The advanced treatment performance of real bio-treated coal chemical wastewater (BCCW) by a novel combination of microbubble catalytic ozonation and biological process was investigated. The refractory compounds in BCCW could be degraded effectively by microbubble catalytic ozonation treatment, which resulted in efficient COD removal, inorganic nitrogen release and significant improvement of biodegradability. The dissolved oxygen (DO) supplied by microbubble catalytic ozonation was also enough for aerobic digestion in the following biological treatment even without aeration. The biodegradable COD and ammonia nitrogen released in microbubble catalytic ozonation treatment could be removed further in the following biological treatment efficiently. There was no off-gas ozone required to be treated due to high ozone utilization efficiency of close to 100%. The ratio of ozone dosage to influent COD amount showed a marked impact on the performance of the combination treatment system and its optimal value obtained in this study was 0.44 mg/mg. In this case, for microbubble catalytic ozonation, the COD removal efficiency was 32.16%, the ratio of ozone dosage to COD removed was 1.38 mg/mg and the ozone utilization efficiency was 98.0%. For biological treatment, the COD removal efficiency was 41.93%. For the combination system, the total COD removal efficiency was 60.82%, the average final effluent COD concentration was 91.5 mg/L and the estimated total ratio of ozone dosage to COD removed was 0.68 mg/mg. Therefore, the combination of microbubble catalytic ozonation and biological process is an effective and economical solution for advanced treatment of BCCW.

研究了微泡催化臭氧化和生物工艺相结合的新型生物处理煤化工废水（BCCW）的先进处理性能。微泡催化臭氧化处理可有效降解BCCW中的难熔化合物，从而有效去除COD，释放无机氮并显着提高生物降解性。即使在不进行曝气的情况下，通过微气泡催化臭氧化作用提供的溶解氧（DO）也足以在随后的生物处理中进行好氧消化。微泡催化臭氧化处理中释放出的可生物降解的COD和氨氮可以在随后的生物处理中进一步有效地去除。由于接近100％的高臭氧利用率，因此不需要处理任何废气中的臭氧。臭氧剂量与进水COD量之比对联合处理系统的性能有显着影响，本研究获得的最佳值为0.44 mg / mg。在这种情况下，对于微泡催化臭氧化，COD去除效率为32.16％，臭氧剂量与去除的COD之比为1.38 mg / mg，臭氧利用效率为98.0％。对于生物处理，COD去除效率为41.93％。对于组合系统，总的COD去除效率为60.82％，平均最终废水COD浓度为91.5 mg / L，估计的臭氧剂量与去除的COD的总比例为0.68 mg / mg。所以，