Effects of submicron magnetite particles on granulation of flocculent sludge and process stability in upflow anaerobic sludge blanket reactor

Kim, Jinsu; Choi, Hyung‐Min; Park, Jihun; Lee, Changsoo

doi:10.1016/j.biortech.2022.128205

Cited by 10 publications

(5 citation statements)

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“…Geobacter species often become dominant exoelectrogenic species in methanogenic cultures fed ethanol-rich feedstock. , Although it is not entirely understood, the prevalence can be attributed to the synergetic effects of alcohol dehydrogenation on NADH/NAD + transformation and ATP synthesis to facilitate enzyme expression related to intercellular electrical connections . On the other hand, exoelectrogenic microorganisms tend to be dominated by various bacteria other than Geobacter species when the availability of ethanol is limited. , Community shifts from Geobacter species to other exoelectrogens have been observed with the changes in substrate composition from ethanol-rich to ethanol-absent in magnetite-supplemented AD processes. , Therefore, the presence or absence of certain bacterial species and the changes in their relative abundance, frequently reported in DIET-AD studies, cannot provide conclusive evidence for DIET in AD. Hence, multifaceted analytical techniques of molecular, electrochemical, microscopic, and metabolic assays are essential to address this issue …”

Section: Application Of Eet In Non-bioelectrochemical Systemsmentioning

confidence: 99%

Progress and Prospects for Applications of Extracellular Electron Transport Mechanism in Environmental Biotechnology

Kim,

Baek,

Kim

et al. 2024

ACS EST Eng.

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Extracellular electron transport (EET) is a biological process where microorganisms can donate electrons from the interior of their cells to external electron acceptors or act as electron acceptors to receive electrons from external sources and electrodes. This process often occurs in the surrounding environment or within biofilms, enabling the redox reactions essential for energy metabolism. This review evaluates the latest developments in electron transfer (EET) research in environmental biotechnology, showcasing its varied applications across bioelectrochemical systems (BES), including microbial fuel cells and microbial electrosynthesis for CO 2 upcycling, as well as its utilization in non-BES such as anaerobic digestion and bioleaching for useful resource recovery. The review emphasizes the interdisciplinary approach of EET research, merging microbiology, chemistry, environmental engineering, material science, and system control engineering. This paper provides insights into the performance optimization of EET and the outlook for future industrial and commercial applications. The review also explores the potential applications of EET to mitigate global and environmental challenges, offering innovative biotechnological solutions that pave the way for a sustainable circular bioeconomy.

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Section: Application Of Eet In Non-bioelectrochemical Systemsmentioning

confidence: 99%

Progress and Prospects for Applications of Extracellular Electron Transport Mechanism in Environmental Biotechnology

Kim,

Baek,

Kim

et al. 2024

ACS EST Eng.

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“…Submicron particles usually refer to particles with a particle size of 0.1 µm to 1 µm. Due to the extremely small particle size, the atomic arrangement, electron distribution structure, and crystal structure on the surface of submicron particles are significantly changed compared to those of ordinary particles, so they have completely different special properties in optical, electromagnetic, acoustic, thermal, and other physical properties [1][2][3][4][5]. Submicron particles can be used as additives, cured coatings, and adhesives with excellent physical, chemical, and surface properties, which help to improve product performance [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Submicron Particle Size Using Scattering Angle-Corrected Polarization Difference with High Angular Resolution

Shi,

Zhu,

Yin

et al. 2023

Photonics

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The particle size of submicron particles significantly affects their properties; thus, the accurate measurement of submicron particle size is essential to ensure its excellent properties. Polarized light scattering is an important tool for measuring the particle size of the ensemble of particles in suspension. However, in the existing measurement systems, the polarized scattered light is detected using a CCD detector or an array of single-point detectors. The CCD detector misses a large part of the polarized scattered light due to its narrow detection range of scattering angles, and the array of single-point detectors has the problem of low angular resolution due to the limited number of detectors. According to the above problems, this paper designs a submicron particle size measurement method based on the polarization difference in polarized scattered light with high angular resolution. The vertically and horizontally polarized scattered light was acquired with high angular resolution (angular separation = 2°) over a scattering angle range of 50°–110° using a photomultiplier coupled with a turntable. The scattering angle of the acquired vertically and horizontally polarized scattered light were corrected to eliminate the scattering angle deviations caused by obliquely incident light, and then the polarization difference in the vertically and horizontally polarized scattered light was computed, from which the submicron particle size distribution was inverted subsequently. Experiments were performed using polystyrene microsphere standard particles with particle sizes of 350 nm, 200 nm, and 100 nm. The experimental results show that (1) the Pearson correlation coefficient of the linearly fitted curve of the corrected polarization difference to the theoretical polarization difference is larger than 0.997, and the slope and intercept of the linearly fitted curve are, respectively, close to 1 and 0, indicating that the corrected polarization difference is highly consistent with the theoretical polarization difference; (2) the mean relative error and coefficient of variation of the particle size distribution parameter D50 obtained from the polarization difference with high angular resolution (angular separation = 2°) are better than those of the parameter D50 obtained from the polarization difference with low angular resolution (angular separation = 12°), indicating better accuracy and repeatability of the particle size distribution inverted from the polarization difference with high angular resolution; and (3) for the particle size distribution parameters D10, D50, and D90 obtained from the scattering angle-corrected polarization difference with high angular resolution, the deviation of the measured values from the average value are all smaller than the thresholds given in the international standard, indicating a good repeatability of the proposed method.

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“…Por outro lado, a presença de GAC no reator UASB2 apresentou aspectos operacionais positivos à produção de biogás e degradação do FVWL. O mecanismo de DIET é reconhecido como adequado à reversão de estresse metabólicos de resíduos ricos em particulados e com teores elevados de sólidos (SUN et al, 2020;CUI et al, 2021;KIM et al, 2022;MOU et al, 2022). Por exemplo, Sun et al (2020) mostraram que a velocidade de conversão de AGVs em CH4 foi aumentada com a adição de GAC em reatores anaeróbios alimentados com substrato rico em particulados (lodo de esgoto), revelando rendimentos acima de 120%.…”

Section: O Planejamento Experimentalunclassified

“…Recentes descoberta levantam dúvidas sobre o processo de granulação em reatores UASB ser estimulado pela presença de materiais condutores (MA et al, 2021b;KIM et al, 2022). Ma et al (2021b) sugeriram que a magnetita induziu o desenvolvimento de parceiros sintróficos DIETers organizados em grânulos durante a degradação de resíduo sintético rico em sais.…”

Section: O Planejamento Experimentalunclassified

“…Ma et al (2021b) sugeriram que a magnetita induziu o desenvolvimento de parceiros sintróficos DIETers organizados em grânulos durante a degradação de resíduo sintético rico em sais. Na contramão do achado de Ma et al (2021b), Kim et al (2022) investigaram os efeitos da adição de micropartículas de magnetita na granulação de lodo floculento em reatores UASB alimentados com soro de leite e apontaram que a magnetita estimulou o desenvolvimento de DIETers, porém não estimulou a granulação. Contudo, as diferenças de substratos, fonte de inóculo e condições operacionais podem interferir no processo de granulação, inviabilizando a comparação de ambos os estudos quando ao efeito de granulação dos meios condutores.…”

Section: O Planejamento Experimentalunclassified

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Avaliação de processos sintróficos avançados na digestão anaeróbia de resíduos ricos em carboidratos sob diferentes condições de estresse operacionais

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São Carlos 2023À Jessica Santana, pelo apoio pessoal e tecnológico (teck) na reta final desse trabalho. Pense numa pessoa que puxou minha orelha com muito amor e parceria. Pois, parceiro é parceiro.À "quarta do gole" com os inoxidáveis Guilherme Giglio (Monstro), Alex Marques, Carol Tavares e Rayssa. Apesar da pandemia ter impedido nossos encontros, foram momentos de muita descontração. Monstro, a você dedico meu agradecimento especial pela grande amizade de ex-integrante da estrogonófica XB; essa amizade vai durar a vida, pois te admiro muito.Aos integrantes e agregados da antiga República XB: Rodrigo (Bel), Rodrigo (bobo), Guilherme (Monstro) e Mateus (Teta). Vocês são estrogonoficamente sensíveis e inoxidáveis. Como disse Carro Velho: que as placas tectônicas de suas cabeças abram para a entrada de mais conhecimento.Aos mais que companheiros de trabalho no "Lixão" e agregados: Chagas (o cabeludo mais parceiro), Maira (a guerreira que quer colorir o mundo), Matheus, Nícolas, Isabele e os demais integrantes daquele ambiente maravilhoso.Aos funcionários e técnicos da Embrapa: Chiquinha, Dona Socorro, Adriano e Lílian. Aqui deixo um misto de agradecimento e desculpas pelas inúmeras vezes que eu os perturbei.Ao Men de Sá pelas conversas paralelas de corredores de Embrapa. Você é minha inspiração de ser humano.Aos Professores Rogers Ribeiro e Giovana Tommaso pelo apoio durante a construção dessa tese.À Carol e a Janja, pelo apoio durante minha temporada no LTB. Muito obrigado mesmo por aguentar minha pessoa perturbando vocês duas diariamente. O aprendizado com essas duas bravas mulheres foi moral, pessoal, profissional e social.Aos meus grandes conselheiros de período pandêmico com cafés e bobagem, Mateus Araújo (o capivara que conquistou meu coração), Elias (um menino helps de um coração gigante) e Thiago Ravanini (o ferrugem mais inoxidável que pude conhecer). Aprendi lições de vida, de boas amizades e de respeito com nossas horas de café.Aos amigos que achei em São Carlos: Cebola, Pauleta, Dico, Cegonho, GHDO, Sami, Paulinha, Henrique Dornelles, Lili, Williane e Raquel Costa. Obrigado pela descontração durante o período de pandemia. Tenho mais de mil histórias para contar futuramente.Ao quinteto parada dura Pilar, Pâmela, Felipe Eng e Lucas Fuess por todos os ensinamentos de laboratório e de vida. Que nossa amizade dure muitos artigos, cervejas e risadas.Às reuniões de quinta, onde aprendi muito com as observações conjuntas de todos os colegas do grupo.

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Effects of submicron magnetite particles on granulation of flocculent sludge and process stability in upflow anaerobic sludge blanket reactor

Cited by 10 publications

References 46 publications

Progress and Prospects for Applications of Extracellular Electron Transport Mechanism in Environmental Biotechnology

Progress and Prospects for Applications of Extracellular Electron Transport Mechanism in Environmental Biotechnology

Measurement of Submicron Particle Size Using Scattering Angle-Corrected Polarization Difference with High Angular Resolution

Avaliação de processos sintróficos avançados na digestão anaeróbia de resíduos ricos em carboidratos sob diferentes condições de estresse operacionais

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