水和能源的短缺，增加了对低能耗海水淡化方法的需求。微生物脱盐电池是其中最重要的方法之一。本研究采用空气阴极MDC进行海水淡化。最大电压、功率和电流密度分别为607mV、521mW/m²和858mA/m² (25mM PBS)和701mV、695mW/m²和992mA/m² (50mM PBS)。50mM PBS产生的电压约为25mM PBS的1.5倍。在这种情况下，初始化的海水EC电导率下降48.31±3% (25mM PBS)和46.71±2.73% (50mM PBS)。随着中间室海水含盐量的降低，合成废水和阴极液中的电导率略有增加。结果表明，合成废水中EC的变化率为44.20 ±11.94(25mM PBS)和27.94 ± 3 (50 mM PBS) and in catholyte was 211.66 ± 22.41(25mM PBS) and 119.24 ± 11.25 (50 mM PBS) respectively. These results show that the MDC can also be used as a pretreatment to reverse osmosis; simultaneously the energy required in this process is also partly meet.