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Performance of Slag Ceramics for the Treatment of Micro-Aerobic Effluent in Contact Oxidation Reactor


Affiliations
1 College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063009, P. R., China
 

Slag ceramics, which were made from steel slag as well as a small percentage of clay and pore forming materials, were applied to a biological contact oxidation reactor for the treatment of microaerobic effluent. The experiment results showed that slag ceramics exhibited some favourable characteristics for removing pollution, such as lighter mass, larger specific surface area and easier biofilm-attachment compared with steel slag. In addition, a contact oxidation process filled with slag ceramics was multifunctional in pollutant removal, namely, COD, nitrogen and phosphorus were simultaneously removed. Under the hydraulic retention time (HRT) of 2.5 h, the removal efficiencies of NH3-N, TN, COD and TP were 99%, 84%, 63% and 82%, respectively, and the effluent concentrations ranged in 12˜27 mg/L, 0.1˜1.0 mg/L, 0~0.6 mg/L and 1.0˜6.8 mg/L, respectively. Mineralogical and chemical investigations revealed that the mechanisms for P removal by slag-ceramics filler, were the combination of adsorption and Ca phosphate precipitation. Therefore, the mechanisms of pollutant removal through the contact oxidation reactor filled with slag ceramics were complicated, including adsorption, precipitation, bio-oxidation and bio-reduction, etc. Meanwhile, phosphate saturation should be considered for the long-term operation.

Keywords

Steel Slag Ceramics, Boifilm, Contact Oxidation, Nitrogen, Phosphorus.
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  • Barca, C., Gerente, C., Meyer, D., Chazarenc, F. and Andrès, Y. 2012. Phosphate removal from synthetic and real wastewater using steel slags produced in Europe. Water Res., 46: 2376-2384.

  • Barca, C., Troesch, S., Meyer, D., Drissen, P., Andrès, Y. and F. Chazarenc. 2013. Steel slag filters to upgrade phosphorus removal in constructed wetlands: two years of field experiments. Enxiron. Sci. and Technol., 47: 549-556.

  • Bowden, L.I., Jarvis, A.P., Younger, P.L. and Johnson K.L. 2009. Phosphorus removal from waste waters using basic oxygen steel slag. Environ. Sci. and Technol., 43: 2476-2481.

  • Chazarenc, F., Brisson, J. and Comeau, Y. 2007. Slag columns for upgrading phosphorus removal from constructed wetland effluents. Water Sci. Technol., 56: 109-115.

  • Chinese NEPA 2006. Water and Wastewater Monitoring Methods. 4th Ed., Chinese Environmental Science Publishing House, Beijing, 211, 279, 255, 246.

  • Chu, L. B., Zhang, X. W., Yang, F. L. and Li, X. H. 2006. Treatment of domestic wastewater by using a microaerobic membrane bioreactor. Desalination, 189: 181-192.

  • Cucarella, V., Zaleski, T., Mazurek, R. and Renman, G. 2008. Effect of reactive substrates used for the removal of phosphorus from wastewater on the fertility of acid soils. Bioresour. Technol., 99: 4308-4314.

  • Dominique, C.M., Scott, W. and Yves, C. 2013. Removal of phosphorus, fluoride and metals from a gypsum mining leachate using steel slag filters. Water Res., 47: 1512-1520.

  • Drizo, A., Comeau, Y., Forget, C. and Chapuis, R. P. 2002. Phosphorus saturation potential: A parameter for estimating the longevity of constructed wetland systems. Environ. Sci. Technol, 36: 4642-4648.

  • Drizo, A., Forget, C., Chapuis, R.P. and Comeau, Y. 2006. Phosphorus removal by electric arc furnace steel slag and serpentinite. Water Res., 40: 1547-1554.

  • Korkusuz, E.A., Beklioðlu M. and Demirer G. N. 2007. Use of blast furnace granulated slag as a substrate in vertical flow reed beds: field application. Bioresour. Technol., 98: 2089-2101.

  • Li, M., Zhou, Q.H., Tao, M., Wang, Y., Jiang, L.J. and Wu, Z.B. 2010. Comparative study of microbial community structure in different filter media of constructed wetland. J. Environ. Sci., 22: 127-133.

  • Liu, X. and Dong, C.J. 2011. Simultaneous COD and nitrogen removal in a micro-aerobic granular sludge reactor for domestic wastewater treatment. Systems Engineering Procedia, 1: 99-105.

  • Pratt, C., Shilton, A., Pratt, S., Haverkamp, R.G. and Elmetri, I. 2007a. Effects of redox potential and pH changes on phosphorus retention by melter slag filters treating wastewater. Environ. Sci. and Technol., 41: 6585-6590.

  • Pratt, C., Shilton, A.N., Pratt, S., Richard, G., Haverkamp, P. and Bolan, N.S. 2007b. Phosphorus removal mechanisms in active slag filters treating waste stabilisation pond effluent. Environ. Sci. and Technol., 41: 3296-3301.

  • Pratt, C., Shilton, A., Haverkamp, R.G. and Pratt, S. 2009. Assessment of physical techniques to regenerate active slag filters removing phosphorus from wastewater. Water Res., 43: 277-282.

  • Shiltona, A.N., Elmetri, I., Drizo, A., Pratt, S., Haverkamp, R.G. and Bilby, S.C. 2006. Phosphorus removal by an ‘active’ slag filter–a decade of full scale experience. Water Res., 40: 113-118.

  • U.S. Department of the Interior, U.S. Geological Survey. 2013. Mineral Commodity Summaries. USGS. http://minerals.usgs.gov/ minerals/pubs/mcs/2013/mcs2013.pdf.

  • Vohla, C., Koiv, M., Bavor, H.J., Chazarenc, F. and Mander, U. 2011. Filter materials for phosphorus removal from wastewater in treatment wetlands-a review. Ecological Engineering, 37: 70-89.

  • Xiong, J., Guo, G., Mahmood, Q. and Yue, M. 2011. Nitrogen removal from secondary effluent by using integrated constructed wetland system. Ecological Engineering, 37: 659-662.

  • Yaghi, N. and Hartikainen, H. 2013. Enhancement of phosphorus sorption onto light expanded clay aggregates by means of aluminum and iron oxide coatings. Chemosphere, 93: 1879-1886.

  • Zhang, Y., Dou, X.M., Yang, M., He, H., Y.B. Yu and He, S.L. 2006. Adsorption mechanism of arsenic onmetal oxide adsorbent. Characterization and the role of metal surface hydroxyl groups. Acta Scientiae Circumstantiae, 26: 1586-1591.


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  • Performance of Slag Ceramics for the Treatment of Micro-Aerobic Effluent in Contact Oxidation Reactor

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Authors

Xiao Liu
College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063009, P. R., China
Hao Wang
College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063009, P. R., China
Huiyuan Zhong
College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063009, P. R., China
Yanhua Chen
College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan, 063009, P. R., China

Abstract


Slag ceramics, which were made from steel slag as well as a small percentage of clay and pore forming materials, were applied to a biological contact oxidation reactor for the treatment of microaerobic effluent. The experiment results showed that slag ceramics exhibited some favourable characteristics for removing pollution, such as lighter mass, larger specific surface area and easier biofilm-attachment compared with steel slag. In addition, a contact oxidation process filled with slag ceramics was multifunctional in pollutant removal, namely, COD, nitrogen and phosphorus were simultaneously removed. Under the hydraulic retention time (HRT) of 2.5 h, the removal efficiencies of NH3-N, TN, COD and TP were 99%, 84%, 63% and 82%, respectively, and the effluent concentrations ranged in 12˜27 mg/L, 0.1˜1.0 mg/L, 0~0.6 mg/L and 1.0˜6.8 mg/L, respectively. Mineralogical and chemical investigations revealed that the mechanisms for P removal by slag-ceramics filler, were the combination of adsorption and Ca phosphate precipitation. Therefore, the mechanisms of pollutant removal through the contact oxidation reactor filled with slag ceramics were complicated, including adsorption, precipitation, bio-oxidation and bio-reduction, etc. Meanwhile, phosphate saturation should be considered for the long-term operation.

Keywords


Steel Slag Ceramics, Boifilm, Contact Oxidation, Nitrogen, Phosphorus.

References