The Characteristics and Application of Water Quenched Slag Particles (WQSP) as Filter Media

Abstract:

Novel filter media-water quenched slag particles (WQSP) were prepared using waste material- Water quenched slag, clay and pore-forming material with a mass ratio of 3:2:1. Compared with haydite, WQSP had higher total porosity, larger total surface area and lower bulk and apparent density. Tests of heavy metal elements in lixivium proved that SGSP were safe for wastewater treatment. In order to ascertain the application of WQSP ，WQSP and haydite were applied as the media of biological aerated filters (BAF) to treat municipal wastewater in two lab scale upflow BAFs. The results showed that WQSP reactor brought a relative superiority to haydite reactor in terms of chemical oxygen demand (CODcr) and ammonia nitrogen (NH3-N) removal at the conditions of water temperature ranging from 200C to 260C and DO ≥4.00 mg·L-1. Therefore, WQSP application, as a novel process of treating wastes with wastes, provided a promising way in water quenched slag utilization.

• Periodical: Advanced Materials Research (Volumes 156-157)
• Pages: 1247-1250
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.156-157.1247
• Online since: October 2010
• Authors: Yan Feng, Yan Zhen Yu, Jian Wei Zhang, Tan Juan
• Keywords: Ammonia Nitrogen, Biological Aerated Filter (BAF), pH Value, Water Quenched Slag Particle

References

[1] F. Osorio, E. Hontoria. 2002. Wastewater treatment with a double-layer submerged biological aerated filter, using waste materials as biofilm support, J. Environ. Manage. 65: 79–84.

DOI: 10.1006/jema.2001.0530

[2] Xin Zhao, Yanming Wang, Zhengfang Ye, Alistair G.L. Borthwick, Jinren Ni. 2006. Oil field wastewater treatment in Biological Aerated Filter by immobilized microorganisms. Process Biochemistry. 41: 1475–1483.

DOI: 10.1016/j.procbio.2006.02.006

[3] State Environmental Protection Administration of China. 2002. Monitoring and Analysis Methods of Water and Wastewater (4th edition). Beijing: China Environmental Science Press.

[4] T.D. Kent, C.S.B. Fitzpatrick, S.C. Williams. 1996. Testing of biological aerated filter (BAF) media, Water Sci. Technol. 34: 363–370.

DOI: 10.2166/wst.1996.0452

[5] State Environmental Protection Administration of China. 2007. Identification standard for hazardous wastes-Identification for extraction procedure toxicity. Beijing: China Environmental Science Press.