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Li G, Yu Y, Li X, Jia H, Ma X, Opoku PA. Research progress of anaerobic ammonium oxidation (Anammox) process based on integrated fixed-film activated sludge (IFAS). ENVIRONMENTAL MICROBIOLOGY REPORTS 2024; 16:e13235. [PMID: 38444262 PMCID: PMC10915381 DOI: 10.1111/1758-2229.13235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 01/18/2024] [Indexed: 03/07/2024]
Abstract
The integrated fixed-film activated sludge (IFAS) process is considered one of the cutting-edge solutions to the traditional wastewater treatment challenges, allowing suspended sludge and attached biofilm to grow in the same system. In addition, the coupling of IFAS with anaerobic ammonium oxidation (Anammox) can further improve the efficiency of biological denitrification. This paper summarises the research progress of IFAS coupled with the anammox process, including partial nitrification anammox, simultaneous partial nitrification anammox and denitrification, and partial denitrification anammox technologies, and describes the factors that limit the development of related processes. The effects of dissolved oxygen, influent carbon source, sludge retention time, temperature, microbial community, and nitrite-oxidising bacteria inhibition methods on the anammox of IFAS are presented. At the same time, this paper gives an outlook on future research focus and engineering practice direction of the process.
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Affiliation(s)
- Guang Li
- Key Laboratory of Songliao Aquatic Environment, Ministry of EducationJilin Jianzhu UniversityChangchunChina
| | - Yunyong Yu
- Key Laboratory of Songliao Aquatic Environment, Ministry of EducationJilin Jianzhu UniversityChangchunChina
| | - Xingyu Li
- Key Laboratory of Songliao Aquatic Environment, Ministry of EducationJilin Jianzhu UniversityChangchunChina
| | - Hongsheng Jia
- Key Laboratory of Songliao Aquatic Environment, Ministry of EducationJilin Jianzhu UniversityChangchunChina
| | - Xiaoning Ma
- Key Laboratory of Songliao Aquatic Environment, Ministry of EducationJilin Jianzhu UniversityChangchunChina
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Waqas S, Harun NY, Arshad U, Laziz AM, Sow Mun SL, Bilad MR, Nordin NAH, Alsaadi AS. Optimization of operational parameters using RSM, ANN, and SVM in membrane integrated with rotating biological contactor. CHEMOSPHERE 2024; 349:140830. [PMID: 38056711 DOI: 10.1016/j.chemosphere.2023.140830] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/24/2023] [Accepted: 11/26/2023] [Indexed: 12/08/2023]
Abstract
Membrane fouling is a critical bottleneck to the widespread adoption of membrane separation processes. It diminishes the membrane permeability and results in high operational energy costs. The current study presents optimizing the operating parameters of a novel rotating biological contactor (RBC) integrated with an external membrane (RBC + ME) that combines membrane technology with an RBC. In the RBC + ME, the membrane panel is placed external to the bioreactor. Response surface methodology (RSM) is applied to optimize the membrane permeability through three operating parameters (hydraulic retention time (HRT), rotational disk speed, and sludge retention time (SRT)). The artificial neural networks (ANN) and support vector machine (SVM) are implemented to depict the statistical modelling approach using experimental data sets. The results showed that all three operating parameters contribute significantly to the performance of the bioreactor. RSM revealed an optimum value of 40.7 rpm disk rotational speed, 18 h HRT and 12.4 d SRT, respectively. An ANN model with ten hidden layers provides the highest R2 value, while the SVM model with the Bayesian optimizer provides the highest R2. RSM, ANN, and SVM models reveal the highest R-square values of 0.97, 0.99, and 0.99, respectively. Machine learning techniques help predict the model based on the experimental results and training data sets.
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Affiliation(s)
- Sharjeel Waqas
- Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia.
| | - Noorfidza Yub Harun
- Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia.
| | - Ushtar Arshad
- Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia
| | - Afiq Mohd Laziz
- Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia
| | - Serene Lock Sow Mun
- Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia
| | - Muhammad Roil Bilad
- Faculty of Integrated Technologies, Universiti Brunei Darussalam, Jalan Tungku Link BE1410, Brunei
| | - Nik Abdul Hadi Nordin
- Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak, Malaysia
| | - Ahmad S Alsaadi
- Chemical Engineering Department, University of Jeddah, Jeddah, 21589, Saudi Arabia
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Wu NP, Zhang Q, Tan B, Li M, Lin B, He J, Su JH, Shen HN. Integrated fixed-film activated sludge systems in continuous-flow and batch mode acclimated from low to high aniline concentrations: Performance, mechanism and metabolic pathways. BIORESOURCE TECHNOLOGY 2023; 379:129043. [PMID: 37044153 DOI: 10.1016/j.biortech.2023.129043] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/05/2023] [Accepted: 04/08/2023] [Indexed: 05/03/2023]
Abstract
Integrated fixed-film activated sludge (IFAS) system has considerable advantages in treating aniline wastewater economically and efficiently. However, the response mechanism of IFAS to aniline needs further study. Herein, IFAS in continuous-flow (CF-IFAS) and batch mode (B-IFAS) were set up to investigate it. The removal efficiency of aniline exceeded 99% under different stress intensities. At low stress intensity (aniline ≈ 200 mg/L), the total nitrogen removal efficiency of B-IFAS was approximately 37.76% higher than CF-IFAS. When the stress intensity increased (aniline ≥ 400 mg/L), both were over 82%. CF-IFAS was restrained by denitrification while nitrification in B-IFAS. The legacy effect of perturbation of B-IFAS made microflora quickly reach new stability. The closer interspecific relationship in B-IFAS and more key species: Leucobacter, Rhodococcus, Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium, Ellin6067 and norank_f_NS9_marine_group. Metabolic and Cell growth and death were the most abundant metabolic pathways, resulting both systems the excellent pollutant removal and stability under high stress intensity.
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Affiliation(s)
- Nan-Ping Wu
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Qian Zhang
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China.
| | - Bin Tan
- CCCC Second Highway Consultants Co., Ltd., Wuhan 430056, PR China
| | - Meng Li
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Bing Lin
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Jing He
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Jun-Hao Su
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Hao-Nan Shen
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
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