Treatment of winery wastewater by ozone-based advanced oxidation processes (O3, O3/UV and O3/UV/H2O2) in a pilot-scale bubble column reactor and process economics
Treatment of winery wastewater by ozone-based advanced oxidation processes (O3, O3/UV and O3/UV/H2O2) in a pilot-scale bubble column reactor and process economics
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DOI：
10.1016/j.seppur.2010.01.016
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发表时间：
2010-05
影响因子：
8.6
通讯作者：
M. Lucas;J. Peres;G. L. Puma
中科院分区：
文献类型：
--
作者：
M. Lucas;J. Peres;G. L. Puma
在中试汽泡塔反应器中，考察了不同臭氧深度氧化工艺（O3、O3/UV和O3/UV/H2O2）处理酒厂废水的效果。在废水的自然pH值（pH 4）下，各AOP的有效性依次为：O3/UV/H2O2>O3/UV>O3>UV- c。在中性（pH 7）和碱性（pH 10）条件下，化学需氧量（COD）和总有机碳（TOC）的去除率均有所提高。讨论了每个AOPs所涉及的基础化学，并将其与观察到的反应性相关联。实验过程中，O3/UV和O3/UV/ h2o2工艺的臭氧消耗率在70-95%之间，表明系统对臭氧的有效利用。在所有的实验中，用拟一级表观反应动力学描述了酒废水有机负荷的消失。在最佳氧化剂剂量（COD/H2O2=2）下，O3/UV/H2O2工艺在废水自然pH下的最快速率常数（6.5×10−3min−1）。对AOPs工艺运行成本的经济分析表明，O3/UV/ h2o2是处理酒厂废水最经济的工艺（优化条件下TOC矿化量为1.31Eurom−3g−1）。
The effectiveness of different ozone-based advanced oxidation processes (O3, O3/UV and O3/UV/H2O2) on the treatment of winery wastewater was investigated in a pilot-scale, bubble column reactor. At the natural pH of the wastewater (pH 4) the effectiveness of each AOP followed the sequence: O3/UV/H2O2>O3/UV>O3>UV-C. The rate of chemical oxygen demand (COD) and total organic carbon (TOC) removal were enhanced by operation at neutral (pH 7) and at alkaline pH (pH 10). The underlying chemistry involved in each of the AOPs is discussed and correlated with the observed reactivity. The rate of ozone consumption in the reactor with the O3/UV and O3/UV/H2O2processes was in the range of 70–95% during the experiments, suggesting an effective use of the ozone supplied to the system. In all the experiments the disappearance of the winery wastewater organic load was described by pseudo-first-order apparent reaction kinetics. The fastest rate constant (6.5×10−3min−1), at the natural pH of the wastewater, was observed with the O3/UV/H2O2process under optimised oxidant dose (COD/H2O2=2). An economic analysis of the operating costs of the AOPs processes investigated revealed the O3/UV/H2O2to be the most economical process (1.31Eurom−3g−1of TOC mineralised under optimised conditions) to treat the winery wastewater.