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  • Title: The characteristics and application of sludge-fly ash ceramic particles (SFCP) as novel filter media.
    Author: Han S, Yue Q, Yue M, Gao B, Li Q, Yu H, Zhao Y, Qi Y.
    Journal: J Hazard Mater; 2009 Nov 15; 171(1-3):809-14. PubMed ID: 19608336.
    Abstract:
    Novel filter media-sludge-fly ash ceramic particles (SFCP) were prepared using dewatered sludge, fly ash and clay with a mass ratio of 1:1:1. Compared with commercial ceramic particles (CCP), SFCP had higher total porosity, larger total surface area and lower bulk and apparent density. Tests of heavy metal elements in lixivium proved that SFCP were safe for wastewater treatment. A lab-scale upflow anaerobic bioreactor was employed to ascertain the application of SFCP in denitrification process using acetate as carbon source. The results showed that SFCP reactor brought a relative superiority to CCP reactor in terms of total nitrogen (TN) removal at the optimum C/N ratio of 4.03 when volumetric loading rates (VLR) ranged from 0.33 to 3.69 kg TN (m(3)d)(-1). Therefore, SFCP application, as a novel process of treating wastes with wastes, provided a promising way in sludge and fly ash utilization.
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