Mainstream wastewater treatment in integrated fixed film activated sludge (IFAS) reactor by partial nitritation/anammox process

2015 ◽  
Vol 198 ◽  
pp. 478-487 ◽  
Author(s):  
Andriy Malovanyy ◽  
Jozef Trela ◽  
Elzbieta Plaza
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Partial Nitritation ◽  
Fixed Film ◽  
Anammox Process

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.

scholarly journals Loofah Sponges as Bio-Carriers in a Pilot-Scale Integrated Fixed-Film Activated Sludge System for Municipal Wastewater Treatment

2020 ◽  
Vol 12 (11) ◽  
pp. 4758
Author(s):  
Huyen T.T. Dang ◽  
Cuong V. Dinh ◽  
Khai M. Nguyen ◽  
Nga T.H. Tran ◽  
Thuy T. Pham ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Pilot Scale ◽  
Agricultural Product ◽  
Aeration Tank ◽  
Municipal Wastewater Treatment ◽  
Treatment Processes ◽  
Fixed Film ◽  
The Cost

Fixed-film biofilm reactors are considered one of the most effective wastewater treatment processes, however, the cost of their plastic bio-carriers makes them less attractive for application in developing countries. This study evaluated loofah sponges, an eco-friendly renewable agricultural product, as bio-carriers in a pilot-scale integrated fixed-film activated sludge (IFAS) system for the treatment of municipal wastewater. Tests showed that pristine loofah sponges disintegrated within two weeks resulting in a decrease in the treatment efficiencies. Accordingly, loofah sponges were modified by coating them with CaCO3 and polymer. IFAS pilot tests using the modified loofah sponges achieved 83% organic removal and 71% total nitrogen removal and met Vietnam’s wastewater effluent discharge standards. The system achieved considerably high levels of nitrification and it was not limited by the loading rate or dissolved oxygen levels. Cell concentrations in the carriers were twenty to forty times higher than those within the aeration tank. Through 16S-rRNA sequencing, the major micro-organism types identified were Kluyvera cryocrescens, Exiguobacterium indicum, Bacillus tropicus, Aeromonas hydrophila, Enterobacter cloacae, and Pseudomonas turukhanskensis. This study demonstrated that although modified loofah sponges are effective renewable bio-carriers for municipal wastewater treatment, longer-term testing is recommended.

Mainstream partial nitritation/anammox with integrated fixed-film activated sludge: Combined aeration and floc retention time control strategies limit nitrate production

2020 ◽  
Vol 314 ◽  
pp. 123711 ◽  
Author(s):  
Dries Seuntjens ◽  
Jose M. Carvajal Arroyo ◽  
Michiel Van Tendeloo ◽  
Ioanna Chatzigiannidou ◽  
Janet Molina ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Retention Time ◽  
Control Strategies ◽  
Partial Nitritation ◽  
Time Control ◽  
Nitrate Production ◽  
Fixed Film

scholarly journals Pilot-scale study based on integrated fixed-film activated sludge process for cement industrial wastewater treatment

2021 ◽  
Vol 9 (1) ◽  
pp. 3073-3081
Author(s):  
Mohamed Nabil Ali ◽  
Hanan A Fouad ◽  
Mohamed M Meky ◽  
Rehab M Elhefny
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Industrial Wastewater ◽  
Biological Treatment ◽  
Settling Tank ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Pilot Scale ◽  
Fixed Film ◽  
Air Blower

Due to the lack of freshwater resources in Egypt, cement wastewater treatment was performed to widen the range of the water used in irrigation to face the massive future water scarcity. In this study, integrated fixed-film activated sludge (IFAS) was used as a biological treatment method. A laboratory pilot was established as a simulation of the IFAS process. The scale-pilot consists of a primary sedimentation tank, an IFAS tank equipped with an air blower, and a final settling tank. Three experimental attempts were performed using 3 different bio-carriers. In the first trial, Luffa sponges were used as natural bio-carriers and polyurethane sponges (PU) as artificial bio-carriers in the second trial, in addition to a combination between Luffa and PU sponges as a hybrid bio-carrier in the third trial. After analyzing the physicochemical properties of wastewater at the national research center in Cairo, the removal efficiency of TSS (total suspended solids), COD (chemical oxygen demand) , BOD(biological oxygen demand), TN (total nitrogen), and TP (total phosphorous) was 94.5%, 87.8%, 90.8%, 75.9%, and 69.4%, respectively in case of using the combination between Luffa and PU sponges. It can be concluded that using IFAS process was effective for cement wastewater treatment and the effluent wastewater met the Egyptian code limitations for reuse in agriculture purposes.

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