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Abstract The optimal condition of continuous inflow sludge dewatering with 2450MHz electromagnetic wave was examined by the homogeneity tests with two different sludge. Based on the test, the system was optimally operated under the power of 270W, time of 200s and sludge loading of 150mL. Under the optimal condition, the centrifugal water content, settled water content and SV of the excess sludge dropped from 90.46%, 96.35%, 88% to 87.32%, 95.55%, 76% respectively. SRF increased from 2.37?109 to 1.22?1010m/kg, and the volume of sludge was 25% less than those which were operated without 2450MHz electromagnetic wave. In addition, the biggest solubilization mulriple of TN, TP and SCOD was 17.69, 9.50 and 40.11 respectively, while EPS of sludge decreased 61.9%. To sludge of low SRF, as compared with other existed experiments, SRF didn’t decrease but increase, while the solubilization ratio of intracellular substance was much higher, and EPS decreased obviously simultaneously with better sludge dewaterability. In summary, dynamic continuous inflow sludge dewatering was better than static ones with 2450MHz electromagnetic wave.
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