Being from China, Im used to this, but they do it at my bia tuoi too. dip down big buckets into the sewer, skim the oil off, sell it as cheap cooking oil. Here though, they just let it settle and decant it - dont even attempt to process it !!!
I guess if it gets up to 300 degrees or something it shouldnt have any germs but the fact is engine oil is poured down drains here too and that killed 10,000 at least of cancer in spain in the 1980s.........
had my phablet stolen but will try n get photos later
the smell is atrocious