Efficacy of a high-pressure jet device for excess sludge reduction in a conventional activated sludge process: Pilot-scale demonstration

2017 ◽  
Vol 326 ◽  
pp. 78-86 ◽  
Author(s):  
Hiroyuki Yoshino ◽  
Toshikazu Suenaga ◽  
Tadahiro Fujii ◽  
Tomoyuki Hori ◽  
Akihiko Terada ◽  
...  
Keyword(s):  
High Pressure ◽  
Activated Sludge ◽  
Pilot Scale ◽  
Sludge Reduction ◽  
Activated Sludge Process ◽  
Excess Sludge ◽  
Conventional Activated Sludge ◽  
Excess Sludge Reduction ◽  
Conventional Activated Sludge Process

Possible cause of excess sludge reduction in an oxic-settling-anaerobic activated sludge process (OSA process)

2003 ◽  
Vol 37 (16) ◽  
pp. 3855-3866 ◽  
Author(s):  
Guang-Hao Chen ◽  
Kyoung-Jin An ◽  
Sébastien Saby ◽  
Etienne Brois ◽  
Malik Djafer
Keyword(s):  
Activated Sludge ◽  
Sludge Reduction ◽  
Activated Sludge Process ◽  
Excess Sludge ◽  
Excess Sludge Reduction ◽  
Possible Cause

High rate and compact single sludge pre-denitrification process for retrofit

1994 ◽  
Vol 30 (6) ◽  
pp. 31-40 ◽  
Author(s):  
Hiroyshi Emori ◽  
Hiroki Nakamura ◽  
Tatsuo Sumino ◽  
Tadashi Takeshima ◽  
Katsuzo Motegi ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
High Rate ◽  
Activated Sludge Process ◽  
Nitrogen And Phosphorus ◽  
Conventional Activated Sludge ◽  
Treatment Techniques ◽  
Conventional Activated Sludge Process ◽  
Denitrification Process

For the sewage treatment plants near rivers and closed water bodies in urbanized areas in Japan and European countries, there is a growing demand for introduction of advanced treatment processes for nitrogen and phosphorus from the viewpoints of water quality conservation and environmental protection. In order to remove nitrogen by the conventional biological treatment techniques, it is necessary to make a substantial expansion of the facility as compared with the conventional activated sludge process. In such urbanized districts, it is difficult to secure a site and much capital is required to expand the existing treatment plant. To solve these problems, a compact single sludge pre-denitrification process using immobilized nitrifiers was developed. Dosing the pellets, which are suitable for nitrifiers growth and physically durable, into the nitrification tank of single sludge pre-denitrification process made it possible to perform simultaneous removal of BOD and nitrogen in a retention time equal to that in the conventional activated sludge process even at the low water temperature of about 10 °C. The 3,000 m3/d full-scale conventional activated sludge plant was retrofitted and has been successfully operated.

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