Suarez-Ojeda María Eugenia, Guisasola Albert, Baeza Juan A, Fabregat Azael, Stüber Frank, Fortuny Agustí, Font Josep, Carrera Julián
Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain.
Chemosphere. 2007 Feb;66(11):2096-105. doi: 10.1016/j.chemosphere.2006.09.035. Epub 2006 Nov 13.
This study examines the feasibility of coupling a Catalytic Wet Air Oxidation (CWAO), with activated carbon (AC) as catalyst, and an aerobic biological treatment to treat a high-strength o-cresol wastewater. Two goals are pursued: (a) To determine the effect of the main AC/CWAO intermediates on the activated sludge of a municipal WasteWater Treatment Plant (WWTP) and (b) To demonstrate the feasibility of coupling the AC/CWAO effluent as a part of the influent of a municipal WWTP. In a previous study, a high-strength o-cresol wastewater was treated by AC/CWAO aiming to establish the distribution of intermediates and the biodegradability enhancement. In this work, the biodegradability, toxicity and inhibition of the most relevant intermediates detected in the AC/CWAO effluent were determined by respirometry. Also, the results of a pilot scale municipal WWTP study for an integrated AC/CWAO-aerobic biological treatment of this effluent are presented. The biodegradation parameters (i.e. maximum oxygen uptake rate and oxygen consumption) of main AC/CWAO intermediates allowed the classification of the intermediates into readily biodegradable, inert or toxic/inhibitory compounds. This detailed study, allowed to understand the biodegradability enhancement exhibited by an AC/CWAO effluent and to achieve a successful strategy for coupling the AC/CWAO step with an aerobic biological treatment for a high-strength o-cresol wastewater. Using 30%, as COD, of AC/CWAO effluent in the inlet to the pilot scale WWTP, the integrated AC/CWAO-biological treatment achieved a 98% of total COD removal and, particularly, a 91% of AC/CWAO effluent COD removal without any undesirable effect on the biomass.
本研究考察了以活性炭（AC）为催化剂的催化湿式空气氧化（CWAO）与好氧生物处理相结合来处理高浓度邻甲酚废水的可行性。研究追求两个目标：（a）确定主要的AC/CWAO中间产物对城市污水处理厂（WWTP）活性污泥的影响；（b）证明将AC/CWAO出水作为城市污水处理厂进水的一部分进行耦合的可行性。在之前的一项研究中，采用AC/CWAO处理高浓度邻甲酚废水，旨在确定中间产物的分布及生物降解性的增强情况。在本研究中，通过呼吸测定法确定了AC/CWAO出水中检测到的最相关中间产物的生物降解性、毒性和抑制作用。此外，还介绍了中试规模城市污水处理厂对该出水进行AC/CWAO - 好氧生物联合处理的研究结果。主要AC/CWAO中间产物的生物降解参数（即最大氧摄取率和耗氧量）使得这些中间产物可被分类为易生物降解、惰性或有毒/抑制性化合物。这项详细的研究有助于理解AC/CWAO出水所表现出的生物降解性增强情况，并实现将AC/CWAO步骤与高浓度邻甲酚废水的好氧生物处理相耦合的成功策略。在中试规模污水处理厂的进水口使用30%（以化学需氧量计）的AC/CWAO出水，AC/CWAO - 生物联合处理实现了98%的总化学需氧量去除率，特别是对AC/CWAO出水的化学需氧量去除率达到了91%，且对生物量没有任何不良影响。
