差异的一些原因。就反硝化速率而言，小麦秸秆作为硝酸盐去除的碳源优于 PLA。
