Liquid Pressure Measurement in Filtration–Compression Cell

Couturier, Stéphane; Valat, Marc; Vaxelaire, Jean; Puiggali, Jean‐Rodolphe

doi:10.1081/ss-120018123

Cited by 7 publications

(3 citation statements)

References 20 publications

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“…After that, we let the reactors spin at 80 revolutions per minute to slowly mix the contents. The sludge was brought to the FCC [20] (Fig. 2) after conditioning.…”

Section: Methodsmentioning

confidence: 99%

Enhancing Sludge Dewatering Process by Using Green and Environmental Wastes

Rabea

Shahawy

Salem³

et al. 2023

Suez Canal Engineering, Energy and Environmental Science

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Sludge dewatering is challenging due to sludge's highly compressible nature and the presence of colloidal particles. The capital, operating, and transportation expenses of wastewater management can be decreased by decreasing the amount of water content in the sludge. In the present study, the sludge samples were taken from municipal WWTP, with a moisture content of 98% and specific resistance to filtration (SRF) 1.2265E+16 m/kg. The samples were chemically conditioned with moringa Olivera at different dosages and physically conditioned with (rice husk and wheat straw) to improve sludge dewatering. The experimental work included evaluating the treated sludge's dewatering ability SRF. The results showed that the chemical coagulation affected the SRF of the sludge; the lowest values were 3.43296E+15 m/kg and time to filtrate (TTF) was 326.6 sec. However, when the rice husk and wheat straw were combined with chemical conditioning, noticeable improvements were noted in the sludge dewatering ability compared to the coagulation conditioning alone. The physical conditioners acted as skeleton builders during this pressure dewatering. The lowest SRF. were 1.62497E+15m/kg and 1.58377E+15m/kg for wheat straw and rice husk, respectively. Hence, the study recommends using rice husk or wheat straw for conditioning.

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“…After that, we let the reactors spin at 80 revolutions per minute to slowly mix the contents. The sludge was brought to the FCC [20] (Fig. 2) after conditioning.…”

Section: Methodsmentioning

confidence: 99%

Enhancing Sludge Dewatering Process by Using Green and Environmental Wastes

Rabea

Shahawy

Salem³

et al. 2023

Suez Canal Engineering, Energy and Environmental Science

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show abstract

“…1) in order to avoid contact between the solid and the diaphragm of the pressure transducer. In this way a true measurement of the liquid pressure at the cake surface, even during expression, was provided, without modifying the filtration and expression process [23]. Electronics parts of the pressure transducer were transferred outside the cell through a small pipe.…”

Section: Methodsmentioning

confidence: 99%

Enhanced expression of filter cakes using a local thermal supply

Couturier

Valat

Vaxelaire

et al. 2007

Separation and Purification Technology

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“…Consequently, research in progress tends to enhance the dewatering ability of conventional mechanical processes. Intensification of mechanical dewatering processes can take several forms: simultaneous application of an electric field (Lee et al, 2007;Curvers et al, 2007), possibly pulsed (Grimi et al, 2007;Gachovska et al, 2006), superimposition of ultrasounds (Smythe and Wakeman, 2000) or with heat supply (Clayton et al, 2006;Mahmood et al, 1998;Peuker and Stahl, 2001;Couturier et al, 2003). For a few years now, we specifically investigate a thermally assisted mechanical dewatering (TAMD) process, which couples mechanical dewatering at low pressure (usually P applied < 1125 kPa) with a moderate heating (T < 80°C) of the walls of the apparatus in contact with the product.…”

Section: Introductionmentioning

confidence: 99%

Liquid pressure measurements in a thermally assisted mechanical dewatering process

Chantoiseau

Arlabosse

2010

Chemical Engineering Research and Design

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The thermally assisted mechanical dewatering process, investigated in this paper, couples in one stage mechanical dewatering at low pressure (P applied < 1125 kPa) with a moderated heating (T < 80°C). Former studies emphasized that the separation enhancement depends on the product. To identify the mechanisms involved, a 1D filtration/compression cell is instrumented with pore liquid sensors distributed on the wall. Talc and cellulose in suspensions in salt water are used as test materials. Cake growth and consolidation can be followed through these measurements. With heat supply, the liquid pressure gradient, which has vanished during the consolidation, reappears in the cake. An additional flow of liquid occurs when the thermal equilibrium is reached in the porous media. This additional flow represents 18% of the filtrate mass recovered at ambient temperature for talc suspensions and half less for cellulose suspensions.

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Liquid Pressure Measurement in Filtration–Compression Cell

Cited by 7 publications

References 20 publications

Enhancing Sludge Dewatering Process by Using Green and Environmental Wastes

Enhancing Sludge Dewatering Process by Using Green and Environmental Wastes

Enhanced expression of filter cakes using a local thermal supply

Liquid pressure measurements in a thermally assisted mechanical dewatering process

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