Performance of autotrophic nitrogen removal from digested piggery wastewater
Performance of autotrophic nitrogen removal from digested piggery wastewater
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养猪消化废水自养脱氮性能
DOI：
10.1016/j.biortech.2017.05.153
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发表时间：
2017
影响因子：
11.4
通讯作者：
Lei Yunhui
中科院分区：
文献类型：
--
作者：
Wang Shuang;Wang Lan;Deng Liangwei;Zheng Dan;Zhang Yunhong;Jiang Yiqi;Yang Hongnan;Lei Yunhui
在390 d的运行中，通过逐步缩短水力停留时间（HRT）和提高猪场消化废水（DPW）浓度，研究了自养脱氮工艺处理DPW的性能。结果表明，总氮去除率和总氮去除效率分别达到3.9 kg-N m-3day-1和73%，均显著高于此前报道的水平。高相对丰度的亚硝化单胞菌（4.2%）和功能菌（12.15%）导致高的好氧氨氧化活性（1.25 ± 0.1 g-N g VSS−1d−1），良好的沉降能力（SVI，78.42 mL g− 1 SS）导致高的污泥浓度（VSS，11.01 g L−1），这为优异的性能奠定了坚实的基础。高通量焦磷酸测序结果表明，与人工模拟废水相比，DPW降低了脱氮微生物各功能群的相对丰度，增加了厌氧菌（15.7%）、硫氧化菌（9.4%）和产甲烷菌（40.8%）的相对丰度。
The performance of an autotrophic nitrogen removal process to treat digested piggery wastewater (DPW) was investigated by gradually shortening the HRT and enhancing the DPW concentration during 390 days of operation. The results showed that the total nitrogen removal rate and efficiency reached 3.9 kg-N m−3day−1and 73%, which were significantly higher than the levels reported previously. A high relative abundance ofNitrosomonas(4.2%) and functional microbes (12.15%) resulted in a high aerobic ammonium oxidizing activity (1.25 ± 0.1 g-N g VSS−1d−1), and a good settling ability (SVI, 78.42 mL g−1SS) resulted in a high sludge concentration (VSS, 11.01 g L−1), which laid a solid foundation for the excellent performance. High-throughput pyrosequencing indicated that, compared with synthetic wastewater, the DPW decreased the relative abundances of every functional group of nitrogen removal microbes, and increased relative abundances of anaerobes (15.7%), sulfur-oxidizing bacteria (9.4%) and methanogens (40.8%).