Multifunctional sugar-cube-like Fe3O4@Cu/PVA biomaterials for enhanced removal of nitrate and Mn(II) from moving bed biofilm reactor (MBBR)

• Published in: Water science & technology. Water supply Vol. 19; no. 6; pp. 1643 - 1652
• Main Authors: Su, Jun Feng, Gao, Yi chou, Liang, Dong hui, Wei, Li, Bai, Xue chen, Zhu, Hai rong
• Format: Journal Article
• Language: English
• Published: London IWA Publishing 01.09.2019
• Subjects: Bacteria; Biodegradation; Biofilms; Biomaterials; Biomedical materials; Bioreactors; Carbon; Chemical engineering; Community composition; Copper; Cytology; Denitrification; Electron microscopy; Feasibility studies; Hydraulic retention time; Iron oxides; Manganese; Morphology; Moving beds; Nanoparticles; Nitrate removal; Nitrates; Nitrogen; Nitrous oxide; Nutrient removal; Oxidation; Phosphorus removal; Polyvinyl alcohol; Reactors; Removal; Retention time; Saccharides; Scanning electron microscopy; Species diversity; Sugar; United States > US; Japan
• ISSN: 1606-9749; 1607-0798
• DOI: 10.2166/ws.2019.038

Abstract A novel Fe3O4@Cu/PVA biomaterial as a new adsorbent and bacterial cell immobilized carrier was synthesized in this work. The structure and morphology were characterized by scanning electron microscopy (SEM). Effects of factors on Mn(II)-based autotrophic denitrification were investigated in a moving bed biofilm reactor (MBBR). The results indicate that the highest nitrate removal and Mn(II) oxidation efficiency occurred under the conditions of initial Mn(II) concentration of 80 mg·L−1, hydraulic retention time (HRT) of 10 h and pH 7. Meteorological chromatography analysis showed that N2 was produced as an end-product, and that gas compositions were different depending on the concentration of Mn(II) in the MBBR. The community diversity in the MBBR was markedly influenced by the concentration of Mn(II) and Pseudomonas sp. H-117 played a primary role in the process of nitrate removal and Mn(II) oxidation.