Inhibition of Phosphate Uptake and ATP Synthesis with Organic Acid in Activated Sludge

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Acetic acid, propionic acid and n-butyric acid in wastewater inhibited the uptake of inorganic phosphate into activated sludge.The inhibition occurred around a concentration of 1×10<-3> M to 1×10<-5> M of each organic acid, and increased with an increase in the concentration of the organic acids. β-Alanine brought about a 45% recovery of the decrease of phosphate uptake caused by addition of propionin acid (1×10<-4> M). When the activated suldge was incubated in a medium containing glucose and the organic acids, the glucose was metabolized first, the acetic acid second, and the propionic acid and n-butric acid last. Acetic acid, propionic acid and n-butyric acid decreased the ATP concentration in activated sludge. Based on decreases in phosphate uptake and ATP concentration, a possible inhibition of the active transport system in microorganisms is discussed.
公益社団法人日本生物工学会の論文
1980-06-25