Research Progress in Membrane Fouling of Membrane Bioreactor

Membrane bioreactor(MBR)has been becoming a popular technology in wastewater treatment due to its advantages with good treatment efficiency.However,membrane fouling prevented its wide application in water treatment.In this paper,the mechanism of membrane fouling was summarized,and the improvement methods were introduced.Operational parameters were emphasized in the running plants.

氧化锌纳米颗粒增强的窄带隙聚合物近红外光响应晶体管

近红外有机光响应晶体管因在热成像、夜视以及人体健康监测等方面的广泛应用而受到人们的密切关注.目前,近红外有机光响应晶体管的性能还不够高,离实际应用还有一定的距离.本研究选用窄带隙共轭聚合物半导体(DPP-DTT)作为光响应媒介,通过溶液加工方法,将聚合物制备成纳米网格,并将其应用于近红外光响应晶体管中.研究了基于DPP-DTT聚合物纳米网格的光响应晶体管的电学性质和近红外光响应性能,获得了336 A/W的光响应值R.在此基础上,在DPP-DTT纳米网格上引入电子受体材料——氧化锌(ZnO)纳米颗粒,增加了激子的分离效率,进一步提高了近红外光响应晶体管的器件性能,使得最高光响应值R提高到721 A/W,达到甚至超过了传统无机近红外光响应晶体管的性能水平.