Three kinds of industrial wastewaters were treated using combined Fe-C micro-electrolysis (FCME), hydrolysis acidification (HA) and bio-contact oxidation processes. The efficiency and stability of the combined system were investigated under pilot scale experiment. The system could be operated normally under the optimum conditions, but had poor stability.As the quality of the wastewaters fluctuated, activated carbon in FCME tank, biofilm and carriers in HA tank were fouled by oil droplets. The ratio of high concentration organic wastewaters (HCOW) and clean water (CW a mixture of lower industrial wastewaters and sewage of the office block) and the way of adding CW were also investigated. When the ratio were set to 1:10, the system was more stable after changing the way of adding CW. COD of the wastewater can be removed from more than 150,000 mg/L to ~500 mg/L when the quantity or quality of the HCOW was increased by 30% in the shock test.

Stability of Fe-C micro-electrolysis and biological process on treatment of ultra-high concentration organic chemical wastewater

247th National Meeting (2014)

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