Effect of sludge retention time on inclined plate function, treatment performance and sludge characteristics of inclined plate membrane bioreactors treating municipal wastewater

2015 ◽  
Vol 29 (3) ◽  
pp. 346-352 ◽  
Author(s):  
Suda Ittisupornrat ◽  
Tomohiro Tobino ◽  
Kazuo Yamamoto
Keyword(s):  
Retention Time ◽  
Municipal Wastewater ◽  
Membrane Bioreactors ◽  
Inclined Plate ◽  
Sludge Characteristics ◽  
Treatment Performance ◽  
Sludge Retention Time

Wastewater Treatment by a Submerged Contact Media Process Using Net Plates

1991 ◽  
Vol 23 (10-12) ◽  
pp. 1853-1862 ◽  
Author(s):  
T. Nambu ◽  
K. Kawarura ◽  
M. Kaneko
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Retention Time ◽  
Municipal Wastewater ◽  
Pilot Scale ◽  
Recycled Water ◽  
Operational Conditions ◽  
Treatment Performance ◽  
Conventional Activated Sludge ◽  
Treated Municipal Wastewater

Wastewater treatment by using a series of bioreactors with submerged net plates, on which microbial growths could be developed, was studied to evaluate its treatment performance and to find suitable operational conditions for sufficient BOD and nitrogen removal. A comprehensive experimental study was carried out by using a bench-scale plant which treated artificial wastewater and a pilot-scale plant which treated municipal wastewater. This process treated well the wastewater with higher pollutant loads in comparison with the conventional activated sludge process. The wastewater containing 200 mg BOD/l was reduced to 20 mg BOD/l at the high BOD loading of 1,94 kg/m3 day and the retention time less than 5 hours. Nitrogen removal could be explained well by an index defined as the product of the water temperature and the retention time. When the ratio, in flow rate, of recycled water to influent was 4 and the index was more than 400, nitrogen removal more than 80 % was obtained.

Mathematical Modeling of Aerobic Membrane Bioreactor (MBR) Using Hybrid Activated Sludge Model No. 3 (ASM3)

2010 ◽  
Vol 113-116 ◽  
pp. 1424-1428
Author(s):  
Yu Tian ◽  
Lin Chen ◽  
Xin Ying Su ◽  
Chu Qing Cao
Keyword(s):  
Activated Sludge ◽  
Retention Time ◽  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Recent Trend ◽  
Trial And Error ◽  
Municipal Wastewater Treatment ◽  
Sludge Retention Time ◽  
Microbial Products ◽  
Operating Strategies

Recent trend for membrane bioreactor (MBR) operation was to apply a low sludge retention time (SRT) to decrease the fouling propensity and simplify the overall maintenance. However, the correct control and operation of MBRs under low SRT conditions were not well-established. In this study, modeling of MBR system for municipal wastewater treatment was evaluated using hybrid Activated Sludge Models 3 (ASM3), which helped in determining the control and operating strategies. The experiment-based, manual trial-and-error approach used to calibrate the hybrid ASM3 was verified to be useful for MBR modeling at 30 d sludge retention time (SRT). Furthermore, the consistency relationships among carbon oxygen demanded (COD), soluble microbial products (SMP) and mixed liquor suspended solids (MLSS) were established in the process of modeling, implying that the accurate simulation of MLSS were the prerequisites for the COD and SMP prediction.

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