Effects of high free ammonia concentrations on the performances of anaerobic bioreactors
Effects of high free ammonia concentrations on the performances of anaerobic bioreactors
复制标题
DOI：
10.1016/j.procbio.2004.05.008
复制
发表时间：
2005-03-01
影响因子：
4.4
通讯作者：
Yenigun, O
中科院分区：
文献类型：
--
作者：
Calli, B;Mertoglu, B;Yenigun, O
接种不同种泥的UASB反应器在高氨氮浓度下运行450 d，考察其抑制效果。向反应器进料合成废水，该合成废水提供约1.2 kg COD m（3）/天的有机负荷，并且总氨氮（TAN）浓度从1000 mg/l逐渐增加至6000 mg/l。当相应的游离氨氮（FAN）浓度升高到800 mg/l时，测定COD去除率在78-96%的范围内。高去除效率表明，从厌氧反应器处理相当低的含氨废水的种子污泥已经成功地适应了升高的游离氨浓度。然而，丙酸积累在一些反应器和荧光原位杂交（FISH）检测到的真细菌信号的减少表明，丙酸降解产乙酸细菌比产甲烷古菌更敏感的游离氨。反应器效率的差异与反应器中占优势的抗性和敏感微生物的数量有关。(C)2004 Elsevier Ltd.保留所有权利。
UASB reactors inoculated with different seed sludges were operated for 450 days under high ammonia concentrations to investigate inhibition effects. Reactors were fed with synthetic wastewater providing an organic loading of about 1.2 kg COD m(3) /day and having total ammonia nitrogen (TAN) concentrations gradually increasing from 1000 to 6000 mg/l. As, corresponding free ammonia nitrogen (FAN) concentrations elevated up to 800 mg/l, COD removal efficiencies in the range of 78-96% were determined. High removal efficiencies revealed that seed sludges taken from anaerobic reactors treating considerably low ammonia containing wastewaters have adapted to elevated free ammonia concentrations successfully. However, propionate accumulation in some reactors and decrease in eubacterial signals detected by fluorescent in situ hybridization (FISH) indicated that propionate degrading acetogenic bacteria are more sensitive than methanogenic archaea to free ammonia. Differences in the efficiencies of reactors were correlated with the quantity of resistant and sensitive microorganisms dominated in the reactors. (C) 2004 Elsevier Ltd. All rights reserved.