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The Application of Cluster-Surfactant Flocculants in the Advanced Treatment of Coking Industrial Wastewater
1. College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081,China 2. Hubei Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan 430081,China
3. The Lingxiang Iron Ore Plant of Wuhan Iron and Steel (Group) Corp, Daye 435121, China
4. The Coking Plant of Wuhan Iron and Steel (Group) Corp, Wuhan 430083, China
Abstract: Coking wastewater from the process of coking, coal gas purification and the coking products refine, whose ingredients are complicated and inconstant, is hard to meet the standard of reclaimed water used for industrial water by secondary treatment. In view of this situation, the advanced treatment technique of coking wastewater was desired. The innovatory flocculation treatment was used to regenerate coking wastewater with the help of surfactant (the number of the Chinese patent is: CN200910063253.2). The synergistic effects of the surfactant (named K) could improve the traditional flocculation treatment process. The results showed that in the combination of IPF(Inorganic polymer flocculants)+OPF(Organic polymer flocculants) + Surfactant(K), surfactant (K) can incur obvious synergistic effects within the flocculants system. The COD and chromaticity less than 50mg/l and 30° respectively under the optimum condition, the water quality of the treatment of coking industrial wastewater can meet the water quality standard for industrial uses. So this synergistic treatment technology by fine chemicals and flocculants can be effective for industrial wastewater regeneration.
COD and chromaticity greatly, through synergistic test
and single factors correcting test we can draw that the
best condition of sample 1 was: the dosage of PFS was
1500mg/L, the dosage of PAM was 2.5mg/L ,the dosage
of Surfactant(K) was 25 mg/L and pH=8. Under this
condition, the removal rate of COD and chromaticity
improved 9% and 14% respectively when compared with
the traditional flocculation process, the synergistic effects
was obviously because Surfactant (K) changed the
physical properties of the solution.
(3) Cluster-surfactant flocculants make the COD and
chromaticity of coking industrial wastewater less than 50
mg/L and 30°respectively that meet the water quality
standard of reclaimed water. Therefore, the synergistic
treatment technology by fine chemicals and flocculants
can be effective for industrial wastewater recycling.
References [1] J.L. Wang, X.C. Quan, L.B. Wu, Y. Qian, H. Werner,
Bioaugmentation as a tool to enhance the removal of refractory compound in coke plant wastewater, Process Biochem. 38 (2002) 777–781
[2] B.R. Lim, H.Y. Hu, K. Fujie, Biological degradation and chemical oxidation characteristics of coke-oven wastewater, Water Air Soil Pollut. 146 (2003) 23–33.
[3] Y. Qian, Y.Wen, H. Zhang, Efficiency of pre-treatment methods in the activated sludge removal of refractory compounds in coke-plant wastewater,Water Res.28 (1994) 701–710
[4] M. Zhang, J.H. Tay, Y. Qian, X.S. Gu, Coke plant wastewater treatment by fixed biofilm system for COD and NH3-N removal,Water Res. 32 (2) (1998) 519–527
[5] P. Lai, H.Z. Zhao, M. Zeng, J.R. Ni, Study on treatment of coking wastewater by biofilm reactors combined with zero-valent iron process, J. Hazard. Mater. 162(2009) 1423–1429
[6] Y.M. Li, G.W. Gu, J.F. Zhao, H.Q. Yu, Anoxic degradation of nitrogenous heterocyclic compounds by acclimated activated
sludge, Process Biochem. 37 (2001)81–86. [7] S.H. Hosseini, S.M. Borghei, The treatment of phenolic
wastewater using a moving bed bio-reactor, Process Biochem. 40 (2005) 1027–1031
[8] H.Q. Yu, G.W. Gu, L.P. Song, Posttreatment of effluent from coke-plant wastewater treatment system in sequencing batch reactors, J. Environ. Eng. 123 (3) (1997) 305–308.
[9] H.Q. Yu, G.W. Gu, L.P. Song, The effect of fill mode on the performance of sequencing-batch reactors treating various wastewaters, Bioresour. Technol. 58 (1996) 46–55.
[10] M.W. Lee, J.M. Park, Biological nitrogen removal from coke plant wastewater with external carbon addition,Water Environ. Res. 70 (5) (1998) 1090–1095.
[11] M.T. Suidan, C.E. Strubler, S.W. Kao, J.T. Preffer, Treatment of coal gasification wastewater with anaerobic filter technology, J.Water Pollut. Control Fed. 55 (10) (1983) 1263–1270
[12] J.X. Liu, W.G. Li, X.H. Wang, H.Y. Liu, B.Z. Wang, Removal of nitrogen coal gasification wastewater by nitrosofication and denitrosofication,Water Sci. Technol. 38 (1) (1998) 39–46.
[13] P. Ning, H.J. Bart, Y.J. Jiang, A. de Haan, C. Tien, Treatment of organic pollutants in coke plant wastewater by the method of ultrasonic irradiation, catalytic oxidation and activated sludge, Sep. Purif. Technol. 41 (2005) 133–139.
[14] H.W. Lee, K.J. Kim, A.G. Fane, Removal of phenol by adsorption on powdered activated carbon in a continuous flow stirred cell membrane system, Sci. Technol. 32 (11) (1997) 1835–1849
[15] P.J. Chen, K.G. Linden, D.E. Hinton, S. Kashiwada, E.J. Rosenfeldt and S.W. Kullman, Biological assessment of bisphenol A degradation in water following direct photolysis and UV advanced oxidation, Chemosphere 65 (2006), pp. 1094–1102
[16] Edzwald JK. Coagulation in drinking water treatment:particles, organic and coagulants. Water Sci Technol 1993;27(11):21–35
[17] A. Leprince, F. Flessinger, J.Y. Bottero, Polymerised iron chloride: an improved inorganic coagulant, J. Am.WaterWorks Assoc. 76 (1984) 93–97.
[18] J.-Q. Jiang, N.J.D. Graham, Preparation and characterisation of an optimal polyferric sulphate (PFS) as a coagulant for water treatment, J. Chem. Technol. Biotechnol. 73 (1998) 351–358.
[19] W.P. Cheng, Comparison of hydrolysis/coagulation behaviour of polymeric and monomeric iron coagulants in humic acid solution, Chemosphere 47 (2002)963–969.
[20] Y.B. Zeng, C.Z. Yang, J.D. Zhang,W.H. Pu, Feasibility investigation of oily wastewater treatment by combination of zinc and PAM in coagulation/flocculation, J.Hazard. Mater. 147 (2007) 991–996.
[21] J.W. Qian, X.J. Xiang, W.Y. Yang, M. Wang, B.Q. Zheng, Flocculation performance of different polyacrylamide and the relation between optimal dose and critical concentration, Eur. Polym. J. 40 (2004) 1699–1704