植物作为反硝化碳源

研究得到一种新型的筛选反硝化碳源的方法:可以通过比较材料浸出液的C/N值,筛选出有效的反硝化碳源;对芦苇秸秆、梧桐黄叶、梧桐绿叶、橘树叶、玉米秸秆和玉米芯6种材料浸出液的C/N值进行了研究,其中当以叶片作为反硝化固相碳源时,应该选取新鲜叶片作为研究对象。橘树叶和玉米芯均属于良好的反硝化碳源。以驯化后的河泥作为反硝化污泥,可以利用橘树叶或者玉米芯作为反硝化固相碳源,进行持续脱氮除磷反应,其中橘树叶脱氮效果强于玉米芯,而玉米芯除磷能力强于橘树叶。扫描电镜实验表明,橘树叶和玉米芯均适合作为生物膜载体。

Plants as carbon sources for denitrification

A new method of screening of denitrifying carbon source was acquired from this research. Effective denitrifying carbon sources could be selected by the comparison of C/N values of the material leaching liquor. In this paper, six materials' C/N values were studied in detail, including reed straws, yellow and green leaves of Chinese parasol, orange leaves, corn straws and corn cobs. The results showed that fresh leaves should be chosen as the research object, and orange leaves and corn cobs were favorable denitrifying carbon sources. Taking sludge as denitrifying mud, orange leaves or corn cobs could be regarded as denitrifying solid carbon sources to carry out nitrogen and phosphorus continually. It showed that denitrifying effect of orange leaves was better than corn cobs', but phosphorus removal ability of corn cobs was stronger than that of orange leaves. The results of scanning electron microscopy (SEM) experiments showed that both orange leaves and corn cobs were suitable as biofilm carriers.