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폐기물 소각 잔류물의 매립 : 새로운 접근 방법에 대해
( Thomas H. Christensen ),( Thomas Astrup ),( Zuansi Cai ),( Dezhen Chen ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.2
폐기물 소각시설로부터의 잔류물은 대표적으로 바닥재와 비산재를 포함한 대기오염방지시설에서 나오는 잔류물이다. 이러한 재로부터 상당량의 중금속과 염이 용출되며, 다양한 용출실험을 통하여 비산재 및 바닥재의 매립 규제를 위한 기준이 제안 되어왔다. 그러나 실제 처분하는 현장과 동일하게 정보를 제공 및 매립하기 전에 잔류물들의 전처리의 이익평가를 하기 위해서 용출실험은 주의 깊게 선택 되어야만 한다. 본 논문은 매립된 잔류물에서의 pH-변화 및 Cr 용출능에 대한 용출실험의 영향과 FeSO<sub>4</sub> 를 이용한 전처리의 효과를 서술하였다. Residues from waste incineration are bottom ashes and air-pollution-control (APC) residues including fly ashes. The leaching of heavy metals and salts from the ashes is substantial and a wide spectrum of leaching tests and corresponding criteria have been introduced to regulate the landfilling of the ashes. Leaching test, however, must be selected carefully to provide information relevant for the actual disposal scenario and for evaluating the benefits of pre-treating the residues prior to landfilling. This paper describes research at the Technical University of Denmark addressing some of these issues focusing on pH-development in landfilled residues, effects of leaching test conditions on Cr leaching and effects of pre-treatment with FeSO<sub>4</sub>.
LANDFILLING OF WASTE INCINERATION RESIDUES: TOWARDS NEW APPROACHES
( Thomas H. Christensen ),( Thomas Astrup ),( Zuansi Cai ),( Dezhen Chen ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.1
Residues from waste incineration are bottom ashes and air-pollution-control (APC) residues including fly ashes. The leaching of heavy metals and salts from the ashes is substantial and a wide spectrum of leaching tests and corresponding criteria have been introduced to regulate the landfilling of the ashes. Leaching test, however, must be selected carefully to provide information relevant for the actual disposal scenario and for evaluating the benefits of pre-treating the residues prior to landfilling. This paper describes research at the Technical University of Denmark addressing some of these issues focusing on pH-development in landfilled residues, effects of leaching test conditions on Cr leaching and effects of pre-treatment with FeSO<sub>4</sub>.
NOx removal by non-thermal plasma at low temperatures with amino groups additives
Zhenzhen Guan,Jian-Xing Ren,Dezhen Chen,Liu Hong,Fangqin Li,Du Wang,Yuanhuang Ouyang,Yang Gao 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.11
NOx removal from flue gas using direct current (DC) narrow pulsed discharge-induced non-thermal plasma (NTP) was experimentally investigated. Factors such as additives, NOx initial concentrations, residence time, reaction temperatures inside the NTP reactor, and so on were investigated to evaluate their effects on NOx removal efficiencies. The focus was on the effects of additives containing amino groups. The results showed that H2O addition enhanced NOx removal, NH3 could further increase the NOx removal efficiencies under the same conditions without an obvious NH3 slip, and N2H4 was the most effective additive by reducing NOx to N2. X-Ray diffraction (XRD) analysis of the products collected from the NTP reactor demonstrated that NOx removal inside the NTP reactor was mainly based on NOx oxidation when ammonia or H2O was used as an additive, while NOx removal was mainly based on NOx reduction with the N2H4 additive.