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The Synergic Relationship Between Industry 4.0 and Lean Management: Best Practices from the Literature

Beatrice Paiva Santos Daisy Valle Enrique Vinicius B.P. Maciel Tânia Miranda Lima Fernando Charrua-Santos Renata Walczak

Management and Production Engineering Review | 2021 | vol. 12 | No 1 | 94-107 | DOI: 10.24425/mper.2021.136875

Keywords industry 4.0 Lean Management advanced technology manufacturing management best practices Industry 4.0

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Abstract

Industry 4.0 promises to make manufacturing processes more efficient using modern technologies like cyber-physical systems, internet of things, cloud computing and big data analytics. Lean Management (LM) is one of the most widely applied business strategies in recent decades. Thus, implementing Industry 4.0 mostly means integrating technologies in companies that already operate according to LM. However, due to the novelty of the topic, research on how LM and Industry 4.0 can be integrated is still under development. This paper explores the synergic relationship between these two domains by identifying six examples of real cases that address LM-Industry 4.0 integration in the extant literature. The goal is to make explicit the best practices that are being implemented by six distinct industrial sectors

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Authors and Affiliations

Beatrice Paiva Santos

1

Daisy Valle Enrique

1 2

Vinicius B.P. Maciel

1

Tânia Miranda Lima

1

Fernando Charrua-Santos

1

Renata Walczak

3

Electromechanical Department, C-MAST, University of Beira Interior, Covilhã, Portugal
Industrial Engineering Department, Federal University of Rio Grande do Sul, Brazil
University of Technology, Warsaw, Poland

Lightweight Security Mechanism to Mitigate Active Attacks in a Mobile Ad-hoc Network

Uthumansa Ahamed Shantha Fernando

International Journal of Electronics and Telecommunications | 2022 | vol. 68 | No 1 | 145-152 | DOI: 10.24425/ijet.2022.139862

Keywords Blackhole lightweight mechanism security simulation

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Abstract

Mobile Ad hoc Network (MANET) is a type of Ad hoc network. General properties of MANET open the network to various security threats. Network layer-based Active attacks are widespread and destructive. Available security solutions contain complex calculations. Therefore, the objective of this research is to propose a lightweight security mechanism to enhance the security of data communications between source and destination nodes in a MANET from network layer-based active attack. Blackhole is used as a network layer-based Active attack. The network performance is evaluated using Packet Delivery Ratio (PDR), Average End-to-End Delay (AEED), Throughput, and Simulation Processing Time at Intermediate Nodes (SPTIN). The controller network was used to compare the performance of each network. During the experiment due to the impact of the blackhole attack, compared to the controller network, the PDR was found to be 0.28%, AEED was infinity and Throughput was 0.33%. The performance of the proposed security mechanism was compared with that of the controller network, and the values of PDR, AEED, Throughput, and SPTIN were found to be 98.0825%, 100.9346%, 99.9988%, and 96.5660%, respectively. The data packet delivery ratio was 100.00% compared to that of the controller network. The network that was affected by a blackhole attack showed a higher amount of ADDR than the controller network and the lowest amount of PDR. The network that was affected by the blackhole showed underperformance compared to the controller network. The proposed security mechanism performs well in PDR, AEED, and Throughput compared to the controller network. The AEED and SPTIN values prove that the proposed solution is free from complex calculations. The scope of the solution can be expanded into a lightweight Intruder Detection System to handle different types of security attacks in MANETs.

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Authors and Affiliations

Uthumansa Ahamed

1

Shantha Fernando

2

Faculty of Applied Sciences, Rajarata University of Sri Lanka, Mihintale, Sri Lanka
University of Moratuwa, Colombo, Sri Lanka

Lane Detection and Tracking Based on Lidar Data

Michael Thuy Fernando León

Metrology and Measurement Systems | 2010 | No 3 | 311-321 | DOI: 10.2478/v10178-010-0027-3

Keywords Lidar lidar fusion lane detection lane tracking

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Abstract

The contribution presents a novel approach to the detection and tracking of lanes based on lidar data. Therefore, we use the distance and reflectivity data coming from a one-dimensional sensor. After having detected the lane through a temporal fusion algorithm, we register the lidar data in a world-fixed coordinate system. To this end, we also incorporate the data coming from an inertial measurement unit and a differential global positioning system. After that stage, an original image of the road can be inferred. Based on this data view, we are able to track the lane either with a Kalman filter or by using a polynomial approximation for the underlying lane model.

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Authors and Affiliations

Michael Thuy

Fernando León

3D Multi-Domain MFS Analysis of Sound Pressure Level Reduction Between Connected Enclosures

Luís Godinho Fernando Branco Paulo Mendes

Archives of Acoustics | 2011 | vol. 36 | No 3 | 575-601 | DOI: 10.2478/v10168-011-0041-9

Keywords Method of Fundamental Solutions domain decomposition closed spaces sound pressure level reduction

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Abstract

In this paper, the authors study the 3D propagation of sound waves between two closed spaces. The separation element between the two rooms is considered to include either a small opening or a homogeneous lightweight panel, coupling the two spaces. A numerical study of this configuration is performed, trying to understand the influence of the position and geometry of this opening in the sound pressure level reduction curve at low and midfrequencies. Additionally, the coupling effect between the two acoustic spaces is analyzed, in order to better understand its importance when determining the sound pressure level reduction. Different boundary conditions are ascribed to the walls of these rooms, simulating both the completely reflecting and partially absorbing surfaces.

The numerical modelling was performed using a multi-domain formulation of the Method of Fundamental Solutions (MFS). The system is composed of two coupled rooms, limited by rigid or by absorbing walls, and separated by a thin wall (tending to null thickness) with a small opening. An experimental validation of the proposed model is presented, comparing its results with those found experimentally for a reduced-scale model. It is important to note that, for such a configuration, a traditional single-domain approach using methods like the MFS or the BEM would lead to undetermined equation systems, and thus the proposed model makes use of a domain decomposition technique.

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Authors and Affiliations

Luís Godinho

Fernando Branco

Paulo Mendes

On the Use of Multi-Harmonic Least-Squares Fitting for THD Estimation in Power Quality Analysis

Pedro Ramos Fernando Janeiro Tomáš Radil

Metrology and Measurement Systems | 2012 | No 2 | 295-306 | DOI: 10.2478/v10178-012-0025-8

Keywords power quality Harmonic analysis Signal reconstruction Spectral analysis Harmonic distortion

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Abstract

The quality of the supplied power by electricity utilities is regulated and of concern to the end user. Power quality disturbances include interruptions, sags, swells, transients and harmonic distortion. The instruments used to measure these disturbances have to satisfy minimum requirements set by international standards. In this paper, an analysis of multi-harmonic least-squares fitting algorithms applied to total harmonic distortion (THD) estimation is presented. The results from the different least-squares algorithms are compared with the results from the discrete Fourier transform (DFT) algorithm. The algorithms are assessed in the different testing states required by the standards.

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Authors and Affiliations

Pedro Ramos

Fernando Janeiro

Tomáš Radil

Comparative Analysis of Three Algorithms for Two-Channel Common Frequency Sinewave Parameter Estimation: Ellipse Fit, Seven Parameter Sine Fit and Spectral Sinc Fit

Pedro Ramos Fernando Janeiro Tomáš Radil

Metrology and Measurement Systems | 2010 | No 2 | DOI: 10.2478/v10178-010-0022-8

Keywords sinewave parameter estimation amplitude and phase measurements seven parameter sine fit ellipse fit spectral sinc fit

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Abstract

In this paper, a comparison analysis of three different algorithms for the estimation of sine signal parameters in two-channel common frequency situations is presented. The relevance of this situation is clearly understood in multiple applications where the algorithms have been applied. They include impedance measurements, eddy currents testing, laser anemometry and radio receiver testing for example. The three algorithms belong to different categories because they are based on different approaches. The ellipse fit algorithm is a parametric fit based on the XY plot of the samples of both signals. The seven parameter sine fit algorithm is a least-squares algorithm based on the time domain fitting of a single tone sinewave model to the acquired samples. The spectral sinc fit performs a fitting in the frequency domain of the exact model of an acquired sinewave on the acquired spectrum. Multiple simulation situations and real measurements are included in the comparison to demonstrate the weaknesses and strong points of each algorithm.

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Authors and Affiliations

Pedro Ramos

Fernando Janeiro

Tomáš Radil

Oligodendrorhynchus hesperides gen. et sp. n. (Heteronemertea) from the Bellingshausen Sea

Fernando Ángel Fernández-Alvarez Nuria Anadón

Polish Polar Research | 2012 | No 1 | 81-98 | DOI: 10.2478/v10183−012−0006−3

Keywords Antarctic Nemertea branched proboscis Oligodendrorhynchus

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Abstract

A new genus and species of heteronemertean from the Antarctic (Bellingshausen Sea), Oligodendrorhynchus hesperides , is described and illustrated. Some morphological features with major systematic significance are following: the mode of branching of the proboscis and its low number of terminal branches; the lack of horizontal lateral cephalic slits but in their place a pair of shallow epidermal depressions; a gelatinous amorphous connective stratum between the outer longitudinal and circular muscle layers; the presence of a rhynchocoelic nerve; isolated fibres of the rhynchocoel circular muscle layer interwoven with bundles of the adjacent body−wall inner longitudinal muscle fibres in the intestinal region. Other anatomical characters which can also be used to distinguish the new taxon from existing heteronemertean species that have a branched proboscis are also discussed.

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Authors and Affiliations

Fernando Ángel Fernández-Alvarez

Nuria Anadón

Abstract metaphorical classes: A perspective from distributed models of conceptual representations

Omid Khatin-Zadeh Zahra Eskandari Hassan Banaruee Fernando Marmolejo-Ramos

Polish Psychological Bulletin | 2019 | vol. 50 | No 2 | 108-113 | DOI: 10.24425/ppb.2019.126025

Keywords distributed models abstract concepts concrete concepts metaphorical class

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Abstract

This article looks at the semantic space of abstract and concrete concepts from the perspective of distributed models of conceptual representations. It focuses on abstract metaphorical classes and the mechanisms through which these concepts are processed. When the metaphor X is a Y is understood, X is included in the abstract metaphorical class of Y. This metaphorical class is abstract because the most of semantic features of Y are filtered out through a suppressiveoriented mode of processing. It is suggested that abstract metaphorical classes of living things are usually defined by a single or a very small set of semantic features. Therefore, such metaphorical classes are highly abstract. On the other hand, abstract metaphorical classes of nonliving things are defined by a relatively larger cluster of semantic features. Therefore, abstract metaphorical classes of nonliving things have a relatively higher degree of concreteness compared to those of living things. In other words, abstract metaphorical classes of living things and nonliving things are rather different in terms of nature and the structure of semantic space.

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Authors and Affiliations

Omid Khatin-Zadeh

Zahra Eskandari

Hassan Banaruee

Fernando Marmolejo-Ramos

Histological changes induced during the biotrophic phase of infection of three potato varieties by Phytophthora infestans (Mont.) de Bary

Astrid Elena Gaviria Luis Fernando Patiño Juan Gonzalo Morales

Journal of Plant Protection Research | 2019 | vol. 59 | No 4 | 465-478 | DOI: 10.24425/jppr.2019.131258

Keywords callose hydrogen peroxide hypersensitive response (HR) late blight disease reactive oxygen species (ROS)

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Abstract

In this study defense responses in three potato varieties with different levels of reaction to the late blight disease caused by Phytophthora infestans were analyzed after inoculation with the pathogen. In the resistant cv. Pastusa Suprema, increased intensity of H2O2 and callose deposit accumulation was observed beginning at 24 hours after inoculation, followed by a hypersensitive response at the inoculation points. In the moderately resistant cv. Diacol-Monserrate, the same responses were observed as in the resistant variety, but with less intensity over time. For the susceptible cv. Diacol-Capiro, the responses observed occurred later than in the other two varieties, subsequent to the advance of the pathogen over extensive necrotic areas. These results suggest that early, intense peroxide and callose accumulation and a hypersensitive response are associated with the observed resistance of the cv. Pastusa Suprema and cv. Diacol-Monserrate to P. infestans.

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Authors and Affiliations

Astrid Elena Gaviria

Luis Fernando Patiño

Juan Gonzalo Morales

Implementation of Goertzel-based frequency estimation for power quality monitoring in embedded measurement systems

Nuno M. Rodrigues Fernando M. Janeiro Pedro M. Ramos

Metrology and Measurement Systems | 2022 | vol. 29 | No 3 | 455-468 | DOI: 10.24425/mms.2022.142270

Keywords power quality frequency estimation non-integer Goertzel frequency interpolation embedded measurement systems

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Abstract

International standards from IEC and IEEE regulate power grid parameters such as theRMSvalue, frequency, harmonic and interharmonic distortion, unbalance or the presence of transients, that are important to assure the quality of distributed power. Standard IEC 61000-4-30 suggests the zero crossing algorithm for the measurement of the power grid frequency, but also states that different algorithms can be used. This paper proposes a new algorithm, the Fractional Interpolated Discrete Fourier Transform, FracIpDFT, to estimate the power grid frequency, suitable for implementation in resource limited embedded measurement systems. It is based on the non-integer Goertzel algorithm followed by interpolation at non-integer multiples of the DFT frequency resolution. The proposed algorithm is validated and its performance compared with other algorithms through numerical simulations. Implementation details of the FracIpDFT in an ARM Cortex M4 processor are presented along with frequency measurement results performed with the proposed algorithm in the developed system.

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Authors and Affiliations

Nuno M. Rodrigues

1

Fernando M. Janeiro

2

Pedro M. Ramos

1

Instituto de Telecomunicações, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
Instituto de Telecomunicações, Universidade de Évora, 7000-671 Évora, Portugal

Virtual Sound Localization by Blind People

Larisa Dunai Ismael Lengua Guillermo Peris-Fajarnés Fernando Brusola

Archives of Acoustics | 2015 | vol. 40 | No 4 | 561-567 | DOI: 10.1515/aoa-2015-0055

Keywords virtual sounds localization Distance azimuth blind people

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Abstract

The paper demonstrates that blind people localize sounds more accurately than sighted people by using monaural and/or binaural cues. In the experiment, blind people participated in two tests; the first one took place in the laboratory and the second one in the real environment under different noise conditions. A simple click sound was employed and processed with non-individual head related transfer functions. The sounds were delivered by a system with a maximum azimuth of 32° to the left side and 32° to the right side of the participant’s head at a distance ranging from 0.3 m up to 5 m. The present paper describes the experimental methods and results of virtual sound localization by blind people through the use of a simple electronic travel aid based on an infrared laser pulse and the time of flight distance measurement principle. The lack of vision is often compensated by other perceptual abilities, such as the tactile or hearing ability. The results show that blind people easily perceive and localize binaural sounds and assimilate them with sounds from the environment.

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Authors and Affiliations

Larisa Dunai

Ismael Lengua

Guillermo Peris-Fajarnés

Fernando Brusola

Ecotoxicological effect of heavy metals in free-living ciliate protozoa of Lake Maracaibo, Venezuela

Fernando Luis Castro Echavez Julio César Marín Leal

Journal of Water and Land Development | 2021 | No 51 | 102-116 | DOI: 10.24425/jwld.2021.139020

Keywords contamination ecotoxicological tests lethal concentration LC50 microbiological indicators of early warning toxicity

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Abstract

Multiple anthropogenic agents have turned Lake Maracaibo into a hypereutrophic environment. Heavy metals resulting from the steel and oil industry augment pollution in the lake. There is a lack of research on the ecotoxicological effect of heavy metals in protozoa. To evaluate the ecotoxicological effect of Cr3+, Cr6+, Cd2+, Pb2+ and Ni2+ on free-living ciliated protozoa and to identify suitable ciliated protozoa candidates for bioindicators of water quality; we estimated the lethal concentration for 50% of the protozoa population (LC50) in samples from two stations (S1: narrow of Maracaibo and S2: South of the lake) using ecotoxicological tests in the Sedgewick–Rafter chamber and Probit analysis. The general toxicity patterns obtained for S1 protozoa (Euplotes sp. and Oxytricha sp.) were Cr3+ > Cd2+ > Pb2+ > Cr6+ > Ni2+; and those corresponding to S2 (Coleps sp. and Chilodonella sp.) were Cr6+ > Cr3+ > Cd2+ > Pb2+ > Ni2+. We found statistically significant difference (p < 0.05) in the LC50 of protozoa exposed to Cr3+, Cr6+, Ni2+ and Pb2+ when comparing the two sampling stations. The differences observed in toxicity patterns are probably the result of various kinds of protozoa adaptation, possibly induced by various sources, levels and incidents of exposure to heavy metals contamination of the protozoa studied and to the physicochemical conditions prevailing in the two selected stations. The levels of tolerance observed in the present study, allow us to infer that S2 ciliates are the most susceptible to the contaminants studied and can be used as possible microbiological indicators that provide early warning in studies of contamination by heavy metals in Lake Maracaibo.

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Authors and Affiliations

Fernando Luis Castro Echavez

1

Julio César Marín Leal

2

University of La Guajira, Faculty of Engineering, Environmental Engineering Program, PICHIHÜEL Research group, km 5 vía a Maicao, 440002, Riohacha, Colombia
University of Zulia, Faculty of Engineering, School of Civil Engineering, Department of Sanitary and Environmental Engineering (DISA), Maracaibo, Venezuela

A Statistical Approach To Prediction Of The CMM Drift Behaviour Using A Calibrated Mechanical Artefact

Eduardo Cuesta Braulio Alvarez Fernando Sanchez-Lasheras Daniel Gonzalez-Madruga

Metrology and Measurement Systems | 2015 | vol. 22 | No 3 | 417-428 | DOI: 10.1515/mms-2015-0033

Keywords multivariate regression models Coordinate Measuring Machine drift behaviour calibration

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Abstract

This paper presents a multivariate regression predictive model of drift on the Coordinate Measuring Machine (CMM) behaviour. Evaluation tests on a CMM with a multi-step gauge were carried out following an extended version of an ISO evaluation procedure with a periodicity of at least once a week and during more than five months. This test procedure consists in measuring the gauge for several range volumes, spatial locations, distances and repetitions. The procedure, environment conditions and even the gauge have been kept invariables, so a massive measurement dataset was collected over time under high repeatability conditions. A multivariate regression analysis has revealed the main parameters that could affect the CMM behaviour, and then detected a trend on the CMM performance drift. A performance model that considers both the size of the measured dimension and the elapsed time since the last CMM calibration has been developed. This model can predict the CMM performance and measurement reliability over time and also can estimate an optimized period between calibrations for a specific measurement length or accuracy level.

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Authors and Affiliations

Eduardo Cuesta

Braulio Alvarez

Fernando Sanchez-Lasheras

Daniel Gonzalez-Madruga

Sensitivity analysis of a new approach to photovoltaic parameters extraction based on the total least squares method

Oumaima Mesbahi Mouhaydine Tlemçani Fernando M. Janeiro Abdeloawahed Hajjaji Khalid Kandoussi

Metrology and Measurement Systems | 2021 | vol. 28 | No 4 | 751-765 | DOI: 10.24425/mms.2021.137707

Keywords photovoltaic modules parameter extraction total least squares MPP sensitivity analysis

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Abstract

The degradation of photovoltaic modules and their subsequent loss of performance has a serious impact on the total energy generation potential. The lack of real-time information on the output power leads to additional losses since the panels may not be operating at their optimal point. To understand the behaviour, numerically simulate the characteristics and identify the optimal operating point of a photovoltaic cell, the parameters of an equivalent electrical circuit must first be identified. The aim of this work is to develop a total least-squares based algorithm which can identify those parameters from the output voltage and current measurements, taking into consideration the uncertainties on both measured quantities. This work presents a comparative study of the Ordinary Least Squares (OLS) and Total Least Squares (TLS) approaches to the estimation of the parameters of a photovoltaic cell.

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Authors and Affiliations

Oumaima Mesbahi

1 2

Mouhaydine Tlemçani

1 2

Fernando M. Janeiro

1 2 3

Abdeloawahed Hajjaji

4

Khalid Kandoussi

4

University of Évora, Department of Mechatronics, R. Romão Ramalho 59, 7000-671 Évora, Portugal
Instrumentation and Control Laboratory, Institute of Earth Sciences, Évora, Portugal
Instituto de Telecomunicações, Lisbon, Portugal
University of Chouaib Doukkali, Energy Engineering Laboratory, National School of Applied Sciences, El Jadida, Morocco

Optimal Support Design for Galleries Located in Poor Quality Rock Mass and Under the Influence of Mining Works

Daniel Vázquez-Silva Maria-Belen Prendes-Gero Martina-Inmaculada Álvarez-Fernández Celestino González-Nicieza Carlos Laín-Huerta Fernando López-Gayarre

Archives of Mining Sciences | 2020 | vol. 65 | No 4 | 851-867 | DOI: 10.24425/ams.2020.135181

Keywords support design back analysis numerical implementation bolt shotcrete yieldable steel arch

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Abstract

In this work, the support of two general galleries located in poor quality rock mass and subjected to the influence of high thickness coal layer exploitations is designed and optimized. The process is carried out in four phases:

A first preliminary support is defined employing different geomechanical classifications and applying the New Austrian Tunnelling Method (NATM) using bolts and shotcrete.

An instrumentation campaign is carried out with the goal of analysing the behaviour of the support. The study noticed the failure of the support due to the time of placement of the different elements.

A back-analysis using the Flac and Phases software has allowed the evaluation of the properties of the rock mass and the support, the study of the influence of the time of placement on the component elements (bolts and shotcrete), and the redefinition of that support.

Subsequently, a new support is designed and optimized through numerical modeling after the start of mining without experience in these sizes of sublevel caving that caused the failure of the previously designed support. The new support is formed by yieldable steel arches that are more suitable to withstand the stresses generated by nearby mining work.

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Authors and Affiliations

Daniel Vázquez-Silva

Maria-Belen Prendes-Gero

Martina-Inmaculada Álvarez-Fernández

Celestino González-Nicieza

Carlos Laín-Huerta

Fernando López-Gayarre

Application of MPLS Tunnel Service L2TP-VPN Optimization Concept with Traffic Engineering Method for Looping-Protection Service Analysis

Lukman Medriavin Silalahi Setiyo Budiyanto Imelda Uli Vistalina Simanjuntak Rukhi Ali Effendi Fernando Agus Dendi Rochendi Irfan Kampono

International Journal of Electronics and Telecommunications | 2023 | vol. 69 | No 1 | 115-120 | DOI: 10.24425/ijet.2023.144339

Keywords MPLS SR-TE Looping Protection L2-VPN VPN QoS

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Abstract

This research began when observations were made on any-to-any-connection services that require QoS (Quality of Service) and tunnel measurements. Tunnel is a technique to interconnect between local networks that are separated through a public network. Research questions found looping caused by traffic issues when sending data in the MPLS service layer-2 tunneling service. Furthermore, this research hypothesis proposes optimizing QoS performance in the application of the SR-TE (Segment Routing-Traffic Engineering) method in the MPLS (Multi-Protocol Label Switching) network and analyzing traffic based on MAC addresses using the looping-protection method. This research contributes to optimizing the MPLS network and is a recommended solution for simplifying control-plane operation, especially the SR-TE method and looping-protection in the L2- VPN MPLS service. The purpose of this study is to analyze the performance of MPLS networks, as well as analyze the application of L2-VPN (Layer 2 Virtual Private Network) MPLS networks. The targeted TKT (Technology Readiness Level) is 3rd-Level, which is an analytical and experimental proof of the MPLS tunnel network model on Layer-2 VPN services. The results of the research concluded that testing the SR-TE method is a solution to simplify the process of labeling data traffic that is global labelling, then the looping-protection method is a solution to eliminate looping indications. The QoS obtained has also shown an "excellent" category based on TIPHON standards.

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Authors and Affiliations

Lukman Medriavin Silalahi

1

Setiyo Budiyanto

1

Imelda Uli Vistalina Simanjuntak

1

Rukhi Ali Effendi

1

Fernando

1

Agus Dendi Rochendi

2

Irfan Kampono

2

Universitas Mercu Buana, Indonesia
Badan Riset dan Inovasi Nasional, Republik Indonesia, Indonesia

Computationally-Efficient Design of a Dynamic System-Level LTE Simulator

Pablo Muñoz Isabel de la Bandera Fernando Ruiz Salvador Luna-Ramírez Raquel Barco Matías Toril Pedro Lázaro Jaime Rodríguez

International Journal of Electronics and Telecommunications | 2011 | vol. 57 | No 3 | DOI: 10.2478/v10177-011-0047-2

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Authors and Affiliations

Pablo Muñoz

Isabel de la Bandera

Fernando Ruiz

Salvador Luna-Ramírez

Raquel Barco

Matías Toril

Pedro Lázaro

Jaime Rodríguez

Effect of hydraulic loading rate and vegetation on phytoremediation with artificial wetlands associated to natural swimming pools

Yans Guardia-Puebla Fernando Pérez-Quintero Suyén Rodríguez-Pérez Víctor Sánchez-Girón Edilberto Llanes-Cedeño Juan Rocha-Hoyos Diana Peralta-Zurita

Journal of Water and Land Development | 2019 | No 40

Keywords artificial wetlands natural swimming pools, phytoremediation, sub-surface flow, Typha domingensis

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Authors and Affiliations

Yans Guardia-Puebla

Fernando Pérez-Quintero

Suyén Rodríguez-Pérez

Víctor Sánchez-Girón

Edilberto Llanes-Cedeño

Juan Rocha-Hoyos

Diana Peralta-Zurita

Evaluation of the impact of anthropogenic activities on surface water quality using a water quality index and environmental assessment

Fernando García-Ávila Magaly Jiménez-Ordóñez Jessica Torres-Sánchez Sergio Iglesias-Abad Rita Cabello Torres César Zhindón-Arévalo

Journal of Water and Land Development | 2022 | No 53 | 58-67 | DOI: 10.24425/jwld.2022.140780

Keywords anthropogenic activities environmental impact assessment principal component analysis (PCA) surface water quality water quality index (WQI)

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Abstract

The article presents an assessment of the effects of anthropogenic activities on the quality of water in four streams flowing through a camp based on a combined assessment of environmental impacts and the water quality index. The quantitative and qualitative assessment of environmental impact was made after identifying the anthropogenic activities carried out in the camp. The water quality index ( WQI) was calculated after monitoring seventeen physicochemical and microbiological variables and the Montoya index was applied. The samples were collected during 48 sampling campaigns, organised over the period of six months in eight stations. Two stations were located in each stream, one before and one after it passed through the camp. The results indicated that streams 1, 3, and 4 show a slight deterioration in water quality, affected by anthropogenic activities carried out in the said camp; meanwhile, stream 2 shows an increasing deterioration in water quality. The water quality of the streams before passing through the camp was determined to be between “uncontaminated” and “acceptable”, while after passing through the camp it was classified between “acceptable” and “slightly contaminated”. The results indicated a non-significant difference between the downstream and upstream WQI values for streams 1, 3, and 4; while stream 2 did show a significant difference in the WQI between upstream and downstream; indicating that anthropogenic activities alter the quality of the water.

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Authors and Affiliations

Fernando García-Ávila

1

e-mail:

ORCID:

Magaly Jiménez-Ordóñez

1

Jessica Torres-Sánchez

1

Sergio Iglesias-Abad

2

e-mail:

ORCID:

Rita Cabello Torres

3

e-mail:

ORCID:

César Zhindón-Arévalo

4

e-mail:

ORCID:

Universidad de Cuenca, Facultad de Ciencias Químicas, Cuenca, 010107, Ecuador
Universidad Católica de Cuenca, Carrera de Ingeniería Ambiental, Ecuador
Universidad César Vallejo, Professional School of Environmental Engineering, Lima, Perú
Universidad Católica de Cuenca, Unidad Académica de Salud y Bienestar, Sede Azogues, Ecuador

Prospects for using wastewater from a farm for algae cultivation: The case of Eastern Colombia

Nestor Andres Urbina-Suarez Andres Fernando Barajas-Solano Janet Bibiana Garcia-Martinez German Luciano Lopez-Barrera Angel Dario González-Delgado

Journal of Water and Land Development | 2022 | No 52 | 172-179 | DOI: 10.24425/jwld.2022.140387

Keywords biological treatment characterisation microalgae monitoring nutrient wastewater

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Abstract

In recent years, the technical and economic feasibility of using microalgae and cyanobacteria has been explored for the removal and exploitation of domestic, agricultural and industrial residual effluents with high C, N and P compounds content. To contribute to the understanding of the process and its technical viability for microalgae growth, the article discusses monitoring, flow determination, and physicochemical characteristics of two types of effluents generated in an experimental farm located in the east of Colombia, before (R1) and after biological treatment (R2). In general, the results showed the reduction of different parameters, such as total dissolved solids (TDS), hardness, salinity and phosphates after treatment with activated sludge. However, the conductivity value obtained in R1 and R2 showed the presence of a pollutant load. These findings can be attributed to the highest concentration of fats and oils in the water during early hours of the day. Finally, although the concentration of nitrates increased from 46.63 to 225.21 mg∙dm–3 and phosphate decreased slightly from 9.65 to 6.21 mg∙dm–3, no inhibition was generated in the microalgae, as evidenced in the growth of the microalgal biomass in effluents after nitrate and phosphate removal above 80%.

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Authors and Affiliations

Nestor Andres Urbina-Suarez

1

e-mail:

ORCID:

Andres Fernando Barajas-Solano

1

e-mail:

ORCID:

Janet Bibiana Garcia-Martinez

1

e-mail:

ORCID:

German Luciano Lopez-Barrera

1

e-mail:

ORCID:

Angel Dario González-Delgado

2

e-mail:

ORCID:

Universidad Francisco de Paula Santander, Faculty of Agricultural and Environmental Sciences, San José de Cúcuta, Colombia
University of Cartagena, Avenida del Consulado Calle 30 No. 48-152, Cartagena, Bolívar, 130001, Colombia

Cultivation of Chlorella sp. for biodiesel production using two farming wastewaters in eastern Colombia

Nestor Andres Urbina-Suarez Andres Fernando Barajas-Solano Janet Bibiana Garcia-Martinez German Luciano Lopez-Barrera Angel Dario Gonzalez-Delgado

Journal of Water and Land Development | 2021 | No 50 | 141-149 | DOI: 10.24425/jwld.2021.138169

Keywords biofuel Chlorella lipids microalgae wastewater

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Abstract

The production of biofuels using wastewater as a microalgae culture medium is a little explored technology, but with potential for success. In order to contribute to the knowledge of these technologies and their technical feasibility for microalgae growth, in this work the Chlorella sp. strain was cultivated in two types of effluents generated in an experimental farm located in eastern Colombia, before and after a biological treatment process. The consumption of the main nutrients that regulate growth and lipid production was evaluated, in order to extract, quantify, characterize and convert them into biodiesel. The results showed that Chlorella sp. growth and lipid production is more favourable in R2 medium of treated water than in R1 medium of raw water, mainly due to phosphorus limitation and higher N-NO3 concentration in R2 compared to R1. In the R2 medium culture, a percentage of 42.54% of long-chain fatty acids was found, which is necessary to obtain a high quality biodiesel. Finally, the best transesterification experiment allowed reaching a fatty acid methyl esters (FAME) percentage of 90.1 ± 2.7%. In general, the results demonstrated the potential viability of using the wastewater generated in the San Pablo farm to produce biomass with lipid content to obtain biodiesel, finding that where the concentration of nutrients, mainly nitrogen, has a great influence on the microalgal metabolism for lipid accumulation.

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Authors and Affiliations

Nestor Andres Urbina-Suarez

1

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Andres Fernando Barajas-Solano

1

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Janet Bibiana Garcia-Martinez

1

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German Luciano Lopez-Barrera

1

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ORCID:

Angel Dario Gonzalez-Delgado

2

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ORCID:

Francisco de Paula Santander University, Cúcuta, Colombia
University of Cartagena, Avenida del Consulado Calle 30 No. 48-152, Cartagena, Bolívar, Colombia

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