The Experts below are selected from a list of 6405 Experts worldwide ranked by ideXlab platform

Patricia Arlabosse - One of the best experts on this subject based on the ideXlab platform.

  • integration of a thermally assisted mechanical Dewatering Process in a drying facility
    2011
    Co-Authors: Cusso N Grau, Mario Lanc, Patricia Arlabosse
    Abstract:

    Mechanical Dewatering Processes can be intensified through heat supply. With the thermally assisted mechanical Dewatering (TAMD) Process investigated in this study, the extraction yield is improved by 23% for alfalfa. After separation, the residual solid fraction must be dried to guarantee a good conservation. The TAMD Process has the special feature to operate at low temperature (around 60°C). Pinch analysis is used as a prerequisite to assess the opportunity to recover the energy from the exhaust gases of the dryer to heat the secondary air or to heat the coolant flowing in the jacketed wall of the TAMD Process. Results emphasizes that significant energy profits can easily be obtained by recovering the heat load in the exhaust gas of the dryer, leading to an energy saving of 55% on the overall separation chain

  • application of a thermally assisted mechanical Dewatering Process to biomass
    Biomass & Bioenergy, 2011
    Co-Authors: Patricia Arlabosse, A Mahmoud, Arnaud Fernandez
    Abstract:

    Abstract Thermally assisted mechanical Dewatering (TAMD) is a new Process for energy-efficient liquid/solids separation which enhances conventional-device efficiency. The main idea of this Process is to supply a flow of heat in mechanical Dewatering Processes to favour the reduction of the liquid content. This is not a new idea but the proposed combination, especially the chosen operating conditions ( T P T piston  = 80 °C), the dry solid content of the press cake can reach 66%, compared to 36% at ambient temperature. A significant regression model, describing changes on final dry solids content with respect to independent variables, was established with determination coefficient, R 2 , greater than 88%. With an energy consumption of less than 150 kWh/m 3 , the use of the TAMD Process before a thermal drying Process leads to an energy saving of at least 30% on the overall separation chain.

  • liquid pressure measurements in a thermally assisted mechanical Dewatering Process
    Chemical Engineering Research & Design, 2010
    Co-Authors: Etienne Chantoiseau, Patricia Arlabosse
    Abstract:

    Abstract The thermally assisted mechanical Dewatering Process, investigated in this paper, couples in one stage mechanical Dewatering at low pressure ( P applied T

Arnaud Fernandez - One of the best experts on this subject based on the ideXlab platform.

  • application of a thermally assisted mechanical Dewatering Process to biomass
    Biomass & Bioenergy, 2011
    Co-Authors: Patricia Arlabosse, A Mahmoud, Arnaud Fernandez
    Abstract:

    Abstract Thermally assisted mechanical Dewatering (TAMD) is a new Process for energy-efficient liquid/solids separation which enhances conventional-device efficiency. The main idea of this Process is to supply a flow of heat in mechanical Dewatering Processes to favour the reduction of the liquid content. This is not a new idea but the proposed combination, especially the chosen operating conditions ( T P T piston  = 80 °C), the dry solid content of the press cake can reach 66%, compared to 36% at ambient temperature. A significant regression model, describing changes on final dry solids content with respect to independent variables, was established with determination coefficient, R 2 , greater than 88%. With an energy consumption of less than 150 kWh/m 3 , the use of the TAMD Process before a thermal drying Process leads to an energy saving of at least 30% on the overall separation chain.

Jonas Berghel - One of the best experts on this subject based on the ideXlab platform.

Raymond J. Zeng - One of the best experts on this subject based on the ideXlab platform.

  • Supplementary In-Depth Analysis of the Waste Activated Sludge Dewatering Process Using a Rheological Analysis
    ACS ES&T Engineering, 2020
    Co-Authors: Hou-feng Wang, Hua-jie Wang, Ya-nan Bai, Wei Zhang, Raymond J. Zeng
    Abstract:

    Much research has been conducted to improve sludge dewaterability and reveal its Dewatering Process. However, to date, two key issues remain unsolved: (1) the difficulty of Dewatering sludge and (2...

  • Applying rheological analysis to understand the mechanism of polyacrylamide (PAM) conditioning for sewage sludge Dewatering
    RSC Advances, 2017
    Co-Authors: Hou-feng Wang, Hua-jie Wang, Raymond J. Zeng
    Abstract:

    Nowadays, polyacrylamide (PAM) is widely used for sludge conditioning, while the interactions between PAM and sludge particles influencing the Dewatering Process remain to be clarified. This study focused on applying rheological analysis to understand the mechanism of PAM conditioning for sewage sludge Dewatering. Effective solid–liquid separation was achieved mostly due to the changes of physical properties instead of biochemical properties for conditioned sludge. PAM addition enhanced the non-Newtonian properties and strengthened the solid-like character of sludge in the linear region, allowing initial enhancement of the network strength of sludge flocs. Due to these changes in rheological behavior and more free water being available to flow, the breakdown of the colloidal network of sludge in the non-linear viscoelastic regime allowed high-performance separation between water and solid-phase. These findings show that rheological analysis can serve as a useful indicator of the activated sludge Dewatering Process.

Long Fei Wang - One of the best experts on this subject based on the ideXlab platform.

  • Response of extracellular polymeric substances to thermal treatment in sludge Dewatering Process
    Environmental Pollution, 2017
    Co-Authors: Long Fei Wang, Chen Qian, Jian-kai Jiang
    Abstract:

    Abstract Sludge Dewatering is an important Process in municipal wastewater treatment and critically influences the subsequent transportation and disposal. Thermal treatment coupled with other chemical Processes has been widely used to improve sludge dewaterability. However, information about the response of sludge extracellular polymeric substances (EPS) to thermal treatment and its role in sludge Dewatering is still limited. In this work, the effects of thermal treatment on anaerobic and aerobic sludges were investigated with an emphasis on the colloid properties of released EPS in sludge Dewatering Process. The results indicate that sludge dewaterability became deteriorated with the increased temperature in the range of 30–170 °C, which was ascribed to the disintegration of sludge flocs and change of EPS characteristics. Disintegrated sludge induced the release of the negatively charged EPS, resulting in the weakened bridging interaction and lower compactness. After thermal treatment, the EPS with a higher average molecular weight and stretched coil configuration retained more water. In addition, difference in dewaterability between anaerobic and aerobic sludges was found to be attributed to their different contents and structures of EPS components. These results provide an insight into thermal-dependent sludge Dewatering Process and are useful to facilitate water-sludge separation.

  • Characterization of Dewatering Process of activated sludge assisted by cationic surfactants
    Biochemical Engineering Journal, 2014
    Co-Authors: Long Fei Wang, Zhong-hua Tong
    Abstract:

    Abstract In this work, the Dewatering of activated sludge assisted by cationic surfactants was investigated. Dose of dodecyl trimethyl ammonium bromide (DTAB) and cetyl trimethyl ammonium bromide (CTAB) resulted in the release of extracellular polymeric substances (EPS) from sludge and decrease in sludge negative charge. The surfactants significantly promoted sludge dewaterability, as reflected by decreased specific resistance of filtration (SRF) and water content in sludge cakes. The treated sludge were analyzed by combined use of differential scanning calorimetry (DSC), thermo gravimetric analysis (TGA) and Brunauer–Emmett–Teller (BET) analysis. CTAB was found more effective in releasing bound water from sludge than DTAB, due to its superior surface activity and strong adsorption/bridge capacities with sludge. The specific surface area and pore size of sludge cakes declined after surfactant treatment, indicating an enhanced compressibility. With these results, the surfactant-assisted Dewatering mechanism could be attributed to the integrated effects of electrostatic neutralization, enhanced compaction and release of EPS and bound water. Our study clearly characterizes the accelerated Dewatering Process assisted by cationic surfactants, and demonstrates that cationic surfactants could be used as a potential agent for sludge Dewatering.