Spinel-based ceramic membranes coupling solid sludge recycling with oily wastewater treatment

WATER RESEARCH

卷:169

Article

Chen, Mingliang^1,2  Zhu, Li³  Chen, Jingwen¹  Yang, Fenglin¹  Tang, Chuyang Y.⁴  Guiver, Michael D.^5,6  Dong, Yingchao¹ 

[1] Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn, Sch Environm Sci & Technol, Minist Educ,MOE, Dalian 116024, Peoples R China

[2] Delft Univ Technol, Fac Civil Engn & Geosci, Dept Sanit Engn, POB 5048, NL-2600 GA Delft, Netherlands

[3] Wuhan Inst Technol, Sch Mat Sci & Engn, Engn Res Ctr Environm Mat & Membrane Technol Hube, Wuhan, Peoples R China

[4] Univ Hong Kong, Dept Civil Engn, Pokfulam, Hong Kong, Peoples R China

[5] Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China

[6] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China

关键词: Wastewater sludge;    Ceramic membrane;    Oily wastewater;    High flux;    Membrane fouling;   

DOI  :  10.1016/j.watres.2019.115180

来源: Elsevier

【 摘 要 】

Highly efficient and economic treatment of wastewater sludges and wastewaters in one way is a challenging issue in the water treatment field. Herein we present a waste-to-resource strategy for rational fabrication of low-cost ceramic membranes, which simultaneously addresses the treatment of heavy metal-laden sludges and the separation of oil-in-water (O/W) emulsions. A thermal conversion mechanism is proposed for complicated reactions between simulated nickel-laden wastewater sludge and bauxite mineral. In addition to full stabilization and recycling of heavy metal wastewater sludges, rational tailoring of ceramic membrane structures can also be realized to achieve high water flux and favorable mechanical and surface properties. With rational structure design, the tailored spinel-based ceramic membranes exhibited high rejection and high flux (7473 LMH.bar(-1)) simultaneously for separation of oily wastewater, outperforming other reported state-of-the-art ceramic membranes. The membrane fouling mechanism revealed the dominance of cake layer formation at low cross flow velocities, while a combined model of cake layer formation and pore blocking dominated membrane fouling at high cross-flow velocities. The proposed strategy can be potentially extended toward design of functional ceramic membranes derived from other heavy metal wastewater sludges and for other water treatment applications. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

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