CFD simulation of anaerobic granular sludge reactors: A review

D’Bastiani, Camila; Kennedy, David; Reynolds, Anthony

doi:10.1016/j.watres.2023.120220

Cited by 12 publications

(3 citation statements)

References 70 publications

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“…For the preparation of nanoparticles using SCF technology, simulating the experimental process involves solid, liquid, and SCF phases. Considering different phase velocities and interactions, the computational cost of conducting three-phase simulations using CFD tools may be high [108]. This is often simplified to solid-liquid two-phase simulation.…”

Section: Challenges and Opportunitiesmentioning

confidence: 99%

Simulation and Optimization: A New Direction in Supercritical Technology Based Nanomedicine

Huang,

Zheng,

et al. 2023

Bioengineering

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In recent years, nanomedicines prepared using supercritical technology have garnered widespread research attention due to their inherent attributes, including structural stability, high bioavailability, and commendable safety profiles. The preparation of these nanomedicines relies upon drug solubility and mixing efficiency within supercritical fluids (SCFs). Solubility is closely intertwined with operational parameters such as temperature and pressure while mixing efficiency is influenced not only by operational conditions but also by the shape and dimensions of the nozzle. Due to the special conditions of supercriticality, these parameters are difficult to measure directly, thus presenting significant challenges for the preparation and optimization of nanomedicines. Mathematical models can, to a certain extent, prognosticate solubility, while simulation models can visualize mixing efficiency during experimental procedures, offering novel avenues for advancing supercritical nanomedicines. Consequently, within the framework of this endeavor, we embark on an extensive review encompassing the application of mathematical models, artificial intelligence (AI) methodologies, and computational fluid dynamics (CFD) techniques within the medical domain of supercritical technology. We undertake the synthesis and discourse of methodologies for calculating drug solubility in SCFs, as well as the influence of operational conditions and experimental apparatus upon the outcomes of nanomedicine preparation using supercritical technology. Through this comprehensive review, we elucidate the implementation procedures and commonly employed models of diverse methodologies, juxtaposing the merits and demerits of these models. Furthermore, we assert the dependability of employing models to compute drug solubility in SCFs and simulate the experimental processes, with the capability to serve as valuable tools for aiding and optimizing experiments, as well as providing guidance in the selection of appropriate operational conditions. This, in turn, fosters innovative avenues for the development of supercritical pharmaceuticals.

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Section: Challenges and Opportunitiesmentioning

confidence: 99%

Simulation and Optimization: A New Direction in Supercritical Technology Based Nanomedicine

Huang,

Zheng,

et al. 2023

Bioengineering

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“…Anaerobic-aerobic coupling technologies can be used for nutrient recovery in the swine wastewater resource management process (Figure 3) [48]. Among them, various methods are applied, including internal circulating anaerobic reactor (IC) and anaerobic migration sludge bed reactor (AMBR) [49]. By employing anaerobic-aerobic coupling technology, NH 4 + -N removal efficiencies can reach up to 99% for concentrations exceeding 200 mg/L [50].…”

Section: Further Optimizing the Resource Efficiency Of Anaerobic-aero...mentioning

confidence: 99%

Resource and Energy Utilization of Swine Wastewater Treatment: Recent Progress and Future Directions

Meng,

Jin,

Feng

et al. 2023

Separations

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Livestock and poultry farming, as a crucial component of agricultural production, poses a substantial threat to the ecological environment due to the discharge of wastewater. In recent years, researchers have proposed various resource treatment technologies for livestock and poultry breeding wastewater. However, a comprehensive discussion regarding the limitations and avenues for optimizing resource utilization technologies for livestock and poultry farming wastewater treatment is notably absent in existing literature. This paper takes swine wastewater as an illustrative case and undertakes a review of the advantages, disadvantages, and optimization directions of resource treatment technologies, including physical and chemical technology, microbial metabolism, microbial electrochemistry, constructed wetlands, and microalgae-based techniques. Based on mass balance, the recovery rates of various treatment technologies are estimated, and it was found that microbial electrochemistry and constructed wetland techniques may become the mainstream for resource utilization in the future. Furthermore, this paper emphasizes that in addition to resource efficiency, the optimization of resource utilization technologies for swine wastewater should also focus on the following aspects: (1) striking a balance between environmental impact and economic benefits; (2) reducing the cost of resource and energy utilization; and (3) safeguarding environmental and ecological security.

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“…Computational fluid dynamics (CFD) have gained recognition as an emerging modeling tool for wastewater treatment processes in terms of their dynamic behavior [13]. The commonly used model in the field of anaerobic digestion is ADM1 [14].…”

Section: Introductionmentioning

confidence: 99%

Performance and Energy Utilization Efficiency of an Expanded Granular Sludge Bed Reactor in the Treatment of Cassava Alcohol Wastewater

Xu,

Ji,

Zheng

et al. 2023

Energies

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In recent years, expanded granular sludge blanket (EGSB) reactor has been widely used in the treatment of high-concentration organic wastewater, but its research mainly focused on treatment efficiency and microbial community composition. There were few studies on the relationship of operation conditions and energy utilization efficiency. Therefore, the methanogenic characteristics and energy utilization efficiency of EGSB reactor were studied by using cassava alcohol wastewater (CAW) as a raw material at (36 ± 1) °C. The results show that the degradation of volatile fatty acids (VFAs) is an important step affecting methane generation compared to the hydrolysis stage. When organic load rate (OLR) was 12.73 gCOD/L·d, the chemical oxygen demand (COD) removal rate was above 95%, the methane production efficiency of raw material was 202.73 mLCH4/ gCOD·d, the four-stage conversion efficiency was the highest, and the energy utilization efficiency was 62.26%, which was the optimal stage for EGSB reactor to treat CAW. These findings support high-efficiency bioenergy recovery from CAW in practice and highlight the potential wide application of high-performance anaerobic reactors for CAW.

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CFD simulation of anaerobic granular sludge reactors: A review

Cited by 12 publications

References 70 publications

Simulation and Optimization: A New Direction in Supercritical Technology Based Nanomedicine

Simulation and Optimization: A New Direction in Supercritical Technology Based Nanomedicine

Resource and Energy Utilization of Swine Wastewater Treatment: Recent Progress and Future Directions

Performance and Energy Utilization Efficiency of an Expanded Granular Sludge Bed Reactor in the Treatment of Cassava Alcohol Wastewater

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