MA Shu-ya,LI Yang-yang,HAO Meng-ya,et al.Analysis of Microwave Coupled with Fe0/H2O2 for Sludge Disintegration Based on Response Surface Methodology[J].China Water & Wastewater,2021,37(21 21):100-106.
Analysis of Microwave Coupled with Fe0/H2O2 for Sludge Disintegration Based on Response Surface Methodology
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
21 21
Page:
100-106
Column:
Date of publication:
2021-11-01
- Keywords:
- sludge disintegration degree; MLVSS/MLSS ratio; response surface methodology (RSM); microwave; Fenton-like reaction
- Abstract:
- The microwave coupled with Fe0/H2O2 (MW-Fe0/H2O2) process was applied to condition the excess sludge, and its effect on the disintegration performance of the sludge was investigated. The Box-Behnken design based on response surface methodology (RSM) was applied to establish the prediction models of sludge disintegration degree (DD) and MLVSS/MLSS ratio with pH, microwave energy (W) and H2O2/Fe0 ratio as the influencing factors, so as to realize the optimization of the process parameters. When the initial pH was 2, microwave energy was 450 kJ/L and H2O2/Fe0 ratio was 3, the disintegration degree of the sludge was the best. Under these conditions, the response value of DD and MLVSS/MLSS were (32.42±0.30)% and (23.12 ± 0.47)% respectively, which were in good agreement with the predicted values of the model. According to the measurement results of sludge particle size and the observation results of scanning electron microscope, the process could significantly reduce the sludge particle size and completely destroy the structure of the sludge flocs, so as to improve the sludge disintegration degree.
Last Update:
2021-11-01