• 关键词：PACT工艺  A²/O工艺,生物强化  生物载体

• 基金项目：国家水体污染控制与治理科技重大专项（No.2012ZX07101-003，2012ZX07301-005）

• 张龙
• 1. 江苏省环境科学研究院, 南京 210036;2. 江苏省环境工程重点实验室, 南京 210036

• 涂勇
• 1. 江苏省环境科学研究院, 南京 210036;2. 江苏省环境工程重点实验室, 南京 210036

• 吴伟
• 1. 江苏省环境科学研究院, 南京 210036;2. 江苏省环境工程重点实验室, 南京 210036

• 刘伟京
• 1. 江苏省环境科学研究院, 南京 210036;2. 江苏省环境工程重点实验室, 南京 210036

• 摘要：采用A²/O（PACT）工艺处理水解酸化后的印染废水，对其生物强化效果进行了表征.结果表明：在粉末活性炭投加量为100 mg · L^-1的条件下，对比A²/O工艺，A²/O（PACT）对COD的去除率提升超过10%，其处理能力可以达到0.6~1.0 kg · kg^-1活性炭，有效提升了系统的冬季运行效果.GC-MS、毒性表征结果表明，A²/O（PACT）针对苯环类、稠环类、杂环类等特征有机污染物具有更好的处理效果.紫外-可见光光谱以及分子量分布检测结果表明：A²/O（PACT）对大分子物质（染料类、腐殖类显色物质等，800~1000 Da）的去除有较为明显的促进效果.此外，针对污泥的镜检发现，A²/O（PACT）活性污泥中具备更加完整的生物相，SEM检测结果也表明，PACT系统中粉末活性炭的生物载体作用明显.

• Abstract：The improved performance of A²/O(PACT) technology is characterized in comparison with conventional A²/O process in treatment of dyeing wastewater after hydrolysis acidification. The result shows that COD removal increased over 10% in A²/O(PACT) under a certain dosing quantity (100 mg · L^-1) of powdered active carbon (PAC), while the experimental result demonstrates that treatment capacity of A²/O(PACT) could reach 0.6~1.0 kg · kg^-1 PAC, and its operating efficiency and stability is greatly improved in winter. In addition, A²/O(PACT) process exhibits a higher removal efficiency in aromatic-, polycyclic-and heterocyclic-compounds characterized by GC-MS. The treatment performance for macro-molecular substance (e.g. dyestuff and humus with molecular weight of 800~1000 Da) is also improved by A²/O(PACT) detected by UV-VIS spectrometer and Gel permeation chromatography. Meanwhile, microscopic examination and electronic microscope photograph analysis show that A²/O(PACT) has a more complete biological biofacies, and the enhancement of PACT process could be attributed to the biological carrier role of the PAC.

• Key words：PACT process  A²/O process  bioaugmentation  biological carrier

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