The mixture of sewage sludge and biomass waste as solid biofuels: Process characteristic and environmental implication

Chen, Jiacong; He, Yao; Liu, Jingyong; Liu, Chao; Xie, Wei; Kuo, Jia‐Hong; Zhang, Xiaochun; Li, Shoupeng; Liang, Jialin; Sun, Shuiyu; Büyükada, Musa; Evrendilek, Fatih

doi:10.1016/j.renene.2019.01.119

Cited by 35 publications

(12 citation statements)

References 71 publications

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“…The ignition delay time declined significantly when oxygen concentration transformed from 21% to 50%. Chen et al studied ignition and volatile combustion behaviors. It was also concluded that the ignition delay time dwindled as the oxygen concentration rose.…”

Section: Resultsmentioning

confidence: 99%

“…This was because the higher the oxygen concentration, the shorter the time for the volatiles to ignite and the shorter the distance traveled . The burning of lignite in a fluidized bed was also such a behavior, and volatile flame shrank and brightened as oxygen concentration increased . This phenomenon was particularly distinct when the oxygen concentration was less than 50%.…”

Section: Resultsmentioning

confidence: 99%

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An experimental study of single unconventional biomass pellets: Ignition characteristics, combustion processes, and artificial neural network modeling

Lin

Wang

et al. 2020

Int J Energy Res

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Summary This study applied the artificial neural networks (ANNs) model to the thermal data obtained by suspension ignition and combustion experiment of single peanut shells (PS, millimeter scale) pellet under O2/CO2 atmosphere. ANN11 was the best ANN model for predicting the relevant parameters of PS combustion. The coincidence between ANN prediction data and experimental data was over 99%. Two modes of biomass pellet ignition were observed: homogeneous ignition of volatiles and hetero‐homogeneous ignition of volatiles and char simultaneously. The ignition mode was transformed from homogeneous ignition to hetero‐homogeneous ignition when oxygen concentration was 50%. In addition, it was observed that ignition at the bottom emerged first, and then the upper end was ignited, finally generating an envelope flame. This phenomenon occurred when gas flow temperature exceeded 873 K or the oxygen concentration was greater than 50%. The reduction of ignition delay time and internal ignition temperature from 21% to 50% oxygen concentration was more intense than that of 50% to 100% oxygen concentration. Increasing oxygen concentration or temperature resulted in a shorter, brighter, and more stable volatile flame of biomass pellets, which reduced volatile burnout time. Nevertheless, the impact of gas flow rate on biomass combustion was intricate and irregular.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

An experimental study of single unconventional biomass pellets: Ignition characteristics, combustion processes, and artificial neural network modeling

Lin

Wang

et al. 2020

Int J Energy Res

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“…The thermogravimetric analysis of raw materials and blends, in air (O2/N2, 21/79) and oxy-fuel (O2/CO2, 21/79) atmospheres, revealed that the replacement of N2 with CO2 decreases the burnout performance. The resulted NO emissions, after the char combustions, were lower for blends than for sewage sludge [21].…”

mentioning

confidence: 85%

“…The char resulted as by-product from the sewage sludge pyrolysis (SS) can be used to improve the soil fertility and to increase the cationic capacity, pH value and soil ability to retain water [18][19][20]. Also, the sludge mixed with coffee ground residues, resulted from instant coffee processing, conducted to the obtaining of solid biofuels [21]. The thermogravimetric analysis of raw materials and blends, in air (O2/N2, 21/79) and oxy-fuel (O2/CO2, 21/79) atmospheres, revealed that the replacement of N2 with CO2 decreases the burnout performance.…”

mentioning

confidence: 99%

Thermochemical Decomposition of Sewage Sludge � An Eco-Friendly Solution for a Sustainable Energy Future by Using Wastes

Zaharioiu¹,

Bucura²,

Ionete³

et al. 2020

Rev. Chim.

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The study aims to promote clean energy technologies that ensure the recycling and recovery of waste, namely the sewage sludge (SS), by converting it into products (e.g. oil, gas) with added value, contributing thus to reducing the negative impact on environment and health. An experimental setup was proposed in order to achieve the pyrolysis process, by varying the heating rate, (5�C/min, 10�C/min and 50�C/min). The resulted products, namely i) char - SSPyChar, ii) oil - SSPyOil and iii) gas - SSPyGas, were investigated in terms of elemental content, high heat value (HHV), low heat value (LHV) and emission factor (EF). The pyrolysis oils obtained with lower heating rate, 5�C/min and 10 �C/min, presented higher HHV, in comparison with the oils obtained at 50 �C/min, which were rich in water. These oils can have a negative impact on the environment, through their combustion due to their high content of N (6 wt%) and S (1.2 wt%), responsible for the formation of NOx and SOx. Pyrolysis gas revealed in its composition high contents of hydrocarbons (C1-C6), carbon dioxide (CO2) and hydrogen (H2). The highest HHV was obtained by using 5�C/min increment, namely 33.81 MJ/m3. Also, the pyrolysis gases had comparable energy values with natural gas, biogas or gases resulted from the plastic pyrolysis.

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“…They determined the contest of esters of biodiesel by triacylglycerol and microscale open column chromatography. Chen et al (2019) compared the use of oxy-fuel and air atmospheres to (co-)combust wastewater sludge, biomass waste, and coffee ground residues (CG) via thermogravimetric analysis (TGA). They found the combustion performance of wastewater sludge did not have a significant difference in both atmospheres.…”

Section: Feedstocksmentioning

confidence: 99%

Bioenergy from biofuel residues and waste

Sheehan

Murray

et al. 2020

Water Environment Research

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The mixture of sewage sludge and biomass waste as solid biofuels: Process characteristic and environmental implication

Cited by 35 publications

References 71 publications

An experimental study of single unconventional biomass pellets: Ignition characteristics, combustion processes, and artificial neural network modeling

An experimental study of single unconventional biomass pellets: Ignition characteristics, combustion processes, and artificial neural network modeling

Thermochemical Decomposition of Sewage Sludge � An Eco-Friendly Solution for a Sustainable Energy Future by Using Wastes

Bioenergy from biofuel residues and waste

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