用于橄榄油厂废水处理的氧化工艺。

Oxidative processes for olive mill wastewater treatment.

作者信息

Bettazzi E, Caretti C, Caffaz S, Azzari E, Lubello C

机构信息

Department of Civil Engineering, University of Florence, Via Santa Marta 3, 50139 Florence, Italy.

出版信息

Water Sci Technol. 2007;55(10):79-87. doi: 10.2166/wst.2007.309.

DOI:10.2166/wst.2007.309

PMID:17564373

Abstract

The present work describes an experimental study carried out in order to investigate the efficiency and feasibility of physical (lime coagulation) and advanced oxidation processes (Ozone and Fenton's process) for olive oil mill wastewater treatment. Particular attention was paid to the degradation of both organic and phenolic compounds. Lime coagulation reaches maximum removal at a pH of 12, with a TP (total polyphenols) and COD reduction of 37 and 26%, respectively. Ozone oxidation is also pH-dependent, showing the higher removal efficiency (91% for TP and 19% for COD) with an initial pH value of 12. Experimental results show a lower efficiency of Fenton's process than ozone in TP removal, reaching a maximum value of 60%. Oxidation trials carried out on gallic and p-coumaric synthetic solutions confirmed ozone and Fenton's efficiency at degrading phenolic compounds. Biological trials, both aerobic and anaerobic, highlighted a significant increase of biodegradability of treated OMW samples if compared to the untreated ones. Respirometric tests showed an increase in BOD of about 20% and anaerobic batch tests provided a methane production up to eight times higher.

摘要

本研究描述了一项实验研究，旨在探究物理（石灰混凝）和高级氧化工艺（臭氧和芬顿工艺）处理橄榄油厂废水的效率和可行性。特别关注了有机化合物和酚类化合物的降解情况。石灰混凝在pH值为12时达到最大去除率，总多酚（TP）和化学需氧量（COD）的去除率分别为37%和26%。臭氧氧化也依赖于pH值，初始pH值为12时显示出更高的去除效率（TP为91%，COD为19%）。实验结果表明，芬顿工艺在去除TP方面的效率低于臭氧，最高可达60%。对没食子酸和对香豆酸合成溶液进行的氧化试验证实了臭氧和芬顿工艺在降解酚类化合物方面的效率。需氧和厌氧生物试验均表明，与未处理的橄榄油厂废水样品相比，处理后的样品生物降解性显著提高。呼吸测定试验显示生化需氧量增加了约20%，厌氧批次试验产生的甲烷量高达未处理样品的八倍。