Characteristics of the Coagulate Obtained During the Process of Model Wastewater Treatment

Julija Brovkina, Galija Shulga, Jurijs Ozolins, Zilgma Irbe, Maris Turks, Vitalijs Rjabovs


In the process of wastewater treatment by coagulation a large amount of sediment is being produced, which is the main drawback of this method. Therefore, the development of utilization or recirculation technology of the waste obtained, the research of the obtained by-products should be conducted. Within the scope of this work, the sediment, that is being formed during the coagulation of the model wastewater containing the wood originated pollutants, was studied. Using the aluminium-containing composition coagulant on a base of polyaluminium chloride, coagulates characterized by the low sludge volume index within 30 minutes (89 ml g-1), and the optimal time of sedimentation is 20-30 minutes. The coagulate particles have an average size of 45.8 μm. The derived coagulate is composed primarily of carbon (27.9%), oxygen (49.4%) and aluminum (10.9%). Carbon, oxygen and hydrogen belong to an organic part of coagulate-the wood pollutants, which, in turn, has a high content of hemicellulose. It is concluded that the existing hemicellulose in the obtained coagulate is characterized by O-acetyl-4-O-methyl-D-glucuron-β-D-xylan with β-(1-4)-glucomannose.


coagulation; model wastewater; coagulate; hemicellulose; lignin-containing substances

Full Text:



G. Thompson, J. Swain, M. Kay, C.F. Forster, The treatment of pulp and paper mill effluent: a review", Bioresource Technol., vol. 77, no 3, pp. 275-286, 2001.

B.S.A. Murthy, T.A. Sihorwala, H.V. Tilwankar, D.J. Killedar, Removal of colour from pulp and paper mill effluents by sorption technique - a case study", Indian J. Environ. Prot., vol. 11, no 5, pp. 360-370, 1991.

Stephenson R.J., Duff S.J.B. Coagulation and precipitation of a mechanical pulping effluent-I. Removal of carbon, colour and turbidity. Water Res., 1996, Vol.30, pp. 781-792 M.H. Al-Malack, N.S. Abuzaid, A.H. El-Mubarak, Coagulation of polymeric wastewater discharged by a chemical factory", Water Res., vol. 33, pp. 521-529, 1999.

N.Z. Al-Mutairi, M.F. Hamoda, I. Al-Ghusain, Coagulant selection and sludge conditioning in a slaughterhouse wastewater treatment plant", Bioresource Technol., vol. 95, pp. 115-119, 2004.

W.S. Chen, F.C. Chang, Y.H. Shen, M.S. Tsai, The characteristics of organic sludge/sawdust derived fuel", Bioresource Technol., vol. 102, pp. 5406-5410, 2011.

Lakhdar, R. Scelza, R. Scotti, "The effect of compost and sewage sludge on soil biologic activities in salt affected soil", R.C. Suelo Nutr. Veg., vol. 10, no 1, pp. 40-47, 2010.

Lin, Deng-Fong, and Chih-Huang Weng. "Use of sewage sludge ash as brick material." Journal of Environmental Engineering 127.10 (2001): 922-927.

S. Rio, L. Le Coq, C. Faur, P. Le Cloirec, "Production of porous carbonaceous adsorbent from physical activation of sewage sludge: application to wastewater treatment", Water Sci. Technol., vol. 53, no 3, pp. 234-244, 2006.

M. Ahmaruzzaman, Industrial wastes as low-cost potential adsorbents for the treatment of wastewater laden with heavy metals" Advances in Colloid and Interface Science, vol. 166, pp. 36–59, 2011.

J. Brovkina, G. Shulga, J. Ozolins, "Recovery of lignin and extractive substances from the hydrolysate of model birch wood hydrolysis with aluminium salt", Chemical Technol., Vol. 3-4, no 56, pp. 30-34, 2010.

G. Shulga, S. Vitolina, J. Brovkina, B. Neiberte, A. Verovkins, M. Puķe, N. Vedernikovs, "Wood biomass from the model wastewater and its fractionation", Proceedings of the 8th International Scientific and Practical Conference Environment. Technology. Resources, Rezekne, Latvia, June 20-22, 2013.

G. Šuļga, J. Brovkina, B. Neiberte., J. Ozoliņš, R. Neilands, "Koksnes pārstrādes uzņēmumu notekūdeņu attīrīšanas paņēmiens no lignīna un hemicelulozes vielām" LV Patenta pieteikums P-12-115 (04.07.2012.). Pieteikuma publicēšana notiks saskaņā ar Patenta likuma 35. panta 1. daļu 20.01.2014.

X.F. Sun, Z. Jing, P. Fowler, Y. Wu, M. Rajaratnam, Structural characterization and isolation of lignin and hemicelluloses from barley straw", Ind. Crop. Prod., vol. 33, pp. 588-598, 2011.

T.Q. Yuan, S. Sun, F. Xu, R.C. Sun, "Isolation and physicochemical characterization of lignins from ultrasound irradiated fast-growing poplar wood", BioResources, vol. 6, no 1, pp. 414- 433, 2011.

C.A. Contreras, S. Sugita, E. Ramos, Preparation of sodium aluminate from basic aluminium sulphate", J. Mater. Online., vol. 2, 2006. [Online]. Available:

J. Bian, F. Peng, F. Xu, R.C. Sun, J.F. Kennedy, Fractional isolation and structural characterization of hemicelluloses from Caragana korshinskii", Carbohyd. Polym., vol. 80, pp. 753-760, 2010.

R.C. Sun, X.F. Sun, X.H. Ma, "Effect of ultrasound on the structural and physiochemical properties of organosolve soluble hemicelluloses from wheat straw", Ultrason. Sonochem., vol. 9, pp. 95-101, 2002.

T. Heinze, T. Liebert, A. Koschella Esterification of polysaccharides. Springer-Verlag Berlin Heidelberg, Berlin, 2006.

J.L. Ren, F. Peng, R.C. Sun, X.L. Zhang, "Preparation and characterization of carbamoylethyl hemicelluloses", e-Polymers, vol. 3, pp.1-11, 2009.



  • There are currently no refbacks.

SCImago Journal & Country Rank