Microwave co-pyrolysis of sewage sludge and rice straw

Huang, Ya-Chi; Shih, Chun-Hao; Chiueh, Pei-Te; Lo, Shang‐Lien

doi:10.1016/j.energy.2015.05.039

Cited by 98 publications

(18 citation statements)

References 42 publications

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“…It was found that the effect of co-pyrolysis on bio-oil was strongly affected by the biomass fuel types. Huang et al [16] observed that the addition of rice straw increased the performance of microwave heating and proposed that the reason could be attributed to the synergetic effect. Zhu et al [17] presented that there was no significant synergetic effect existed during the thermal decomposition of mixed sewage sludge and pine sawdust by thermogravimetric analysis.…”

Section: Introductionmentioning

confidence: 99%

Synergetic effect of sewage sludge and biomass co-pyrolysis: A combined study in thermogravimetric analyzer and a fixed bed reactor

Wang

Deng

Tan

et al. 2016

Energy Conversion and Management

159

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Much attention has been given to the valuable products from sewage sludge pyrolysis. In this study, the pyrolysis of sewage sludge, biomass (wheat straw) and their mixtures in different proportions were carried out in a thermogravimetric analyzer (TGA) and fixed-bed reactor. The effects of pyrolysis temperature and percentage of wheat straw in wheat straw-sewage sludge mixtures on product distributions in terms of gas, liquid and char and the gas composition were investigated. Results indicate that there is a significantly synergetic effect during the co-pyrolysis processes of sewage sludge and wheat straw, accelerating the pyrolysis reactions. The synergetic effect resulted in an increase in gas and liquid yields but a decrease in char yield. The gas composition and the synergetic effect degree are strongly affected by the wheat straw proportions, and the strongest synergetic effect of sewage sludge and wheat straw co-pyrolysis appears at the biomass proportion of 60 %. With an increase of temperature, the gas yield from sewage sludge pyrolysis increased but the liquid and char 2 / 22 yields decreased. Moreover, the required heat of co-pyrolysis is significantly reduced compared with the pyrolysis of sewage sludge and wheat straw pyrolysis alone, because of the exothermic reactions between the ash components in two fuel samples.

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Section: Introductionmentioning

confidence: 99%

Synergetic effect of sewage sludge and biomass co-pyrolysis: A combined study in thermogravimetric analyzer and a fixed bed reactor

Wang

Deng

Tan

et al. 2016

Energy Conversion and Management

159

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“…Tar cracking: Tar → wH 2 + xCO + yCO 2 + zC n H m (7) In the case of RTG for which CO 2 was supplied at room temperature, the concentrations of major produced gases were 20.1% H 2 , 38% CO, 0.7% CH 4 , and 9% THCs. Compared with conventional pyrolysis/steam gasification, the amount of CO was more than H 2 .…”

Section: Methanation Reaction: Co + 3h 2 ↔ Ch 4 + H 2 Omentioning

confidence: 99%

“…Researchers are now interested in a thermal conversion treatment of biomass by the microwave (MW) heating method as an alternative to the conventional heating method [5][6][7]. MW heating is applied to the sludge so that MWs can go directly into bio-cells to vibrate molecules and atoms in the bio-cells and generate heat unlike conventional heating by conduction of external hot air [8].…”

Section: Introductionmentioning

confidence: 99%

Microwave-enhanced gasification of sewage sludge waste

Chun

Song

2018

Environmental Engineering Research

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To convert sewage sludge to energy, drying-gasification characteristics during microwave heating were studied. During the gasification of carbon dioxide, the main products were gas, followed by char, and tar in terms of the amount. The main components of the producer gas were carbon monoxide and hydrogen including a small amount of methane and light hydrocarbons. They showed a sufficient heating value as a fuel. The generated tar is gravimetric tar, which is total tar. As light tars, benzene (light aromatic tar) was a major light tar. Naphthalene, anthracene, and pyrene (light polycyclic aromatic hydrocarbon tars) were also generated, but in relatively small amounts. Ammonia and hydrogen cyanide (precursor for NOx) were generated from thermal decomposition of tar containing protein and nitrogen in sewage sludge. In the case of sludge char, its average pore diameter was small, but specific area, pore volume, and adsorption amounts were relatively large, resulting in superior adsorption characteristics.

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“…The review of paddy residues such as RH and RS were presented by Shafie, RS can be pretreated with acids and co‐digested with pig manure by AD . RS also can be treated by combustion or gasification . Supercritical methanolysis of pretreated RS with the white‐rot fungus Trichoderma sp.…”

Section: Introductionmentioning

confidence: 99%

Biogas production from most agricultural organic wastes by anaerobic digestion in Taiwan

Lin

Pai

et al. 2019

Env Prog and Sustain Energy

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Agricultural organic wastes (AOW) have the potential to provide bioenergy particularly found in biogas by anaerobic digestion (AD). In this study, the biogas production (BP) of AOW was obtained by batch AD with anaerobic digesters (500 mL) at 35°C incubator. The results showed that BP values in terms of volatile solids (VS) from rice husk, rice straw, flower residues, fruit and vegetable residues, wasted oyster shell residue (WOSR), fishery residues, livestock and poultry manures, livestock and poultry slaughter wastes (LPSW), and eight equally mixed wastes (EEMW) were 84.03, 193.36, 153.32, 76.27, 150.48, 63.26, 169.63, 615.74, and 172.83 mL/g VS, respectively. LPSW showed the highest μm of 16.99 mL/g VS‐d, the highest BP of 615.74 mL/g VS and the highest bioconversion efficiency of 65.98% compared to the other organic wastes. BP from the most AOW in Taiwan by AD was estimated to be 768,567,753 (743,522,223, excluding WOSR) m3/year. The annual BP of 768,567,753 m3/year of the eight total major AOW by AD was lower (∼20.11%) than 961,989,781 m3/year of the EEMW by anaerobic co‐digestion. Result also showed that modified Gompertz equation was suitable to describe BP accumulation and BP rate.

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Microwave co-pyrolysis of sewage sludge and rice straw

Cited by 98 publications

References 42 publications

Synergetic effect of sewage sludge and biomass co-pyrolysis: A combined study in thermogravimetric analyzer and a fixed bed reactor

Synergetic effect of sewage sludge and biomass co-pyrolysis: A combined study in thermogravimetric analyzer and a fixed bed reactor

Microwave-enhanced gasification of sewage sludge waste

Biogas production from most agricultural organic wastes by anaerobic digestion in Taiwan

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