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Pilot study on chemical industrial wastewater in tertiary treatment with biofilm for washing belts

Liu J.-M., Xu Y., Zhu Z.-R., Qiao S.-Y.

Environment Protection Engineering

2011

Vol. 37, nr 1

93-104

The biochemical characteristics of chemical secondary effluent of the wastewater treatment plant of Jilin Chemical Industry Corporation have higher residual concentration of CODcr and NH3-N, and lower residual concentration of BOD5 and alkalinity. These biochemical characteristics of chemical secondary effluent in tertiary treatment were studied with a pilot system of biological contact aerators (BCAs) to meet national discharged limits and requirements for washing belts, particularly to meet national limits of ammonia and benzene substances, etc. in the air of a workshop. The highest removal efficiency was obtained in the BCAs system and a scientific basis of reference was provided for reforming the system of pulse flocculated clarifier which can constitute a new approach in tertiary wastewater treatment for washing belts.