- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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The electro-osmotic dewatering process, a combination of mechanical force and electric field, improves the sludge liquid/solid separation and reduces the sludge water content (Fig. 3). It was first proposed for peat dewatering in the 1900s and later applied for sludge dewatering ( Kondoh and Hiraoka, 1990 ).
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Electro-dewatering (EDW) is an innovative method for volume reduction of sewage sludge before re-utilization and disposal. In this study, dewaterability limit and energy consumption in sludge electro-dewatering process were directly explored using in-situ linear sweep voltammetry (LSV) analysis by a high-voltage electrochemical …
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Overview of sludge thickening and dewatering. Thickening and dewatering processes both provide a concentrated, consolidated product − retaining most of the solids from the original sludge – along with a diluted stream which is predominantly water. For both process types the dilute stream is usually directed back to the inlet of the …
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The energy consumption associated with electro-dewatering of oily sludge is a crucial aspect that requires attention for future industrial utilization of sludge. Fig. 7 a illustrates the effect of different voltages on E uec (unit energy consumption). E uec increased with voltage and then showed a slight decrease. The maximum value of 0.367 …
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Sludge electro-dewatering (SED) is an effective volume reduction method for wastewater sludge before disposal or recycling. In this study, the influences of sludge cake temperature variation during the SED process on energy efficiency and time-space yield were studied by lab scale experiments and verified numerical simulation.
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In addition, most of the disposal methods, including incineration, composting and landfill, require a sludge moisture content of < 60% [6], [7], [23], necessitating the development of cost-effective sludge dewatering technologies. Electro-osmosis dewatering (or in short, electro-dewatering, EDW) is a deep dehydration technology …
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The effects of sludge aging on improving sludge electro-dewatering (SED) performance were studied, with the sludge properties variation during aging process investigated. Sludge electro-dewatering performances were explored by constant voltage method (25 V) on various samples. The organic matter in the extracellular polymeric …
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Sludge electro-dewatering extent (dry solid content limit) and concentration gradient was increased with enhanced electric field intensity. Owing to the high content of soluble salts in the sludge, it takes excessive energy to …
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Electro-dewatering (ED) is an attractive technology for enhancing dewaterability of waste activated sludge (WAS), and the distribution and composition of EPS and secondary structure of extracellular protein in sludge has a great influence on the sludge dewaterability.
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According to a study on dewaterability limit and energy consumption in sludge electro-dewatering process, the energy consumption in sludge electro-dewatering process was directly explored using linear sweep voltammetry (LSV) analysis by a high-voltage electrochemical workstation instead of a traditional DC power source …
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The feasibility of pressure-driven electro-dewatering (EDW) on sludge samples taken after different biological processes, stabilisation methods or mechanical dewatering techniques was assessed. First, the influence of potential values on EDW of anaerobically and aerobically stabilised, mechanically dewatered, sludge samples was …
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Waste activated sludge requires effective dewatering, high biological stability and retention of nutrients prior to disposal for agricultural application. The study was conducted to evaluate the impact of pressure-driven electro-dewatering (EDW) on improving sludge characteristics related to disposa …
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Pressurized electro-dewatering of sludge is performed on self-designed apparatus. • Dewatering performance of three dewatering modes is compared. • Sludge pore structures are measured with low-field NMR technique. • A fractal electro-osmosis model is proposed to predict dewatering process.
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This paper deals with the influence of pH, salt and polyelectrolytes on the electro-dewatering (EOD) of agro-industrial sludge at 3% w/w of dry matter. Initially, a selection of polyelectrolyte types and doses was carried out …
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During pressure-driven electro-dewatering (EDW) process, the applied pressure reduces the pores volume and squeezes all the free water from sludge, while electro-osmosis enhances the surface adhesion of the sludge and induces the available water to migrate towards the cathode.
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