scholarly journals Biological performance of integrated fixed film activated sludge (IFAS) process

2019 ◽  
Vol 551 ◽  
pp. 012005 ◽  
Author(s):  
N. M. Zahari ◽  
P. N. Khairuddin ◽  
H. A. Mohiyaden ◽  
L. M. Sidek ◽  
D. Mohamad
Keyword(s):  
Activated Sludge ◽  
Fixed Film ◽  
Biological Performance

scholarly journals Sequencing Batch Integrated Fixed-Film Activated Sludge Membrane Process for Treatment of Tapioca Processing Wastewater

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 875
Author(s):  
Nur Izzati Zaenuddin ◽  
Muhammad Roil Bilad ◽  
Lisendra Marbelia ◽  
Wiratni Budhijanto ◽  
Nasrul Arahman ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Small Scale ◽  
Membrane Cleaning ◽  
Modular Systems ◽  
Cake Layer ◽  
Driven System ◽  
Fixed Film ◽  
Gravity Driven ◽  
Biological Performance

Tapioca processing industries are very popular in the rural community to produce a variety of foods as the end products. Due to their small scales and scattered locations, they require robust modular systems to operate at low capacity with minimum supervision. This study explores the application of a novel sequencing batch-integrated fixed-film activated sludge membrane (SB-IFASM) process to treat tapioca processing wastewater for reuse purposes. The SB-IFASM employed a gravity-driven system and utilizes biofilm to enhance biodegradation without requiring membrane cleaning. The SB-IFASM utilizes the biofilm as a secondary biodegradation stage to enhance the permeate quality applicable for reuse. A lab-scale SB-IFASM was developed, preliminarily assessed, and used to treat synthetic tapioca processing industry wastewater. The results of short-term filtration tests showed the significant impact of hydrostatic pressure on membrane compaction and instant cake layer formation. Increasing the pressure from 2.2 to 10 kPa lowered the permeability of clean water and activated sludge from 720 to 425 and from 110 to 50 L/m2·h bar, respectively. The unsteady-state operation of the SB-IFASM showed the prominent role of the bio-cake in removing the organics reaching the permeate quality suitable for reuse. High COD removals of 63–98% demonstrated the prominence contribution of the biofilm in enhancing biological performance and ultimate COD removals of >93% make it very attractive for application in small-scale tapioca processing industries. However, the biological ecosystem was unstable, as shown by foaming that deteriorated permeability and was detrimental to the organic removal. Further developments are still required, particularly to address the biological stability and low permeability.

Dynamic modeling of nitrogen removal for a three-stage integrated fixed-film activated sludge process treating municipal wastewater

2017 ◽  
Vol 41 (2) ◽  
pp. 237-247 ◽  
Author(s):  
Paul Moretti ◽  
Jean-Marc Choubert ◽  
Jean-Pierre Canler ◽  
Pierre Buffière ◽  
Olivier Pétrimaux ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Dynamic Modeling ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Activated Sludge Process ◽  
Fixed Film

Shelter From The Storm: Integrated Fixed Film Activated Sludge Protects Nitrifiers From Toxic Upsets

2010 ◽  
Vol 2010 (17) ◽  
pp. 679-685 ◽  
Author(s):  
Hyun-su Kim ◽  
Claudia Gunsch ◽  
J. Gellner ◽  
J. Boltz ◽  
Robert G. Freudenberg ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Fixed Film

Calibrating a side-stream membrane bioreactor using Activated Sludge Model No. 1

2005 ◽  
Vol 52 (10-11) ◽  
pp. 359-367 ◽  
Author(s):  
T. Jiang ◽  
X. Liu ◽  
M.D. Kennedy ◽  
J.C. Schippers ◽  
P.A. Vanrolleghem
Keyword(s):  
Activated Sludge ◽  
Biological Behaviour ◽  
Activated Sludge Model ◽  
Effluent Quality ◽  
Side Stream ◽  
Steady State Operation ◽  
Autotrophic Biomass ◽  
Biological Performance ◽  
Activated Sludge Processes ◽  
Influent Wastewater

Membrane bioreactors (MBRs) are attracting global interest but the mathematical modeling of the biological performance of MBRs remains very limited. This study focuses on the modeling of a side-stream MBR system using the Activated Sludge Model No. 1 (ASM1), and compares the results with the modeling of traditional activated sludge processes. ASM1 parameters relevant for the long-term biological behaviour in MBR systems were calibrated (i.e. YH = 0.72gCOD/gCOD, YA = 0.25gCOD/gN, bH = 0.25d−1, bA = 0.080d−1 and fP = 0.06), and generally agreed with the parameters in traditional activated sludge processes, with the exception that a higher autotrophic biomass decay rate was observed in the MBR. Influent wastewater characterization was proven to be a critical step in model calibration, and special care should be taken in characterizing the inert particulate COD (XI) concentration in the MBR influent. It appeared that the chemical–biological method was superior to the physical–chemical method. A sensitivity analysis for steady-state operation and DO dynamics suggested that the biological performance of the MBR system (the sludge concentration, effluent quality and the DO dynamics) are very sensitive to the parameters (i.e. YH, YA, bH, bA μmaxH and μmaxA), and influent wastewater components (XI, Ss, Xs and SNH).

Enhancing the stability and efficiency of the anammox process in plug-flow integrated fixed-film activated sludge (IFAS) reactors through alternating anoxic/aerobic (A3) conditions

2019 ◽  
Vol 5 (6) ◽  
pp. 1102-1112
Author(s):  
Chao Liu ◽  
Wenlong Liu ◽  
Lei Wu ◽  
Yongzhen Peng
Keyword(s):  
Activated Sludge ◽  
Plug Flow ◽  
Fixed Film ◽  
The Stability ◽  
Anammox Process

The breakthrough of this study was the development of plug-flow integrated fixed-film activated sludge (IFAS) reactors operated with alternating anoxic/aerobic (A3) conditions for enhanced anammox processes.

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