DONG Kun,WEI Xue-rui,XU Lu-feng,et al.Optimization of Anammox-MBR Process by Response Surface Methodology and Membrane Characterization[J].China Water & Wastewater,2022,38(2022 1 1):95-103.
Optimization of Anammox-MBR Process by Response Surface Methodology and Membrane Characterization
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
2022 1 1
Page:
95-103
Column:
Date of publication:
2022-01-01
- Keywords:
- membrane bioreactor; Anammox; Box?Behnken response surface methodology; parameter optimization
- Abstract:
- Anammox in the membrane bioreactor (MBR) often faces problems such as difficulty in regulating reaction parameters and enrichment of functional species. Influence factors of Anammox-MBR were explored by using Box?Behnken response surface methodology, and a quadratic regression equation for predicting total nitrogen removal efficiency was obtained. Under the optimal conditions of total nitrogen removal (temperature of 36 ℃, HRT of 10.01 h and inorganic carbon source concentration of 0.90 mg/L), the measured total nitrogen removal efficiency (88.98%) after response surface optimization was basically consistent with the predicted value (89.29%) simulated by the model fitted by response surface methodology, indicating that the model could be used to optimize the removal efficiency of total nitrogen by the Anammox-MBR. After the optimization by response surface methodology, both the thermodynamic stability and activation energy of the PVDF hollow fiber membrane decreased. The functional groups on the surface of the membrane changed, in which aldehyde carbonyl group, carboxylic acid carbonyl group, ester carbonyl group and the ketone carbonyl group appeared. The attachment of sludge, microorganisms and other substances on the surface of the PVDF membrane in the process of adjustment and optimization led to the increase of roughness and an overall profile towards membrane fouling.
Last Update:
2022-01-01