In the article titled “Inhibitory Effect of Long-Chain Fatty Acids on Biogas Production and the Protective Effect of Membrane Bioreactor” [1], the word “stabil” is misspelled in section “3.2.2. Volatile Fatty Acid and pH.” It should be corrected to “stable.” In addition, the bar charts for the encased cell of Figure  3 are not clear. A clearer version can be found as follows.