采用物化-生化耦合处理难降解石化干法腈纶废水，开展了以多技术协同O3高级氧化与多格室A/O型膜生物（MBR）反应器为核心工艺的小试与中试试验研究。结果表明，物化-生化技术的合理耦合可显著提高石化干法腈纶废水处理中化学耗氧量（COD）、氨氮和总氮（TN）去除效果；MBR-O3氧化-曝气生物滤池（BAF）集成试验工艺稳定运行工况下，其COD、氨氮和TN去除率分别可以达到90.0 %、95.0 %和80.0 %，出水平均浓度可分别控制在100.0 mg/L、5.0 mg/L和35.0 mg/L以下。另外，由于石化干法腈纶废水水质缺少一定的可生化有机碳源以及丙烯腈低聚物和含氮杂环类有机物的难生物降解性，因此在生物脱氮过程中，有机氮向无机氨氮转化的氨化步骤限制了整体工艺脱除总氮的效果。

The lab-scale and pilot-scale physical-chemical and biochemical combined technology tests were carried out for the treatment of refractory petrochemical dry-spun acrylic fiber wastewater in Liaohe River, in which the multi-compartment anoxic/oxic membrane bioreactor (A/O MBR) and multi-technology coordinated catalyzed ozone oxidation were used as core unit process. The results showed that the removal performance could be improved significantly by reasonable coupling of physical-chemical and biochemical technologies in the treatment of acrylic fiber wastewater, the COD, ammonium and total nitrogen removal efficiency in combined process of MBR, ozone oxidation and biological aerated filter(BAF) could reach 90 %, 95 % and 80 %, respectively, and their concentration of effluent were below 100 mg/L, 5 mg/L and 35 mg/L. In addition, due to the lack of biodegradable organic carbon source and the refractory of acrylonitrile oligomers and nitrogen-containing heterocyclic organic matter in dry-spun acrylic fiber wastewater, the ammoniation steps which converted organic nitrogen to inorganic ammonium had limited the total nitrogen removal effect of overall process.