Ledakowicz Stanislaw, Michniewicz Malgorzata, Jagiella Agnieszka, Stufka-Olczyk Jadwiga, Martynelis Maria
Department of Bioprocess Engineering, Technical University of Lodz, Wolczanska 213, 93-005 Lodz, Poland.
Water Res. 2006 Oct;40(18):3439-46. doi: 10.1016/j.watres.2006.06.038. Epub 2006 Sep 7.
Wood pulping and paper production generate a considerable amount of wastewater, containing many pollutants among them resin and fatty acids. Resin acids contribute substantially to effluent toxicity and were identified to be detrimental to microorganisms of activated sludge and in particular to bacteria in anaerobic wastewater treatment system and other forms of aquatic life. The objective of the present study was to check the applicability of the ozone and advanced oxidation processes (AOPs) to eliminate resin acids from aqueous solutions and to determine the ozone dose required. Furthermore, an investigation of the influence of the oxidation methods on subsequent biological destruction of the byproducts was performed. Aqueous solution of the resin acids: abietic, dehydroabietic and isopimaric acids with different initial composition were subjected to ozonation or AOP processes at different ozone doses. After ozonation or advanced oxidation pretreatment the model solutions were biodegraded in aerated vessels containing activated sludge. During ozonation of the resin acids aqueous solutions the resin acids were almost eliminated, however the reduction of chemical oxygen demand (COD) was rather low. The ozone dose required to obtain reduction of resin acids >90% was in the range of 0.1-0.7mgO(3)/mgCOD, depending on the composition and concentration of model solutions. The toxicity of ozonated resin acids solutions decreased with increasing applied ozone dose up to about 0.3-0.5mgO(3)/mgCOD, thereafter increased. Ozonation and other AOP processes did not increase the rate of biodegradation of resin acids model solutions in aerated activated sludge systems compared to not pretreated solutions.
木材制浆和造纸生产会产生大量废水，其中含有许多污染物，包括树脂和脂肪酸。树脂酸对废水毒性有很大影响，已被确定对活性污泥中的微生物，特别是厌氧废水处理系统中的细菌和其他水生生物有害。本研究的目的是检验臭氧和高级氧化工艺（AOPs）去除水溶液中树脂酸的适用性，并确定所需的臭氧剂量。此外，还对氧化方法对副产物后续生物降解的影响进行了研究。将具有不同初始组成的树脂酸（枞酸、脱氢枞酸和异海松酸）水溶液在不同臭氧剂量下进行臭氧化或AOPs处理。臭氧化或高级氧化预处理后，模型溶液在含有活性污泥的曝气容器中进行生物降解。在树脂酸水溶液臭氧化过程中，树脂酸几乎被去除，但化学需氧量（COD）的降低幅度相当小。根据模型溶液组成和浓度的不同，使树脂酸减少>90%所需的臭氧剂量在0.1 - 0.7mgO₃/mgCOD范围内。臭氧化树脂酸溶液的毒性随着臭氧剂量增加到约0.3 - 0.5mgO₃/mgCOD而降低，此后又升高。与未预处理的溶液相比，臭氧化和其他AOPs工艺并未提高曝气活性污泥系统中树脂酸模型溶液的生物降解速率。
