Start-up of halophilic nitrogen removal via nitrite from hypersaline wastewater by estuarine sediments in sequencing batch reactor
Start-up of halophilic nitrogen removal via nitrite from hypersaline wastewater by estuarine sediments in sequencing batch reactor
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DOI：
10.1007/s13762-013-0190-7
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发表时间：
2014-03
影响因子：
3.1
通讯作者：
Y. Cui;J. Ding;S. Ji;Y. Peng
中科院分区：
文献类型：
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作者：
Y. Cui;J. Ding;S. Ji;Y. Peng
利用河口沉积物对高含盐废水进行了140天的脱氮试验。在序批式反应器中，在0.016-0.139 kg N/[kg VSS day]的特定氨负荷下，维持有效的氨和总氮去除。在硝化过程中，亚硝酸盐稳定积累。比耗氨速率高于淡水活性污泥和盐驯化的淡水活性污泥。以甲醇为碳源时，嗜盐微生物的亚硝酸盐还原速率远低于淡水微生物。嗜盐活性污泥具有良好的沉降和絮凝繁荣，絮体粒径小，污泥结构呈网状。在河口沉积物和活性污泥中，氨氧化细菌的丰度超过了氨氧化古菌。硝化菌以亚硝化单胞菌属（Nitrosomonas）的嗜盐菌为主。本研究展示了混合嗜盐菌群在高效脱氮中的应用，克服了淡水细菌在含盐废水处理中的局限性和困难。
Nitrogen removal from hypersaline wastewater was successfully started up by inoculating estuarine sediments for 140 days. Efficient ammonia and total nitrogen removal was sustained under specific ammonia loading of 0.016–0.139 kg N/[kg VSS day] in a sequencing batch reactor. Stable nitrite accumulation was observed during nitrification. The specific ammonia consumption rate was higher than the value of freshwater activated sludge and salt-acclimated freshwater activated sludge. With methanol as carbon source, specific nitrite reduction rate of halophilic denitrifiers was much less than the freshwater counterpart. Halophilic activated sludge was characterized as good settling and flocculation prosperity with small floc size and net-like sludge structure. The abundance of ammonia-oxidizing bacteria outnumbered ammonia-oxidizing archaeas in both estuarine sediments and the activated sludge. Nitrifier population was dominated by the halophilic members of genusNitrosomonas. This study demonstrated the application of mixed halophilic consortia for efficient nitrogen removal, overcoming the limits and difficulties of applying freshwater bacteria for saline wastewater treatment.