The Experts below are selected from a list of 6021 Experts worldwide ranked by ideXlab platform

Weihong Xing - One of the best experts on this subject based on the ideXlab platform.

  • Tight Ultrafiltration Ceramic Membrane for Separation of Dyes and Mixed Salts (both NaCl/Na2SO4) in Textile Wastewater Treatment
    Industrial & Engineering Chemistry Research, 2017
    Co-Authors: Pengli Chen, Ming Zhou, Zhaoxiang Zhong, Feng Zhang, Weihong Xing
    Abstract:

    Commercial nanofiltration (NF) membranes have been used to separate dyes and salts in industry; however, NF membrane’s high rejection to divalent salts (i.e., Na2SO4) leads to a reduction of salt recovery. In this study, a tight ultrafiltration (t-UF) ceramic membrane (MWCO 8800 Da) is proposed to fractionate dyes and mixed salts (NaCl/Na2SO4) for Textile Wastewater Treatment. Performance of the t-UF ceramic membrane and DK polymeric membrane (from GE) has been compared regarding to permeability, retention of reactive dyes, and permeation of salts. The t-UF ceramic membrane presents better permeability, competitive rejection of dye molecules (>98%), and reduced rejection of NaCl (

  • tight ultrafiltration ceramic membrane for separation of dyes and mixed salts both nacl na2so4 in Textile Wastewater Treatment
    Industrial & Engineering Chemistry Research, 2017
    Co-Authors: Pengli Chen, Ming Zhou, Zhaoxiang Zhong, Feng Zhang, Weihong Xing
    Abstract:

    Commercial nanofiltration (NF) membranes have been used to separate dyes and salts in industry; however, NF membrane’s high rejection to divalent salts (i.e., Na2SO4) leads to a reduction of salt recovery. In this study, a tight ultrafiltration (t-UF) ceramic membrane (MWCO 8800 Da) is proposed to fractionate dyes and mixed salts (NaCl/Na2SO4) for Textile Wastewater Treatment. Performance of the t-UF ceramic membrane and DK polymeric membrane (from GE) has been compared regarding to permeability, retention of reactive dyes, and permeation of salts. The t-UF ceramic membrane presents better permeability, competitive rejection of dye molecules (>98%), and reduced rejection of NaCl (<10%) and Na2SO4 (<30%) in comparison with DK membrane; the pure water permeability of t-UF membrane is at least 6 times that of DK membrane. In particular, the operation parameters (TMP, temperature, and pH) and solution environment (concentration and charges) have been intensively evaluated for dye/dual-salts separation efficie...

Adriana Maria Lotito - One of the best experts on this subject based on the ideXlab platform.

  • Textile Wastewater Treatment aerobic granular sludge vs activated sludge systems
    Water Research, 2014
    Co-Authors: Adriana Maria Lotito, Claudio Di Iaconi, Marco De Sanctis, Giovanni Ergna
    Abstract:

    Abstract Textile effluents are characterised by high content of recalcitrant compounds and are often discharged (together with municipal Wastewater to increase their treatability) into centralized Wastewater Treatment plants with a complex Treatment scheme. This paper reports the results achieved adopting a granular sludge system (sequencing batch biofilter granular reactor – SBBGR) to treat mixed municipal-Textile Wastewater. Thanks to high average removals in SBBGR (82.1% chemical oxygen demand, 94.7% total suspended solids, 87.5% total Kjeldahl nitrogen, 77.1% surfactants), the Italian limits for discharge into a water receiver can be complied with the biological stage alone. The comparison with the performance of the centralized plant treating the same Wastewater has showed that SBBGR system is able to produce an effluent of comparable quality with a simpler Treatment scheme, a much lower hydraulic residence time (11 h against 30 h) and a lower sludge production.

  • Is a sequencing batch biofilter granular reactor suitable for Textile Wastewater Treatment
    Water Science and Technology, 2012
    Co-Authors: Adriana Maria Lotito, Umberto Fratino, Annalisa Mancini, Giovanni Bergna, Claudio Di Iaconi
    Abstract:

    The Textile industry releases highly polluted and complex Wastewaters, which are difficult to treat and require numerous Treatment steps. Innovative technologies for on-site Treatment at each factory would permit cost reduction. For this reason, we ran a laboratory-scale study to assess the suitability of a sequencing batch biofilter granular reactor (SBBGR) for Textile Wastewater Treatment, testing four different types of Wastewater. Results demonstrate that Wastewater characteristics greatly affect the reactor efficiency. Hence, a pre-study is advisable to define the best operational conditions and the maximum Treatment capability for the Wastewater under analysis. Nevertheless, SBBGR is a valuable biological Treatment, effective in the reduction of pollutant load with stable performances despite the variability in Wastewater composition. Tests with ozone integration have demonstrated that it is possible to dose small quantities of ozone to obtain an effluent suitable for direct discharge. However, a dynamic ozone dosage should be used to optimize the process as the correct ozone dose strongly depends on the Wastewater composition.

  • Sequencing batch biofilter granular reactor for Textile Wastewater Treatment.
    New Biotechnology, 2011
    Co-Authors: Adriana Maria Lotito, Claudio Di Iaconi, Umberto Fratino, Annalisa Mancini, Giovanni Bergna
    Abstract:

    Textile Wastewater is difficult to treat as it usually contains considerable amounts of different pollutants, which are often recalcitrant, toxic and inhibitory. Therefore, complex Treatment schemes based on the sequence of various steps are usually required for an effective Treatment. This explains why Textile effluents are often treated in centralized plants and sometimes mixed with municipal Wastewater. The adoption of new technologies for on-site Treatment, instead, would be optimal, deeply reducing Treatment costs. An innovative technology exhibiting several characteristics appropriate for the attainment of such a goal is sequencing batch biofilter granular reactor (SBBGR). To assess the suitability of this technology, two lab-scale reactors were operated, treating mixed municipal-Textile Wastewater and a pure Textile effluent, respectively. Results have demonstrated that mixed Wastewater can be successfully treated with very low hydraulic retention times (less than 10 hours). Furthermore, SBBGR shows to be an effective pre-Treatment for Textile Wastewater for discharge into sewer systems. The economic evaluation of the process showed operative costs of 0.10 and 0.19 € per m3 of mixed Wastewater and Textile Wastewater, respectively.

Pengli Chen - One of the best experts on this subject based on the ideXlab platform.

  • Tight Ultrafiltration Ceramic Membrane for Separation of Dyes and Mixed Salts (both NaCl/Na2SO4) in Textile Wastewater Treatment
    Industrial & Engineering Chemistry Research, 2017
    Co-Authors: Pengli Chen, Ming Zhou, Zhaoxiang Zhong, Feng Zhang, Weihong Xing
    Abstract:

    Commercial nanofiltration (NF) membranes have been used to separate dyes and salts in industry; however, NF membrane’s high rejection to divalent salts (i.e., Na2SO4) leads to a reduction of salt recovery. In this study, a tight ultrafiltration (t-UF) ceramic membrane (MWCO 8800 Da) is proposed to fractionate dyes and mixed salts (NaCl/Na2SO4) for Textile Wastewater Treatment. Performance of the t-UF ceramic membrane and DK polymeric membrane (from GE) has been compared regarding to permeability, retention of reactive dyes, and permeation of salts. The t-UF ceramic membrane presents better permeability, competitive rejection of dye molecules (>98%), and reduced rejection of NaCl (

  • tight ultrafiltration ceramic membrane for separation of dyes and mixed salts both nacl na2so4 in Textile Wastewater Treatment
    Industrial & Engineering Chemistry Research, 2017
    Co-Authors: Pengli Chen, Ming Zhou, Zhaoxiang Zhong, Feng Zhang, Weihong Xing
    Abstract:

    Commercial nanofiltration (NF) membranes have been used to separate dyes and salts in industry; however, NF membrane’s high rejection to divalent salts (i.e., Na2SO4) leads to a reduction of salt recovery. In this study, a tight ultrafiltration (t-UF) ceramic membrane (MWCO 8800 Da) is proposed to fractionate dyes and mixed salts (NaCl/Na2SO4) for Textile Wastewater Treatment. Performance of the t-UF ceramic membrane and DK polymeric membrane (from GE) has been compared regarding to permeability, retention of reactive dyes, and permeation of salts. The t-UF ceramic membrane presents better permeability, competitive rejection of dye molecules (>98%), and reduced rejection of NaCl (<10%) and Na2SO4 (<30%) in comparison with DK membrane; the pure water permeability of t-UF membrane is at least 6 times that of DK membrane. In particular, the operation parameters (TMP, temperature, and pH) and solution environment (concentration and charges) have been intensively evaluated for dye/dual-salts separation efficie...

Xiaoyu Yang - One of the best experts on this subject based on the ideXlab platform.

  • preparation and performance of a novel starch based inorganic organic composite coagulant for Textile Wastewater Treatment
    Separation and Purification Technology, 2019
    Co-Authors: Lyu Zhou, Hongjie Zhou, Xiaoyu Yang
    Abstract:

    Abstract Inorganic/organic composite coagulants have received wide attention in recent years due to their outstanding properties in Wastewater Treatment. However, non-biodegradable synthetic polymers are largely applied as the organic components of these composites, leading to negative environmental impacts. To acquire efficient composite coagulant with less environmental risks, a novel inorganic/natural polymer composite PAFC-Starch-g-p(AM-DMDAAC) (polyaluminum ferric chloride-starch graft copolymer with acrylamide and dimethyl diallyl ammonium chloride) was prepared, and applied for Textile Wastewater Treatment. The results showed that PAFC-Starch-g-p(AM-DMDAAC) exhibited higher and more stable dye removal efficiencies than other prepared composite coagulants. For synthetic Textile Wastewater Treatment, PAFC-Starch-g-p(AM-DMDAAC) could reduce the chemical dosage by more than 50% compared with conventional coagulation-flocculation process. The effects of Wastewater pH, conductivity and temperature on the coagulation performance were studied. High-temperature accelerated storage test proved that PAFC-Starch-g-p(AM-DMDAAC) had a strong storage stability. PAFC-Starch-g-p(AM-DMDAAC) is an eco-friendly composite coagulant with excellent performances and broad utilization range, showing promising application prospects.

  • Preparation and performance of a novel starch-based inorganic/organic composite coagulant for Textile Wastewater Treatment
    Separation and Purification Technology, 2019
    Co-Authors: Lyu Zhou, Hongjie Zhou, Xiaoyu Yang
    Abstract:

    Abstract Inorganic/organic composite coagulants have received wide attention in recent years due to their outstanding properties in Wastewater Treatment. However, non-biodegradable synthetic polymers are largely applied as the organic components of these composites, leading to negative environmental impacts. To acquire efficient composite coagulant with less environmental risks, a novel inorganic/natural polymer composite PAFC-Starch-g-p(AM-DMDAAC) (polyaluminum ferric chloride-starch graft copolymer with acrylamide and dimethyl diallyl ammonium chloride) was prepared, and applied for Textile Wastewater Treatment. The results showed that PAFC-Starch-g-p(AM-DMDAAC) exhibited higher and more stable dye removal efficiencies than other prepared composite coagulants. For synthetic Textile Wastewater Treatment, PAFC-Starch-g-p(AM-DMDAAC) could reduce the chemical dosage by more than 50% compared with conventional coagulation-flocculation process. The effects of Wastewater pH, conductivity and temperature on the coagulation performance were studied. High-temperature accelerated storage test proved that PAFC-Starch-g-p(AM-DMDAAC) had a strong storage stability. PAFC-Starch-g-p(AM-DMDAAC) is an eco-friendly composite coagulant with excellent performances and broad utilization range, showing promising application prospects.

Claudio Di Iaconi - One of the best experts on this subject based on the ideXlab platform.

  • Textile Wastewater Treatment aerobic granular sludge vs activated sludge systems
    Water Research, 2014
    Co-Authors: Adriana Maria Lotito, Claudio Di Iaconi, Marco De Sanctis, Giovanni Ergna
    Abstract:

    Abstract Textile effluents are characterised by high content of recalcitrant compounds and are often discharged (together with municipal Wastewater to increase their treatability) into centralized Wastewater Treatment plants with a complex Treatment scheme. This paper reports the results achieved adopting a granular sludge system (sequencing batch biofilter granular reactor – SBBGR) to treat mixed municipal-Textile Wastewater. Thanks to high average removals in SBBGR (82.1% chemical oxygen demand, 94.7% total suspended solids, 87.5% total Kjeldahl nitrogen, 77.1% surfactants), the Italian limits for discharge into a water receiver can be complied with the biological stage alone. The comparison with the performance of the centralized plant treating the same Wastewater has showed that SBBGR system is able to produce an effluent of comparable quality with a simpler Treatment scheme, a much lower hydraulic residence time (11 h against 30 h) and a lower sludge production.

  • Is a sequencing batch biofilter granular reactor suitable for Textile Wastewater Treatment
    Water Science and Technology, 2012
    Co-Authors: Adriana Maria Lotito, Umberto Fratino, Annalisa Mancini, Giovanni Bergna, Claudio Di Iaconi
    Abstract:

    The Textile industry releases highly polluted and complex Wastewaters, which are difficult to treat and require numerous Treatment steps. Innovative technologies for on-site Treatment at each factory would permit cost reduction. For this reason, we ran a laboratory-scale study to assess the suitability of a sequencing batch biofilter granular reactor (SBBGR) for Textile Wastewater Treatment, testing four different types of Wastewater. Results demonstrate that Wastewater characteristics greatly affect the reactor efficiency. Hence, a pre-study is advisable to define the best operational conditions and the maximum Treatment capability for the Wastewater under analysis. Nevertheless, SBBGR is a valuable biological Treatment, effective in the reduction of pollutant load with stable performances despite the variability in Wastewater composition. Tests with ozone integration have demonstrated that it is possible to dose small quantities of ozone to obtain an effluent suitable for direct discharge. However, a dynamic ozone dosage should be used to optimize the process as the correct ozone dose strongly depends on the Wastewater composition.

  • Sequencing batch biofilter granular reactor for Textile Wastewater Treatment.
    New Biotechnology, 2011
    Co-Authors: Adriana Maria Lotito, Claudio Di Iaconi, Umberto Fratino, Annalisa Mancini, Giovanni Bergna
    Abstract:

    Textile Wastewater is difficult to treat as it usually contains considerable amounts of different pollutants, which are often recalcitrant, toxic and inhibitory. Therefore, complex Treatment schemes based on the sequence of various steps are usually required for an effective Treatment. This explains why Textile effluents are often treated in centralized plants and sometimes mixed with municipal Wastewater. The adoption of new technologies for on-site Treatment, instead, would be optimal, deeply reducing Treatment costs. An innovative technology exhibiting several characteristics appropriate for the attainment of such a goal is sequencing batch biofilter granular reactor (SBBGR). To assess the suitability of this technology, two lab-scale reactors were operated, treating mixed municipal-Textile Wastewater and a pure Textile effluent, respectively. Results have demonstrated that mixed Wastewater can be successfully treated with very low hydraulic retention times (less than 10 hours). Furthermore, SBBGR shows to be an effective pre-Treatment for Textile Wastewater for discharge into sewer systems. The economic evaluation of the process showed operative costs of 0.10 and 0.19 € per m3 of mixed Wastewater and Textile Wastewater, respectively.