Rhamnolipid induced deagglomeration of anaerobic granular biosolids for energetically feasible ultrasonic homogenization and profitable biohydrogen

Kavitha S, Yukesh Kannah R, Gunasekaran M, Rajesh Banu J, Gopalakrishnan Kumar

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The present study exposes the effect of deagglomeration using rhamnolipid on anaerobic granular biosolids (AGB) followed by ultrasonic homogenization for effective biohydrogen production. Rhamnolipid was used to remove the extracellular polymeric substance bound over the surface of AGB to increase the rate of biogranular lysis during ultrasonic homogenization. Extracellular polymeric substance (EPS) removal was achieved at an optimum rhamnolipid dosage of 0.04 g Rh/g SS. Ultrasonic homogenization (UH) of AGB demands 27016 kJ/kg TS of specific energy to achieve 16.8% and 13.9% of biogranular lysis and biosolids reduction, respectively. However, rhamnolipid-alkaline pH induced ultrasonic homogenization (RAUH) demand lesser (12607 kJ/kg TS) and achieves greater biogranular lysis (25.4%) and biosolids reduction (20.7%). RAUH significantly saves the net energy. Exponential first order kinetic analysis was done to evaluate and compare the biohydrogen production potential of RAUH with that of UH. The biohydrogen production was found to be 55.1 mL H 2 /g COD and 36.7 mL H 2 /g COD for RAUH and UH respectively. A higher positive net energy of 2.62 kWh/kg AGB was achieved by RAUH when compared to UH (−3.49 kWh/kg anaerobic granular biosolids).

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusAccepted/In press - 2019 Jan 1

Fingerprint

Biosolids
homogenizing
ultrasonics
Ultrasonics
crack opening displacement
energy

All Science Journal Classification (ASJC) codes

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

Cite this

@article{db47ce51363145e2afdc304722a6c30f,
title = "Rhamnolipid induced deagglomeration of anaerobic granular biosolids for energetically feasible ultrasonic homogenization and profitable biohydrogen",
abstract = "The present study exposes the effect of deagglomeration using rhamnolipid on anaerobic granular biosolids (AGB) followed by ultrasonic homogenization for effective biohydrogen production. Rhamnolipid was used to remove the extracellular polymeric substance bound over the surface of AGB to increase the rate of biogranular lysis during ultrasonic homogenization. Extracellular polymeric substance (EPS) removal was achieved at an optimum rhamnolipid dosage of 0.04 g Rh/g SS. Ultrasonic homogenization (UH) of AGB demands 27016 kJ/kg TS of specific energy to achieve 16.8{\%} and 13.9{\%} of biogranular lysis and biosolids reduction, respectively. However, rhamnolipid-alkaline pH induced ultrasonic homogenization (RAUH) demand lesser (12607 kJ/kg TS) and achieves greater biogranular lysis (25.4{\%}) and biosolids reduction (20.7{\%}). RAUH significantly saves the net energy. Exponential first order kinetic analysis was done to evaluate and compare the biohydrogen production potential of RAUH with that of UH. The biohydrogen production was found to be 55.1 mL H 2 /g COD and 36.7 mL H 2 /g COD for RAUH and UH respectively. A higher positive net energy of 2.62 kWh/kg AGB was achieved by RAUH when compared to UH (−3.49 kWh/kg anaerobic granular biosolids).",
author = "Kavitha S and {Kannah R}, Yukesh and Gunasekaran M and {Banu J}, Rajesh and Gopalakrishnan Kumar",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.ijhydene.2019.04.063",
language = "English",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Rhamnolipid induced deagglomeration of anaerobic granular biosolids for energetically feasible ultrasonic homogenization and profitable biohydrogen

AU - S, Kavitha

AU - Kannah R, Yukesh

AU - M, Gunasekaran

AU - Banu J, Rajesh

AU - Kumar, Gopalakrishnan

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The present study exposes the effect of deagglomeration using rhamnolipid on anaerobic granular biosolids (AGB) followed by ultrasonic homogenization for effective biohydrogen production. Rhamnolipid was used to remove the extracellular polymeric substance bound over the surface of AGB to increase the rate of biogranular lysis during ultrasonic homogenization. Extracellular polymeric substance (EPS) removal was achieved at an optimum rhamnolipid dosage of 0.04 g Rh/g SS. Ultrasonic homogenization (UH) of AGB demands 27016 kJ/kg TS of specific energy to achieve 16.8% and 13.9% of biogranular lysis and biosolids reduction, respectively. However, rhamnolipid-alkaline pH induced ultrasonic homogenization (RAUH) demand lesser (12607 kJ/kg TS) and achieves greater biogranular lysis (25.4%) and biosolids reduction (20.7%). RAUH significantly saves the net energy. Exponential first order kinetic analysis was done to evaluate and compare the biohydrogen production potential of RAUH with that of UH. The biohydrogen production was found to be 55.1 mL H 2 /g COD and 36.7 mL H 2 /g COD for RAUH and UH respectively. A higher positive net energy of 2.62 kWh/kg AGB was achieved by RAUH when compared to UH (−3.49 kWh/kg anaerobic granular biosolids).

AB - The present study exposes the effect of deagglomeration using rhamnolipid on anaerobic granular biosolids (AGB) followed by ultrasonic homogenization for effective biohydrogen production. Rhamnolipid was used to remove the extracellular polymeric substance bound over the surface of AGB to increase the rate of biogranular lysis during ultrasonic homogenization. Extracellular polymeric substance (EPS) removal was achieved at an optimum rhamnolipid dosage of 0.04 g Rh/g SS. Ultrasonic homogenization (UH) of AGB demands 27016 kJ/kg TS of specific energy to achieve 16.8% and 13.9% of biogranular lysis and biosolids reduction, respectively. However, rhamnolipid-alkaline pH induced ultrasonic homogenization (RAUH) demand lesser (12607 kJ/kg TS) and achieves greater biogranular lysis (25.4%) and biosolids reduction (20.7%). RAUH significantly saves the net energy. Exponential first order kinetic analysis was done to evaluate and compare the biohydrogen production potential of RAUH with that of UH. The biohydrogen production was found to be 55.1 mL H 2 /g COD and 36.7 mL H 2 /g COD for RAUH and UH respectively. A higher positive net energy of 2.62 kWh/kg AGB was achieved by RAUH when compared to UH (−3.49 kWh/kg anaerobic granular biosolids).

UR - http://www.scopus.com/inward/record.url?scp=85064680082&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064680082&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2019.04.063

DO - 10.1016/j.ijhydene.2019.04.063

M3 - Article

AN - SCOPUS:85064680082

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

ER -