Energetically efficient microwave disintegration of waste activated sludge for biofuel production by zeolite: Quantification of energy and biodegradability modelling

J. Rajesh Banu, A. Parvathy Eswari, S. Kavitha, R. Yukesh Kannah, Gopalakrishnan Kumar, Mamdoh T. Jamal, Ganesh Dattatraya Saratale, Dinh Duc Nguyen, Doo Geun Lee, Soon Woong Chang

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Hydrolysis of waste activated sludge (WAS) is a challenging process towards enhanced biofuel production. In this study, an attempt has been made to improve hydrolysis of WAS by zeolite that acts as a cation binding agent and deaggregates sludge flocs and deflocculates it by removing extracellular polymeric substances. The overall result confirmed that 0.04 g/g SS of zeolite was perceived to be the optimum dosage for deaggregation of flocs. The degree of dissociation was in the range of 93%, which reveals that 0.04 g/g SS (suspended solids) of zeolite was best for the deaggregation of flocs. To evaluate the impact of deaggregated WAS on biomass disintegration, the WAS was exposed to microwave (MW) liquefaction. The result of the MW disintegration shows that the solids reduction and lysis rate of floc deaggregated (zeolite mediated microwave liquefaction) (Ze-MWL) sample with the optimum (0.04 g/g SS) dosage of zeolite was 33.1% and 42.8% comparatively more than microwave liquefaction (MWL) (21% and 26.8%) sample alone. Chiefly zeolite usage reduced microwave specific energy applied for liquefaction of sludge. The outcome of hydrogen and methane potential assay (0.18 and 0.59 L/gCOD achieved for Ze-MWL) revealed the role of zeolite in improving microwave mediated WAS liquefaction. Quantification of energy and estimation of cost revealed that the Ze-MW liquefaction was cost-effective by achieving net yield of 26 €/Ton of sludge.

Original languageEnglish
Pages (from-to)2274-2288
Number of pages15
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusPublished - 2019 Jan 22

Fingerprint

activated sludge
biodegradability
Disintegration
Biodegradability
liquefaction
disintegration
Biofuels
Liquefaction
Microwaves
microwaves
sludge
energy
hydrolysis
Hydrolysis
costs
dosage
biomass
Costs
Assays
Methane

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Rajesh Banu, J. ; Parvathy Eswari, A. ; Kavitha, S. ; Yukesh Kannah, R. ; Kumar, Gopalakrishnan ; Jamal, Mamdoh T. ; Saratale, Ganesh Dattatraya ; Nguyen, Dinh Duc ; Lee, Doo Geun ; Chang, Soon Woong. / Energetically efficient microwave disintegration of waste activated sludge for biofuel production by zeolite : Quantification of energy and biodegradability modelling. In: International Journal of Hydrogen Energy. 2019 ; pp. 2274-2288.
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abstract = "Hydrolysis of waste activated sludge (WAS) is a challenging process towards enhanced biofuel production. In this study, an attempt has been made to improve hydrolysis of WAS by zeolite that acts as a cation binding agent and deaggregates sludge flocs and deflocculates it by removing extracellular polymeric substances. The overall result confirmed that 0.04 g/g SS of zeolite was perceived to be the optimum dosage for deaggregation of flocs. The degree of dissociation was in the range of 93{\%}, which reveals that 0.04 g/g SS (suspended solids) of zeolite was best for the deaggregation of flocs. To evaluate the impact of deaggregated WAS on biomass disintegration, the WAS was exposed to microwave (MW) liquefaction. The result of the MW disintegration shows that the solids reduction and lysis rate of floc deaggregated (zeolite mediated microwave liquefaction) (Ze-MWL) sample with the optimum (0.04 g/g SS) dosage of zeolite was 33.1{\%} and 42.8{\%} comparatively more than microwave liquefaction (MWL) (21{\%} and 26.8{\%}) sample alone. Chiefly zeolite usage reduced microwave specific energy applied for liquefaction of sludge. The outcome of hydrogen and methane potential assay (0.18 and 0.59 L/gCOD achieved for Ze-MWL) revealed the role of zeolite in improving microwave mediated WAS liquefaction. Quantification of energy and estimation of cost revealed that the Ze-MW liquefaction was cost-effective by achieving net yield of 26 €/Ton of sludge.",
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Energetically efficient microwave disintegration of waste activated sludge for biofuel production by zeolite : Quantification of energy and biodegradability modelling. / Rajesh Banu, J.; Parvathy Eswari, A.; Kavitha, S.; Yukesh Kannah, R.; Kumar, Gopalakrishnan; Jamal, Mamdoh T.; Saratale, Ganesh Dattatraya; Nguyen, Dinh Duc; Lee, Doo Geun; Chang, Soon Woong.

In: International Journal of Hydrogen Energy, 22.01.2019, p. 2274-2288.

Research output: Contribution to journalArticle

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T1 - Energetically efficient microwave disintegration of waste activated sludge for biofuel production by zeolite

T2 - Quantification of energy and biodegradability modelling

AU - Rajesh Banu, J.

AU - Parvathy Eswari, A.

AU - Kavitha, S.

AU - Yukesh Kannah, R.

AU - Kumar, Gopalakrishnan

AU - Jamal, Mamdoh T.

AU - Saratale, Ganesh Dattatraya

AU - Nguyen, Dinh Duc

AU - Lee, Doo Geun

AU - Chang, Soon Woong

PY - 2019/1/22

Y1 - 2019/1/22

N2 - Hydrolysis of waste activated sludge (WAS) is a challenging process towards enhanced biofuel production. In this study, an attempt has been made to improve hydrolysis of WAS by zeolite that acts as a cation binding agent and deaggregates sludge flocs and deflocculates it by removing extracellular polymeric substances. The overall result confirmed that 0.04 g/g SS of zeolite was perceived to be the optimum dosage for deaggregation of flocs. The degree of dissociation was in the range of 93%, which reveals that 0.04 g/g SS (suspended solids) of zeolite was best for the deaggregation of flocs. To evaluate the impact of deaggregated WAS on biomass disintegration, the WAS was exposed to microwave (MW) liquefaction. The result of the MW disintegration shows that the solids reduction and lysis rate of floc deaggregated (zeolite mediated microwave liquefaction) (Ze-MWL) sample with the optimum (0.04 g/g SS) dosage of zeolite was 33.1% and 42.8% comparatively more than microwave liquefaction (MWL) (21% and 26.8%) sample alone. Chiefly zeolite usage reduced microwave specific energy applied for liquefaction of sludge. The outcome of hydrogen and methane potential assay (0.18 and 0.59 L/gCOD achieved for Ze-MWL) revealed the role of zeolite in improving microwave mediated WAS liquefaction. Quantification of energy and estimation of cost revealed that the Ze-MW liquefaction was cost-effective by achieving net yield of 26 €/Ton of sludge.

AB - Hydrolysis of waste activated sludge (WAS) is a challenging process towards enhanced biofuel production. In this study, an attempt has been made to improve hydrolysis of WAS by zeolite that acts as a cation binding agent and deaggregates sludge flocs and deflocculates it by removing extracellular polymeric substances. The overall result confirmed that 0.04 g/g SS of zeolite was perceived to be the optimum dosage for deaggregation of flocs. The degree of dissociation was in the range of 93%, which reveals that 0.04 g/g SS (suspended solids) of zeolite was best for the deaggregation of flocs. To evaluate the impact of deaggregated WAS on biomass disintegration, the WAS was exposed to microwave (MW) liquefaction. The result of the MW disintegration shows that the solids reduction and lysis rate of floc deaggregated (zeolite mediated microwave liquefaction) (Ze-MWL) sample with the optimum (0.04 g/g SS) dosage of zeolite was 33.1% and 42.8% comparatively more than microwave liquefaction (MWL) (21% and 26.8%) sample alone. Chiefly zeolite usage reduced microwave specific energy applied for liquefaction of sludge. The outcome of hydrogen and methane potential assay (0.18 and 0.59 L/gCOD achieved for Ze-MWL) revealed the role of zeolite in improving microwave mediated WAS liquefaction. Quantification of energy and estimation of cost revealed that the Ze-MW liquefaction was cost-effective by achieving net yield of 26 €/Ton of sludge.

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