In this study, the performance of catalytic ozonation in the treatment of bio-treated coking wastewater (BCW) using pilot- and full-scale systems was investigated. Additionally, the removal efficiency of organic pollutants from BCW, the deactivation mechanism of Mn_xCe_1-xO₂/γ-Al₂O₃, and backflushing optimization for in-situ catalyst regeneration, which have not been previously investigated, were analysed. Results of the 12-month pilot scale experiments showed that catalytic ozonation resulted in the effective removal of organic pollutants when backflushing was applied as an in-situ catalyst regeneration strategy. The effluent chemical oxygen demand (COD) content decreased from 150 to 78 mg L⁻¹, and remained below a discharge limitation of 80 mg L⁻¹, and the stable COD removal efficiencies (from 56.0% to 47.9%) indicated that catalyst deactivation, which primarily resulted from the deposition of inorganic salts on the surface of the catalyst that limited interaction between ozone and active sites and/or prevented electrons transfer, was primarily inhibited by backflushing. The catalyst regeneration via in-situ air- and water-backflushing was attributed to the scrubbing, collision, and/or the loosing effect. Additionally, in the full-scale experiment, the catalytic ozonation process with in-situ alternative backflushing exhibited a stable COD removal efficiency (above 45.6%) for 885 days when water- and air-flushing strengths of 10 L m⁻² s⁻¹ and 15 L m⁻² s⁻¹, respectively, were applied with a 7-day regeneration interval. Therefore, the results of this study provide new insights into catalytic ozonation and support its engineering application in BCW treatment.

在这项研究中，研究了使用中试和全规模系统催化臭氧氧化处理生物处理焦化废水（BCW）的性能。此外，从BCW有机污染物的去除效率，将Mn的失活机理_X的Ce _1-x Ò ₂ /γ-Al系₂ ö ₃，和用于原位催化剂再生，其先前尚未研究反冲优化，进行了分析。12个月的中试规模实验结果表明，当将反吹法用作原位催化剂再生策略时，催化臭氧氧化可有效去除有机污染物。废水化学需氧量（COD）从150降至78 mg L ^-1，并保持在80 mg L ^-1以下的排放极限以下，稳定的COD去除效率（从56.0％至47.9％）表明催化剂失活，这主要是由于无机盐在催化剂表面的沉积所致。反冲洗主要抑制了臭氧与活性位之间的相互作用和/或阻止了电子转移。通过原位空气和水反吹进行的催化剂再生归因于洗涤，碰撞和/或松动效果。此外，在大规模实验中，当水和空气冲洗强度为10 L m ^-2  s ^-1时，在原位交替进行反冲洗的催化臭氧化工艺在885天内表现出稳定的COD去除效率（高于45.6％）。分别以7天的再生间隔施用15 L m ^-2  s ^-1和15 L m ^-2 s ^-1。因此，本研究结果为催化臭氧化提供了新的见识，并支持其在BCW处理中的工程应用。