• Home
  • Julian D. Muñoz-Sierra
Julian D. Muñoz-Sierra

Julian D. Muñoz-Sierra
Delft University of Technology / KWR Water Research Institute

PhD. EngD.

About

24
Publications
17,576
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
358
Citations
Introduction
Julian Muñoz works at the Department of Water management, Delft University of Technology and at KWR Water Research Institute. Julian does research in Chemical Engineering, Environmental Engineering, Water and Wastewater Technology and Environmental Biotechnology. https://www.kwrwater.nl/en/experts-expertises/experts/julian-munoz-sierra-phd/
Additional affiliations
June 2018 - present
KWR Water Research Institute
Position
  • Researcher
May 2017 - September 2017
University of Illinois, Urbana-Champaign
Position
  • Researcher
February 2013 - present
Delft University of Technology
Position
  • Researcher

Publications

Publications (24)
Article
Full-text available
Treating petrochemical wastewater is a challenge for conventional anaerobic reactors. One example is coal gasification wastewater that, besides its salinity, is rich in toxic and inhibitory aromatics, such as phenol, cresols, and resorcinol. Studies have shown that phenol and p-cresol share the same degradation intermediates, whereas resorcinol is...
Article
Full-text available
High salinity is becoming more common in industrial process water and final effluents, particularly when striving to close water loops. There is limited knowledge on the anaerobic treatment of chemical wastewaters characterized by distinct salinity fluctuations. This study investigates the high and fluctuating salinity effects on the conversion cap...
Article
Full-text available
Phenolic industrial wastewater, such as those from coal gasification, are considered a challenge for conventional anaerobic wastewater treatment systems because of its extreme characteristics such as presence of recalcitrant compounds, high toxicity, and salinity. However, anaerobic membrane bioreactors (AnMBRs) are considered of potential interest...
Article
Full-text available
Closing water loops in chemical industries result in hot and highly saline residual streams, often characterized by high strength and the presence of refractory or toxic compounds. These streams are attractive for anaerobic technologies, provided the chemical compounds are biodegradable. However, under such harsh conditions, effective biomass immob...
Article
Full-text available
Sludge morphology considerably affects the mechanism underlying microbial anaerobic degradation of phenol. Here, we assessed the phenol degradation rate, specific methanogenic activity, electron transport activity, coenzyme F420 concentration, and microbial community structure of five phenol-degrading sludge of varying particle sizes (i.e., < 20, 2...
Article
Full-text available
Anammox process is considered as a promising technology for removing total nitrogen from low-strength ammonium and phenol-containing wastewater. However, it is still a challenge for the anammox process to treat high-strength ammonium and phenol-containing wastewater. A completely separated partial nitritation and anammox (CSPN/A) process was develo...
Article
Full-text available
Anaerobic membrane bioreactors (AnMBRs) offer an attractive option for treating industrial wastewaters under extreme conditions that might hamper granulation, biomass retention and reduce biological activity. This study assesses the long-term performance of an upflow anaerobic sludge blanket reactor (UASB) and an AnMBR treating highly saline phenol...
Article
Nutrient pollution has become a global environmental issue. Innovative biological nutrient removal (BNR) processes are needed to overcome the drawbacks of conventional technologies. This study evaluates the potential of a hybrid 5-stage Bardenpho - moving bed biofilm reactor (MBBR) process for organic carbon and nutrient removal from municipal wast...
Article
Full-text available
This study examined the temperature susceptibility of a continuous-flow lab-scale anaerobic membrane bioreactor (AnMBR) to temperature shifts from 35 °C to 55 °C and its bioconversion robustness treating synthetic phenolic wastewater at 16 gNa+.L-1. During the experiment, the mesophilic reactor was subjected to stepwise temperature increases by 5 °...
Article
Full-text available
Industrial wastewaters are becoming increasingly associated with extreme conditions such as the presence of refractory compounds and high salinity that adversely affect biomass retention or reduce biological activity. Hence, this study evaluated the impact of long-term salinity increase to 20 gNa+.L-1 on the bioconversion performance and microbial...
Article
Anaerobic digester (AD) microbiomes harbor complex, interacting microbial populations to achieve biomass reduction and biogas production, however how they are influenced by operating conditions and feed sludge microorganisms remain unclear. These were addressed by analyzing the microbial communities of 90 full-scale digesters at 51 municipal wastew...
Article
Full-text available
Biomass requires trace metals (TM) for maintaining its growth and activity. This study aimed to determine the effect of TM supplementation and partitioning on the specific methanogenic activity (SMA), with a focus on cobalt and tungsten, during the start-up of two lab-scale Anaerobic Membrane Bioreactors (AnMBRs) treating saline phenolic wastewater...
Article
Methyl isobutyl ketone (MIBK) as a solvent is extensively used for the phenols extraction from the wastewater, so it is unavoidable to expose in the effluent due to the solubility and leakage problem. The present study evaluated the impact of MIBK on phenols degradation in an UASB reactor and analyzed its degradation properties. The results indicat...
Article
Full-text available
The effects of discharge power, voltage/Current, initial concentration, pH, and air flow rate on the oxidative degradation of hydroquinone were investigated, respectively, by a wire–cylinder dielectric barrier discharge reactor under a NaCl concentration of 10 g/L. Results indicated that the removal efficiency of hydroquinone increased from 74.6 to...
Article
The use of phototrophic biofilms in wastewater treatment has been recognized as a potential option for development of new reactor configurations. For better understanding of these systems, a numerical model was developed including relevant microbial processes. As a novelty, this model was implemented in COMSOL Multiphysics, a modern computational e...
Conference Paper
Full-text available
La dependencia del recurso agua en las actividades humanas está creciendo a un ritmo que traerá consigo dificultades para garantizar su sostenibilidad ambiental. Los estudios que enmarcan la gestión de los recursos hídricos requieren de coherencia conceptual y metodológica para afrontar los problemas de disponibilidad y calidad del agua. En esta di...
Article
Full-text available
In the present study a 2^3 factorial design extended to central composite has been used to analyse the effects of a number of variables including the [CO3=/HCO3-] ratio, initial gas pressure and gas-liquid system temperature on the absorption of CO2 into a sodium carbonate/bicarbonate alkaline solution using a simulated biogas as the gas mixture sa...
Conference Paper
Full-text available
La producción biotecnológica de hidrógeno es una alternativa promisoria que ofrece amplias posibilidades. En los últimos años se ha dado prioridad al desarrollo de la fermentación anaerobia de hidrógeno por su capacidad de bioconversión y tratamiento de diversos sustratos contenidos en efluentes residuales industriales. Los cultivos de Clostridium...
Article
Full-text available
Se evalúa el sistema alcalino acuoso carbonato-bicarbonato de sodio para la absorción de CO2 de una mezcla gaseosa, que puede ser aplicado en la conversión de biogás (CH4, CO2) a gas natural, mediante el análisis de una superficie de respuesta. Se analizan los efectos de la concentración de la disolución, la presión inicial del gas y la temperatura...
Article
Full-text available
Se empleó un diseño factorial 2^3 ampliado a central compuesto para investigar los efectos de las variables relación [CO3=/HCO3], presión inicial del gas y temperatura del sistema gas-líquido, en el proceso de absorción de CO2 en una solución alcalina de carbonato-bicarbonato de sodio, utilizando un biogás simulado como mezcla gaseosa problema. Se...

Network

Cited By

Projects

Projects (4)
Project
Industrial wastewaters generated in oil and chemical industries are often characterized by extreme conditions such as the presence of refractory and hazardous chemical compounds, high salinity, high temperatures. Particularly for these extreme types of wastewaters the conventional biological technologies have many limitations, but granular or membrane assisted bio-treatment offers many advantages such as in-reactor bio-augmentation of the required bacterial species and maximized sludge retention times (SRT), ensuring high metabolic conversion properties per unit of reactor volume. In case auto-immobilization or sludge granulation is difficult, application of membrane technology for pre-treating industrial process waters has several striking advantages: i) system compactness, allowing installation at or even inside the industry; ii) production of suspended solids free effluents, simplifying effluent upgrading techniques; iii) full retention of specific bacterial communities that are required for conversion of complex, recalcitrant and hazardous compounds. BioXtreme research focuses on the most suitable technology for this purpose (i.e. anaerobic membrane bioreactors, AnMBrs) to encourage reclamation of process waters for reuse.
Project
www.mmwwrr2017.nl Breakthrough microbiological and molecular techniques have become widely available. We benefit from these techniques to support the development of novel process technologies, and to enhance the performance of water and resource recovery facilities. Microbiological methods offer opportunities to e.g. retrofit existing anaerobic digestion processes using UASB reactors and AnMBRs, intensify biological nutrient removal using granular activated sludge, and develop innovative solutions for dye removal using fungal systems. Strong integration of microbial science into engineering practice can promote these technologies toward innovation successes. Microbiological methods are abundantly used in a descriptive approach to unravel the composition and functioning of microbial communities in wastewater treatment systems. Such insights that can be gained along process efficacy and failure events facilitate the improvement of the operation of already existing installations. Engineering challenges then arise to solve technology adjustments to integrate the newly acquired microbiology insights into application. New incentives of applied research should steer the combination of microbiological and process technological concepts upfront, in a hypothesis-driven approach. Microbiological approaches can provide clear insights for the definition and evaluation of bioprocess variables, and should not be overlooked in the design and operation of waste and water resource recovery facilities. It becomes essential to cohere engineers and microbiologists for the delineation of inspiring ideas to trigger the application of microbiological methods into process design and operation. This brings us to organize MMWWRR 2017 to benefit from world-renowned keynote and workshop lectures, as well as from your excellent platform and poster contributions on this most interesting research field. The organizing committee Marjet Oosterkamp and David Weissbrodt (Symposium Chairs) Henri Spanjers, Jules van Lier, Mark van Loosdrecht, Hongxiao Guo, Victor Garcia Rea, Adrian Gonzalez Ortega Please find the symposium at www.mmwwrr2017.nl