The effect of acid treatment on the pyrolysis behavior of sewage sludges

Gascó, Gabriel; Cueto, M.J.; Méndez, Ana

doi:10.1016/j.jaap.2007.03.009

Cited by 30 publications

(19 citation statements)

References 18 publications

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“…The percentage of sewage sludge ash was close to what Sanchez et al [8] and Gascó et al [9] found, respectively 32.4% (m/m) and 32.5% (m/m). The high ash content in the sewage sludge promotes the contact between the metals and the organic matter, making that the volatile detachment reactions occur at lower temperatures (Mohan et al [10]).…”

Section: Characterization Of Sewage Sludgesupporting

confidence: 87%

Pyrolysis: an alternative technology for sustainable energy from sewage sludge

Vieira¹,

Castilho²,

Dweck³

et al. 2016

WIT Transactions on Ecology and the Environment

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Sewage sludge production tends to grow due to the increased amount of treated sewage. Additionally, the limitations of the disposal lead to the need for alternative processes for technological use of this residue and pyrolysis is a promising way to obtain products with potential energy, such as bio-oil. In this work, the characterization of wastewater and the application of catalytic pyrolysis sludge had the addition of Fe 2 O 3 as a catalyst, in order to optimize the bio-oil production. . The thermal behavior of the sewage sludge was analyzed by thermogravimetric analysis (TGA), to check the catalytic activity of iron oxide with increasing volatilization and cracking of the organic substances present in sewage sludge, and thus reducing the formation of solid fraction. In the pyrolysis process an experimental planning of 2³ with a central point has been used, and the effect of variables was analyzed at different process temperatures (450°C, 500°C and 550°C), time (120 min, 150 min and 180 min), heating rates (10°C.min ) in the yield of obtained products. Statistical analysis showed that the temperature influenced the yields of bio-oil in a positive and significant way, the maximum yield was in the order of 15.60% (m/m) under the following conditions: temperature 550°C, time 180 min and 10°C.min -1 heating rate. Moreover, the bio-oil obtained from sewage sludge by pyrolysis can be used in the chemical industry and in power generation.

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Section: Characterization Of Sewage Sludgesupporting

confidence: 87%

Pyrolysis: an alternative technology for sustainable energy from sewage sludge

Vieira¹,

Castilho²,

Dweck³

et al. 2016

WIT Transactions on Ecology and the Environment

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“…A banda larga de adsorção entre 3000 e 3600 cm -1 corresponde aos estiramentos O-H (fenóis, álcoois e grupos carboxílicos) e N-H (grupos aminos e amidos) e, também, assinala a presença de umidade (Gasco et al, 2007;Sonai, 2012). As bandas entre 2924 e 2914 cm -1 correspondem a estiramentos assimétricos de ligações C-H alifáticas.…”

Section: Resultsunclassified

Produção De Adsorventes a Partir De Biomassa De Efluentes Industriais

Scheibe¹,

Leal²,

Gonsales³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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“…Pyrolysis is a process of organic material decomposition in an inert atmosphere at high temperature, forming gaseous, liquid and solid products (Caballero et al, 1997;Conesa et al, 1998;Fonts et al, 2009;Gasco et al, 2007). Research in the field of sludge pyrolysis is focused mainly on the influence of process conditions on the yield of pyrolytical products and their utilisation.…”

Section: Pyrolysis Of Wastementioning

confidence: 99%

“…Gaseous and liquid products from sludge pyrolysis can be used as sources of energy or as organic substances. Pyrolytic coke can be used as an absorber based on carbon (Caballero et al, 1997;Conesa et al, 1998;Fonts et al, 2009;Gasco et al, 2007;Inguanzo et al, 2002;Menéndez et al, 2004). In addition, pyrolysis could increase the possibility for the concentration of heavy metals into pyrolytic remains, thus avoiding the production of toxic substances formed during combustion (Caballero et al, 1997;Conesa et al, 1998;Domínguez et al, 2006).…”

Section: Pyrolysis Of Wastementioning

confidence: 99%

“…The yield of pyrolysis products as well as their composition and properties are also influenced by the content of organic substances and volatile combustible matter (Caballero et al, 1997;Conesa et al, 1998;Fonts et al, 2009;Gasco et al, 2007;Raveendran et al, 1995). Inorganic compounds contained in sludge can influence the process of pyrolysis through their catalytic effects.…”

Section: Pyrolysis Of Wastementioning

confidence: 99%

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The influence of hygienisation of sewage sludge on the process of pyrolysis

Čížková¹,

Juchelková²,

Raclavská³

2011

Chemical and Process Engineering

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The aim of this work was to determine the influence of liming on the process of pyrolysis. Three samples of sludge from two wastewater treatment plants were selected for this study on pyrolysis: sludge without liming and limed sludge from the Central Wastewater Treatment Plant in Ostrava and sludge from the Wastewater Treatment Plant in Sviadnov. The samples had different content of calcite (CaCO 3 ). The limed sludge contained 7% of CaCO 3 , sludge without liming 3.8% and sludge without liming from WWTP Sviadnov contained 0.5% of calcite. The results of laboratory pyrolysis proved that limed sludge released the maximum amount of carbon -55.46 %, while sludge without liming from WWTP Sviadnov released only 48.92%. Calcite produces during its decomposition CaO and the product influences the pyrolysis process because it supports cracking of volatile organic compounds

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The effect of acid treatment on the pyrolysis behavior of sewage sludges

Cited by 30 publications

References 18 publications

Pyrolysis: an alternative technology for sustainable energy from sewage sludge

Pyrolysis: an alternative technology for sustainable energy from sewage sludge

Produção De Adsorventes a Partir De Biomassa De Efluentes Industriais

The influence of hygienisation of sewage sludge on the process of pyrolysis

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