正渗透微生物燃料电池处理污泥

Waste Activated Sludge Treatment in an Osmotic Microbial Fuel Cell (OsMFC)

摘要:

采用正渗透微生物燃料电池（OsMFC）浓缩消化剩余污泥，并将污泥化学能转化为清洁电能回收.结果表明:在外阻为470 Ω时，OsMFC输出电压为200~212 mV，输出功率密度为218~244 mW·m-3；由于正渗透（FO）膜浓缩作用，反应器运行结束时，污泥体积减少为原体积的41.3%，系统产水率为58.7%；在24 d运行过程中，阳极室内污泥总化学需氧量、混合液悬浮固体、混合液挥发性悬浮固体消解率分别为22.2%,32.8%和47.6%.

Abstract:

An osmotic microbial fuel cell (OsMFC) was used for simultaneous thickening and digestion of waste activated sludge (WAS) and converting chemical energy of WAS to clean electricity. The results show that with the load of external resistance of 470 Ω, the stable voltage output and power density reach 200~212 mV and 217~244 mW·m-3, respectively. Due to the use of forward osmosis(FO) membrane, the volume of initial WAS is decreased by 41.3% at the end of operation, and 58.7% of the water in WAS is recovered in the draw solution. During 24 d operation of OsMFC, the total destruction efficiencies of total chemical oxygen demand, mixed liquor suspended solids and mixed liquor volatile suspended solids are approximately 22.2%, 32.8% and 47.6%, respectively. OsMFC brings new visions for energy recovery and resource reclamation from WAS.