以净水厂污泥制备陶瓷膜支撑体及其性能研究
|
摘要
以转鼓脱水的净水厂污泥为研究对象,采用半干压法将其制备成陶瓷膜支撑体,并对其进行了结构与性能表征。结果表明,经过1 100℃保温3 h烧制后,支撑体孔隙率为61.0%,平均孔径为14.237μm,纯水通量为515.72 L/(m~2·h·k Pa),抗压强度为54.92 k N,维氏硬度为49.3 MPa;净水厂污泥中Si构成陶瓷膜支撑体的主体骨架。利用净水厂的废弃物制造机械强度高、孔隙率大的陶瓷膜支撑体,将兼获经济效益、社会效益和环境效益。
Using dehydrated sludge as a research object,the ceramic membrane support was prepared using the semi-dry pressing method,and the structure and performance of the support were characterized. The results showed that after calcination at 1 100 ℃ for 3 h,the porosity of the support was61. 0%,the average pore size was 14. 237 μm,the pure water flux was 515. 72 L/( m~2·h·k Pa),the compressive strength was 54. 92 k N,and the Vickers hardness was 49. 3 MPa. Silicon in the sludge of the waterworks formed the main skeleton of the ceramic membrane support. Producing high-strength ceramic membrane support from waterworks solid wastes has demonstrated economic,social and environmental benefits.
Using dehydrated sludge as a research object,the ceramic membrane support was prepared using the semi-dry pressing method,and the structure and performance of the support were characterized. The results showed that after calcination at 1 100 ℃ for 3 h,the porosity of the support was61. 0%,the average pore size was 14. 237 μm,the pure water flux was 515. 72 L/( m~2·h·k Pa),the compressive strength was 54. 92 k N,and the Vickers hardness was 49. 3 MPa. Silicon in the sludge of the waterworks formed the main skeleton of the ceramic membrane support. Producing high-strength ceramic membrane support from waterworks solid wastes has demonstrated economic,social and environmental benefits.
引文
[1]王圃,龙腾锐,李江涛,等.城市给水厂污泥处理与能耗[J].重庆建筑大学学报,2005,27(4):77-80.
[2]Keeley J,Smith A D,Judd S J,et al.Acidified and ultrafiltered recovered coagulants from water treatment works sludge for removal of phosphorus from wastewater[J].Water Res,2016,88:380-388.
[3]Lee L Y,Wang B B,Guo H L,et al.Aluminum-based water treatment residue reuse for phosphorus removal[J].Water,2015,7(4):1480-1496.
[4]Siswoyo E,Mihara Y,Tanaka S.Determination of key components and adsorption capacity of a low cost adsorbent based on sludge of drinking water treatment plant to adsorb cadmium ion in water[J].Appl Clay Sci,2014,97/98(8):146-152.
[5]He J,Wang Q S.Technology research on waterworks sludge for ceramsite[J].Adv Mater Res,2012,383/390:3352-3355.
[6]Medeiros E N M D,Sposto R M,Neves G D A,et al.Technical feasibility of the incorporation of rice husk ash,sludge from water treatment plant and wood ash in clay for ceramic coating[J].Revista Escola de Minas,2014,67(3):279-283.
[7]Zhou J E,Zhang X Z,Wang Y Q,et al.Electrokinetic characterization of the Al2O3ceramic MF membrane by streaming potential measurements[J].Desalination,2009,235(1):102-109.
[8]Masmoudi S,Larbot A,Feki H E,et al.Elaboration and characterisation of apatite based mineral supports for microfiltration and ultrafiltration membranes[J].Ceramics International,2007,33(3):337-344.
[9]Agyin-Birikorang S,O’Connor G A,Jacobs L W,et al.Long-term phosphorus immobilization by a drinking water treatment residual[J].J Environ Qual,2007,36(1):316-323.
[10]贺君,王启山,任爱玲.污水厂污泥制轻质陶粒研究现状及应用前景[J].城市环境与城市生态,2003,(6):13-14.
[11]Tu H Y,Takeda Y,Imanishi N,et al.Ln1-xSrxCo O3(Ln=Sm,Dy)for the electrode of solid oxide fuel cells[J].Solid State Ionics,1997,100(3):283-288.
[12]Ippolito J A,Scheckel K G,Barbarick K A.Selenium adsorption to aluminum-based water treatment residuals[J].J Colloid Interface Sci,2009,338(1):48-55.
[13]景亚妮,邓湘云,李建保,等.多孔碳化硅/莫来石复合陶瓷的制备及性能研究[J].中国陶瓷,2013,(12):14-18.
[2]Keeley J,Smith A D,Judd S J,et al.Acidified and ultrafiltered recovered coagulants from water treatment works sludge for removal of phosphorus from wastewater[J].Water Res,2016,88:380-388.
[3]Lee L Y,Wang B B,Guo H L,et al.Aluminum-based water treatment residue reuse for phosphorus removal[J].Water,2015,7(4):1480-1496.
[4]Siswoyo E,Mihara Y,Tanaka S.Determination of key components and adsorption capacity of a low cost adsorbent based on sludge of drinking water treatment plant to adsorb cadmium ion in water[J].Appl Clay Sci,2014,97/98(8):146-152.
[5]He J,Wang Q S.Technology research on waterworks sludge for ceramsite[J].Adv Mater Res,2012,383/390:3352-3355.
[6]Medeiros E N M D,Sposto R M,Neves G D A,et al.Technical feasibility of the incorporation of rice husk ash,sludge from water treatment plant and wood ash in clay for ceramic coating[J].Revista Escola de Minas,2014,67(3):279-283.
[7]Zhou J E,Zhang X Z,Wang Y Q,et al.Electrokinetic characterization of the Al2O3ceramic MF membrane by streaming potential measurements[J].Desalination,2009,235(1):102-109.
[8]Masmoudi S,Larbot A,Feki H E,et al.Elaboration and characterisation of apatite based mineral supports for microfiltration and ultrafiltration membranes[J].Ceramics International,2007,33(3):337-344.
[9]Agyin-Birikorang S,O’Connor G A,Jacobs L W,et al.Long-term phosphorus immobilization by a drinking water treatment residual[J].J Environ Qual,2007,36(1):316-323.
[10]贺君,王启山,任爱玲.污水厂污泥制轻质陶粒研究现状及应用前景[J].城市环境与城市生态,2003,(6):13-14.
[11]Tu H Y,Takeda Y,Imanishi N,et al.Ln1-xSrxCo O3(Ln=Sm,Dy)for the electrode of solid oxide fuel cells[J].Solid State Ionics,1997,100(3):283-288.
[12]Ippolito J A,Scheckel K G,Barbarick K A.Selenium adsorption to aluminum-based water treatment residuals[J].J Colloid Interface Sci,2009,338(1):48-55.
[13]景亚妮,邓湘云,李建保,等.多孔碳化硅/莫来石复合陶瓷的制备及性能研究[J].中国陶瓷,2013,(12):14-18.