Mario Esparza-Soto

Mario Esparza-Soto
Universidad Autónoma del Estado de México (UAEM) · Centro Interamericano de Recursos del Agua (CIRA)

About

46
Publications
7,759
Reads
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Introduction
Mario Esparza-Soto currently works at the Centro Interamericano de Recursos del Agua (CIRA), Universidad Autónoma del Estado de México (UAEM). Mario does research in Ecological Engineering, Chemical Engineering and Environmental Engineering. His current projects are 'Anaerobic treatment (UASB) of chocolate-industry wastewater at low temperature', 'low-temperature anaerobic co-digestión of organic kitchen waste and waste activated sludge', and 'characterization of effluent organic matter (EfOM) from biological treatment systems by excitation-emission matrix (EEM) Fluorescence'.
Additional affiliations
October 2004 - present
Universidad Autónoma del Estado de México (UAEM)
Position
  • Professor
Description
  • Profesor-investigador de tiempo completo
August 2001 - August 2004
Arizona State University
Position
  • Post
Description
  • Post-Doctoral Researcher

Publications

Publications (46)
Article
It has been found that biomass yield (Yobs) increases as operating temperature decreases in batch reactors fed with synthetic substrate; nevertheless, there is a gap in literature about this phenomenon in pilot-scale reactors treating real industrial wastewaters, such as from the chocolate confectionery industry. Therefore, the effect of low operat...
Article
Full-text available
Two sequential batch reactors (R1 and R2) of aerobic granular sludge (AGS) were inoculated with activated sludge of different origins. The objective was to investigate the granulation and the consistency between the structure of the microbial communities (16S rRNA amplicon sequencing) in each reactor and their metabolic performance (removal of C, N...
Article
A slaughterhouse wastewater (SHW) with high organic load (20240 mg/L COD) was treated by photolysis (PHO) and heterogeneous solar photo-Fenton (HSPF). Direct photolysis showed to be the best treatment at the pH of the sample (6.4), COD, color, total fecal coliforms, sulfates and phosphates were removed in 81.3, 86.5, 99.0, 91.7 and 33.5% respective...
Article
The main objectives of this research were twofold: a) to evaluate the performance of a low-temperature pilot-scale upflow anaerobic sludge blanket (UASB) reactor during the treatment of a chocolate-processing industry wastewater (CIW) with high soluble chemical oxygen demand; and b) to evaluate the performance of two thermal conditioning devices (T...
Article
In this study, acetaminophen (ACT) in an aqueous solution was treated with electrooxidation and photo-electrooxidation processes (PEO). An electrochemical cell was used for the treatment of different concentrations of ACT (10, 50 and 80 mg L-1). A 23 factorial design was proposed, and the variables studied were current intensity 0.5 A (45.45 mA cm-...
Article
Molasses wastewaters (MWWs) such as baker’s yeast and distilleries effluents are usually pretreated by anaerobic, followed by aerobic biodegradation. This removes almost all the BOD, enough for meeting the current discharge standards in many low- and middle-income countries. However, as shown in the present work, the biotreated effluent still conta...
Article
Aqueous solutions of acetaminophen (ACT) were successfully treated using continuous solar galvanic Fenton (SGF) and galvanic Fenton (GF) processes. Definitive screening design (DSD) was used to verify the influence of several experimental parameters and their interactions, the variables were: the pH, initial ACT concentration, presence or absence o...
Article
Full-text available
In the present work, a laboratory scale anaerobic upflow reactor (UASB) was operated with a hydraulic retention time (6 h) and at psychrophilic temperature (< 20 ºC). The UASB reactor treated wastewater from a chocolate industry with two applied organic volumetric loads (OLRapl). Each OLRapl corresponded to an experimental stage: experimental stage...
Article
Mature landfill leachate is among the most difficult effluents to treat because of its complex composition, low biodegradability index and high toxicity. In this study the performances of Galvanic Fenton (GF) and solar Galvanic Fenton (SGF) systems coupled to a biological reactor were evaluated for the remediation of landfill leachate. The SGF and...
Article
The objective of the present study was to determine the optimum operating temperature of lab-scale upflow anaerobic sludge blanket (UASB) reactors during the treatment of a chocolate-processing industry wastewater at medium applied organic loading rates (OLRappl). Four UASB reactors were operated at different temperature (15, 20, 25 and 30 °C) and...
Article
Full-text available
Leachates, particularly those from mature landfills, are difficult to treat by biological processes because of their high toxicity and low biodegradability. Therefore, the development of new treatment technology is necessary. The treatment of landfill leachate by peroxicoagulation and solar peroxicoagulation using a batch electrolytic reactor with...
Article
Los efluentes de reactores de tratamiento biológico contienen una mezcla heterogénea de materia orgánica disuelta (MOD), la cual es de gran importancia conocer debido al impacto que tiene sobre el proceso (calidad del efluente). En esta investigación los componentes de la materia orgánica disuelta (MOD) en un reactor batch secuencial (RBS) de lodos...
Article
Applying ozone to the return flow in an activated sludge (AS) process is a way for reducing the residual solids production. To be able to extend the activated sludge models to the ozone-AS process, adequate prediction of the tri-atoms effects on the particulate COD fractions is needed. In this study, the biomass inactivation, COD mineralization, an...
Chapter
Full-text available
Dissolved organic matter (DOM) is a component of the soil solution and plays an important role in the biological and chemical processes that occur in the soil. In this study, we analyzed three soil samples, one from a temperate climate and two from an arid climate, for the primary purpose to establish a methodology using 3D fluorescence spectroscop...
Article
Full-text available
The aim of this study was to experiment with diIerent concentrations of magnesium chloride (MgCl2) as a coagulant to reduce the color in commercial dye solutions: black, blue and brown. The parameters analyzed according to the Mexican Standards were pH, color, chemical oxygen demand (COD) and total suspended solids (TSS). Additionally, an activated...
Article
Dynamic activated sludge modeling (ASM) and the concept of chemical oxygen demand fractionation utilized by this modeling approach suggested the existence of new strategies for minimization of excess sludge. One of these strategies consists of eliminating the traditional sludge wastage (WAS) and avoiding the buildup of inert solids in the aeration...
Article
Organic matter in water consists of thousands of components, including macroscopic particles, colloids or dissolved macromolecules. Characterization of dissolved organic matter in drinking water is essential to establish its physical-chemical properties and water pollution index. In this work, the dissolved organic matter from 49 groundwater source...
Article
Palabras clave: acidos húmicos, ácidos fúlvicos, proteínas aromáticas, demanda química de oxígeno RESUMEN La materia orgánica en el agua está compuesta por miles de componentes: partículas macroscópicas, coloides o macromoléculas disueltas. Caracterizar la materia orgánica disuelta en el agua para abastecimiento humano es esencial para establecer s...
Article
The fluorescence spectroscopy is an analytical tool used to test water from different origins because it is sensitive, selective and can give a broad spectrum of information on the composition, characteristics, origin and distribution of dissolved organic matter (DOM). The objective of this research was to characterize the effuent DOM of an aerobic...
Article
The fluorescence spectroscopy is an analytical tool used to test water from different origins because it is sensitive, selective and can give a broad spectrum of information on the composition, characteristics, origin and distribution of dissolved organic matter (DOM). The objective of this research was to characterize the effluent DOM of an aerobi...
Article
Full-text available
El modelo número 1 de lodos activados (ASM1), publicado en 1987, hoy es utilizado de manera amplia. La generación de una base de datos de padrones típicos de fraccionamiento de DQO para las aguas residuales municipales (ARM)en México y en América Latina facilitaría el uso de la modelación dinámica y delos simuladores de plantas de tratamiento en la...
Article
Full-text available
Activated Sludge Model N° 1(ASM1), published in 1987, is widely used today. The creation of a database of typical COD fractionation patterns for municipal wastewaters (WW) in Mexico and in Latin America will facilitate the use of dynamic modeling and simulation of WW treatment plants (WWTP) in the sub-region. This research used the physiochemical c...
Article
The aim of this work was to evaluate the performance of a 244-L pilot-scale upflow anaerobic sludge blanket (UASB) reactor during the treatment of chocolate-processing industry wastewater under low-temperature conditions (18 ± 0.6 °C) for approximately 250 d. The applied organic loading rate (OLR) was varied between 4 and 7 kg/m(3)/d by varying the...
Article
The tangential filtration process with effluent membranes was evaluated for the recovery of water for reuse in industrial activities. The membranes were previously treated using biological methods in the experimental plant at the Inter-American Center for Water Resources (ICWR). The most notable effluent characteristics included high turbidity, the...
Article
Full-text available
The ASM1 model is accepted as a reference to predict and understand the processes of organic matter degradation, nitrification and denitrification in systems activated sludge. To calibrate the model, requires estimate kinetic parameters such as the maximum grow rate (µHMAX) and decay (bH) heterotrophic. These parameters have been studied for temper...
Article
Full-text available
The ASM1 model is accepted as a reference to predict and understand the processes of organic matter degradation, nitrification and denitrification in systems activated sludge. To calibrate the model, requires estimate kinetic parameters such as the maximum grow rate (μ HMAX) and decay (b H) heterotrophic. These parameters have been studied for temp...
Article
The tangential filtration process with effluent membranes was evaluated for the recovery of water for reuse in industrial activities. The membranes were previously treated using biological methods in the experimental plant at the Inter-American Center for Water Resources (ICWR). The most notable effluent characteristics included high turbidity, the...
Article
Currently, the method most used for measuring the maximum specific growth rate (μ(Hmax)) of heterotrophic biomass is by respirometry, using growth batch tests performed at high food/microorganism ratio. No other technique has been suggested, although the former approach was criticized for providing kinetic constants that could be unrepresentative o...
Article
Effluent organic matter (EfOM) from activated sludge systems is composed primarily of influent refractory compounds, residual degradable substrate, intermediate products and soluble microbial products (SMPs). Depending on operational conditions (hydraulic and sludge retention time (SRT)), the quantity and quality of EfOM significantly changes. The...
Article
The aim of this work was to evaluate the performance of a pilot-scale upflow anaerobic sludge blanket (UASB) reactor during the treatment of cereal-processing industry wastewater under low-temperature conditions (17 degrees C) for more than 300 days. The applied organic loading rate (OLR(appl)) was gradually increased from 4 to 6 and 8 kg COD(sol)/...
Article
Microalgae can be cultured in photobioreactors to sequester carbon dioxide and produce potentially valuable biomaterials. The goal of the present study was to identify and utilize microalgal strains that are capable of tolerating up to 20% CO2 (gas phase) concentrations under variable light or flue-gas blend conditions and reactor configurations to...
Article
As part of the efforts done to introduce the practice of modeling in Latin America, this research carried out at the North-East WWTP of Monterrey represents the first comprehensive modeling case in Mexico. The main objective was to reproduce the organic carbon removal and sludge production rates of the plant, based on ASM1. Different intermediate s...
Article
The treatment of residual effluent from the food industry was analyzed using microfiltration membranes with a view to its subsequent reuse The most notable characteristics of the effluent were its high DQO, suspended solids and brown coloration The effluent was pretreated biologically in a pilot plant of the CIRA At the end of these processes, the...
Article
The treatment of residual effluent from the food industry was analyzed using microfiltration membranes with a view to its subsequent reuse. The most notable characteristics of the effluent were its high DQO, suspended solids and brown coloration. The effluent was pretreated biologically in a pilot plant of the CIRA. At the end of these processes, t...
Article
Dissolved organic nitrogen (DON) in watersheds may react with disinfectants to form carcinogenic, nitrogenous, disinfection by-products. However, despite the potential significance of DON-mediated reactions, a systematic study has not been conducted for DON occurrence or removal during water treatment. Two seasonal sampling campaigns of raw and fin...
Article
Literature shows that full-scale pure-oxygen activated sludge (O2-AS) wastewater treatment plants (WWTPs) generate effluents with higher dissolved-organic carbon (DOC) concentrations and larger high-molecular-weight fractions compared to air-activated-sludge (Air-AS) WWTP effluents. The purpose of this paper was to evaluate how gas supplied (air vs...
Article
The molecular-weight distribution (MWD) of wastewater dissolved-organic carbon (DOC) was determined in samples from seven full-scale wastewater-treatment plants (WWTPs) that use different biological treatments (air activated sludge [air-AS], pure-oxygen AS [O2-AS], and trickling filters). The research objective was to determine how different biolog...
Article
Full-text available
Algae green, blue–green, and diatom grown in inorganic media produced particulate and dissolved organic carbon DOC. DOC produced by a green-alga contains 25% hydrophobic acids. DOC from all algae had specific ultraviolet absorbance values less than 2.0 m −1 mg/ L −1 . Algae-produced DOC was biologically labile; greater than 60% degraded in bioreact...
Article
Full-text available
Samples of drinking water were collected form over 400 sites throughout northern Mexico, along the US border. Field analysis for positive chlorine residuals were used as indicators for the potential prevention of intestinal diseases, caused by microbial pathogens. Measurable chlorine residuals (>0.05 mgCl2/L) were present in 80% of the samples, ind...
Article
The adsorption of three estrogenic compounds (bisphenol A (BPA), 17beta-estradiol (E2), and 17alpha-ethynyl estradiol (EE2)) on several powdered activated carbons (PAC) was investigated. Without preconcentration, method detection limits (MDL) using high-performance liquid chromatography (HPLC) with fluorescence detection at an excitation wavelength...
Article
Biosorption of high molecular weight humic substances (HS) to activated sludge (AS) biomass may be considered as a preliminary step previous to enzymatic hydrolysis breakdown and biological uptake. Two standard HS, Suwannee River humic and fulvic acids, were biosorbed onto live AS biomass collected from full-scale wastewater treatment plants. Bioso...
Article
Fluorescence measurements (emission scan, synchronous scan, and excitation-emission matrix [EEM] scan) were used to compare characteristics of two sources of dissolved organic carbon (DOC) from distinctly different origins: (i) a standard fulvic acid from the Suwannee River (SRF sample) and (ii) an unfractionated DOC sample from a tertiary wastewat...
Article
Two fractions of extracellular polymer substances (EPSs), soluble and readily extractable (RE), were characterised in terms of their molecular weight distributions (MWD) and 3-D excitation-emission-matrix (EEM) fluorescence spectroscopy signatures. The EPS fractions were different: the soluble EPSs were composed mainly of high molecular weight comp...
Article
Organic matter (OM) of wastewater samples collected from a full-scale activated sludge wastewater treatment plant (WWTP) was characterized in terms of molecular weight distribution and fluorescence signature. This characterization was aimed to identify any possible structural change in WW OM during treatment. The activated sludge system preferentia...

Questions

Question (1)
Question
1-During anaerobic treatment of wastewater, sodium bicarbonate is added for alkalinity and pH control. I already know how to calculate this sodium bicarbonate dose.
2-If a energy mass balance is done around this anaerobic treatment, energy is produced in form of methane, but how could I calculate the energy entering the system in the form of sodium bicarbonate?

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Projects

Project (1)
Project
Determine the best operation conditions for the treatment of industrial wastewater in a UASB reactor at low temperature (18 - 20 ºC)