Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step

Shifare Berhe; Seyoum Leta

doi:doi:10.11648/j.ijrse.20170601.11

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Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step

Shifare Berhe, Seyoum Leta

Published in International Journal of Sustainable and Green Energy (Volume 6, Issue 1)

Received: 28 December 2016 Accepted: 7 January 2017 Published: 16 February 2017

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Abstract

In this study, optimal working conditions for the hydrolytic-acidogenic step in two stageAnaerobic Sequencing Batch Reactor (ASBR) system during anaerobic co digestion of tannery wastewater (TWW) and dairy wastewater (DWW) were investigated. The study was carried out at laboratory scale digesters with 0.4L working volume in semi continuous mode operation under mesophilic temperature (38±2°C). Four mixing ratios of substrates (100:0, 75:25, 50:50, 25:75) at hydraulic retention time (HRT) of 5, 3 and 1days and equivalent organic loading rate (OLR) were examined to assess the effect of each operational parameter on process performance of acidogenic step in the two stageASBR. Based on the result obtained, 50:50 substrate (TWW and DWW) mixing ratio(in terms of COD), 3days HRT and OLR of 3.22gCOD/l/daywere selected as optimum operational conditions for enhanced performance of hydrolytic-acidogenic stage during two stage anaerobic co digestion of the two agro industrial wastes. In addition to this, the degree of acidification was mainly affected by higher OLR and the best result (55.5%) was achieved in the reactor 50:50 operated at 3days HRT and 2.63 gCOD/l/day OLR. In general co digestion of tannery wastewater with dairy wastewater is more important than using tannery wastewater alone for its enhanced performance. This is because of the positive synergistic effects of the co-substrates (dairy wastewater) in terms of well-balanced nutrients, an appropriate C: N ratio and a stable buffering capacity.

Published in	International Journal of Sustainable and Green Energy (Volume 6, Issue 1)
DOI	10.11648/j.ijrse.20170601.11
Page(s)	1-9
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Agro Industrial Waste, Anaerobic co Digestion, Dairy Wastewater, Hydrolytic-Acidogenic Stage, Process Stability, Process Performance, Tannery Wastewater

References

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APA Style

Shifare Berhe, Seyoum Leta. (2017). Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step. International Journal of Sustainable and Green Energy, 6(1), 1-9. https://doi.org/10.11648/j.ijrse.20170601.11

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ACS Style

Shifare Berhe; Seyoum Leta. Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step. Int. J. Sustain. Green Energy 2017, 6(1), 1-9. doi: 10.11648/j.ijrse.20170601.11

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AMA Style

Shifare Berhe, Seyoum Leta. Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step. Int J Sustain Green Energy. 2017;6(1):1-9. doi: 10.11648/j.ijrse.20170601.11

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@article{10.11648/j.ijrse.20170601.11,
  author = {Shifare Berhe and Seyoum Leta},
  title = {Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step},
  journal = {International Journal of Sustainable and Green Energy},
  volume = {6},
  number = {1},
  pages = {1-9},
  doi = {10.11648/j.ijrse.20170601.11},
  url = {https://doi.org/10.11648/j.ijrse.20170601.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijrse.20170601.11},
  abstract = {In this study, optimal working conditions for the hydrolytic-acidogenic step in two stageAnaerobic Sequencing Batch Reactor (ASBR) system during anaerobic co digestion of tannery wastewater (TWW) and dairy wastewater (DWW) were investigated. The study was carried out at laboratory scale digesters with 0.4L working volume in semi continuous mode operation under mesophilic temperature (38±2°C). Four mixing ratios of substrates (100:0, 75:25, 50:50, 25:75) at hydraulic retention time (HRT) of 5, 3 and 1days and equivalent organic loading rate (OLR) were examined to assess the effect of each operational parameter on process performance of acidogenic step in the two stageASBR. Based on the result obtained, 50:50 substrate (TWW and DWW) mixing ratio(in terms of COD), 3days HRT and OLR of 3.22gCOD/l/daywere selected as optimum operational conditions for enhanced performance of hydrolytic-acidogenic stage during two stage anaerobic co digestion of the two agro industrial wastes. In addition to this, the degree of acidification was mainly affected by higher OLR and the best result (55.5%) was achieved in the reactor 50:50 operated at 3days HRT and 2.63 gCOD/l/day OLR. In general co digestion of tannery wastewater with dairy wastewater is more important than using tannery wastewater alone for its enhanced performance. This is because of the positive synergistic effects of the co-substrates (dairy wastewater) in terms of well-balanced nutrients, an appropriate C: N ratio and a stable buffering capacity.},
 year = {2017}
}

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TY  - JOUR
T1  - Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step
AU  - Shifare Berhe
AU  - Seyoum Leta
Y1  - 2017/02/16
PY  - 2017
N1  - https://doi.org/10.11648/j.ijrse.20170601.11
DO  - 10.11648/j.ijrse.20170601.11
T2  - International Journal of Sustainable and Green Energy
JF  - International Journal of Sustainable and Green Energy
JO  - International Journal of Sustainable and Green Energy
SP  - 1
EP  - 9
PB  - Science Publishing Group
SN  - 2575-1549
UR  - https://doi.org/10.11648/j.ijrse.20170601.11
AB  - In this study, optimal working conditions for the hydrolytic-acidogenic step in two stageAnaerobic Sequencing Batch Reactor (ASBR) system during anaerobic co digestion of tannery wastewater (TWW) and dairy wastewater (DWW) were investigated. The study was carried out at laboratory scale digesters with 0.4L working volume in semi continuous mode operation under mesophilic temperature (38±2°C). Four mixing ratios of substrates (100:0, 75:25, 50:50, 25:75) at hydraulic retention time (HRT) of 5, 3 and 1days and equivalent organic loading rate (OLR) were examined to assess the effect of each operational parameter on process performance of acidogenic step in the two stageASBR. Based on the result obtained, 50:50 substrate (TWW and DWW) mixing ratio(in terms of COD), 3days HRT and OLR of 3.22gCOD/l/daywere selected as optimum operational conditions for enhanced performance of hydrolytic-acidogenic stage during two stage anaerobic co digestion of the two agro industrial wastes. In addition to this, the degree of acidification was mainly affected by higher OLR and the best result (55.5%) was achieved in the reactor 50:50 operated at 3days HRT and 2.63 gCOD/l/day OLR. In general co digestion of tannery wastewater with dairy wastewater is more important than using tannery wastewater alone for its enhanced performance. This is because of the positive synergistic effects of the co-substrates (dairy wastewater) in terms of well-balanced nutrients, an appropriate C: N ratio and a stable buffering capacity.
VL  - 6
IS  - 1
ER  -

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Author Information

Shifare Berhe

Chemistry Department, College of Natural and Computational Sciences, Jigjiga University, Jigjiga, Ethiopia
Seyoum Leta

Center for Environmental Science, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia

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Shifare Berhe, Seyoum Leta. (2017). Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step. International Journal of Sustainable and Green Energy, 6(1), 1-9. https://doi.org/10.11648/j.ijrse.20170601.11

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ACS Style

Shifare Berhe; Seyoum Leta. Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step. Int. J. Sustain. Green Energy 2017, 6(1), 1-9. doi: 10.11648/j.ijrse.20170601.11

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AMA Style

Shifare Berhe, Seyoum Leta. Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step. Int J Sustain Green Energy. 2017;6(1):1-9. doi: 10.11648/j.ijrse.20170601.11

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@article{10.11648/j.ijrse.20170601.11,
  author = {Shifare Berhe and Seyoum Leta},
  title = {Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step},
  journal = {International Journal of Sustainable and Green Energy},
  volume = {6},
  number = {1},
  pages = {1-9},
  doi = {10.11648/j.ijrse.20170601.11},
  url = {https://doi.org/10.11648/j.ijrse.20170601.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijrse.20170601.11},
  abstract = {In this study, optimal working conditions for the hydrolytic-acidogenic step in two stageAnaerobic Sequencing Batch Reactor (ASBR) system during anaerobic co digestion of tannery wastewater (TWW) and dairy wastewater (DWW) were investigated. The study was carried out at laboratory scale digesters with 0.4L working volume in semi continuous mode operation under mesophilic temperature (38±2°C). Four mixing ratios of substrates (100:0, 75:25, 50:50, 25:75) at hydraulic retention time (HRT) of 5, 3 and 1days and equivalent organic loading rate (OLR) were examined to assess the effect of each operational parameter on process performance of acidogenic step in the two stageASBR. Based on the result obtained, 50:50 substrate (TWW and DWW) mixing ratio(in terms of COD), 3days HRT and OLR of 3.22gCOD/l/daywere selected as optimum operational conditions for enhanced performance of hydrolytic-acidogenic stage during two stage anaerobic co digestion of the two agro industrial wastes. In addition to this, the degree of acidification was mainly affected by higher OLR and the best result (55.5%) was achieved in the reactor 50:50 operated at 3days HRT and 2.63 gCOD/l/day OLR. In general co digestion of tannery wastewater with dairy wastewater is more important than using tannery wastewater alone for its enhanced performance. This is because of the positive synergistic effects of the co-substrates (dairy wastewater) in terms of well-balanced nutrients, an appropriate C: N ratio and a stable buffering capacity.},
 year = {2017}
}

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TY  - JOUR
T1  - Two Phase Anaerobic Co Digestion of Tannery Wastewater and Dairy Wastewater: Effect of Operational Parameters on Performance of Hydrolytic–Acidogenic Step
AU  - Shifare Berhe
AU  - Seyoum Leta
Y1  - 2017/02/16
PY  - 2017
N1  - https://doi.org/10.11648/j.ijrse.20170601.11
DO  - 10.11648/j.ijrse.20170601.11
T2  - International Journal of Sustainable and Green Energy
JF  - International Journal of Sustainable and Green Energy
JO  - International Journal of Sustainable and Green Energy
SP  - 1
EP  - 9
PB  - Science Publishing Group
SN  - 2575-1549
UR  - https://doi.org/10.11648/j.ijrse.20170601.11
AB  - In this study, optimal working conditions for the hydrolytic-acidogenic step in two stageAnaerobic Sequencing Batch Reactor (ASBR) system during anaerobic co digestion of tannery wastewater (TWW) and dairy wastewater (DWW) were investigated. The study was carried out at laboratory scale digesters with 0.4L working volume in semi continuous mode operation under mesophilic temperature (38±2°C). Four mixing ratios of substrates (100:0, 75:25, 50:50, 25:75) at hydraulic retention time (HRT) of 5, 3 and 1days and equivalent organic loading rate (OLR) were examined to assess the effect of each operational parameter on process performance of acidogenic step in the two stageASBR. Based on the result obtained, 50:50 substrate (TWW and DWW) mixing ratio(in terms of COD), 3days HRT and OLR of 3.22gCOD/l/daywere selected as optimum operational conditions for enhanced performance of hydrolytic-acidogenic stage during two stage anaerobic co digestion of the two agro industrial wastes. In addition to this, the degree of acidification was mainly affected by higher OLR and the best result (55.5%) was achieved in the reactor 50:50 operated at 3days HRT and 2.63 gCOD/l/day OLR. In general co digestion of tannery wastewater with dairy wastewater is more important than using tannery wastewater alone for its enhanced performance. This is because of the positive synergistic effects of the co-substrates (dairy wastewater) in terms of well-balanced nutrients, an appropriate C: N ratio and a stable buffering capacity.
VL  - 6
IS  - 1
ER  -

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