What happens in the fermentation system is a combination of decomposition and motion by microbes. Lactic acid forms from the muscles, as would Generally happen in decomposing fish. Firstly, you hardly ever would like to open a can of surströmming indoors for reasons which I think I’ve founded by now. https://surstr-mming24680.blogozz.com/28463970/the-fact-about-thai-taste-buds-have-to-this-notoriously-strong-swedish-delicacy-that-no-one-is-suggesting