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Development of Biomedia using Waste Sewage Sludge - Evaluation of Basic Properties and Determination of Optimum Mixing Ratio of Sludge and Loess -  

Jeong, Soo Il (Department of Civil Engneering, Pukyong National University)
Sohn, In Shik (Department of Civil Engneering, Pukyong National University)
Jeong, Seung Hyun (Department of Environmental Engneering, Kunsan National University)
Jeong, Byung Gon (Department of Environmental Engneering, Kunsan National University)
Publication Information
Journal of Korean Society on Water Environment / v.26, no.2, 2010 , pp. 225-230 More about this Journal
Abstract
Dumping of waste sludge to ocean will be prohibited in Jananuary, 2012. Thus, various methods of sludge recycling are intensively studied. To present new way of sewage sludge recycling method, feasibility of making porous biological support media was investigated. Porous biological support media was made of sludge cake from sewage treatment plant and loess. They were mixed in varying ratio and burnt in high temperature to ensure sufficient mechanical strength. It was evaluated that about 67% of sewage sludge were ignitible. The ignitible portion play an important role in making pore in biomedia during ignition process. It was evaluated that optimum mixing ratio of loess to sludge cake was 25% in respect of compressive strength. In results of observation using scanning electron microscope (SEM), inner structure of biomedia become simple when the contents of loess are increased.
Keywords
Biomedia; Compressive strength; Loess; Sewage sludge;
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