Abstract
The operating pressure of the first-stage DTRO and the removal efficiency of COD, BOD, TP observed within 180 min at pH 6.5, pH 7, and pH 7.5, respectively, then the mechanism analysed and optimization methods recommended. The results show that the operating pressure reached its fastest increasing rate at pH 7.5, which grew from 32.13 to 32.66 Bar rapidly. The removal efficiency of all major pollutants increased steadily with uptime before stability. The maximum removal rates of COD, BOD, TP were 97.9%, 97.36%, and 97.7% at pH 7.5, respectively. The system performance can be improved by adjusting the pH value of the leachate to 6 ~ 7 during operation.
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