Department of Chemical Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
Water Res. 2014 Jan 1;48:354-62. doi: 10.1016/j.watres.2013.09.048. Epub 2013 Oct 9.
Several chemical industries produce wastewaters containing both, ammonium and phenolic compounds. As an alternative to treat this kind of complex industrial wastewaters, this study presents the simultaneous partial nitritation and o-cresol biodegradation in a continuous airlift reactor using aerobic granular biomass. An aerobic granular sludge was developed in the airlift reactor for treating a high-strength ammonium wastewater containing 950 ± 25 mg N-NH4(+) L(-1). Then, the airlift reactor was bioaugmented with a p-nitrophenol-degrading activated sludge and o-cresol was added progressively to the ammonium feed to achieve 100 mg L(-1). The results showed that stable partial nitritation and full biodegradation of o-cresol were simultaneously maintained obtaining a suitable effluent for a subsequent anammox reactor. Moreover, two o-cresol shock-load events with concentrations of 300 and 1000 mg L(-1) were applied to assess the capabilities of the system. Despite these shock load events, the partial nitritation process was kept stable and o-cresol was totally biodegraded. Fluorescence in situ hybridization technique was used to identify the heterotrophic bacteria related to o-cresol biodegradation and the ammonia oxidising bacteria along the granules.
一些化工行业会产生同时含有氨和酚类化合物的废水。作为处理这种复杂工业废水的一种替代方法，本研究提出了在气升式反应器中利用好氧颗粒污泥同时进行部分亚硝化和邻甲酚生物降解。在气升式反应器中开发了好氧颗粒污泥，用于处理含有 950±25mg N-NH4 (+) L(-1)的高强度氨废水。然后，通过向氨进料中逐步添加邻甲酚，使气升式反应器进行生物增强，达到 100mg L(-1)。结果表明，同时维持了稳定的部分亚硝化和邻甲酚的完全生物降解，获得了适合后续厌氧氨氧化反应器的出水。此外，还进行了两次邻甲酚冲击负荷实验，浓度分别为 300mg/L 和 1000mg/L，以评估系统的能力。尽管存在这些冲击负荷，部分亚硝化过程仍保持稳定，邻甲酚被完全生物降解。荧光原位杂交技术用于鉴定与邻甲酚生物降解相关的异养细菌和颗粒中的氨氧化细菌。
