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Effective water content reduction in sewage wastewater sludge using magnetic nanoparticles
KTH, School of Biotechnology (BIO), Industrial Biotechnology.
KTH, School of Biotechnology (BIO), Industrial Biotechnology.
2014 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 153, 333-339 p.Article in journal (Refereed) Published
Abstract [en]

The present work compares the use of three flocculants for sedimentation of sludge and sludge water content from sewage wastewater i.e. magnetic iron oxide nanoparticles (MION), ferrous sulfate (chemical) and Moringa crude extract (protein). Sludge water content, wet/dry weight, turbidity and color were performed for, time kinetics and large-scale experiment. A 30% reduction of the sludge water content was observed when the wastewater was treated with either protein or chemical coagulant. The separation of sludge from wastewater treated with MION was achieved in less than 5. min using an external magnet, resulted in 95% reduction of sludge water content. Furthermore, MION formed denser flocs and more than 80% reduction of microbial content was observed in large volume experiments. The results revealed that MION is efficient in rapid separation of sludge with very low water content, and thus could be a suitable alternative for sludge sedimentation and dewatering in wastewater treatment processes.

Place, publisher, year, edition, pages
2014. Vol. 153, 333-339 p.
Keyword [en]
Chemical flocculent, Coagulant protein, Magnetic nanoparticles, Sewage wastewater, Sludge
National Category
Water Treatment
URN: urn:nbn:se:kth:diva-140807DOI: 10.1016/j.biortech.2013.12.003ISI: 000331461000045ScopusID: 2-s2.0-84891434484OAI: diva2:693235

QC 20140204

Available from: 2014-02-04 Created: 2014-01-31 Last updated: 2014-03-24Bibliographically approved

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Lakshmanan, RamnathKuttuva Rajarao, Gunaratna
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