Table 4 shows the result of ammonia stripping experiment conducted at 35 °C for the supernatant liquid of a digestion solution, which had an View the MathML source-N concentration of 2800 mg L−1. For performing the ammonia stripping the pH of the supernatant liquid was adjusted to 9.5, and the adopted nitrogen-to-liquid volumetric ratio was 3600. After the ammonia stripping the View the MathML source-N and FAN concentrations of the supernatant liquid were reduced to about 610 mg L−1 and 107 mg L−1, respectively. via a successive anaerobic digestion test, it was found that the ammonia inhibition effect was thoroughly eliminated, thus showing the feasibility of this method for removing excessive ammonia produced during anaerobic digestion.