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  • Title: Ozonation of wastewater sludge for reduction and recycling.
    Author: Ahn KH, Park KY, Maeng SK, Hwang JH, Lee JW, Song KG, Choi S.
    Journal: Water Sci Technol; 2002; 46(10):71-7. PubMed ID: 12479455.
    Abstract:
    An ozone treatment system was introduced as an alternative method for municipal sludge treatment and disposal. A pilot-scale facility was built to investigate the feasibility of the ozonation for sludge reduction and recycle. The system consists of three main parts; advanced wastewater treatment, sludge ozone treatment and belt press dewatering. Ozonation of wastewater sludge resulted in mass reduction by mineralization as well as volume reduction by improvement of dewatering characteristics. The supernatant of the ozonated sludge, consisting of solubilized organics and micro-particles, proved to be an effective carbon source for denitrification. A simple economic assessment reveals that the ozonation process can be more economical than incineration for sludge treatment and disposal at small- and medium-sized wastewater treatment plants.
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