| Popis: |
In order to cope with the coking wastewater no longer being used as spray water for quenching coke, the indirect discharge process and indirect discharge process of coking wastewater treatment were proposed based on the investigation of coking projects and literature research. The direct discharge process was “pretreatment-hydrolytic acidification-A/O-secondary settling tank-activated carbon loading high-efficiency sedimentation tank”, which could be applied to in-situ upgrading, and had the characteristics of less investment, renovation period and remarkable improvement of effluent. The direct discharge process was “pretreatment-hydrolytic acidification-A/O-secondary settling tank-high efficiency settling tank-ozone catalytic oxidation-A/O-high efficiency settling tank”, which could be applied to reconstruction, expansion and new construction projects, with the characteristics of stable effluent quality and complete removal of refractory organic matter. In this paper, the key design points of the two processes and the industrial application cases of the indirect emission process were briefly introduced, and the suggestions of “fine operation and control” were put forward according to the problems in the industrial application. |
