Bibliographies thématiques / TANNERY WASTEWATER TREATMENT, ANAEROBIC DIGESTION, WASTEWATER TREATMENT MODELLING

Littérature scientifique sur le sujet « TANNERY WASTEWATER TREATMENT, ANAEROBIC DIGESTION, WASTEWATER TREATMENT MODELLING »

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Publié le 10 mars 2023

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Articles de revues sur le sujet "TANNERY WASTEWATER TREATMENT, ANAEROBIC DIGESTION, WASTEWATER TREATMENT MODELLING"

Kamara, A., O. Bernard, A. Genovesi, D. Dochain, A. Benhammou et J. P. Steyer. « Hybrid modelling of anaerobic wastewater treatment processes ». Water Science and Technology 43, n^o 1 (1 janvier 2001) : 43–50. http://dx.doi.org/10.2166/wst.2001.0011.

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This paper presents a hybrid approach for the modelling of an anaerobic digestion process. The hybrid model combines a feedforward network, describing the bacterial kinetics, and the a priori knowledge based on the mass balances of the process components. We have considered an architecture which incorporates the neural network as a static model of unmeasured process parameters (kinetic growth rate) and an integrator for the dynamic representation of the process using a set of dynamic differential equations. The paper contains a description of the neural network component training procedure. The performance of this approach is illustrated with experimental data.

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Tie, Ling, et Muttucumaru Sivakumar. « Dairy shed wastewater treatment and modelling by anaerobic digestion technology ». International Journal of Environment and Waste Management 1, n^o 4 (2007) : 321. http://dx.doi.org/10.1504/ijewm.2007.015686.

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Samstag, R. W., J. J. Ducoste, A. Griborio, I. Nopens, D. J. Batstone, J. D. Wicks, S. Saunders, E. A. Wicklein, G. Kenny et J. Laurent. « CFD for wastewater treatment : an overview ». Water Science and Technology 74, n^o 3 (30 mai 2016) : 549–63. http://dx.doi.org/10.2166/wst.2016.249.

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Computational fluid dynamics (CFD) is a rapidly emerging field in wastewater treatment (WWT), with application to almost all unit processes. This paper provides an overview of CFD applied to a wide range of unit processes in water and WWT from hydraulic elements like flow splitting to physical, chemical and biological processes like suspended growth nutrient removal and anaerobic digestion. The paper's focus is on articulating the state of practice and research and development needs. The level of CFD's capability varies between different process units, with a high frequency of application in the areas of final sedimentation, activated sludge basin modelling and disinfection, and greater needs in primary sedimentation and anaerobic digestion. While approaches are comprehensive, generally capable of incorporating non-Newtonian fluids, multiphase systems and biokinetics, they are not broad, and further work should be done to address the diversity of process designs. Many units have not been addressed to date. Further needs are identified throughout, but common requirements include improved particle aggregation and breakup (flocculation), and improved coupling of biology and hydraulics.

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Copp, J. B., E. Belia, S. Snowling et O. Schraa. « Anaerobic digestion : a new model for plant-wide wastewater treatment process modelling ». Water Science and Technology 52, n^o 10-11 (1 novembre 2005) : 1–11. http://dx.doi.org/10.2166/wst.2005.0673.

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This paper describes a new anaerobic digestion model for wastewater treatment systems (MantisAD). The model has been developed specifically for plant-wide wastewater treatment modelling. That is, rather than modelling nitrogen as a series of fractions of other carbonaceous state variables, this new model includes six dedicated nitrogen state variables. This structure makes this new anaerobic model easier to incorporate into plant-wide models by simplifying the aerobic/anaerobic model interfaces. The model is complete and initial success with the model has been achieved. A comprehensive description of the model including a Petersen Matrix representation of the model is included as is a case study in which the model is applied to full-scale anaerobic digesters.

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Passos, Fabiana, Raquel Gutiérrez, Doris Brockmann, Jean-Philippe Steyer, Joan García et Ivet Ferrer. « Microalgae production in wastewater treatment systems, anaerobic digestion and modelling using ADM1 ». Algal Research 10 (juillet 2015) : 55–63. http://dx.doi.org/10.1016/j.algal.2015.04.008.

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Genschow, Elke, Werner Hegemann et Christian Maschke. « Biological sulfate removal from tannery wastewater in a two-stage anaerobic treatment ». Water Research 30, n^o 9 (septembre 1996) : 2072–78. http://dx.doi.org/10.1016/0043-1354(96)00332-6.

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Merkel, Wolf, Alexander Schwarz, Sebastian Fritz, Matthias Reuss et Karlheinz Krauth. « New strategies for estimating kinetic parameters in anaerobic wastewater treatment plants ». Water Science and Technology 34, n^o 5-6 (1 septembre 1996) : 393–401. http://dx.doi.org/10.2166/wst.1996.0575.

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Approaches to mathematical modelling of anaerobic digestion and criteria for reactor design in anaerobic wastewater treatment are based on biological degradation kinetics. Whatever type of kinetics is used, the crucial problem always is reliable parameter estimation. For Monod-type kinetics a concept based on batch and fed-batch techniques is presented, which allows accurate estimation of kinetic parameters Vmax and KS in short-time experiments. Following the method of Optimal Experimental Design, sensitivity analysis is applied to design fed-batch experiments. The paper presents the methodology and results for the anaerobic degradation of acetic acid and discusses further implications of the experimental strategy.

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Sutton, P. M., B. E. Rittmann, O. J. Schraa, J. E. Banaszak et A. P. Togna. « Wastewater as a resource : a unique approach to achieving energy sustainability ». Water Science and Technology 63, n^o 9 (1 mai 2011) : 2004–9. http://dx.doi.org/10.2166/wst.2011.462.

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A wastewater-treatment flowsheet was developed to integrate uniquely designed biological processes with physical-chemical unit processes, allowing conversion of the organic carbon in the wastewater to methane, the removal and recovery of phosphorus and nitrogen from the wastewater, and the production of water suitable for reuse. In the flowsheet, energy is derived from the wastewater by first shunting a large fraction of the organic carbon in the wastewater to a solids slurry which is treated via anaerobic digestion. The anaerobic digestion system consists of focused pulsed (FP) pretreatment coupled to anaerobic membrane bioreactors (MBRs). Computer modelling and simulation results are used to optimize design of the system. Energy generation from the system is maximized and costs are reduced by using modest levels of recycle flow from the anaerobic MBRs to the FP pretreatment step.

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Corominas, Ll, L. Rieger, I. Takács, G. Ekama, H. Hauduc, P. A. Vanrolleghem, A. Oehmen, K. V. Gernaey, M. C. M. van Loosdrecht et Y. Comeau. « New framework for standardized notation in wastewater treatment modelling ». Water Science and Technology 61, n^o 4 (1 février 2010) : 841–57. http://dx.doi.org/10.2166/wst.2010.912.

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Many unit process models are available in the field of wastewater treatment. All of these models use their own notation, causing problems for documentation, implementation and connection of different models (using different sets of state variables). The main goal of this paper is to propose a new notational framework which allows unique and systematic naming of state variables and parameters of biokinetic models in the wastewater treatment field. The symbols are based on one main letter that gives a general description of the state variable or parameter and several subscript levels that provide greater specification. Only those levels that make the name unique within the model context are needed in creating the symbol. The paper describes specific problems encountered with the currently used notation, presents the proposed framework and provides additional practical examples. The overall result is a framework that can be used in whole plant modelling, which consists of different fields such as activated sludge, anaerobic digestion, sidestream treatment, membrane bioreactors, metabolic approaches, fate of micropollutants and biofilm processes. The main objective of this consensus building paper is to establish a consistent set of rules that can be applied to existing and most importantly, future models. Applying the proposed notation should make it easier for everyone active in the wastewater treatment field to read, write and review documents describing modelling projects.

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Hai, N. M., S. Sakamoto, V. C. Le, H. S. Kim, R. Goel, M. Terashima et H. Yasui. « A modified anaerobic digestion process with chemical sludge pre-treatment and its modelling ». Water Science and Technology 69, n^o 11 (29 mars 2014) : 2350–56. http://dx.doi.org/10.2166/wst.2014.164.

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Activated Sludge Models (ASMs) assume an unbiodegradable organic particulate fraction in the activated sludge, which is derived from the decay of active microorganisms in the sludge and/or introduced from wastewater. In this study, a seasonal change of such activated sludge constituents in a municipal wastewater treatment plant was monitored for 1.5 years. The chemical oxygen demand ratio of the unbiodegradable particulates to the sludge showed a sinusoidal pattern ranging from 40 to 65% along with the change of water temperature in the plant that affected the decay rate. The biogas production in a laboratory-scale anaerobic digestion (AD) process was also affected by the unbiodegradable fraction in the activated sludge fed. Based on the results a chemical pre-treatment using H2O2 was conducted on the digestate to convert the unbiodegradable fraction to a biodegradable one. Once the pre-treated digestate was returned to the digester, the methane conversion increased up to 80% which was about 2.4 times as much as that of the conventional AD process, whilst 96% of volatile solids in the activated sludge was digested. From the experiment, the additional route of the organic conversion processes for the inert fraction at the pre-treatment stage was modelled on the ASM platform with reasonable simulation accuracy.

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Thèses sur le sujet "TANNERY WASTEWATER TREATMENT, ANAEROBIC DIGESTION, WASTEWATER TREATMENT MODELLING"

Gullman, Isak. « Improved prediction of biogas production at Uddebo wastewater treatment plant : Substrate modelling in SIMCA ». Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85463.

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Anaerobic digestion is a complex process, dependent on multiple factors, which can be made more stable and efficient with the help of process models. A more stable process could reduce biogas torching, which increases the amount of renewable energy available for heat- and electricity production and vehicle fuel. Fluctuations in the produced biogas at Uddebo WWTP in Luleå, Sweden, has been observed, where imported industrial waste was suspected to be the cause. The purpose of this master thesis was to increase the predictability of the biogas production at Uddebo WWTP by creating a process model based on historical data. The historical data consisted of quantitative data of the substrates loaded into the anaerobic digestor and biogas collected from the digestor. The results showed that the calculated error between modelled and measured biogas production was <20%, which was considered good. However, due to the demarcation of this report, many variables were ignored in the creation of the model. Further research is therefore a requirement for the model to function properly: The error should be reduced to <10%, This could be done by increasing the period and resolution toinclude and statistically secure fast and seasonal variations. make qualitative modelling easier, i.e., prediction of the biomethane amount in the biogas. The industrial liquid waste storage should be included in the calculation. A more detailed analysis of all substrates is needed to make the comparison between the literature based and measured production more realistic. Expanding the demarcation of the model to also include the environment in the digestor. This could also increase the total amount of biogas produced.

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Arnau, Notari María Rosario. « Hydrodynamic and biochemical Computational Fluid Dynamic modelling of full-scale anaerobic digesters for wastewater treatment ». Doctoral thesis, Universitat Jaume I, 2022. http://dx.doi.org/10.6035/14107.2022.234094.

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Anaerobic digestion is one of the most widely used biological treatments for the stabilisation of sewage sludge, but the effectiveness of the process depends on good mixing. The Computational Fluid Dynamics (CFD) technique allows analysing the mixing and hydrodynamics, so it has been widely used to study anaerobic digestion. In this thesis, hydrodynamics in full-scale digesters have been studied by means of CFD models, evaluating their mixing systems by means of different scenarios according to mixing and design parameters and dead volumes. In a second part, a new CFD solver was developed to couple a biological model with hydrodynamics and applied to a laboratory and a full-scale digester. The last part was devoted to evaluate the hydrodynamic behaviour of biogas bubbles in anaerobic sludge, so that local mixing by biogas bubbles in anaerobic digesters was evaluated. Future work needs to focus on experimental measurements and new two-phase CFD models.
Programa de Doctorat en Tecnologies Industrials i Materials

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Dalmau, Solé Jordi. « Knowledge-based modelling and simulation of operational problems of microbiological origin in wastewater treatment plants ». Doctoral thesis, Universitat de Girona, 2009. http://hdl.handle.net/10803/33690.

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The activated sludge and anaerobic digestion processes have been modelled in widely accepted models. Nevertheless, these models still have limitations when describing operational problems of microbiological origin. The aim of this thesis is to develop a knowledge-based model to simulate risk of plant-wide operational problems of microbiological origin.For the risk model heuristic knowledge from experts and literature was implemented in a rule-based system. Using fuzzy logic, the system can infer a risk index for the main operational problems of microbiological origin (i.e. filamentous bulking, biological foaming, rising sludge and deflocculation). To show the results of the risk model, it was implemented in the Benchmark Simulation Models. This allowed to study the risk model's response in different scenarios and control strategies. The risk model has shown to be really useful providing a third criterion to evaluate control strategies apart from the economical and environmental criteria.
Els processos de fangs activats i digestió anaeròbia estan descrits en models àmpliament acceptats. No obstant, aquests encara tenen limitacions a l'hora de descriure problemes operacionals d'origen microbiològic. L'objectiu és desenvolupar un model basat en el coneixement per simular el risc de problemes operacionals d'origen microbiològic en planta completa. Per al model de risc es va utilitzar coneixement d'experts i de la bibliografia implementat després en un sistema basat en regles. Utilitzant la lògica difusa, el sistema pot inferir un índex de risc per a problemes operacionals d'origen microbiològic (esponjament, escumes, desnitrificació incontrolada i desflocul•lació). Per a mostrar els resultats del model de risc es va implementar i aplicar en els diferents Benchmark Simulation Models. Això ha permés estudiar la resposta del model de risc en diferents escenaris i estratègies de control. El model de risc ha mostrat ser molt útil proporcionant un tercer criteri per a l'avaluació d'estratègies de control a part dels criteris econòmics i ambientals.

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GIACCHERINI, FRANCESCA. « MODELLING TANNERY WASTEWATER TREATMENT TO EVALUATE ALTERNATIVE BIOPROCESSES CONFIGURATIONS ». Doctoral thesis, 2016. http://hdl.handle.net/2158/1089433.

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This study aimed at investigating an alternative treatment train comparing with the existing one to evaluate the technical feasibility of anaerobic digestion of vegetable tannery sludge and the co-digestion of sludge and fleshing. Moreover, the sulphide denitrification was tested to treat both the supernatant (after the digestion process) and the biogas. The process was investigated through both experimental activity and modelling activity. The experimental activity included batch and continuous reactors tests at different scales (bench, laboratory and pilot scales). The modelling activity allowed, in addition to improving understanding of the processes, the evaluation of the alternative configurations. The innovative contributions of this research are: • Testing the anaerobic digestion of recalcitrant and potential inhibitory substrates, such as vegetable tannery sludge and fleshing; • Upgrading the existing models to simulate high solids retention time wastewater treatment plants and sulphur metabolism.

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Gaden, David L. F. « Modelling anaerobic digesters in three dimensions : integration of biochemistry with computational fluid dynamics ». 2013. http://hdl.handle.net/1993/22096.

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Anaerobic digestion is a process that simultaneously treats waste and produces renewable energy in the form of biogas. Applications include swine and cattle waste management, which is still dominated by aerobic digestion, a less environmental alternative. The low adoption rates of anaerobic digestion is partly caused by the lack of modelling basis for the technology. This is due to the complexity of the process, as it involves dozens of interrelated biochemical reactions driven by hundreds of species of micro-organisms, immersed in a three-phase, non-Newtonian fluid. As a consequence, no practical computer models exist, and therefore, unlike most other engineering fields, the design process for anaerobic digesters still relies heavily on traditional methods such as trial and error. The current state-of-the-art model is Anaerobic Digestion Model No. 1 (ADM1), published by the International Water Association in 2001. ADM1 is a bulk model, therefore it does not account for the effects of concentration gradients, stagnation regions, and particle settling. To address this, this thesis works toward the creation of the first three-dimensional spatially resolved anaerobic digestion model, called Anaerobic Digestion Model with Multi-Dimensional Architecture (ADM-MDA), by developing a framework. The framework, called Coupled Reaction-Advection Flow Transient Solver (CRAFTS), is a general reaction solver for single-phase, incompressible fluid flows. It is a novel partial differential and algebraic equation (PDAE) solver that also employs a novel programmable logic controller (PLC) emulator, allowing users to define their own control logic. All aspects of the framework are verified for proper function, but still need validation against experimental results. The biochemistry from ADM1 is input into CRAFTS, resulting in a manifestation of ADM-MDA; however the numerical stiffness of ADM1 is found to conflict with the second order accuracy of CRAFTS, and the resulting model can only operate under restricted conditions. Preliminary results show spatial effects predicted by the CRAFTS model, and non-observable in the bulk model, impact the digester in a non-trivial manner and lead to measurable differences in their respective outputs. A detailed discussion of suggested work to arrive at a practical spatially resolved anaerobic digestion model is also provided.

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Chapitres de livres sur le sujet "TANNERY WASTEWATER TREATMENT, ANAEROBIC DIGESTION, WASTEWATER TREATMENT MODELLING"

Fernandes Del Pozo, David, Damien Batstone et Jim Wicks. « Anaerobic digestion ». Dans CFD Modelling for Wastewater Treatment Processes, 171–94. IWA Publishing, 2022. http://dx.doi.org/10.2166/9781780409030_0171.

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Actes de conférences sur le sujet "TANNERY WASTEWATER TREATMENT, ANAEROBIC DIGESTION, WASTEWATER TREATMENT MODELLING"

Safitri, Anissa Sukma, et Roald Kommedal. « Effect of temperatures on anaerobic granulated biofilm modelling ». Dans 63rd International Conference of Scandinavian Simulation Society, SIMS 2022, Trondheim, Norway, September 20-21, 2022. Linköping University Electronic Press, 2022. http://dx.doi.org/10.3384/ecp192030.

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Anaerobic granulated biomass-based treatment is a sustainable alternative for municipal wastewater treatment. Each granule in the system is comprised of a complex community of anaerobic microorganisms embedded in a biofilm matrix. The aim of this work was to implement a biofilm model for simulation of biogas production and COD removal as observed in an experimental up-flow anaerobic sludge blanket (UASB) reactor system. Additionally, selected scenario simulations were carried out to assess the effect of temperatures (25, 16, and 12 °C) on granulated anaerobic reactor performance at different organic loading rates. The two main model components used are: Dynamic biochemical and physicochemical conversion processes (Anaerobic Digestion Model No. 1) and diffusive mass transfer within the granule (biofilm). The model was implemented in AQUASIM 2.1. Simulations gave insight into non-observables, especially intragranular biomass distribution and substrate profiles, which help our understanding of granule formation and evolution. Results reflected observed effluent COD concentrations and methane production rates at variable temperatures and reactor loadings. Simulations also confirmed observed steady-state reductions in COD removal efficiencies and methane fraction in biogas at increasing organic loading rate. Model simulations also showed intra-granular alkaline pH depth profiles with increasing organic loading rate which may explain calcium-based mineral core formation. The biomass composition and active regions in granules were not significantly affected by organic loading rate. At steady state, organic substrates especially monosaccharides and volatile fatty acids were predicted to degrade approximately within the outer 100 μm. In general, the model can be used as a tool to predict and simulate anaerobic granulated biofilm system performances in UASB reactor.

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