sludge disintegration with stirred ball mills

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Microbial growth reduction in sewage sludge by …

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 ...

stirred ball mill

A study on the effect of process parameters in stirred ball mill An experimental study on the fine grinding of calcite powder (d50 = 62.16 μm) using a 0.75 l …

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.

US9216418B2 - Hydraulic milling ball feed and discharge ...

US9216418B2 US13/902,396 US201313902396A US9216418B2 US 9216418 B2 US9216418 B2 US 9216418B2 US 201313902396 A US201313902396 A US 201313902396A US 9216418 B2 US9216418 B2 US 9216418B2 Authority US United States Prior art keywords grinding ball mill container grinding bodies auxiliary Prior art date Legal status (The legal status is …

Sludge reduction by mixed liquor ozonation - UBC Library ...

In this comparative study, a combination of mixed liquor ozone treatment and an enhanced biological phosphorus removal (EBPR) process with long SRT operations (25 d and 50 d) was tested for sludge reduction. An equivalent to about 80% sludge reduction was achieved in an EBPR system with mixed liquor ozonation and with long SRT operation. The effluent quality …

Improvement of anaerobic digestion of sludge

liquefL solids as much as possible. Different disintegrating devices, mechanical as stirred ball mills, homogenizers, ultra-sound and other systems can be introduced in sludge treatment technology line after thickening of waste activated sludge, even can be directly integrated into thickening machine (lysate centrifuge). (Dohanyos at al., 1997)

Mechanical disintegration of sewage sludge | Water Science ...

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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MILLS BALL PEBBLE JAW CRUSHER VSI 100 micron VIBRATING MILL Size, 2 microns wet STIRRED MILL (kw 185-) 100 microns 2 microns 1 m 100. cement grinding optimisation - CiteSeerX A potential for application of stirred milling technology for fine cement grinding was also discussed Key words: dry grinding, process optimisation, modelling.

ball mills in anaerobic digester

Mechanical disintegration of sewage sludge, be used for an accelerated and improved anaerobic digestion of excess sludge, An optimum of the bead diameter and the stress intensity in stirred ball mills. Read more

Mechanical disintegration of sewage sludge. - Abstract ...

30233 PDFs | Review articles in BALL MILLING

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 ...

[ biological treatment system sludge lattice ball mill ]

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).

ball mills in anaerobic digester

ball mills in anaerobic digester. ... Aug 01, 2002· 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 ...

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Microbial growth reduction in sewage sludge by stirred ball mill disintegration and estimation by respirometry. Journal of Chemical Technology and Biotechnology, 2008. ... The mill was operated at 1100 rpm with the setup reported elsewhere21,26 and the following treatment time up to 20 min. Intermediate samples procedure was adopted.

Hybrid alkali-hydrodynamic disintegration of waste ...

complex organic compounds, such as waste-activated sludge (WAS). The aim of lab-scale experiments was to pre-hydrolyze the sludge by means of low intensive alkaline sludge conditioning before applying hydrodynamic disinte-gration, as the pre-treatment procedure. Application of both processes as a hybrid disintegration sludge technology result-

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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.

Disintegration of sludge using ozone-hydrodynamic ...

In our study we applied hydrodynamic cavitation and ozonation both separately and combined, to determine the synergistic effect of these two technologies for sludge disintegration. A 2 mm orifice was used as a cavitation device. Ozone was injected after cavitation at a concentration of 35 mg/L at a flow of 3 Lpm. The sludge was subjected to treatment for 90 minutes in all three …

US8118247B2 - Agitator ball mill - Google Patents

An agitator ball mill for finely grinding or dispersing material has a cylindrical or conical grinding chamber for accommodating grinding bodies and for accommodating the material which is to be ground or dispersed. It also has an inlet, which is arranged at one end of the grinding chamber, an agitator, which extends in the axial direction into the grinding chamber and has agitating …

Effects of thermal and mechanical pretreatments of ...

Mechanical sludge disintegration methods are generally based on the disruption of microbial cell walls by shear stresses. Stirred ball mills, high pressure homogenisers and mechanical jet smash techniques have been used for mechanical treatment application although the most used technique is sludge sonication [5,7]. Sonication is a combination

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78 Mechanical sludge disintegration methods are generally based on the disruption 79 of microbial cell walls by shear stress. Stirred ball mills, high pressure homogenisers 80 and mechanical jet smash techniques have been used for mechanical pre-treatment 81 application although the most used technique is sludge sonication [6-10].

Anaerobic digestion and dewatering characteristics of ...

Mechanically disintegrated excess sludge J3J The excess sludge was disintegrated by a stirred ball mill (Netzsch, type LME 4) and a high-pressure homogenizer (APV-Gaulin, LAB 60), an ultrasonic homogenizer (B.Braun, Labsonic L) and a shear-gap homogenizer (IKA, Ultra T~rrax T2S).

Mechanical disintegration of sewage sludge.

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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Kinetic Disintegration Systems – KDS | PacWest Global

The grinding energy consumption of 30-40 kW hr/ton is competitive with that of small ball mills. Unlike ball mills, the KDS machine reuses that grinding energy to dry the coal, hence is actually more efficient. With the KDS Micronex™, it is possible to increase the value of lower grade coals which have limited use at present.

Disintegration of sewage sludges and influence on ...

The excess sludge was disintegrated by a stirred ball mill (Netzsch, LME 4), a high-pressure homogenizer (APY-Gaulin, LAB 60), an ultrasonic homogenizer (B. Braun, Labsonic L) and a shear-gap homogenizer (lKA, Ultra Turrax T25). The excess sludge was treated with different operational parameters.

Sludge Reduction Technologies in Wastewater Treatment ...

Sludge Reduction Technologies in Wastewater Treatment Plants is a review of the sludge reduction techniques integrated in wastewater treatment plants with detailed chapters on the most promising and most widespread techniques. The aim of the book is to update the international community on the current status of knowledge and techniques in the field of …

Mechanical disintegration of sewage sludge

10.1016/j.cej.2007.02.020 | 10.1016/j.cej.2007 ... - DeepDyve

1 Introduction Anaerobic digestion is a sludge treatment process used in many municipal wastewater treatment plants (MWWTP) to stabilize organic matter. Mass reduction, methane production and, improved dewatering properties of the treated sludge are the main features of the process [1] . Slow degradation of sewage sludge is a disadvantage of ...

Microbial growth reduction in sewage sludge by stirred ...

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 …

NEW APPROACHES TO MINIMIZE EXCESS SLUDGE IN …

NEW APPROACHES TO MINIMIZE EXCESS SLUDGE IN ACTIVATED SLUDGE SYSTEMS G H Chen, K J An, S. Saby, and H K Mo . ... Disintegration:Sludge . ... • Stirred Ball Mills (SBM) • High Pressure Homogenizers (HPH) • Ultrasonic Homogenizers (UH)