Coagulation Of Wood Pollutants From Model Wastewater By Aluminium Salts
DOI:
https://doi.org/10.17770/etr2011vol1.886Keywords:
aluminium salts, coagulation, dose, hemicellulose, lignin, model wastewaterAbstract
One of the stages of raw material preparation for plywood producing is hydrothermal treatment of birch wood. Wastewater from plywood hydrothermal basin is characterized by the high degree of contamination. The basic contaminating component of this wastewater is lignin, hemicellulose and extractive substances (LES), which are the main reason of a high level of chemical oxygen demand (COD) and color of water. The main objective of the present study is to investigate the influence of aluminium sulfate, aluminium chloride and poly aluminium chloride dose on coagulation of LES from model wastewater. It was established that the influence of coagulant dose on LES removal can be described by 3 regions: first region - the process of coagulation does not take place; second region is characterized by the sharp increase of efficiency of LES removal and the third region corresponds to decrease of efficiency of LES removal at the increase of coagulant dose.Downloads
References
G. Shulga, J. Brovkina, T. Betkers, O. Aniskevicha, J. Ozoliņš. Relationship between composition of the lignin-based interpolymer complex and its structuring ability – Environmental Engineering and Management Journal, July/August 2008, Vol. 7. No.4. pp. 397-401.
G Shulga, V. Shakels, J. Brovkina, T. Betkers, J. Ozoliņš. Effect of rheological properties of the Lignin-based adhesive on aggregating of light-textured soil - Proceedings of 10th European Workshop on Lignocellulosics and Pulps, Stockholm, Sweden, August 26-29, 2008, pp. 356.
Mingquan Yan, Hailong Liu, Dongsheng Wang. Natural organic matter removal by coagulation: effect of kinetic and hydraulic power. Water Science and Technology: water supply, Vol. 9 (1), 2009, pp. 21-30.
J. Brovkina, G. Shulga, J. Ozolins. Recovery of lignin and extractive substances from the hydrolysate of model birch wood hydrolysis with aluminium salt. Chemine Technologija (Chemical Technology), Nr. 3-4 (56), 2010, p. 30-34.
Yu. M. Chernoberezhskii, D. Yu. Mineev, A. B. Dyagileva, A. V. Lorentsson and Yu. V. Belova. 2002. Recovery of Kraft Lignin from Aqueous Solutions with Oxotitanium Sulfate, Aluminum Sulfate, and Their Mixture. Russian Journal of Applied Chemistry, v. 75 (10), pp. 1730-1732.
C.Н. Линевич, С.В. Гетманцев. 2007. Коагуляционный метод водообработки, теоретичекие основы и практическое использование. Наука, Москва, 223 стр.
Barbara H. Wortley and Joe Steelhammer. (1990) Polyaluminum hydroxychloride application in neutral ph rosin sizing of paper. Mat. Res. Soc. Symp. Proc. v. 197, pp. 273-278.
