Fishing for BOD and suspended solids data

[a-mad]

I'm wondering if anyone has any ballpark numbers for BOD & S/S data regarding typical brewery effluent. I'm trying to put together some info for the local municipal water treatment. I've seen numbers of 1,100 to 1,500 mg/l for BOD, but I'm not sure if thats an average over total flow, or a particular segment of waste water. Wondering if anyone has a breakdown of averages, kettle bottoms, fermenter dregs, finished beer, packaging...? Ultimately I'm trying to guage how sophisticated or simple pretreatment might need to be.
Thanks, Aran

[nohandslance]

BOD concentrations

Our brewery has, rounded to a very wide average:
Brewery Effluent from BH and Cellar: 1200mg 02/l
last/final runnings from lauter: 8000 - 11000mg 02/l
yeast slurry/non racked beer: 70000 - 85000mg 02/l
The city wanted the BOD test completed, but only
required us to install a batch PH treatment buffer tank
so the discharge was at a PH level between 6.5 and 8.0;
this was based on three seperate samples at each location.
Base line should be of a domestic waste water sample, which
should be around 500mg 02/l.

[Alex T]

hi,

if you have a look in Kunze "Technology Brewing and Malting" there are some typical values listed in the waste disposal/environment section. he has listed overall for brewery effluent BOD5 = 1200 mg O2/L. there is some other data in the book, so check it out if you have a copy. it will depend on how you operate your process. for example, what you do with your yeast? - do you send it down the drain? you may expect values 3 times this amount.

alex