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Biological Treatment

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A Srinivasan – 1st expert on this subject based on the ideXlab platform

  • Biological Treatment processes for fish processing wastewater – A review
    Bioresource Technology, 2010
    Co-Authors: Pankaj Chowdhury, T Viraraghavan, A Srinivasan

    Abstract:

    Water consumption in a fish-processing industry and high-strength wastewater from such an industry are of great concern world-wide. Liquid effluent regulations are becoming more stringent day by day. Biological Treatment is the best option for such a wastewater. Anaerobic processes such as upflow anaerobic sludge blanket (UASB) reactor, anaerobic filter (AF) and anaerobic fluidized bed (AFB) reactor can achieve high (80-90%) organics removal and produce biogas. Aerobic processes such as activated sludge, rotating Biological contactor, trickling filter and lagoons are also suitable for organics removal. Anaerobic digestion followed by an aerobic process is an optimal process option for fish processing wastewater Treatment. © 2009 Elsevier Ltd. All rights reserved.

  • Biological Treatment processes for fish processing wastewater a review
    Bioresource Technology, 2010
    Co-Authors: Pankaj Chowdhury, T Viraraghavan, A Srinivasan

    Abstract:

    Water consumption in a fish-processing industry and high-strength wastewater from such an industry are of great concern world-wide. Liquid effluent regulations are becoming more stringent day by day. Biological Treatment is the best option for such a wastewater. Anaerobic processes such as upflow anaerobic sludge blanket (UASB) reactor, anaerobic filter (AF) and anaerobic fluidized bed (AFB) reactor can achieve high (80-90%) organics removal and produce biogas. Aerobic processes such as activated sludge, rotating Biological contactor, trickling filter and lagoons are also suitable for organics removal. Anaerobic digestion followed by an aerobic process is an optimal process option for fish processing wastewater Treatment.

Pankaj Chowdhury – 2nd expert on this subject based on the ideXlab platform

  • Biological Treatment processes for fish processing wastewater – A review
    Bioresource Technology, 2010
    Co-Authors: Pankaj Chowdhury, T Viraraghavan, A Srinivasan

    Abstract:

    Water consumption in a fish-processing industry and high-strength wastewater from such an industry are of great concern world-wide. Liquid effluent regulations are becoming more stringent day by day. Biological Treatment is the best option for such a wastewater. Anaerobic processes such as upflow anaerobic sludge blanket (UASB) reactor, anaerobic filter (AF) and anaerobic fluidized bed (AFB) reactor can achieve high (80-90%) organics removal and produce biogas. Aerobic processes such as activated sludge, rotating Biological contactor, trickling filter and lagoons are also suitable for organics removal. Anaerobic digestion followed by an aerobic process is an optimal process option for fish processing wastewater Treatment. © 2009 Elsevier Ltd. All rights reserved.

  • Biological Treatment processes for fish processing wastewater a review
    Bioresource Technology, 2010
    Co-Authors: Pankaj Chowdhury, T Viraraghavan, A Srinivasan

    Abstract:

    Water consumption in a fish-processing industry and high-strength wastewater from such an industry are of great concern world-wide. Liquid effluent regulations are becoming more stringent day by day. Biological Treatment is the best option for such a wastewater. Anaerobic processes such as upflow anaerobic sludge blanket (UASB) reactor, anaerobic filter (AF) and anaerobic fluidized bed (AFB) reactor can achieve high (80-90%) organics removal and produce biogas. Aerobic processes such as activated sludge, rotating Biological contactor, trickling filter and lagoons are also suitable for organics removal. Anaerobic digestion followed by an aerobic process is an optimal process option for fish processing wastewater Treatment.

Fikret Kargi – 3rd expert on this subject based on the ideXlab platform

  • Adsorbent supplemented Biological Treatment of pre-treated landfill leachate by fed-batch operation.
    Bioresource Technology, 2004
    Co-Authors: Fikret Kargi, M. Yunus Pamukoglu

    Abstract:

    Abstract Biological Treatment of landfill leachate usually results in low COD removals because of high chemical oxygen demand (COD), high ammonium-N content and presence of toxic compounds. Coagulation–flocculation with lime addition and air stripping of ammonia were used as pre-Treatment in this study in order to improve Biological treatability of the leachate. Pre-treated leachate was subjected to adsorbent supplemented Biological Treatment in an aeration tank operated in fed-batch mode. COD and NH 4 -N removal performances of powdered activated carbon (PAC) and powdered zeolite (PZ) were compared during Biological Treatment. Adsorbent concentrations varied between 0 and 5 g l −1 . Percent COD and ammonium-N removals increased with increasing adsorbent concentrations. Percent COD removals with PAC addition were significantly higher than those obtained with the zeolite. However, zeolite performed better than the PAC in ammonium-N removal from the leachate. Nearly 87% and 77% COD removals were achieved with PAC and zeolite concentrations of 2 g l −1 , respectively. Ammonium-N removals were 30% and 40% with PAC and zeolite concentrations of 5 g l −1 , respectively at the end of 30 h of fed-batch operation.

  • Aerobic Biological Treatment of pre-treated landfill leachate by fed-batch operation
    Enzyme and Microbial Technology, 2003
    Co-Authors: Fikret Kargi, M. Yunus Pamukoglu

    Abstract:

    Abstract Landfill leachate obtained from the solid waste landfill area contained high chemical oxygen demand (COD) and ammonium ions which resulted in low COD and ammonium removals by direct Biological Treatment. COD and ammonium ion contents of the leachate were reduced to reasonable levels by chemical precipitation with lime and air stripping of ammonia. The pre-treated leachate was subjected to aerobic Biological Treatment in an aeration tank by fed-batch operation. The effects of the feed wastewater COD content and flow rate on COD and ammonium ions removal were investigated. Nearly 76% COD and 23% NH 4 -N removals were obtained after 30 h of operation with a flow rate of 0.21 l h −1 and the feed COD content of 7000 mg COD l −1 . COD removal efficiency decreased with increasing COD loading rates. A kinetic model for COD removal was developed and the kinetic constants were determined by using the experimental data.

  • Simultaneous adsorption and Biological Treatment of pre-treated landfill leachate by fed-batch operation
    Process Biochemistry, 2003
    Co-Authors: Fikret Kargi, M. Yunus Pamukoglu

    Abstract:

    Abstract Due to high chemical oxygen demand (COD), ammonium–N content and presence of toxic compounds such as heavy metals, direct Biological Treatment of landfill leachate results in low removal efficiencies. In order to improve Biological treatability of the leachate, coagulation–flocculation and air stripping of ammonia were used as pre-Treatment. Pre-treated leachate was treated Biologically using an aeration tank operated in fed-batch mode in the absence and presence of powdered activated carbon (PAC) as adsorbent. PAC addition improved COD removal significantly especially at concentrations above 0.5 g l −1 . However, improvements in COD removals were marginal for PAC concentrations above 2 g l −1 . Nearly 86% COD removal was achieved with 2 g l −1 PAC added Biological Treatment whereas, COD removals by only Biological oxidation and only PAC adsorption were nearly 74 and 38%, respectively at the end of 30 h of fed-batch operation. An empirical equation was developed to describe the contribution of adsorption over Biological Treatment as a function of PAC concentration.