Improvement of wastewater treatment by use of natural coagulants

Jelena Prodanović, Marina Šćiban, Mirjana Antov


An activated sludge and other organic sludges from wastewater treatment processes are usually anaerobically digested prior to application on land. The purpose of digestion is to convert bulky, odorous sludges to relatively inert material that can be rapidly dewatering. The important benefit of this process is a biogas production, too. It is proper to enlarge primary sludge production in a primary settler by adding some coagulation aids, with aim to increase a biogas production, as much as possible. The most common coagulant is alum, but presence of large quantities of aluminum salts in sludge has a harmful impact on digestion and digested sludge application. Some natural coagulants, that have a numerous advantages, can be used instead of alum. Natural coagulants could be extracted from a different plant material, and considering the fact that they are of organic nature, the biogas yield can be enhanced by their presence. A plant material that remains after extraction can be used as a feed. The aim of this paper is a consideration of potential environmental benefits of substitution of alum by natural coagulant extracted from common bean seeds in sewage wastewater treatment process.


alum, natural coagulants, sludge, wastewater

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Becker M. and Asch F. (2005). Iron toxicity 1. in rice – conditions and management concepts. Journal of Plant Nutrition and Soil Science, 168, 558-573.

Bhuptawat H., Folkard G.K. and Chaudhari S. (2007). Innovative physico-chemical treatment of wastewater incorporating Moringa oleifera seed coagulant. Journal of Hazardous Materials 142, 477-482.

EU Directive 91/27/EEC concerning Urban Waste Water Treatment.

Gaćeša S. and Klašnja M. (1994). Tehnologija vode i otpadnih voda (Water and wastewater technology). Yugoslav Association Brewery. Belgrade, Serbia.

Ghebremichael K.A. and Hultman B. (2004). Alum sludge dewatering using Moringa oleifera as a conditioner. Water, Air and Soil Pollution 158, 153-167.

Hammer N.J. and Hammer M.J., Jr. (2004). Water and wastewater technology. 5th Edition, Pearson Prentice Hall, Upper Saddle River. New Jersey, USA.

Hicks T.G. (Editor) (2000). Handbook of civil engineering calculations. McGraw-Hill. New York, USA. (accesed 8 July 2011)

Katayon S., Megat Mohd Noor M.J., Kien Tat W., Abdul Halim G., Thamer A.M. and Badronisa Y. (2007). Effect of natural coagulant application on microfiltration performance in treatment of secondary oxidation pond effluent. Desalination 204, 204-212.

Krstić A. (2009). Primena prirodnih koagulanata u postupku prečišćavanja otpadnihvoda od proizvodnje bioetanola na ekstrakcionom soku (Natural coagulans application in the treatment of wastewater from bioethanol production on extraction juice). Diploma work, Faculty of Technology. Novi Sad, Serbia.

Municipal wastewater treatment plant energy baseline study (2003). PG&E New construction energy management program, M/J Industrial Solutions. San Francisco, USA.

Musikavong C., Wattanachira S., Marhaba T.F. and Pavasant P. (2005). Reduction of organic matter and trihalomethane formation potential in reclaimed water from treated industrial estate wastewater by coagulation. Journal of Hazardous Materials B127, 58-67.

Nayak P. (2002). Aluminium: Impacts and Disease. 13. Environmental Research Section A 89, 101-115.

Pritchard M., Craven T., Mkandawire T., Edmondson A.S. and O’Neill J.G. (2010). A comparison between Moringa oleifera and chemical coagulants in the purification of drinking water – An alternative sustainable solution for developing countries. Physics and Chemistry of the Earth 35, 798-805.

Prodanović J., Šćiban M., Antov M. and Dodić J. (2011). The use of common bean extracted natural coagulants for treatment of distillery wastewaters. Roumanian Biotechnological Letters (in press).

Rout G.R., Samantaray S. and Das P. (2001). Aluminium toxicity in plants: a review. Agronomie 21, 3-21.

Sanghi R., Bhatttacharya B. and Singh V. (2002). Cassia angustifolia seed gum as an effective natural coagulant for decolourisation of dye solutions. Green Chemistry 4, 252-254.

Šćiban M., Vasić M., Prodanović J., Antov M. and Klašnja M. (2010). The investigation of coagulation activity of natural coagulants extracted from different strains of common bean. Acta Periodica Technologica 41, 141-147.

Yin C.-Y. (2010). Emerging usage of plant-based coagulants for water and wastewater treatment. Process Biochemistry 45, 1437-1444.

Younis S.S., Al Mansi N.M. and Fouad S.H. (1998). Chemically assisted primary treatment of municipal wastewater. Environmental Management and Health 9, 209-214.



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