Biological treatment of leather - tanning industrial wastewater using free living bacteria has been reported. For a long time, the microorganisms in the POME were able to grow, hence reducing the amout of organic pollutants in the effluent. Three out of 17 indigenous tannery wastewater plus 3 exogenous bacterial isolates were identified and used in a batch mode remediation process as..... For more details consult https://www.iiste.org and https://www.ncbi.nlm.nih.gov

Of course, for the sonocatlysis will kill the most of microbials in the system. If you want use both, it should separate in different tank or pool. Soncalysis before microbial may increase the effectiveness of microbial reaction

Mori Liu I agree with your answer..regards

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