LUOKeng-jun,YANGShu-han,LIUXiao-bin,et al.Manganese Removal Using High?pressure Gas Fluidized Ceramsite Coupled with Ceramic Membrane Reactor[J].China Water & Wastewater,2024,40(21):27-33.
Manganese Removal Using High?pressure Gas Fluidized Ceramsite Coupled with Ceramic Membrane Reactor
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第21期
Page:
27-33
Column:
Date of publication:
2024-11-01
- Keywords:
- ceramsite; birnessite; ceramic membrane; high-pressure gas fluidization; manganese removal
- Abstract:
- Excessive levels of manganese ions in groundwater can affect the taste of drinking water and pose risks to human health. This work developed an integrated system for manganese removal utilizing high-pressure gas fluidized ceramsite coupled with a gravity-driven ceramic membrane. Specifically, the system achieved efficient and stable manganese removal based on the synergistic effect of pre-prepared manganese oxides, the rapid initial enrichment of manganese-oxidizing bacteria, and the great autocatalytic oxidation capacity of birnessite. Intermittent high-pressure gas aeration was employed for fluidifying the ceramsite to peel off the fouling layer on the membrane surface. Thereby, the water purification performance of the integrated device also could be enhanced with the membrane fouling mitigating.The system exhibited excellent manganese removal performance and water production capability. With an influent manganese concentration of 0.5 mg/L, the effluent manganese concentration could be reduced to 0.01 mg/L with the removal rate of 98%. In the stable stage, the effluent manganese concentration was maintained at a stable level (<0.1 mg/L), with the membrane flux consistently at 20 L/(m2·h). After the experiment, XPS, XRD, SEM, and infrared analysis were conducted on samples from the functional layer within the reactor, confirming that the presence of birnessite was critical for manganese removal in this system.
Last Update:
2024-11-01