Universidad Autónoma Metropolitana-Iztapalapa, Department of Biotechnology, Av. San Rafael Atlixco 186, C.P. 09340, Mexico.
Bioresour Technol. 2012 Sep;120:194-8. doi: 10.1016/j.biortech.2012.06.052. Epub 2012 Jun 23.
Phenolic compounds biodegradation and its effect on the nitrification process were studied. A continuous stirrer tank reactor was operated in four stages, and phenolic compounds were fed as sequential way. In the first stage, at loading rate of 220 mg NH(4)(+)-N/Ld, the consumption efficiency was of 91%, being the product, nitrate. After that, p-cresol was fed at 53 mg C/Ld, reaching removal efficiencies for both substrates higher than 90%. In the third stage, p-hydroxybenzoate was fed at 56 mg C/Ld, and the removal efficiencies for all substrates remained high. In the last stage, the reactor was fed at 54 mg C/Ld of phenol, and it caused a diminishing on the ammonium removal efficiency; however, all phenolic compounds were efficiently removed. Kinetic results showed that the presence of each phenolic compound improved the ammonium oxidizing activity, but the nitrite oxidizing activity was not affected.
研究了酚类化合物的生物降解及其对硝化过程的影响。采用连续搅拌釜式反应器进行了四个阶段的实验，采用顺序进料的方式添加酚类化合物。在第一阶段，在 220mgNH(4)(+)-N/Ld 的负荷率下，消耗效率达到 91%，产物为硝酸盐。然后，以 53mgC/Ld 的速率进料对甲酚，对两种基质的去除效率均高于 90%。在第三阶段，以 56mgC/Ld 的速率进料对羟基苯甲酸，所有基质的去除效率仍然很高。在最后一个阶段，以 54mgC/Ld 的速率进料苯酚，导致铵去除效率降低；然而，所有酚类化合物都被有效地去除。动力学结果表明，每种酚类化合物的存在都提高了铵氧化活性，但亚硝酸盐氧化活性不受影响。
