Effects of carbonization and solvent-extraction on change in fuel characteristics of sewage sludge

Park, Sangwoo; CheolHyeon, Jang

doi:10.1016/j.biortech.2011.05.072

Cited by 13 publications

(4 citation statements)

References 22 publications

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“…However, our sample is even poorer T A B L E 1 Analysis results all of these samples with a FC content of 1.4%. Besides, the VM content (51.3%) is almost comparable with the average VM content of 50.1% for 16 samples given in literature that have VM contents in the range of 42.5-65.3% 20,21,25,[27][28][29][31][32][33][34][35][41][42][43][44][45]. Furthermore, the proximate analysis results of SS used in this study are highly comparable with those of SS used by Folgueras et al28…”

supporting

confidence: 87%

Co‐combustion of lignite with sewage sludge and refuse‐derived fuel

Ozfidan

Haykırı-Açma

Yaman

2019

Env Prog and Sustain Energy

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Burning behavior of fuel blends consisted of lignite samples and waste biomass species such as sewage sludge (SS) and refuse‐derived fuel (RDF) was studied. The blends where the wastes account for 5, 10, and 15 wt% were burned in a thermal analyzer up to 900°C. The nonisothermal burning kinetics were established using Borchardt and Daniels method that bases on the data obtained from differential scanning calorimetry. The maximum rate of combustion (Rmax), the peak temperature (TR‐max), the ignition temperature (Tign), and the burnout temperature (Tb) that predicts the thermal reactivity were considered to evaluate the effects of RDF and SS on the burning characteristics of the lignite samples. It was determined that the combinations of the additive behavior and the synergistic interactions govern the burning characteristics of the fuel blends. The thermal reactivity of the samples can be arranged in the order of RDF > lignite > SS. On the other hand, blending of RDF or SS with the lignite samples did not led to any significant segregation in the heat flow characteristics, and can be concluded that these wastes can be safely burned with lignite.

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supporting

confidence: 87%

Co‐combustion of lignite with sewage sludge and refuse‐derived fuel

Ozfidan

Haykırı-Açma

Yaman

2019

Env Prog and Sustain Energy

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“…Sewage sludge including dangerous substances is generally treated through landfills, fertilizer, ocean dumping, and incineration. However, sewage sludge is difficult to handle due to environmental and health issues, and the major disposal method of ocean dumping was banned by international conventions. − Thus, there have been a number of publications reporting on utilization of sewage sludge as a fuel for coal-fired power plants and gasification-based facilities. − Sewage sludge as a fuel is usually blended with coal or other fuels to prepare sewage sludge and coal slurry (PBS fuel), sewage sludge and meat and bone meal (PBM fuel), sewage sludge with sawdust (PBT fuel), and refuse-derived fuels (RDFs) with a high calorific value , which is co-combusted in a boiler or gasifier to compensate its low calorific value. Such co-combustion of sewage sludge and other fuels results in the reduction of CO 2 emission because the sewage sludge originates from biomass, and we can readily comply with the Renewable Portfolio Standard (RPS) or cap-and-trade system. − However, the co-combustion of simply blended fuels has a significant problem; they show independent combustion behavior of each fuel.…”

Section: Introductionmentioning

confidence: 99%

“…1−3 Thus, there have been a number of publications reporting on utilization of sewage sludge as a fuel for coal-fired power plants and gasification-based facilities. 4−6 Sewage sludge as a fuel is usually blended with coal or other fuels to prepare sewage sludge and coal slurry (PBS fuel), sewage sludge and meat and bone meal (PBM fuel), sewage sludge with sawdust (PBT fuel), and refuse-derived fuels (RDFs) with a high calorific value 3,7 which is co-combusted in a boiler or gasifier to compensate its low calorific value. Such co-combustion of sewage sludge and other fuels results in the reduction of CO 2 emission because the sewage sludge originates from biomass, and we can readily comply with the Renewable Portfolio Standard (RPS) or cap-and-trade system.…”

Section: ■ Introductionmentioning

confidence: 99%

Two-in-One Fuel Combining Sewage Sludge and Bioliquid

Lee

Lee²,

Park³

et al. 2016

ACS Sustainable Chem. Eng.

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In this study, we first proposed hybrid sludge as a two-in-one fuel combining bioliquid (molasses and glycerol) with digested sewage sludge. The hybrid sludge is easily prepared by impregnation of sludge with bioliquid, and drying (or carbonization). After drying and carbonization treatment below 250 °C, the embedded bioliquid plays an important role as a artificial volatile matter or fixed carbon, which improves the calorific value of hybrid sludge. The hybrid sludge is denoted as hybrid sewage sludge by Korea Institute of Energy Research (HSK). Furthermore, the HSK is classified by the biomass types such as the glycerol-impregnated HSK (HSK-g) and molasses-impregnated HSK (HSK-m). Compared with digested sewage sludge, the net calorific value (NCV) of hybrid sludges increased by about 9–12 MJ/kg. The blended samples of dried sewage sludge and molasses (or glycerol) showed multistep combustion behavior, whereas hybrid sludge with molasses (or glycerol) confined inside sludge pores showed a single combustion pattern, which has a beneficial influence on an unburned carbon. In addition to such good combustion performance, the hybrid sludge provided a hydrophobic surface by dehydroxylation and decarboxylation reaction during thermal treatment. The hydrophobicity of HSK-m can prevent a falloff in the calorific value and a rise in transportation cost, which might be caused by readsorption of moisture.

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“…Finding alternative energy sources, such as bioenergy, is necessary. Carbonization technology can transform sludge into a carbon-containing product that can be used as biocoal and co-fired with fossil coal to generate electricity in power plants [4][5][6][7][8]. Carbonizing sludge reduces its volume to approximately one-eighth of the sludge cake, increases its calorific value, removes its odor, and improves its combustibility and grindability, making it a better co-firing material for pulverized coal power plants [4,5,9].…”

Section: Introductionmentioning

confidence: 99%

Environmental Effects of Sewage Sludge Carbonization and Other Treatment Alternatives

et al. 2013

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Carbonization is a newly developed process that converts sewage sludge to biocoal, a type of solid biomass that can partially substitute for coal during power generation. This study presents an assessment of the environmental effects of various sewage sludge treatment processes, including carbonization, direct landfills, co-incineration with municipal solid waste, and mono-incineration in Taiwan. This assessment was conducted using the life cycle assessment software SimaPro 7.2 and the IMPACT2002+ model. Results show that carbonization is the best approach for sewage sludge treatment, followed in descending order by co-incineration with municipal solid waste, direct landfills, and mono-incineration. The carbonization process has noticeable positive effects in the environmental impact categories of terrestrial ecotoxicity, aquatic ecotoxicity, land occupation, ionizing radiation, aquatic eutrophication, non-renewable energy, and mineral extraction. For the emission quantity of greenhouse gases, landfilling has the greatest impact (296.9 kg CO 2 eq./t sludge), followed by mono-incineration (232.2 kg CO 2 eq./t sludge) and carbonization (146.1 kg CO 2 eq./t sludge). Co-incineration with municipal solid waste has the benefit of reducing green house gas emission (-15.4 kg CO 2 eq./t sludge). In the aspect of energy recovery, sewerage sludge that has been pretreated by thickening, digestion, and dewatering still retains a high moisture content, and thus requires a significant amount of energy use when used as a substitute solid fuel. Therefore, the carbonization of sewage sludge would be a more sustainable option if the energy delivery and integration processes are made more efficient.

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Effects of carbonization and solvent-extraction on change in fuel characteristics of sewage sludge

Cited by 13 publications

References 22 publications

Co‐combustion of lignite with sewage sludge and refuse‐derived fuel

Co‐combustion of lignite with sewage sludge and refuse‐derived fuel

Two-in-One Fuel Combining Sewage Sludge and Bioliquid

Environmental Effects of Sewage Sludge Carbonization and Other Treatment Alternatives

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