Protein analysis as a simple method for the quantitative assessment of sewage sludge disintegration

Schmitz, Ulrich; Berger, Christian; Orth, Hermann

doi:10.1016/s0043-1354(00)00091-9

Cited by 28 publications

(13 citation statements)

References 2 publications

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“…SCOD was measured by Hach spectrophotometric method after preliminary vacuum filtration using a cellulose nitrate membrane with 0.2 mm pore size. Following Schmitz et al (2000), DD COD was given as the ratio between the soluble COD increase during sonication and that resulting from a strong alkaline disintegration of sludge (0.5 M NaOH for 24 h at room temperature (Huan et al, 2009)):…”

Section: Methodsmentioning

confidence: 99%

Optimisation of sludge pretreatment by low frequency sonication under pressure

Julcour-Lebigue

Barthe

et al. 2016

Journal of Environmental Management

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This work aims at optimizing sludge pretreatment by non-isothermal sonication, varying frequency, US power (PUS) and intensity (IUS varied through probe size), as well as hydrostatic pressure and operation mode (continuous vs. sequential - or pulsed - process). Under non isothermal sonication sludge solubilization results from both ultrasound disintegration and thermal hydrolysis which are conversely depending on temperature. As found in isothermal operation: - For a given specific energy input, higher sludge disintegration is still achieved at higher PUS and lower sonication time. - US effects can be highly improved by applying a convenient pressure. - 12 kHz always performs better than 20 kHz. Nevertheless the optimum pressure depends not only on PUS and IUS, but also on temperature evolution during sonication. Under adiabatic mode, a sequential sonication using 5 min US-on at 360 W, 12 kHz, and 3.25 bar and 30 min US-off gives the best sludge disintegration, while maintaining temperature in a convenient range to prevent US damping.

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Section: Methodsmentioning

confidence: 99%

Optimisation of sludge pretreatment by low frequency sonication under pressure

Julcour-Lebigue

Barthe

et al. 2016

Journal of Environmental Management

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“…A parameter known as "degree of disintegration" (DD) has often been used to quantify the efficiency of sludge disintegration (Schmitz et al 2000). However, pretreatment also disintegrates extracellular materials, including organic debris and extracellular polymers, which become part of the SCOD.…”

Section: Chemical Evaluationmentioning

confidence: 99%

“…(11.1) was proposed by Müller to determine the degree of disintegration (Schmitz et al 2000). (11.1) was proposed by Müller to determine the degree of disintegration (Schmitz et al 2000).…”

Section: Chemical Evaluationmentioning

confidence: 99%

Pretreatment of High‐Solids Wastes/Residues to Enhance Bioenergy Recovery

Santha¹

2008

Anaerobic Biotechnology for Bioenergy Production

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“…Studies have shown that protein analysis can be used to measure the degree of cellular disruption (Schmitz et al, 2000). Soluble protein analysis was used to compute the percent disruption according to the method used by Erdincler and Vesilind (2002) as shown below.…”

Section: Cell Disruptionmentioning

confidence: 99%

Heat Treatment Combined With Cation Addition to Improve the Dewaterability of Waste Activated Sludge

Skidmore¹,

Reyes²

2004

proc water environ fed

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Heat treatment was combined with cation addition to increase the dewaterability of waste activated sludge. Soluble protein analysis showed that heat treatment resulted in cell disruption. Dilatometry showed that bound water increased as a result of heat treatment. A centrifugal dewatering test demonstrated that cation addition (Na + , K + , Ca 2+ , Mg 2+ , and Fe 3+ ) led to increased dewaterability. There was no correlation between the bound water content of disrupted sludge and its dewaterability. The combination of heat treatment and cation addition produced no significant changes at any of the temperatures used in this study. It is possible that higher centrifugal forces are needed for centrifugation to be an accurate measure of dewaterability.

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Protein analysis as a simple method for the quantitative assessment of sewage sludge disintegration

Cited by 28 publications

References 2 publications

Optimisation of sludge pretreatment by low frequency sonication under pressure

Optimisation of sludge pretreatment by low frequency sonication under pressure

Pretreatment of High‐Solids Wastes/Residues to Enhance Bioenergy Recovery

Heat Treatment Combined With Cation Addition to Improve the Dewaterability of Waste Activated Sludge

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