Advanced wastewater treatment with autoclaved aerated concrete particles in biological aerated filters. (February 2016)

• Record Type: Journal Article
• Authors: Bao, Teng; Chen, Tianhu; Wille, Marie-Luise; Chen, Dong; Bian, Jia; Qing, Chengsong; Wu, Wentao; Frost, Ray L.
• Is Part Of: Journal of water process engineering. Volume 9(2016)
• Page Start: 188
• Page End: 194
• Publication Date: 2016-02
• Subjects: Autoclaved aerated concrete particle -- Porosity -- Simultaneous removal of nitrogen and phosphorus -- Biological aerated filter -- Simultaneous nitrification–denitrification; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2015.11.006
• Languages: English
• ISSNs: 2214-7144

Abstract

Abstract: Autoclaved aerated concrete particles (AACP) were tested as biofilter carriers in biological aerated filters (BAF) to solve the disposal problems of construction wastes. AACP were characterized using X-ray diffraction, X-ray fluorescence, scanning electron microscopy, and porosimetry analysis. Results showed that the main crystalline phases of SiO2, Ca5 Si6 O18 H2, CaO, and Al2 O3 were the major oxides and hydrous silicates in AACP. In addition, AACP had a high total porosity of 89.21% and a high specific surface area of 81 m 2 /g. Different from commercially available ceramsite (CAC), AACP had an open macroporous structure that was suitable for immobilizing microorganisms. AACP and CAC were loaded into two identical BAFs to compare the efficiency of their microbial treatment of wastewater. AACP BAF was more efficient than CAC BAF in terms of TOC, NH3 -N, TN, and PO4 3− removal. Therefore, AACP, as a novel product of recycling construction waste, provide a promising way to utilize construction waste.