Co-gasification of wastewater sludge and different feedstock: Feasibility study

被引:44
作者
Akkache, Salah [1 ]
Hernandez, Ana-Belen [2 ]
Teixeira, Gabriel [3 ]
Gelix, Franck [3 ]
Roche, Nicolas [1 ]
Ferrasse, Jean Henry [1 ]
机构
[1] Aix Marseille Univ, CNRS, UMR7340, M2P2, Europole Arbois Batiment Laennec,Hall C, F-13454 Aix En Provence, France
[2] Univ Johannesburg, Dept Civil Engn Sci, Kingsway Campus,POB 524,Auckland Pk, ZA-2006 Johannesburg, South Africa
[3] Veolia Rech & Innovat, F-78520 Limay, France
关键词
Co-gasification; Wastewater sludge; Waste-to energy; Pollutants release; Ash slagging and fouling; FLUIDIZED-BED GASIFICATION; SEWAGE-SLUDGE; STEAM GASIFICATION; BIOMASS FUELS; GAS QUALITY; ASH; COGASIFICATION; AGGLOMERATION; BEHAVIOR; WOOD;
D O I
10.1016/j.biombioe.2016.03.003
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Gasification experiments were performed for several feedstocks alone (wastewater sludge, waste wood, reeds, olive pomace, solid recovered fuel, paper labels and plastic labels) using a fixed bed reactor operating in semi-batch conditions. In order to combine them in an optimal gasifying blend, the gasification behavior of each feedstock was compared with that of wastewater sludge through the following criteria: the raw feedstock proximate and ultimate composition, the solid conversion, the gas heating value, the pollutants release and the ashes melting. Operated alone, the conversion rate of the feedstocks after 58 min of solid residence time was over 77% of initial mass. The Syngas low heating value produced at 1123 K was in the range of 9.0 to 11.9 MJ m(-3). The major concerns regarding the wastewater sludge were the pollutants precursors' release (NH3, COS...) and the ash slagging and fouling. The calculated slagging and fouling indexes were high also for olive pomace and for waste wood. Finally, among the possible blends studied the paper labels and plastic labels can be co-gasified with secondary and digested wastewater sludge without any restriction, reeds and solid recovered fuel can be blinded with secondary wastewater sludge without any restriction, a specific attention have to be taken to fouling when they are blended with digested wastewater sludge. The blend based on waste wood and olives pomace should be avoided for instance due to their ash slagging and fouling tendency. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:201 / 209
页数:9
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