Effect of different extra carbon sources on nitrogen loss control and the change of bacterial populations in sewage sludge composting
Effect of different extra carbon sources on nitrogen loss control and the change of bacterial populations in sewage sludge composting
复制标题
不同额外碳源对污泥堆肥氮素损失控制及细菌种群变化的影响
DOI：
10.1016/j.ecoleng.2016.05.013
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发表时间：
2016-09-01
影响因子：
3.8
通讯作者：
Sha, Changqing
中科院分区：
文献类型：
--
作者：
Meng, Liqiang;Li, Weiguang;Sha, Changqing
研究了不同外加碳源对污泥堆肥过程中氮素损失的控制效果及堆肥过程中细菌数量的变化。采用葡萄糖、蔗糖、淀粉和纤维素四种添加剂，在实验室规模的堆肥反应器中进行堆肥试验。研究了堆肥过程中温度、pH、氮素含量和与氮素转化相关的细菌数量的变化。葡萄糖、蔗糖和淀粉的添加减少了氮素损失和硝化细菌的数量，增加了氨化细菌、氨同化细菌和硝化细菌的数量。葡萄糖、蔗糖和淀粉处理的氮损失分别减少了24.7%、46.3%和26.5%。氨化细菌、氨同化细菌和硝化细菌的数量分别增加了6.8- 22.7%、2.1- 19.4%和3.3- 16.0%。蔗糖的氮损失最低（15.87%），氨同化菌数最高（7.0 log 10 cfu/g），硝化菌数最高（5.6 log 10 cfu/g），是最佳的添加剂。结果表明，在污泥堆肥过程中添加碳源可以通过提高氨化细菌、氨同化细菌、硝化细菌的数量，减少硝化细菌的数量，从而减少氮素的损失。(C)2016由Elsevier B. V.出版
The aim of this study was to evaluate the effect of different extra carbon sources on nitrogen loss control and the change of bacterial populations in sewage sludge composting. Four amendments, glucose, sucrose, starch and cellulose, were applied into the composting experiments conducted in the lab-scale reactor. The variation in temperature, pH, nitrogen content and bacterial population related to nitrogen transformation were detected during the 33 days composting. The addition of glucose, sucrose and starch reduced nitrogen loss and denitrifying bacteria population while increased the population of ammonifying, ammonia assimilating and nitrifying bacteria. Nitrogen loss was reduced by 24.7%, 46.3% and 26.5% in glucose, sucrose and starch treatments, respectively. The population of ammonifying, ammonia assimilating and nitrifying bacteria increased by 6.8-22.7%, 2.1-19.4%, 3.3-16.0%, respectively. Sucrose was the optimal amendment due to the lowest nitrogen loss (15.87%), the highest population of ammonia assimilating (7.0 logio cfu/g) and nitrifying bacteria (5.6 logio cfu/g). The results suggested that adding carbon sources in sludge composting could reduce nitrogen loss through improving the population of ammonifying, ammonia assimilating, nitrifying bacteria and reducing the population of denitrifying bacteria. (C) 2016 Published by Elsevier B.V.