ABR＋生物接触氧化法处理高浓度有毒有机废水

摘要

The combined process of ABR and biological contact oxidation is used to treat organic wastewater which contains phenol and high COD .The toxicity -resistance and the removal efficiencies of COD ,phenol and NH3 -N of ABR have been experimentally studied .The results show that the removal of COD and phenol mainly happens in the anaerobic stage . When the mass concentration of phenol is 1 000 mg/L ,the removal efficiencies of COD and phenol of the ABR and traditional anaerobic reactor are both decreased obviously ,but the toxicity -resistance ability of ABR reactor is higher than that of the traditional anaerobic reactor .The hydraulic characteristic of ABR makes the acidogenic bacteria and methanogen separated , resulting in its stronger toxicity -resistance ability and higher removal efficiencies of COD and phenol than that of the tradition-al anaerobic reactor .However ,the NH3 -N removal efficiency can’t be strengthened obviously by the ABR reactor .%本文采用ABR＋生物接触氧化组合工艺处理含苯酚的高COD有毒有机废水，实验研究了ABR反应器的抗毒性及对COD、苯酚和NH3－N的处理效果。实验结果表明：废水COD和苯酚的去除主要发生在厌氧阶段；在苯酚质量浓度1000 mg／L左右时，ABR反应器和常规厌氧反应器的处理效率均出现明显的下降趋势，但ABR反应器对苯酚的耐受浓度明显高于常规厌氧反应器；相比于常规厌氧反应器，ABR反应器推流式的特性实现了产酸和产甲烷优势菌群的分离，具有较高的COD、苯酚的去除率和较强的抗毒性；对NH3－N的去除，ABR反应器的强化效果不明显。