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Air Scour

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Joaquim Comas – One of the best experts on this subject based on the ideXlab platform.

  • Optimized MBR for greywater reuse systems in hotel facilities
    Journal of Environmental Management, 2017
    Co-Authors: Nataša Atanasova, Montserrat Dalmau, Joaquim Comas, Manel Poch, Ignasi Rodríguez-roda, G. Buttiglieri

    Abstract:

    Greywater is an important alternative water source, particularly in semi-arid, touristic areas, where the biggest water demand is usually in the dry period. By using this source wisely, tourist facilities can substantially reduce the pressure to scarce water resources. In densely urbanized touristic areas, where space has high value, compact solutions such as MBR based greywater reuse systems appear very appropriate. This research focuses on technical and economical evaluation of such solution by implementing a pilot MBR to a hotel with separated grey water. The pilot was operated for 6 months, with thorough characterisation of the GW performed, its operation was monitored and its energy consumption was optimized by applying a control system for the Air Scour. Based on the pilot operation a design and economic model was set to estimate the feasibility (CAPEX, OPEX, payback period of investment) of appropriate scales of MBR based GW systems, including separation of GW, MBR technology, clean water storage and disinfection. The model takes into account water and energy prices in Spain and a planning period of 20 years. The results demonstrated an excellent performance in terms of effluent quality, while the energy demand for AirScour was reduced by up to 35.2%, compared to the manufacturer recommendations. Economical evaluation of the entire MBR based GW reuse system shows its feasibility for sizes already at 5 m3/day (60 PE). The payback period of the investment for hotels like the demonstration hotel, treating 30 m3/day is 3 years.

  • Development of an algorithm for AirScour optimization in membrane bioreactors
    IFAC Proceedings Volumes, 2016
    Co-Authors: Giuliana Ferrero, G. Buttiglieri, Joaquim Comas, Hèctor Monclús, S. Gabarrón, Ignasi Rodríguez-roda

    Abstract:

    Abstract Membrane Bioreactors are used in an increasing number of wastewater treatment facilities because of their compactness and efficiency in solid-liquid separation. In this paper the development of an AirScour control algorithm based upon short term and long term membranes permeability evolution is presented. An open loop calibration and partial validation was carried out in a semi-industrial scale pilot plant where manual changes in AirScour flow had been previously carried out. The control system was successfully tested in closed loop in an industrial scale pilot plant, defining a maximum daily AirScour decrease or increase of 6% of the AirScour recommended by membranes suppliers. A maximum AirScour saving of 20%, calculated in terms of Air flow saved, was achieved without interfering with the biological nutrient removal and without any apparent long term effect.

  • Managing Resources of a Limited Planet, Sixth Biennial Meeting, Leipzig, Germany
    , 2015
    Co-Authors: A. A. Voinov, Montserrat Dalmau, Hèctor Monclús, S. Lange, D. Bankamp, Ivan Brun, Jordi Moreno, Joaquim Comas

    Abstract:

    Upgrading a decision support system for AirScour control in flat sheet membrane bioreactor

Ignasi Rodriguezroda – One of the best experts on this subject based on the ideXlab platform.

  • development of a control algorithm for Air Scour reduction in membrane bioreactors for wastewater treatment
    Journal of Chemical Technology & Biotechnology, 2011
    Co-Authors: Giuliana Ferrero, G. Buttiglieri, Joaquim Comas, Hèctor Monclús, S. Gabarrón, Ignasi Rodriguezroda

    Abstract:

    BACKGROUND: Membrane bioreactors are used in an increasing number of wastewater treatment facilities because of their compactness and efficiency in solid-liquid separation, but energy requirements are still higher than other competitive technologies such as conventional activated sludge. RESULTS: In this paper the development of an AirScour control algorithm based on short-term and long-term membrane permeability evolution is presented. An open loop calibration and partial validation was carried out in a semi-industrial scale pilot plant where manual changes in AirScour flow had been previously carried out. The control system was successfully tested in closed loop in an industrial scale pilot plant, defining a maximum daily AirScour decrease or increase of 6% of the AirScour recommended by membranes suppliers. An average AirScour saving of 13% and a maximum of 20%, calculated in terms of Air flow saved, were achieved during the validation test without any apparent long-term effect on membrane permeability. CONCLUSION: It was proven that the AirScour control system is an important tool capable of reducing operational costs in MBR systems.

G. Buttiglieri – One of the best experts on this subject based on the ideXlab platform.

  • Optimized MBR for greywater reuse systems in hotel facilities
    Journal of Environmental Management, 2017
    Co-Authors: Nataša Atanasova, Montserrat Dalmau, Joaquim Comas, Manel Poch, Ignasi Rodríguez-roda, G. Buttiglieri

    Abstract:

    Greywater is an important alternative water source, particularly in semi-arid, touristic areas, where the biggest water demand is usually in the dry period. By using this source wisely, tourist facilities can substantially reduce the pressure to scarce water resources. In densely urbanized touristic areas, where space has high value, compact solutions such as MBR based greywater reuse systems appear very appropriate. This research focuses on technical and economical evaluation of such solution by implementing a pilot MBR to a hotel with separated grey water. The pilot was operated for 6 months, with thorough characterisation of the GW performed, its operation was monitored and its energy consumption was optimized by applying a control system for the Air Scour. Based on the pilot operation a design and economic model was set to estimate the feasibility (CAPEX, OPEX, payback period of investment) of appropriate scales of MBR based GW systems, including separation of GW, MBR technology, clean water storage and disinfection. The model takes into account water and energy prices in Spain and a planning period of 20 years. The results demonstrated an excellent performance in terms of effluent quality, while the energy demand for AirScour was reduced by up to 35.2%, compared to the manufacturer recommendations. Economical evaluation of the entire MBR based GW reuse system shows its feasibility for sizes already at 5 m3/day (60 PE). The payback period of the investment for hotels like the demonstration hotel, treating 30 m3/day is 3 years.

  • Development of an algorithm for AirScour optimization in membrane bioreactors
    IFAC Proceedings Volumes, 2016
    Co-Authors: Giuliana Ferrero, G. Buttiglieri, Joaquim Comas, Hèctor Monclús, S. Gabarrón, Ignasi Rodríguez-roda

    Abstract:

    Abstract Membrane Bioreactors are used in an increasing number of wastewater treatment facilities because of their compactness and efficiency in solid-liquid separation. In this paper the development of an AirScour control algorithm based upon short term and long term membranes permeability evolution is presented. An open loop calibration and partial validation was carried out in a semi-industrial scale pilot plant where manual changes in AirScour flow had been previously carried out. The control system was successfully tested in closed loop in an industrial scale pilot plant, defining a maximum daily AirScour decrease or increase of 6% of the AirScour recommended by membranes suppliers. A maximum AirScour saving of 20%, calculated in terms of Air flow saved, was achieved without interfering with the biological nutrient removal and without any apparent long term effect.

  • development of a control algorithm for Air Scour reduction in membrane bioreactors for wastewater treatment
    Journal of Chemical Technology & Biotechnology, 2011
    Co-Authors: Giuliana Ferrero, G. Buttiglieri, Joaquim Comas, Hèctor Monclús, S. Gabarrón, Ignasi Rodriguezroda

    Abstract:

    BACKGROUND: Membrane bioreactors are used in an increasing number of wastewater treatment facilities because of their compactness and efficiency in solid-liquid separation, but energy requirements are still higher than other competitive technologies such as conventional activated sludge. RESULTS: In this paper the development of an AirScour control algorithm based on short-term and long-term membrane permeability evolution is presented. An open loop calibration and partial validation was carried out in a semi-industrial scale pilot plant where manual changes in AirScour flow had been previously carried out. The control system was successfully tested in closed loop in an industrial scale pilot plant, defining a maximum daily AirScour decrease or increase of 6% of the AirScour recommended by membranes suppliers. An average AirScour saving of 13% and a maximum of 20%, calculated in terms of Air flow saved, were achieved during the validation test without any apparent long-term effect on membrane permeability. CONCLUSION: It was proven that the AirScour control system is an important tool capable of reducing operational costs in MBR systems.