title: Performance of diatomite/iron oxide modified nonwoven membrane used in membrane bioreactor process for wastewater reclamation.
abstract: This study describes an approach for surface modification of a nonwoven membrane by diatomite/iron oxide to examine its filterability. Analysis results showed that nonwoven hydrophilicity is enhanced. Static contact angle decreases dramatically from 122.66° to 39.33°. Scanning electron micrograph images show that diatomite/iron oxide is attached on nonwoven fiber. X-ray diffraction analysis further proves that the compound is mostly magnetite. Fourier transformed infrared spectra results reveal that two new absorption peaks might be attributed to Si-O and Fe-O, respectively. Modified and original membranes were used in double nonwoven membrane bioreactors (MBRs) for synthetic wastewater treatment. High critical flux, long filtration time, slow trans-membrane pressure rise and stable sludge volume index confirmed the advantages of modified nonwoven. Comparing with original nonwoven, similar effluent qualities are achieved, meeting the requirements for wastewater reclamation.
authors.affiliation: College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China E-mail: zhangwenqi_hit@163.com.
authors.forename: Yueling
authors.initials: Y
authors.lastname: He
authors.affiliation: College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China E-mail: zhangwenqi_hit@163.com.
authors.forename: Wenqi
authors.initials: W
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China E-mail: zhangwenqi_hit@163.com.
authors.forename: Pinhua
authors.initials: P
authors.lastname: Rao
authors.affiliation: China Northeast Architectural Design and Research Institute, CORP. LTD, Shenyang 110006, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Jin
mesh_terms: D019149:Bioreactors; D007692:Diatomaceous Earth / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D007692:Diatomaceous Earth; D005290:Ferric Compounds; D008567:Membranes, Artificial; D062065:Wastewater; D014874:Water Pollutants, Chemical; C000499:ferric oxide; C033787:diatomite