Liu Chun, Zhou Hong-Zheng, Zhang Jing, Chen Xiao-Xuan, Zhang Lei, Guo Yan-Kai
Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
Huan Jing Ke Xue. 2017 Aug 8;38(8):3362-3368. doi: 10.13227/j.hjkx.201701151.
A combination of microbubble catalytic ozonation and biological process was used for advanced treatment of biotreated coal chemical wastewater (BCCW). The performance of the combination system and the influence of the ratio of ozone dosage to influent COD were investigated. The results indicated that the refractory nitrogen-containing aromatics in the BCCW was degraded efficiently by microbubble catalytic ozonation, which resulted in some COD removal, ammonia nitrogen release, and significant improvement of biodegradability. The ozone utilization efficiency was close to 100% and the off-gas ozone did not need to be treated. Sufficient dissolved oxygen (DO) was provided by the microbubble catalytic ozonation for biological treatment without aeration. COD and ammonia nitrogen were removed further in the biological treatment efficiently. Better performance of the combination system was achieved when the system effluent reflux ratio was 30% and the ratio of ozone dosage to influent COD was 0.44 mg·mg. In this case, for microbubble catalytic ozonation, the COD removal efficiency was 42.5%, the ratio of ozone consumed to COD removed was 1.38 mg·mg, and the ozone utilization efficiency was 98.0%. For biological treatment, the COD removal efficiency was 42.3%. For the combination system, the total COD removal efficiency was 66.7%, the average final effluent COD concentration was 91.5 mg·L, and the estimated total ratio of ozone consumed to COD removed was 0.68 mg·mg, indicating better technical and economic performance.
采用微泡催化臭氧化与生物处理相结合的方法对生物处理后的煤化工废水（BCCW）进行深度处理。研究了该组合系统的性能以及臭氧投加量与进水化学需氧量（COD）比值的影响。结果表明，微泡催化臭氧化能有效降解BCCW中难降解的含氮芳烃，导致部分COD去除、氨氮释放，并显著提高了可生化性。臭氧利用效率接近100%，尾气臭氧无需处理。微泡催化臭氧化为生物处理提供了充足的溶解氧（DO）而无需曝气。生物处理进一步有效地去除了COD和氨氮。当系统出水回流比为30%且臭氧投加量与进水COD比值为0.44 mg·mg时，组合系统性能更佳。在此情况下，对于微泡催化臭氧化，COD去除效率为42.5%，臭氧消耗与COD去除的比值为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42.3%。对于组合系统，总COD去除效率为66.7%，最终出水平均COD浓度为91.5 mg·L，估计臭氧消耗与COD去除的总比值为0.68 mg·mg，表明具有更好的技术经济性能。
