Progress in Characterization of Sludge Particles

1993 ◽  
Vol 28 (1) ◽  
pp. 145-148 ◽  
Author(s):  
E. Friedrich ◽  
H. Friedrich ◽  
W. Heinze ◽  
K. Jobst ◽  
H.-J. Richter ◽  
...  
Keyword(s):  
Surface Charge ◽  
Size Distribution ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Degradation Process ◽  
Laser Diffraction ◽  
Kinetics Of Degradation ◽  
Kinetics Of

The studies aimed at examining the influences of the particle size distribution and surface charge on the behaviour of sludge in dewatering. It was possible to show that defined size dispersions of sludge particles as well as surface charge are necessary to reach better dewatering results and that the found correlations were independent of the type of sludge and the sewage treatment plant (Friedrich et al., 1990 and 1991). Based on laser diffraction measurements to determine panicle size distribution it was found that it was necessary to set a specific proportion between fine and large sludge particles in order to produce the best possible dewatering results and to get the required shear resistant flocs. To characterize the surface charge of the sludge particles various measuring methods were used. Determining the zeta-potential is a suitable means to describe the kinetics of degradation process in the sludge.

scholarly journals Chemical characterization of vermicompost of sewage sludge with different proportions of diatomaceous material

2017 ◽  
Vol 21 (8) ◽  
pp. 519-523
Author(s):  
Fabíola M. Braga ◽  
Paulo H. S. Cardoso ◽  
Mário H. C. Barbosa ◽  
Márcio N. Rodrigues ◽  
Regynaldo A. Sampaio ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Environmental Sustainability ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Chemical Characterization ◽  
Biofuel Production ◽  
Eisenia Foetida ◽  
Organic Compost

ABSTRACT The pursuit for waste recovery has been the best way to contribute to environmental sustainability. The mix of sewage sludge (SS) from Sewage Treatment Plant with diatomaceous material containing oil (DE), used as a filter in biofuel production, can form a substrate rich in minerals and organic matter through vermicomposting. Therefore, this study aimed to produce vermicompost using worms, Eisenia foetida, from a pre-compost (PC) of sewage sludge and garden pruning residues mixed with different proportions of DE in relation to PC: 0; 7.53; 15.06; 22.59; and 30.12% v/v. The design was randomized complete blocks with five treatment replicates. The chemical characteristics of the vermicompost were analyzed after a period of four months. The proportion of up to 30.12% v/v of DE met the criteria established for agriculture uses, registration and marketing of the product as organic compost in accordance with the Normative Instructions SDA 27/2006 and 25/2009 from the Ministry of Agriculture.

Influence of Sewage Sludge on the Slurrying Properties and Co-Gasification Kinetics of Coal-Sludge Slurries

2013 ◽  
Vol 634-638 ◽  
pp. 239-244
Author(s):  
Bang Yang Zhu ◽  
Han Xu Li ◽  
Jie Yao ◽  
Qiao Liu ◽  
Zi Li Zhang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Fourier Transform ◽  
Sewage Sludge ◽  
Rheological Properties ◽  
Apparent Viscosity ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Coal Sludge ◽  
Kinetics Of

The feature of coal-sludge slurries(CSSs) were studied by mixing Shenhua coal and sewage sludge collected from Huainan sewage treatment plant. The results showed that, the rheological properties of CSSs prepared with the adding dosage from 0 to 15% were the shearing and diluting feature. With the adding dosages of the sludge increase, the apparent viscosity values increased and the maximum solid concentrations of CSSs decreased. Also, the gasification kinetics were studied by Thermogravimetry-Fourier Transform Infrared(TG-FTIR). The gasification starting temperatures and activation energy decreased with the adding dosages of the sludge increase, it indicated that the process was accelerated by sewage sludge.

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