I am looking for recommendations on large food grade bins I could use for letting my bread dough rise. I am making 50 pound batches at a time.
At the bakery where i worked we used tubs similar to what bus boys use, but they had lids and were semi transparent. If you go to any restaurant supply you can find something suitable. Some bakeries use clear round 5 gallon buckets with graduated markings. Basically the item you're looking for holds about 15-20 lbs of dough and costs $10-15. You just divide the dough to fit the container, and also for ease of lifting.
The bins I use to mix my 24# batches are here:
In case there are questions as to food safety - from their website FAQ:
Q: What materials are used to manufacture Sterilite products?A: Our products are made of polypropylene and polyethylene that are safe for food storage. No PVCs, Latex, Teflon, Phthalates chemicals, fungicides, Bishphenol A (BPAs), or antibacterial chemicals are used in our manufacturing process. Our clear (see-through) products are acid-free, and safe for storing photos, fabrics, craft, or hobby items and other keepsakes. We do not recommend the use of plastic products for negatives that are glass plate, nitrate or acetate-based.
...but my batch size is only 9 kg (a dozen loaves in my WFO). I do three or four hand-mixed batches on bake day.