In order to ascertain the effects of different carbon sources (methanol, glucose, starch and NaHCO(3)) on denitrification in BESs, the experiment was conducted in a constant current, 3.5 of chemical oxygen demand to nitrate ratio in a greenhouse. Among the four carbon sources investigated in BESs, NaHCO(3) showed the highest nitrite accumulation and the ratio of soluble microbial products to soluble chemical oxygen demand (SMP/SCOD) with a value of 3.68 ± 0.68 mg/L and 94%, respectively. And the addition of organic substrates could reduce SMP production and enhance the denitrification process. In the constant voltage experiment, it was observed that the organics could be used by microbes to generate electrons at the anode. And a maximal current value of 11.0 mA in the BESs fed with starch indicated that the complex carbon source was easier to be used by microorganisms to generate electricity than the simple carbon source.

译文

:为了确定不同碳源(甲醇,葡萄糖,淀粉和NaHCO(3))对BES中反硝化的影响,该实验在恒定电流下进行,该温室中化学需氧量与硝酸盐的比率为3.5。在BES中研究的四种碳源中,NaHCO(3)表现出最高的亚硝酸盐积累和可溶性微生物产物与可溶性化学需氧量(SMP / SCOD)的比率,分别为3.68±0.68 mg / L和94% 。并且添加有机底物可以减少SMP的产生并增强反硝化过程。在恒压实验中,观察到微生物可以将有机物用于在阳极产生电子。淀粉喂养的BES中的最大电流值为11.0 mA,这表明与简单碳源相比,微生物更容易使用复杂的碳源发电。

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