We have an industry that wishes to discharge a waste containing Polyethylene Glycol (PEG) which is used in the process of cutting silicon wafers.  It has a COD in the millions (!!) but a BOD of only around 50,000 mg/l, so it does not seem to be very amenable to aerobic treatment.  Incidentally, WW plants have been receiving PEGs for quite a while as certain of them are used in the stuff you get to drink the night before a colonoscopy!!!  Whatever, my question has to do with whether anyone has determined in PEG's are treatable by ANaerobic digestion.  AND...how would you test anaerobic treatability??

PS:  don't confuse PEGs with antifreezes.  They are related to the propylene glycol in antifreeze but are much larger molecules with sizes from 400 to 1000 daltons.