scholarly journals Special issue : domestic wastewater treatment symposium.Treatment characteristics of a small-scale combined disposal clarification tank of anaerobic/aerobic circulating bed type with flow-rate adjustable function by water level fluctuation.

1992 ◽  
Vol 21 (10) ◽  
pp. 638-640
Author(s):  
Toru IYO ◽  
Takehiko OGAWA ◽  
Masaharu TADOKORO
Keyword(s):  
Wastewater Treatment ◽  
Water Level ◽  
Flow Rate ◽  
Domestic Wastewater ◽  
Water Level Fluctuation ◽  
Small Scale ◽  
Level Fluctuation ◽  
Special Issue ◽  
Domestic Wastewater Treatment

Sludge thickening performance of mesh filtration process

2004 ◽  
Vol 50 (8) ◽  
pp. 125-133 ◽  
Author(s):  
M.-S. Park ◽  
Y. Kiso ◽  
Y.-J. Jung ◽  
M. Simase ◽  
W.H. Wang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Level ◽  
Domestic Wastewater ◽  
Small Scale ◽  
Mechanical Equipment ◽  
Hydraulic Pressure ◽  
Sludge Treatment ◽  
Filtration System ◽  
Treatment Facilities ◽  
Sludge Thickening

Small-scale wastewater treatment facilities play an important role in improving the aquatic environment in many countries. Although sludge treatment is essential for overall wastewater treatment, it is difficult for small-scale facilities to use mechanical equipment or other facilities. As the first step of the sludge treatment, it is important to develop a convenient sludge thickening process for small-scale facilities. In this work, we examined the sludge thickening performance of a mesh filtration system: the mesh opening sizes of 100-500 μm, and the sludge (3,000-9,000 mg-SS/L) was obtained from a domestic wastewater treatment facility. The filtration was carried out only under the hydraulic pressure between the water level and the effluent port connected to the mesh filter module. The sludge reduction rates were in the range of 85-95% for 6-7 h; the initial filtration rate was very high, but the rate decreased with a decrease in hydraulic pressure due to the reduction of the water level in the vessel. In addition, the effluents (passed through the mesh) contained very low SS and could be directly discharged into the environment.

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