Activated sludge processes and recent advances

Tran, ‬Huu-Tuan; Lesage, Geoffroy; Lin, Chitsan; Nguyễn, Thanh Bình; Bui, Xuan‐Thanh; Ky, Nguyen Minh; Nguyen, Duy Hieu; Hoang, Hong-Giang; Nguyen, Dinh Duc

doi:10.1016/b978-0-323-99874-1.00021-x

Cited by 19 publications

(7 citation statements)

References 128 publications

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“…The SVI results show that activated sludge works well and is easily settled. Furthermore, the sludge volume index SVI ranges from 50-150 mL/g indicating good biological activity (Tchobanoglus et al, 2003;Tran et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…In the USBF bioreactor, wastewater enters the anoxic tank and is then combined with activated sludge that has been recycled from the sludge clarifier (Fernández et al, 2001;Tran et al, 2022). The wastewater treatment plant of Le Meridien Saigon Hotel is conducted by using a USBF bioreactor that includes three units as an anoxic zone, an aeration unit, and upflow sludge blanket filtration clarifier (Figure 1).…”

Section: Usbf Bioreactor and Jar-test Usbf Bioreactor Of Le Meridien ...mentioning

confidence: 99%

“…Human activities have largely influenced global environmental issues. The problem of domestic wastewater treatment is being considered by many developed and developing Huynh Ngoc Anh Tuan, Nguyen Tri Quang Hung, Cai Thi Quyen,…-Volume 5 -Issue 4-2023, p.545-555. countries (Tchobanoglus et al, 2003;Tran et al, 2022). Therefore, it must be removed from wastewater to avoid pollution and eutrophication in aquatic systems (Nguyen et al, 2023;Oehmen et al, 2007;).…”

Section: Introductionmentioning

confidence: 99%

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Combined biological and chemical-physical processes for domestic wastewater treatment

2023

EJS

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The present study aims to investigate the possibility of domestic wastewater treatment using biological system combined with chemical-physical processes, including Upflow Sludge Blanket Filtration (USBF) technology and PolyAluminium Chloride (PAC). Experimental results showed that the added PAC content played an essential role in improving the treatment efficiency and reached National Technical Regulation on domestic wastewater QCVN 14:2008/BTNMT (Column A) for BOD5. With Jar-test results, the optimal pH of 7.0 and the PAC dosage of 170 mg/L were recorded with the highest removal efficiencies for suspended solids and organic matter. In the modified USBF bioreactor, the findings illustrated the pollutant removal efficiencies such as Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), and Suspended Solids (SS) were equal to 96.2 ± 1.4%, 85.8 ± 4.4% and 99.3 ± 2.1%, respectively. In the future, this USBF-based advanced technology has the potential to play a significant role in addressing water scarcity through wastewater reclamation and reuse.

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Section: Discussionmentioning

confidence: 99%

Section: Usbf Bioreactor and Jar-test Usbf Bioreactor Of Le Meridien ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combined biological and chemical-physical processes for domestic wastewater treatment

2023

EJS

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“…Wastewater treatment plants play an essential role in preserving the environment and public health contributing significantly to the achievement of multiple Sustainable Development Goals (SDGs, [1]) by promoting environmental sustainability, public health, and socio-economic well-being. In a biological wastewater treatment plant (WWTP), activated sludge process (ASP) is a widely method for carbon and nutrients removal [2,3]. The process aims to reduce the concentration of biodegradable matter and nutrients in the effluent, with the compromise of keeping low sludge production using microorganisms mixed with suspended solids in the mixture to treat domestic and industrial wastewater.…”

Section: Introductionmentioning

confidence: 99%

Inference of the Paramentes of a Bioreactor via Approximate Bayesian Evidence

Farias,

Cruz,

Mulas

2024

Learn. Nonlin. Mod.

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In the context of the recent water crisis, the development and improvement of technologies for efficiently treating wastewater becomes increasingly necessary. Aligned with this, the activated sludge process is widely used in biological wastewater treatment plants to remove carbon and nutrients from wastewater. Although significant advancements have been achieved in recent years in modelling these processes to improve their performance and energy efficiency, the models are still complex and difficult to calibrate using data from real plants. In this work, we use Bayesian inference frameworks to estimate the parameters of the activated sludge process. We employ Gaussian processes to estimate the solution to the differential equations of the activated sludge process model and we fit this estimation to manufactured data of the observations of the wastewater. We find that the use of the Bayesian inference framework outperforms the classical approach in scenarios where measurements are more strongly affected by noise.

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“…O pós-tratamento biológico aeróbio, como o de lodos ativados, é indicado, pois permite uma complementação das reações bioquímicas, resultando na degradação de compostos que, no geral, são dificilmente degradados em ambientes anaeróbios. Além disso, o sistema de lodos ativados é amplamente utilizado em escala real para o tratamento de efluentes industriais, uma vez que é um sistema robusto e capaz de lidar com alterações nas condições dos efluentes (TRAN et al, 2022), problema que é comum no tratamento da vinhaça (MORAES et al, 2015).…”

Section: Introductionunclassified

Biodegradabilidade aeróbia e caracterização de efluentes de sistema UASB-lodos ativados alimentado com resíduos da produção de etanol de 1ª e 2ª geração

Procópio,

Adarme,

Aquino

2023

Cad. Téc. Eng. Sanit. Ambiente.

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Este estudo avaliou o tratamento combinado de vinhaça e hidrolisado hemicelulósico (HH) — efluentes gerados na produção de etanol de 1ª e 2ª geração - em um sistema anaeróbio-aeróbio. O sistema foi alimentado continuamente com vinhaça e HH em uma proporção de 75 – 25% (v/v) e consistiu em um reator anaeróbio de dois estágios (posteriormente operado como reator metanogênico de um único estágio), seguido de um sistema aeróbio de lodos ativados. Sob condições ótimas (TDH = 12h), o póstratamento aeróbio resultou em eficiência de remoção de demanda química de oxigênio (DQO) de 62 ± 9%, com eficiência global do sistema (anaeróbio + aeróbio) de 88 ± 3%. Em relação à biodegradabilidade, o efluente do reator anaeróbio em dois estágios apresentou elevada recalcitrância, levando à necessidade de adição de glicose no início do processo para facilitar a adaptação dos microrganismos aeróbios ao efluente. Já com o reator anaeróbio em apenas um estágio, seu efluente tem maior concentração de ácidos graxos voláteis (AGVs), mais biodegradáveis, o que levou a um aumento na eficiência do pós-tratamento. A caracterização qualitativa mostrou que a maioria dos compostos identificados no afluente foi eficientemente removida pelos microrganismos aeróbios, restando apenas pequenas concentrações de ácidos graxos de cadeia longa (AGCL), estigmasterol e compostos aromáticos no efluente final. O sistema de lodos ativados mostrou-se adequado para funcionar como pós-tratamento da codigestão anaeróbia de vinhaça e HH, sendo capaz de lidar com as flutuações na operação do sistema anaeróbio e fornecer um efluente final de qualidade estável.

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Activated sludge processes and recent advances

Cited by 19 publications

References 128 publications

Combined biological and chemical-physical processes for domestic wastewater treatment

Combined biological and chemical-physical processes for domestic wastewater treatment

Inference of the Paramentes of a Bioreactor via Approximate Bayesian Evidence

Biodegradabilidade aeróbia e caracterização de efluentes de sistema UASB-lodos ativados alimentado com resíduos da produção de etanol de 1ª e 2ª geração

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