Incineration of Municipal Sewage Sludge in a Fluidized Bed Reactor

Kowarska, Beata; Baron, Jerzy; Kandefer, Stanisław; Żukowski, Witold

doi:10.4236/eng.2013.51a018

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…The experimental setup used in this study was developed by Hernandez et al [8]. It has been established that this reactor is Abbreviation (Volumes are given in m 3 conversion rate consistent to study the pollutants and fuel gas release during pure steam gasification [5,8]. The equipment consists on a laboratory scale semi-batch gasifier.…”

Section: Methodsmentioning

confidence: 99%

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

Akkache

Hernández

Teixeira

et al. 2016

Biomass and Bioenergy

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International audienceGasification 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 À3. The major concerns regarding the wastewater sludge were the pollutants precursors' release (NH 3 , 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

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Section: Methodsmentioning

confidence: 99%

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

Akkache

Hernández

Teixeira

et al. 2016

Biomass and Bioenergy

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“…Fluidized bed reactor [32] 100% SS, 30% SS/62% coal/8% CaCO 3 800 • C Decline of SO 2 emissions during the co-combustion of SS and coal with CaCO 3 Fluidized bed reactor [33] 100% SS 700 To the best of our knowledge, there is a lack of data in the literature on SS and its co-combustion behavior with high ash bituminous coal similar to those produced in Kazakhstan. To this end, this work presents the mono and co-combustion of sewage sludge.…”

Section: Type Of Reactormentioning

confidence: 99%

Thermal Characterization, Kinetic Analysis and Co-Combustion of Sewage Sludge Coupled with High Ash Ekibastuz Coal

Aidabulov,

Zhakupov,

Zhunussova

et al. 2023

Energies

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Efficient utilization of natural resources and possible valorization of solid waste materials such as sewage sludge into secondary materials via thermal conversion and simultaneously recovering energy is vital for sustainable development. The continuous increase in metropolises leads to an enormous production of wet sewage sludge, which creates major environmental and technical issues. In this paper, the samples of sewage sludge from Astana’s waste water treatment plant are analyzed for their thermochemical properties, followed by thermogravimetric and kinetic analysis using the Flynn–Wall–Ozawa and Kissinger–Akahira–Sunose methods. Overall, the calorific value of sewage sludge sample was 18.87 MJ/kg and was comparable to that of the bituminous coal samples. The activation energy varied from 140 to 410 kJ/mol with changing conversion from 0.1 to 0.7. Further, mono-combustion and co-combustion experiments of the sewage sludge with high ash bituminous coal were conducted using the laboratory scale bubbling fluidized bed rig, respectively. The difference in NOx emissions between mono-combustion of sewage sludge and co-combustion with coal were at around 150 ppm, while this value for SO2 was similar in average, but fluctuates between 150 and 350 ppm. Overall, the findings of this study will be useful in developing a co-combustion technology for a sustainable disposal of municipal sewage sludge.

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“…This high hydration is the main reason why the sludge before undergoing thermal transformation (incineration) should be fully or partially dried. Unfortunately, during the drying process and then combustion, many chemical substances some of which are toxic, carcinogenic, etc., are emitted to the atmosphere [5][6][7][8][9][10][11]. Therefore, a key role for the environmental safety of waste incineration plants is to reduce these emissions.…”

Section: Introductionmentioning

confidence: 99%

Ammonia Emission from Sewage Sludge Incineration Process

Wielgosiński

Cichowicz

Wiśniewski³

2016

Ecological Chemistry and Engineering S

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Abstract:In quantitative terms, sludge produced in the process of municipal wastewater treatment represents a small part of the total waste generated in municipal sources -its quantity represents only a few percent of the generated mass of municipal waste. However, the threats it brings, do not allow it to be neglected while designing the wastewater treatment process. At the same time, with increasing requirements regarding the quality of sewage discharged into the environment, there is an increase in the amount of sludge produced in wastewater treatment processes. In recent years, the share of thermal treatment of municipal sewage sludge has risen sharply -about 12 modern sludge incineration plants have been built and construction of new ones is considered. During more than a four-year operation of the sewage sludge incineration plant in the Combined Sewage Treatment Plant in Lodz (GOS) a large ammonia emission from the combustion process was observed. So, a decision was taken to examine this process. The paper presents results of ammonia emission from the combustion of sewage sludge from GOS as a function of temperature.

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Incineration of Municipal Sewage Sludge in a Fluidized Bed Reactor

Cited by 8 publications

References 22 publications

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

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

Thermal Characterization, Kinetic Analysis and Co-Combustion of Sewage Sludge Coupled with High Ash Ekibastuz Coal

Ammonia Emission from Sewage Sludge Incineration Process

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