Fig. 1From: Sulfide level in municipal sludge digesters affects microbial community response to long-chain fatty acid loadsExperimental setup showing the organic loading rate (OLR) of primary and activated sewage sludge (PASS), oleate, and stearate, together with the estimated and measured concentrations of total sulfur (S), in laboratory-scale digesters F1, F2, F3, F4, F5, and F6Back to article page