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Nanping Xu - One of the best experts on this subject based on the ideXlab platform.

  • Ceramic Membrane filtration as seawater RO pre-treatment: influencing factors on the Ceramic Membrane flux and quality
    Desalination and Water Treatment, 2013
    Co-Authors: Wenbo Peng, Weihong Xing, Nanping Xu
    Abstract:

    Abstract Membrane filtration has been accepted as the preferred pre-treatment method in reverse osmosis (RO) processes in recent years. In this paper, a laboratory-scale Ceramic Membranes device, which has a potential to be used as pre-treatment for RO desalination, was employed to investigate the performance of Ceramic Membranes with different pore sizes and under different conditions. Ceramic Membranes with pore sizes of 50, 200, 500, and 800 nm were tested, and the effects of pore size, transMembrane pressure (TMP), coagulation method, and NaClO addition on the permeate flux and the permeate quality of Ceramic Membranes were studied. The results show that the pore size has an insignificant effect on the permeate flux of Ceramic Membranes but the coagulation method has a significant effect. Pore size and NaClO addition did not have significant effects on the turbidity of the Ceramic Membrane permeate, but they did affect the SDI15 (Silt Density Index) values of the Ceramic Membrane permeate. A pilot tes...

  • Ceramic Membrane filtration as seawater RO pre-treatment: influencing factors on the Ceramic Membrane flux and quality.
    Desalination and Water Treatment, 2013
    Co-Authors: Zhaoliang Cui, Yiqun Fan, Wenbo Peng, Nanping Xu
    Abstract:

    Membrane filtration has been accepted as the preferred pre-treatment method in reverse osmosis (RO) processes in recent years. In this paper, a lab.-scale Ceramic Membranes device, which has a potential to be used as pre-treatment for RO desalination, was employed to investigate the performance of Ceramic Membranes with different pore sizes and under different conditions. Ceramic Membranes with pore sizes of 50, 200, 500, and 800 nm were tested, and the effects of pore size, transMembrane pressure (TMP), coagulation method, and NaClO addn. on the permeate flux and the permeate quality of Ceramic Membranes were studied. The results show that the pore size has an insignificant effect on the permeate flux of Ceramic Membranes but the coagulation method has a significant effect. Pore size and NaClO addn. did not have significant effects on the turbidity of the Ceramic Membrane permeate, but they did affect the SDI15 (Silt D. Index) values of the Ceramic Membrane permeate. A pilot test was executed using a pilot Ceramic Membrane device with an approx. capacity of 330 m3/d. The TMP was stable with a const. flux of 150 L/m2h and a cross-flow velocity of 0.015 m/s, and the turbidity and SDI15 values were satisfactory for RO, suggesting that Ceramic Membranes can meet the demands of RO. [on SciFinder(R)]

  • Pilot study on the Ceramic Membrane pre-treatment for seawater desalination with reverse osmosis in Tianjin Bohai Bay
    Desalination, 2011
    Co-Authors: Zhaoliang Cui, Yiqun Fan, Nanping Xu
    Abstract:

    One of the critical factors for a successful seawater reverse osmosis (SWRO) process is the pre-treatment of the feed so that a stable, high-quality feed is supplied to the reverse osmosis (RO) Membranes. Membrane filtration has been accepted as the preferred pre-treatment method in RO processes in recent years. In this paper, a pilot study of a pre-treatment process using a Ceramic Membrane for the desalination of seawater from Tianjin Bohai Bay, in the Bohai Sea of China, is presented. Different coagulation methods were compared, and the flocculation-natural sedimentation operation was determined to be the optimal method for Ceramic Membrane filtration. The Ceramic Membrane was found to work adequately in a long-term run, even under low-temperature conditions (3-6°C). Based on the permeate qualities, such as turbidity, SDI15(Silt Density Index) value, and concentration of Fe, it was concluded that this Ceramic Membrane technology can be successfully used in SWRO processes. © 2011 Elsevier B.V.

  • Study on Ceramic Membrane bioreactor with turbulence promoter
    Separation and Purification Technology, 2003
    Co-Authors: Nong Xu, Weihong Xing, Nanping Xu
    Abstract:

    Abstract Membrane bioreactor (MBR) is an effective wastewater treatment process in which the Membrane separates technology integrated with the activated sludge system. The suspended solids are completely separated from the treated water by the Ceramic Membrane unit, and all bio-mass are kept in the bioreactor. Because of such advantages as good chemical stability, favorable mechanical strength, good antimicrobe ability and high separation efficiency, the Ceramic Membrane is suitable for comprising Ceramic Membrane bioreactor (CMBR) with activated sludge. For the CMBR process, the high energy requirement of recirculation needed to maintain a high cross-flow velocity combined with maintaining the Membrane permeability is a major problem hindering the widespread application of Membrane separation processes. In order to improve Membrane flux, and reduce cyclic volume and energy consumption, studying of the enhancement process is necessary. This work investigated the effect of different kinds of turbulence promoter on flux of Ceramic Membrane filtration. Three kinds of insert were used in Ceramic Membrane bioreactor. The flux under the same operation condition increased about 2.5 times with the introduction of the winding insert. Both microfiltration and ultrafiltration gave a steady flux for 30 days without chemical washing. The average reduction rate of COD was greater than 95% for municipal wastewater.

Zhaoliang Cui - One of the best experts on this subject based on the ideXlab platform.

  • Ceramic Membrane filtration as seawater RO pre-treatment: influencing factors on the Ceramic Membrane flux and quality.
    Desalination and Water Treatment, 2013
    Co-Authors: Zhaoliang Cui, Yiqun Fan, Wenbo Peng, Nanping Xu
    Abstract:

    Membrane filtration has been accepted as the preferred pre-treatment method in reverse osmosis (RO) processes in recent years. In this paper, a lab.-scale Ceramic Membranes device, which has a potential to be used as pre-treatment for RO desalination, was employed to investigate the performance of Ceramic Membranes with different pore sizes and under different conditions. Ceramic Membranes with pore sizes of 50, 200, 500, and 800 nm were tested, and the effects of pore size, transMembrane pressure (TMP), coagulation method, and NaClO addn. on the permeate flux and the permeate quality of Ceramic Membranes were studied. The results show that the pore size has an insignificant effect on the permeate flux of Ceramic Membranes but the coagulation method has a significant effect. Pore size and NaClO addn. did not have significant effects on the turbidity of the Ceramic Membrane permeate, but they did affect the SDI15 (Silt D. Index) values of the Ceramic Membrane permeate. A pilot test was executed using a pilot Ceramic Membrane device with an approx. capacity of 330 m3/d. The TMP was stable with a const. flux of 150 L/m2h and a cross-flow velocity of 0.015 m/s, and the turbidity and SDI15 values were satisfactory for RO, suggesting that Ceramic Membranes can meet the demands of RO. [on SciFinder(R)]

  • Pilot study on the Ceramic Membrane pre-treatment for seawater desalination with reverse osmosis in Tianjin Bohai Bay
    Desalination, 2011
    Co-Authors: Zhaoliang Cui, Yiqun Fan, Nanping Xu
    Abstract:

    One of the critical factors for a successful seawater reverse osmosis (SWRO) process is the pre-treatment of the feed so that a stable, high-quality feed is supplied to the reverse osmosis (RO) Membranes. Membrane filtration has been accepted as the preferred pre-treatment method in RO processes in recent years. In this paper, a pilot study of a pre-treatment process using a Ceramic Membrane for the desalination of seawater from Tianjin Bohai Bay, in the Bohai Sea of China, is presented. Different coagulation methods were compared, and the flocculation-natural sedimentation operation was determined to be the optimal method for Ceramic Membrane filtration. The Ceramic Membrane was found to work adequately in a long-term run, even under low-temperature conditions (3-6°C). Based on the permeate qualities, such as turbidity, SDI15(Silt Density Index) value, and concentration of Fe, it was concluded that this Ceramic Membrane technology can be successfully used in SWRO processes. © 2011 Elsevier B.V.

Yiqun Fan - One of the best experts on this subject based on the ideXlab platform.

  • Ceramic Membrane filtration as seawater RO pre-treatment: influencing factors on the Ceramic Membrane flux and quality.
    Desalination and Water Treatment, 2013
    Co-Authors: Zhaoliang Cui, Yiqun Fan, Wenbo Peng, Nanping Xu
    Abstract:

    Membrane filtration has been accepted as the preferred pre-treatment method in reverse osmosis (RO) processes in recent years. In this paper, a lab.-scale Ceramic Membranes device, which has a potential to be used as pre-treatment for RO desalination, was employed to investigate the performance of Ceramic Membranes with different pore sizes and under different conditions. Ceramic Membranes with pore sizes of 50, 200, 500, and 800 nm were tested, and the effects of pore size, transMembrane pressure (TMP), coagulation method, and NaClO addn. on the permeate flux and the permeate quality of Ceramic Membranes were studied. The results show that the pore size has an insignificant effect on the permeate flux of Ceramic Membranes but the coagulation method has a significant effect. Pore size and NaClO addn. did not have significant effects on the turbidity of the Ceramic Membrane permeate, but they did affect the SDI15 (Silt D. Index) values of the Ceramic Membrane permeate. A pilot test was executed using a pilot Ceramic Membrane device with an approx. capacity of 330 m3/d. The TMP was stable with a const. flux of 150 L/m2h and a cross-flow velocity of 0.015 m/s, and the turbidity and SDI15 values were satisfactory for RO, suggesting that Ceramic Membranes can meet the demands of RO. [on SciFinder(R)]

  • Pilot study on the Ceramic Membrane pre-treatment for seawater desalination with reverse osmosis in Tianjin Bohai Bay
    Desalination, 2011
    Co-Authors: Zhaoliang Cui, Yiqun Fan, Nanping Xu
    Abstract:

    One of the critical factors for a successful seawater reverse osmosis (SWRO) process is the pre-treatment of the feed so that a stable, high-quality feed is supplied to the reverse osmosis (RO) Membranes. Membrane filtration has been accepted as the preferred pre-treatment method in RO processes in recent years. In this paper, a pilot study of a pre-treatment process using a Ceramic Membrane for the desalination of seawater from Tianjin Bohai Bay, in the Bohai Sea of China, is presented. Different coagulation methods were compared, and the flocculation-natural sedimentation operation was determined to be the optimal method for Ceramic Membrane filtration. The Ceramic Membrane was found to work adequately in a long-term run, even under low-temperature conditions (3-6°C). Based on the permeate qualities, such as turbidity, SDI15(Silt Density Index) value, and concentration of Fe, it was concluded that this Ceramic Membrane technology can be successfully used in SWRO processes. © 2011 Elsevier B.V.

Siti Khadijah Hubadillah - One of the best experts on this subject based on the ideXlab platform.

  • fabrications and applications of low cost Ceramic Membrane from kaolin a comprehensive review
    Ceramics International, 2017
    Co-Authors: Siti Khadijah Hubadillah, Mukhlis A. Rahman, Zawati Harun, Mohd Hafiz Dzarfan Othman, Juhana Jaafar, Ahmad Fauzi Ismail, Takeshi Matsuura, Mikihiro Nomura
    Abstract:

    Abstract The application of low cost Ceramic Membrane from kaolin has attracted much interest due to its excellent mechanical stability, chemical and thermal resistivity and most importantly, because it is cost effective, in some cases, compared to polymeric Membranes. The advantage of kaolin based Ceramic Membrane is its thermal properties that allow sintering at much lower temperature than alumina. Although many studies have been made on the application of kaolin based Ceramic Membranes, detailed discussions were scarcely made and the information on the fabrication of Ceramic Membrane from kaolin is very limited. This article is aimed to make a comprehensive review on Ceramic Membrane from kaolin for its fabrication methods and applications. An attempt is also made to show the future direction of the R and D on the kaolin based Ceramic Membrane.

  • preparation and characterization of low cost porous Ceramic Membrane support from kaolin using phase inversion sintering technique for gas separation effect of kaolin content and non solvent coagulant bath
    Chemical Engineering Research & Design, 2016
    Co-Authors: Siti Khadijah Hubadillah, Zawati Harun, Mohd Hafiz Dzarfan Othman, Ahmad Fauzi Ismail, Wan Norharyati Wan Salleh, Hatijah Basri, Muhamad Zaini Yunos, Paran Gani
    Abstract:

    The aim of this study is to investigate the feasibility of using kaolin as a starting material in Ceramic Membrane support preparation using phase inversion/sintering technique at different kaolin content and non-solvent coagulant bath. The Ceramic suspension was prepared by mixing the kaolin, polyethersulfone (PESf) as binder, N-methyl-2-pyrrolidone (NMP) as solvent and Arlacel as dispersant using a magnetic stirrer; drying and sintering process at temperature of 1200 °C. By varying the kaolin contents, different morphologies of Ceramic support were obtained due to the variations in viscosity of Ceramic suspensions. Similarly, different non-solvent coagulant bath was found to affect the Membrane support structure through liquid–liquid demixing process and at the same time affected Membrane support's roughness, porosity, pore size distribution and strength. All Ceramic supports possessed high gas permeation with no separation capability, proven the suitability as Ceramic Membrane support. The cost for the prepared Ceramic Membrane support in this work is as low as $5.97, prepared at 54.0 g kaolin content and immersed into distilled water.

Katsumi Kano - One of the best experts on this subject based on the ideXlab platform.

  • Dynamic microfiltration of dilute slurries with a rotating Ceramic Membrane
    Journal of Membrane Science, 1991
    Co-Authors: Toshiro Murase, Chidphong Pradistsuwana, Eiji Iritani, Katsumi Kano
    Abstract:

    The transient behavior of dynamic microfiltration, where a dilute slurry containing submicrometer sized solids is filtered through a Ceramic Membrane under constant pressure, is studied using a rotating Ceramic Membrane. With a Ceramic Membrane of a much smaller pore size than the particle size of the suspended solids, the dynamic microfiltration follows the principle of thin-cake filtration. A filtrate velocity equation is derived for the thin-cake filtration process by introducing a dynamic filtration coefficient, defined as the ratio of deadend to dynamic cake resistance, into the conventional Ruth filtration equation. On the basis of the fact that the dynamic factor depends on a controlling variable composed of the shear stress acting on the cake surface and the coefficient of constant pressure filtration, a method is presented for calculating the variation of filtrate volume with time. A basis for the design and evaluation of rotational microfiltration is proposed. © 1991.