短程硝化-厌氧氨氧化组合工艺对氨淋洗液的处理效果  

Treatment of ammonia percolate by a combined process of shortcut nitrification and anaerobic ammonium oxidation

作　　者：张蕾[1,2] 孙宏佶 牟英东 张博 ZHANG Lei;SUN Hongji;MU Yingdong;ZHANG Bo(Department of Marine Science and Environment,Dalian Ocean University,Dalian 116023,China;Pratt School of Engineering,Duke University,Durham 27708,USA)

机构地区：[1]大连海洋大学环境工程系,大连116023 [2]杜克大学普莱特工程学院,德罕姆27708,美国

出　　处：《环境工程学报》2020年第11期2989-2998,共10页Chinese Journal of Environmental Engineering

基　　金：辽宁省自然科学基金资助项目(20180550974)。

摘　　要：为证明短程硝化-厌氧氨氧化组合工艺处理氨淋洗液的可行性,采用生物滴滤池(BTF)进行氨淋洗液的短程硝化,然后利用厌氧氨氧化上流式厌氧污泥床(UASB)对淋洗液进行脱氮处理。结果表明:当氨浓度为0.03~0.31 mg·L-1时,80%以上的氨被淋洗至液相,淋洗液中28%~84%的氮素可通过后续厌氧氨氧化过程被去除;在低、高氨负荷(0.072~0.72 kg·(m3·d)-1)时,BTF均可实现对氨淋洗液的短程硝化,证明亚硝酸的积累与氨负荷无明显关系;利用淋洗液中游离氨、游离亚硝酸对氨氧化细菌和亚硝酸氧化细菌的抑制作用以及O2传质的限制作用实现短程硝化。保证短程硝化BTF中亚硝酸积累、氨吸收效果、氨生物转化效率的最佳回流比为1∶2。上述研究结果可为采用短程硝化-厌氧氨氧化组合工艺处理氨淋洗液提供参考。In order to prove the feasibility of the combined process of shortcut nitrification and anaerobic ammonium oxidation(anammox) treating ammonia percolate, a biotrickling filter(BTF) was used to perform shortcut nitrification of ammonia percolate, and the subsequent anammox UASB was used to conduct denitrification treatment from the percolate. The results showed that more than 80% gaseous ammonia was transferred to liquid phase in the BTF when ammonia content was 0.03~0.31 mg·L-1, and 28%~84% of the total nitrogen in the percolate could be removed through the following anammox process. At both low and high ammonia loading of 0.072~0.72 kg·(m3·d)-1, BTF could achieve shortcut nitrification for the percolate, which proved that nitrite accumulation was irrelative with ammonia loading. Shortcut nitrification could be well controlled through the inhibition effect of free ammonia and free nitric acid on ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, as well as oxygen mass transfer limitation effect. The optimal recycle ratio for nitrite accumulation, ammonia removal and biological ammonium conversion was 1∶2. The results provided a reference for a combined process of shortcut nitrification and anaerobic ammonium oxidation treating ammonia percolate.

关 键 词：短程硝化 厌氧氨氧化 生物滴滤池 氨淋洗液 

分 类 号：X703[环境科学与工程—环境工程]