sludge disintegration with stirred ball mills

Anaerobic digestion and dewatering characteristics of ...

Mechanical cell disintegration and its influence on anaerobic digestion was investigated using four different methods. Methods to describe the degree of cell-disruption were developed and the release of organic components into the sludge water was measured. The best results were optained using a stirred ball mill and a high-pressure homogenizer.

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Sludge minimization technologies--an overview

Various sludge disintegration technologies for sludge minimization are discussed, including mechanical methods (focusing on stirred ball-mill, high-pressure homogenizer, ultrasonic disintegrator), chemical methods (focusing on the use of ozone), physical methods (focusing on thermal and thermal/chemical hydrolysis) and biological methods ...

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Ball Mill Method For Determining The Disintegration Of ...

The stirred ball mill method is a common method applied in largescale sludge disintegration Many reports focus on the disintegration results of sludge or the influence of parameters on the anaerobic process of treated sludge, but there have been few studies on the mechanism of sludge disintegration by This study focused on the mechanism of ...

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Investigation and Assessment of Sludge Pre-treatment …

The influence of disintegration of excess sludge on anaerobic digestion was studied in full scale. A stirred ball mill, an ultrasound disintegrator, a lysate centrifuge and an ozone treatment were used. The results of the degradation process was compared to a …

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Mechanical sludge disintegration for the production of ...

Stirred ball mills and high pressure homogenizers were used for sludge disintegration by Muller (2000), to produce a carbon. 4 source for denitrification. According to their experiments the maximum denitrification rate was up to 15 mg NO 3-N g-1 VSS h-1. Chiu et al., (1997) reported that the

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Best Practices for Improved Sludge Disgestion

For the sludge disintegration methods, thermal hydrolysis is a reliable method to in-crease VS reduction, especially for excess sludge. VS reduction of >60% can be usually reached for mixed sludge, but this benefit comes at the cost of higher return load in NH 4-N. A combination of thermal and chemical disintegration at medium temperature

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Minimisation of costs by using disintegration at a full ...

Various half-scale and lab-scale investigations have already shown that the disintegration of excess sludge is a possible pre-treatment to optimise anaerobic digestion. To control these results different methods of disintegration were investigated at a full-scale plant. Two stirred ball mills and a plant for oxidation with ozone were applied.

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Reduction of sewage sludge by ball mill pretreatment and ...

The effects of ball mill pretreatment and Mn catalytic ozonation on the reduction of sewage sludge were investigated. The ball mill pretreatment increased ΔSCOD from 2,000mg/L to 9,000 mg/L, as Total Solids (TS) increased from 1% to 4% at a specific energy of 75.8 KJ/g-TSS. The increase in disintegration ratio (DR), which is an index of the solubilization of sewage …

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Mechanism study of excess sludge disintegration by …

Stirred ball mill(SBM) method is one of the usually method which applied in large scale application cases of sludge disintegration. This study focuses on investigation the mechanism of sludge disintegration by SBM method. Besides analysis general indicators of

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Anaerobic Processes in Waste Treatment - JSTOR

anaerobic digestion. The disintegration techniques used included a stirred ball mill, an ultrasound disintegrator, a lysate centrifuge and ozone treatment. An enhancement of the degree of degradation of 7.4-20% was observed compared to a reference system without pretreatment. Kopplow et al. (2004) investigated the effect of sludge

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Mechanism Investigation of Excess Sludge Disintegration …

The stirred ball mill (SBM) method is a common method applied in large-scale sludge disintegration. Many reports focus on the disintegration results of sludge or the influence of parameters on the ...

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stirred ball mill maintenance - reformhaus-schaer.de

Degree of disintegration by stirred ball mill with increasing Incorporating the proposed SBM in the wastewater specific energy inputs treatment was explored. Figure 5 depicts the inclusion Figure 4 shows the result of the disintegrability studies of SBM as an operational unit in the WWTP for sludge (DS) at various specific energy inputs. ...

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Reduction of excess sludge production using mechanical ...

Using three different disintegration devices (ultrasonic homogeniser, stirred media mill, high pressure homogeniser) and different operational parameters of the disintegration, the effect of mechanical disintegration on the excess sludge production and on the effluent quality was studied within a continuously operated, laboratory scale ...

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Mechanical disintegration of sewage sludge.

An optimum of the bead diameter and the stress intensity in stirred ball mills could be detected. A comparison of the results of different methods of sludge disintegration shows that the investigated ultrasonic homogenizers are inferior to a high pressure homogenizer and a stirred ball mill in terms of energy consumption. PMID: 11379090

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Mechanism Study of Excess Sludge Disintegration by …

Stirred ball mill(SBM) method is one of the usually method which applied in large scale application cases of sludge disintegration. This study focuses on investigation the mechanism of sludge disintegration by SBM method. Besides analysis general indicators of SCOD, TN, TP and calculated the disintegration rate of COD (DDCOD). The result indicated the SCOD and …

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Investigation and assessment of sludge pre-treatment ...

The influence of disintegration of excess sludge on anaerobic digestion was studied in full scale. A stirred ball mill, an ultrasound disintegrator, a lysate centrifuge and ozone treatment were used. The results of the degradation process were compared to a reference system without pre-treatment. An enhancement of the degree of degradation of 7 ...

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COMBINATION OF ALKALINE SOLUBILIZATION WITH …

microwave digestion as a sludge disintegration method: effect on gas production and quantity and dewaterability of anaerobically digested sludge a thesis submitted to the graduate school of natural and applied sciences of middle east technical university by ilgin do Ğan in partial fulfillment of the requirements for

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Disintegration of sewage sludges and influence on ...

Mechanical disintegration of excess sludge Parameter-studies have been carried out using a stirred ball mill, a high-pressure homogenizer, an ultrasonic homogenizer and a shear-gap homogenizer. The performance of the various disintegration methods can be compared with each other using the specific energy, which is defined as the amount of ...

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Mechanical disintegration of sewage sludge

An optimum of the bead diameter and the stress intensity in stirred ball mills could be detected. A comparison of the results of different methods of sludge disintegration shows that the investigated ultrasonic homogenizers are inferior to a high pressure homogenizer and a stirred ball mill in terms of energy consumption.

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The effect of implemented pulsed electric field (PEF ...

sludge disintegration in the stage of wastewater treatment or in the sludge stage is a possible strategy of sludge minimisation. Now many sludge disintegration technologies are being explored and partially already being implemented, e.g. stirred ball–mill, ultrasonic disintegrator, ozone [6–11]. A new method of

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Sludge minimization technologies - an overview

Various sludge disintegration technologies for sludge minimization are discussed, including mechanical methods (focusing on stirred ball-mill, high-pressure homogenizer, ultrasonic disintegrator), chemical methods (focusing on the use of …

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Mechanism Investigation of Excess Sludge Disintegration …

Abstract. The stirred ball mill (SBM) method is a common method applied in large-scale sludge disintegration. Many reports focus on the disintegration results of sludge or the influence of parameters on the anaerobic process of treated sludge, but there have been few studies on the mechanism of sludge disintegration by SBM.

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Stirred Ball Mill Sludge

Mechanical Disintegration Of Sewage Sludge. An optimum of the bead diameter and the stress intensity in stirred ball mills could be detected. A comparison of the results of different methods of sludge disintegration shows that the investigated ultrasonic homogenizers are inferior to a high pressure homogenizer and a stirred ball mill in terms of energy consumption.

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Stirred mills - for wet grinding - Outotec

The Outotec stirred mills are suitable for a large range of product sizes. The standardized range includes chamber units of up to 50,000 liters and the world's largest industry units with up to 6,500 kW of installed power. Floor space use is optimized, which reduces investment costs, and installation is easy.

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Mechanical disintegration of sewage sludge | Water …

An optimum of the bead diameter and the stress intensity in stirred ball mills could be detected. A comparison of the results of different methods of sludge disintegration shows that the investigated ultrasonic homogenizers are inferior to a high pressure homogenizer and a stirred ball mill in terms of energy consumption.

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Microbial growth reduction in sewage sludge by stirred ...

disintegration and ozonation of excess sludge showed accelerated anaerobic digestion.11 Besides mechanical disintegration and ozonation, other methods, e.g. oxidation, thermal, chemical and thermochemical pretreatment methods are also used to improve sludge digestibility.12–14 Stirred ball mill method Experimental investigations using SBM ...

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NEW APPROACHES TO MINIMIZE EXCESS SLUDGE IN …

– Mechanical pretreatment using ultrasonication, mills and homogenizers [G. Lehne, A. Muller and J. Schwedes 2001], [K. Nickel et al., 1998] [U. Basier and P. Schmidheiny, 1997] • Stirred Ball Mills (SBM) • High Pressure Homogenizers (HPH) • Ultrasonic Homogenizers (UH) • Mechanical Jet Smash Technique (MJS)

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