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Anaerobic Filter

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Hana Gannoun – One of the best experts on this subject based on the ideXlab platform.

  • microbial monitoring by molecular tools of an upflow Anaerobic Filter treating abattoir wastewaters
    Bioresource Technology, 2013
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Ilhem Omri, Linda Jabari, Marie-laure Fardeau, Hassib Bouallagui, Jean-jacques Godon, Moktar Hamdi

    Abstract:

    Abstract The performance of Anaerobic digestion of abattoir wastewaters (AW) in an upflow Anaerobic Filter (UAF) was investigated under mesophilic (37 °C) and thermophilic (55 °C) conditions. The effects of increasing temperature on the performance of the UAF and on the dynamics of the microbial community of the Anaerobic sludge were studied. The results showed that chemical oxygen demand (COD) removal efficiency of 90% was achieved for organic loading rates (OLRs) up to 4.5 g COD L −1  d −1 in mesophilic conditions, while in thermophilic conditions, the highest OLRs of 9 g COD L −1  d −1 led to the efficiency of 72%. The use of molecular and microbiological methods to recover microbial populations involved in this process showed that fermentative bacteria were the prominent members of the sludge microbial community. Three novel strains were identified as Macellibacteroides fermentans , Desulfotomaculum peckii and Defluviitalea saccharophila .

  • Microbial monitoring by molecular tools of an upflow Anaerobic Filter treating abattoir wastewaters
    Bioresource Technology, 2013
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Ilhem Omri, Linda Jabari, Marie-laure Fardeau, Hassib Bouallagui, Jean-jacques Godon, Moktar Hamdi

    Abstract:

    The performance of Anaerobic digestion of abattoir wastewaters (AW) in an upflow Anaerobic Filter (UAF) was investigated under mesophilic (37 degrees C) and thermophilic (55 degrees C) conditions. The effects of increasing temperature on the performance of the UAF and on the dynamics of the microbial community of the Anaerobic sludge were studied. The results showed that chemical oxygen demand (COD) removal efficiency of 90% was achieved for organic loading rates (OLRs) up to 4.5 g COD L-1 d(-1) in mesophilic conditions, while in thermophilic conditions, the highest OLRs of 9 g COD L-1 d(-1) led to the efficiency of 72%. The use of molecular and microbiological methods to recover microbial populations involved in this process showed that fermentative bacteria were the prominent members of the sludge microbial community. Three novel strains were identified as Macellibacteroides fermentans, Desulfotomaculum peckii and Defluviitalea saccharophila.

  • ecological clarification of cheese whey prior to Anaerobic digestion in upflow Anaerobic Filter
    Bioresource Technology, 2008
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Hassib Bouallagui, Youssef Touhami, Moktar Hamdi

    Abstract:

    Abstract Anaerobic digestion of cheese whey wastewaters (CW) was investigated in a system consisting of an ecological pretreatment followed by upflow Anaerobic Filter (UAF). The pretreatment was conducted to solve the inhibition problems during Anaerobic treatment of CW caused by the amounts of fats, proteins and carbohydrates and to avoid the major problems of clogging in the reactor. The optimized ecological pretreatment of diluted CW induce removal yields of 50% of chemical oxygen demand (COD) and 60% of total suspended solids (TSS) after acidification by Lactobacillus paracasei at 32 °C during 20 h and neutralization with lime. The pretreated CW was used to feed UAF (35 °C). The effects of organic loading rate (OLR) and hydraulic retention time (HRT) on the pretreated CW Anaerobic degradation were examined. The average total COD removals achieved was 80–90%. The performance of the reactor was depressed by increasing the COD concentration to 20 g/l (OLR = 4 g COD/l d) and the COD removal efficiency was reduced to 72%. Significant methane yield (280 l/kg COD removal) was obtained at an HRT of 2 days.

Moktar Hamdi – One of the best experts on this subject based on the ideXlab platform.

  • microbial monitoring by molecular tools of an upflow Anaerobic Filter treating abattoir wastewaters
    Bioresource Technology, 2013
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Ilhem Omri, Linda Jabari, Marie-laure Fardeau, Hassib Bouallagui, Jean-jacques Godon, Moktar Hamdi

    Abstract:

    Abstract The performance of Anaerobic digestion of abattoir wastewaters (AW) in an upflow Anaerobic Filter (UAF) was investigated under mesophilic (37 °C) and thermophilic (55 °C) conditions. The effects of increasing temperature on the performance of the UAF and on the dynamics of the microbial community of the Anaerobic sludge were studied. The results showed that chemical oxygen demand (COD) removal efficiency of 90% was achieved for organic loading rates (OLRs) up to 4.5 g COD L −1  d −1 in mesophilic conditions, while in thermophilic conditions, the highest OLRs of 9 g COD L −1  d −1 led to the efficiency of 72%. The use of molecular and microbiological methods to recover microbial populations involved in this process showed that fermentative bacteria were the prominent members of the sludge microbial community. Three novel strains were identified as Macellibacteroides fermentans , Desulfotomaculum peckii and Defluviitalea saccharophila .

  • Microbial monitoring by molecular tools of an upflow Anaerobic Filter treating abattoir wastewaters
    Bioresource Technology, 2013
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Ilhem Omri, Linda Jabari, Marie-laure Fardeau, Hassib Bouallagui, Jean-jacques Godon, Moktar Hamdi

    Abstract:

    The performance of Anaerobic digestion of abattoir wastewaters (AW) in an upflow Anaerobic Filter (UAF) was investigated under mesophilic (37 degrees C) and thermophilic (55 degrees C) conditions. The effects of increasing temperature on the performance of the UAF and on the dynamics of the microbial community of the Anaerobic sludge were studied. The results showed that chemical oxygen demand (COD) removal efficiency of 90% was achieved for organic loading rates (OLRs) up to 4.5 g COD L-1 d(-1) in mesophilic conditions, while in thermophilic conditions, the highest OLRs of 9 g COD L-1 d(-1) led to the efficiency of 72%. The use of molecular and microbiological methods to recover microbial populations involved in this process showed that fermentative bacteria were the prominent members of the sludge microbial community. Three novel strains were identified as Macellibacteroides fermentans, Desulfotomaculum peckii and Defluviitalea saccharophila.

  • ecological clarification of cheese whey prior to Anaerobic digestion in upflow Anaerobic Filter
    Bioresource Technology, 2008
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Hassib Bouallagui, Youssef Touhami, Moktar Hamdi

    Abstract:

    Abstract Anaerobic digestion of cheese whey wastewaters (CW) was investigated in a system consisting of an ecological pretreatment followed by upflow Anaerobic Filter (UAF). The pretreatment was conducted to solve the inhibition problems during Anaerobic treatment of CW caused by the amounts of fats, proteins and carbohydrates and to avoid the major problems of clogging in the reactor. The optimized ecological pretreatment of diluted CW induce removal yields of 50% of chemical oxygen demand (COD) and 60% of total suspended solids (TSS) after acidification by Lactobacillus paracasei at 32 °C during 20 h and neutralization with lime. The pretreated CW was used to feed UAF (35 °C). The effects of organic loading rate (OLR) and hydraulic retention time (HRT) on the pretreated CW Anaerobic degradation were examined. The average total COD removals achieved was 80–90%. The performance of the reactor was depressed by increasing the COD concentration to 20 g/l (OLR = 4 g COD/l d) and the COD removal efficiency was reduced to 72%. Significant methane yield (280 l/kg COD removal) was obtained at an HRT of 2 days.

Hassib Bouallagui – One of the best experts on this subject based on the ideXlab platform.

  • microbial monitoring by molecular tools of an upflow Anaerobic Filter treating abattoir wastewaters
    Bioresource Technology, 2013
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Ilhem Omri, Linda Jabari, Marie-laure Fardeau, Hassib Bouallagui, Jean-jacques Godon, Moktar Hamdi

    Abstract:

    Abstract The performance of Anaerobic digestion of abattoir wastewaters (AW) in an upflow Anaerobic Filter (UAF) was investigated under mesophilic (37 °C) and thermophilic (55 °C) conditions. The effects of increasing temperature on the performance of the UAF and on the dynamics of the microbial community of the Anaerobic sludge were studied. The results showed that chemical oxygen demand (COD) removal efficiency of 90% was achieved for organic loading rates (OLRs) up to 4.5 g COD L −1  d −1 in mesophilic conditions, while in thermophilic conditions, the highest OLRs of 9 g COD L −1  d −1 led to the efficiency of 72%. The use of molecular and microbiological methods to recover microbial populations involved in this process showed that fermentative bacteria were the prominent members of the sludge microbial community. Three novel strains were identified as Macellibacteroides fermentans , Desulfotomaculum peckii and Defluviitalea saccharophila .

  • Microbial monitoring by molecular tools of an upflow Anaerobic Filter treating abattoir wastewaters
    Bioresource Technology, 2013
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Ilhem Omri, Linda Jabari, Marie-laure Fardeau, Hassib Bouallagui, Jean-jacques Godon, Moktar Hamdi

    Abstract:

    The performance of Anaerobic digestion of abattoir wastewaters (AW) in an upflow Anaerobic Filter (UAF) was investigated under mesophilic (37 degrees C) and thermophilic (55 degrees C) conditions. The effects of increasing temperature on the performance of the UAF and on the dynamics of the microbial community of the Anaerobic sludge were studied. The results showed that chemical oxygen demand (COD) removal efficiency of 90% was achieved for organic loading rates (OLRs) up to 4.5 g COD L-1 d(-1) in mesophilic conditions, while in thermophilic conditions, the highest OLRs of 9 g COD L-1 d(-1) led to the efficiency of 72%. The use of molecular and microbiological methods to recover microbial populations involved in this process showed that fermentative bacteria were the prominent members of the sludge microbial community. Three novel strains were identified as Macellibacteroides fermentans, Desulfotomaculum peckii and Defluviitalea saccharophila.

  • ecological clarification of cheese whey prior to Anaerobic digestion in upflow Anaerobic Filter
    Bioresource Technology, 2008
    Co-Authors: Hana Gannoun, Eltaief Khelifi, Hassib Bouallagui, Youssef Touhami, Moktar Hamdi

    Abstract:

    Abstract Anaerobic digestion of cheese whey wastewaters (CW) was investigated in a system consisting of an ecological pretreatment followed by upflow Anaerobic Filter (UAF). The pretreatment was conducted to solve the inhibition problems during Anaerobic treatment of CW caused by the amounts of fats, proteins and carbohydrates and to avoid the major problems of clogging in the reactor. The optimized ecological pretreatment of diluted CW induce removal yields of 50% of chemical oxygen demand (COD) and 60% of total suspended solids (TSS) after acidification by Lactobacillus paracasei at 32 °C during 20 h and neutralization with lime. The pretreated CW was used to feed UAF (35 °C). The effects of organic loading rate (OLR) and hydraulic retention time (HRT) on the pretreated CW Anaerobic degradation were examined. The average total COD removals achieved was 80–90%. The performance of the reactor was depressed by increasing the COD concentration to 20 g/l (OLR = 4 g COD/l d) and the COD removal efficiency was reduced to 72%. Significant methane yield (280 l/kg COD removal) was obtained at an HRT of 2 days.