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http://dx.doi.org/10.17137/Korrae.2013.21.1.69

Feasibility of Powdered MSWI Ash Melted Slag as a Seed Crystal of crystallization reaction for the Removal of Phosphorus from Sewage  

Kim, Choong Gon (DOHWA Engineering Co., Ltd.)
Shin, Hyun Gon (Dept. of Urban Environmental Management, ShinHeung College University)
Kim, Seung Won (Korea Environmental Industry &Technology Institute)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.21, no.1, 2013 , pp. 69-75 More about this Journal
Abstract
This study is a fundamental research to test the applicability of powdered MSWI(Municipal Solid Waste Incinerator) ash melted slag as a seed Crystal for crystallization reaction. Powdered ash melted slag was melted at $1100^{\circ}C$ and ground to lesser than 0.35mm. According to the result of the tests, calcium, enough for crystallization reaction, was eluted from powdered ash melted slag. Moreover, sample(Phosphorus concentration is under 10 mg/L), more than 90% of Phosphorus can be removed. So we rectify the Phosphorus concentration to 100 mg/L. Alkalinity, being well known that it interferes crystallization reaction, effect was studied for synthetic solution(100 mg/L initial Phosphorus concentration, 50 mg/L calcium, pH 8, 1% powdered ash melted slag dosage). For this result, we know that Phosphorus removal is hindered by alkalinity. In addition, the effect of reaction temperature was performed at the same method. The reaction velocity was increased through raising the reaction temperature.
Keywords
MSWI(Municipal Solid Waste Incinerator); powdered ash melted slag; crystallization reaction; seed Crystal; Phosphorus removal;
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