scholarly journals A Novel Rotating Disk System for Disintegration of Excess Sludge

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Ming yang Zhang ◽  
Yun Xiang ◽  
Jian wei Du
Keyword(s):  
Treatment Process ◽  
Rotating Disk ◽  
Excess Sludge ◽  
Industrial Waste Water ◽  
Disk System ◽  
Sludge Treatment ◽  
Conventional Activated Sludge ◽  
System A ◽  
Break Cell ◽  
A Cell

Conventional activated sludge treatment process has been widely employed to deal with a variety of municipal and industrial waste water, but the production of sludge by this method is considerable. It is urgent to find an appropriate method which can solve this problem. Shear force produced by rotating disk system (a cell lysis system) was employed to break cell wall of sludge microorganism in order to release intracellular materials which can be reused as nutrient materials for metabolism of other sludge microorganisms in this study. Special feature on surfaces of disks had been proved to be a novel improvement which can improve disintegration effect apparently. Ultrasonic system can further promote minimization of excess sludge after treatment by rotating disk system in shorter time.

A strategy in wastewater treatment process for significant reduction of excess sludge production

2002 ◽  
Vol 45 (12) ◽  
pp. 127-134 ◽  
Author(s):  
N. Shiota ◽  
A. Akashi ◽  
S. Hasegawa
Keyword(s):  
Wastewater Treatment ◽  
Treatment Process ◽  
Pilot Scale ◽  
Aeration Tank ◽  
Excess Sludge ◽  
Wastewater Treatment Process ◽  
Conventional Activated Sludge ◽  
New Process ◽  
Treatment Step ◽  
Sludge Production

A novel wastewater treatment process (S-TE PROCESS®) with significantly reduced production of excess sludge has been developed. The process consists of two different stages, one for a biological wastewater treatment and the other for a thermophilic aerobic digestion of the resulting sludge. A portion of return sludge from the wastewater treatment step is injected into a thermophilic aerobic sludge digester (TASD), in which the injected sludge is solubilized by the action of thermophilic aerobic bacteria. The solubilized sludge is returned to the aeration tank in the wastewater treatment step for its further degradation. Pilot-scale facilities of the S-TE process and the conventional activated sludge process as a control, both treating the same industrial wastewater, were comparatively operated for totally 270 days. As a result, 93% reduction in overall excess sludge production was achieved in the S-TE operation. The SS solubilization rate in TASD was stable at around 30%. Only a slight increase in the effluent SS and TOC concentrations was observed compared with those of the control facility. Otherwise the removal efficiency of TOC was approximately 95% for both plants. A full-scale plant treating domestic sewage was operated for three years, showing 75% reduction of overall excess sludge production. It was concluded that the new process was feasible.

Effect of earthworms on the performance and microbial communities of excess sludge treatment process in vermifilter

2012 ◽  
Vol 117 ◽  
pp. 214-221 ◽  
Author(s):  
Jing Liu ◽  
Zhibo Lu ◽  
Jian Yang ◽  
Meiyan Xing ◽  
Fen Yu ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Treatment Process ◽  
Excess Sludge ◽  
Sludge Treatment

The fate of lindane in the conventional activated sludge treatment process

Chemosphere ◽  
2004 ◽  
Vol 55 (1) ◽  
pp. 81-91 ◽  
Author(s):  
A.M. Kipopoulou ◽  
A. Zouboulis ◽  
C. Samara ◽  
Th. Kouimtzis
Keyword(s):  
Activated Sludge ◽  
Treatment Process ◽  
Sludge Treatment ◽  
Conventional Activated Sludge

Treatment and Quality of Sewage Sludge in Germany - Results of a Survey

2007 ◽  
Vol 2 (1) ◽  
Author(s):  
A. Meda ◽  
C. Schaum ◽  
M. Wagner ◽  
P. Cornel ◽  
A. Durth
Keyword(s):  
Sewage Sludge ◽  
Treatment Process ◽  
Wastewater Treatment Plants ◽  
Current Status ◽  
Sludge Treatment ◽  
Sewage Sludge Treatment ◽  
Treatment And Disposal ◽  
German Association ◽  
Entire Treatment

TIn 2004, the German Association for Wastewater, Water and Waste (DWA) carried out a survey about the current status of sewage sludge treatment and disposal in Germany. The study covered about one third of the wastewater treatment plants and about two thirds of the entire treatment capacity (expressed in population equivalents) in Germany. This provides an up-to-date and representative database. The paper presents the most important results regarding sludge treatment, process engineering, current disposal paths and sewage sludge quality.

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