Abstract: Acrylonitrile/acrylic fiber wastewater has a high concentration of pollutants and contains oligomers that are difficult to be treated biochemically and has become a problem for enterprises to discharge wastewater up to standard. This paper introduces the engineering practice and experimental research of acrylic fiber wastewater treatment in domestic enterprises and the engineering practice of treating acrylic fiber wastewater by PACT/WAR process. The engineering operation shows that the treatment effect of this process is good for oil refining and chemical wastewater including acrylonitrile/acrylic fiber wastewater. It can achieve the first level of direct discharge standard. Aiming at the problems in operation, the corresponding solutions and optimization suggestions are put forward.

Key words: PACT/ WAR, acrylic fiber wastewater, regenerated carbon, removal total nitrogen