Wastewater Treatment method for Dental Floss Manufacturing Site

Is there a special method for  treating wastewater from the dental floss manufacturing site? We are experiencing high fluctuation in BOD in the wastewater generated at our manufacturing site.

Please tell me the best water treatment method when biochemical oxygen demand (BOD) fluctuates from 1,000 ppm to 10,000 ppm?
The amount of wastewater generated per day is just 600 l.  

Other parameter fluctuations we observed were: 

Thanks!