针对氨基酸废水COD高、SS高、SO₄^2-或CL^-含量高等特点，对氨基酸废水进行机械式蒸汽再压缩预处理，截留废水中的生物抑制物质和回收结晶的无机盐类，采用中温多级内循环厌氧反应器和高塔式内循环活性污泥好氧反应器处理氨基酸生产废水，处理后废水中的COD、BOD₅、NH₃-N分别降至120、40、25 mg/L以下，出水水质满足CJ 343—2010的C级标准。系统厌氧段产沼气量为15 000~18 000 m³/d，锅炉燃烧为车间和调节池升温提供蒸汽。

Amino acid sewage contains high concentrations of COD,SS and SO₄^2- or CL^-.It is pretreated by mechanical steam recompression to remove the biological inhibiting substances in sewage and recover crystallized inorganic salts.Then the sewage is treated by medium-temperature multi-stage internal circulation anaerobic reactor and high tower internal circulation activated sludge aerobic reactor.The contents of COD,BOD₅,and NH₃-N in sewage after treatment drop to 120 mg·L^-1,40 mg·L^-1 and 25 mg·L^-1 or less respectively,and the effluent quality can meet C-level discharge standard of CJ343-2010.The anaerobic stage can generate about 15 000-18 000 m³/d of biogas which can be used for boiler combustion to provide steam to the workshop and regulating pond.