have a look on these papers:

http://www.sciencedirect.com/science/article/pii/S0960852400000602

https://www.ncbi.nlm.nih.gov/pubmed/20450109

regards

Commonly the deinking sludge is treated separately from wastewater. It looks that it is not your case.

Best regards

Vit

Vit, it is being treated separately through gravity table and screw press. I need to design biological system after mixing deinking sludge and other waste. Want to understand COD reduction possible in deinking sludge treatment

Please have a look at this link and PDF attachment for insights.

https://www.academia.edu/9193570/Wastewater_treatment_options_for_paper_mills_using_recycled_paper_imported_pulps_as_raw_materials_Bangladesh_perspective

http://www.cm-consult.de/download/wwtp_read_only_3.pdf

Yashwant: commonly separated deinking sludge is not treated biologically. It is for example incinerated (https://www.doria.fi/bitstream/handle/10024/93794/nbnfi-fe201311217381.pdf?sequence=2) for energy recovery or landfilling (http://www.tandfonline.com/doi/abs/10.1080/10934529309375919?journalCode=lesa19) are acceptable means for disposal of deinking sludge.

Regards

Vit

Thanks everyone