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Improvement of fruit and vegetable waste anaerobic digestion performance and stability with co-substrates addition

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Title: Improvement of fruit and vegetable waste anaerobic digestion performance and stability with co-substrates addition
Authors: Bouallagui, H. hassibbouallagui@yahoo.fr, Lahdheb, H.1, Ben Romdan, E.1, Rachdi, B.1, Hamdi, M.1
Source: Journal of Environmental Management. Apr2009, Vol. 90 Issue 5, p1844-1849. 6p.
Subject Terms: *Waste treatment, *Anaerobic digestion, *Sequencing batch reactor process, *Sludge bulking, Performance evaluation, Fish waste, Slaughtering, Fruit processing plants, Vegetable processing plants
Abstract: The effect of fish waste (FW), abattoir wastewater (AW) and waste activated sludge (WAS) addition as co-substrates on the fruit and vegetable waste (FVW) anaerobic digestion performance was investigated under mesophilic conditions using four anaerobic sequencing batch reactors (ASBR) with the aim of finding the better co-substrate for the enhanced performance of co-digestion. The reactors were operated at an organic loading rate of 2.46–2.51g volatile solids (VS)l−1 d−1, of which approximately 90% were from FVW, and a hydraulic retention time of 10 days. It was observed that AW and WAS additions with a ratio of 10% VS enhanced biogas yield by 51.5% and 43.8% and total volatile solids removal by 10% and 11.7%, respectively. However FW addition led to improvement of the process stability, as indicated by the low VFAs/Alkalinity ratio of 0.28, and permitted anaerobic digestion of FVW without chemical alkali addition. Despite a considerable decrease in the C/N ratio from 34.2 to 27.6, the addition of FW slightly improved the gas production yield (8.1%) compared to anaerobic digestion of FVW alone. A C/N ratio between 22 and 25 seemed to be better for anaerobic co-digestion of FVW with its co-substrates. The most significant factor for enhanced FVW digestion performance was the improved organic nitrogen content provided by the additional wastes. Consequently, the occurrence of an imbalance between the different groups of anaerobic bacteria which may take place in unstable anaerobic digestion of FVW could be prevented. [Copyright &y& Elsevier]
Copyright of Journal of Environmental Management is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Improvement of fruit and vegetable waste anaerobic digestion performance and stability with co-substrates addition
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  Data: <searchLink fieldCode="AR" term="%22Bouallagui%2C+H%2E%22">Bouallagui, H.</searchLink><i> hassibbouallagui@yahoo.fr</i><br /><searchLink fieldCode="AR" term="%22Lahdheb%2C+H%2E%22">Lahdheb, H.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ben+Romdan%2C+E%2E%22">Ben Romdan, E.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rachdi%2C+B%2E%22">Rachdi, B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hamdi%2C+M%2E%22">Hamdi, M.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Environmental+Management%22">Journal of Environmental Management</searchLink>. Apr2009, Vol. 90 Issue 5, p1844-1849. 6p.
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  Data: *<searchLink fieldCode="DE" term="%22Waste+treatment%22">Waste treatment</searchLink><br />*<searchLink fieldCode="DE" term="%22Anaerobic+digestion%22">Anaerobic digestion</searchLink><br />*<searchLink fieldCode="DE" term="%22Sequencing+batch+reactor+process%22">Sequencing batch reactor process</searchLink><br />*<searchLink fieldCode="DE" term="%22Sludge+bulking%22">Sludge bulking</searchLink><br /><searchLink fieldCode="DE" term="%22Performance+evaluation%22">Performance evaluation</searchLink><br /><searchLink fieldCode="DE" term="%22Fish+waste%22">Fish waste</searchLink><br /><searchLink fieldCode="DE" term="%22Slaughtering%22">Slaughtering</searchLink><br /><searchLink fieldCode="DE" term="%22Fruit+processing+plants%22">Fruit processing plants</searchLink><br /><searchLink fieldCode="DE" term="%22Vegetable+processing+plants%22">Vegetable processing plants</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The effect of fish waste (FW), abattoir wastewater (AW) and waste activated sludge (WAS) addition as co-substrates on the fruit and vegetable waste (FVW) anaerobic digestion performance was investigated under mesophilic conditions using four anaerobic sequencing batch reactors (ASBR) with the aim of finding the better co-substrate for the enhanced performance of co-digestion. The reactors were operated at an organic loading rate of 2.46–2.51g volatile solids (VS)l−1 d−1, of which approximately 90% were from FVW, and a hydraulic retention time of 10 days. It was observed that AW and WAS additions with a ratio of 10% VS enhanced biogas yield by 51.5% and 43.8% and total volatile solids removal by 10% and 11.7%, respectively. However FW addition led to improvement of the process stability, as indicated by the low VFAs/Alkalinity ratio of 0.28, and permitted anaerobic digestion of FVW without chemical alkali addition. Despite a considerable decrease in the C/N ratio from 34.2 to 27.6, the addition of FW slightly improved the gas production yield (8.1%) compared to anaerobic digestion of FVW alone. A C/N ratio between 22 and 25 seemed to be better for anaerobic co-digestion of FVW with its co-substrates. The most significant factor for enhanced FVW digestion performance was the improved organic nitrogen content provided by the additional wastes. Consequently, the occurrence of an imbalance between the different groups of anaerobic bacteria which may take place in unstable anaerobic digestion of FVW could be prevented. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Environmental Management is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.jenvman.2008.12.002
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 6
        StartPage: 1844
    Subjects:
      – SubjectFull: Waste treatment
        Type: general
      – SubjectFull: Anaerobic digestion
        Type: general
      – SubjectFull: Sequencing batch reactor process
        Type: general
      – SubjectFull: Sludge bulking
        Type: general
      – SubjectFull: Performance evaluation
        Type: general
      – SubjectFull: Fish waste
        Type: general
      – SubjectFull: Slaughtering
        Type: general
      – SubjectFull: Fruit processing plants
        Type: general
      – SubjectFull: Vegetable processing plants
        Type: general
    Titles:
      – TitleFull: Improvement of fruit and vegetable waste anaerobic digestion performance and stability with co-substrates addition
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            NameFull: Ben Romdan, E.
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              Text: Apr2009
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              Y: 2009
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              Value: 90
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