scholarly journals ELETROCOAGULAÇÃO/ELETROFLOCULAÇÃO PARA TRATAMENTO DE ÁGUAS RESIDUÁRIAS: ELETRODOS NÃO CONVENCIONAIS E ACOPLAMENTO DE TÉCNICAS

Química Nova ◽  
2021 ◽  
Author(s):  
Luís Grecco ◽  
Bárbara Souza ◽  
Bárbara Souza
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Present Moment ◽  
Wastewater Treatment Process ◽  
Treatment Techniques ◽  
Potential Applications ◽  
Electrocoagulation Process ◽  
History Of ◽  
Aluminum Electrodes ◽  
And Performance

ELECTROCOAGULATION/ELECTROFLOCULATION FOR WASTEWATER TREATMENT: NON-CONVENTIONAL ELECTRODES AND COUPLING OF TECHNIQUES. Electrocoagulation-electroflotation (EC) technology is a well-known wastewater treatment process that consists of applying electric current to remove contaminants without requiring the addition of hemicals that can generate secondary pollutants. Once they are the most widely used, iron and aluminum electrodes are considered conventional, however they leave unwanted residues, which will give a yellowish-brown color to the treated water, in the case of iron electrodes, and are associated with potential risks to human health, in the case of aluminum electrodes. In this regard, the study of non-conventional electrodes capable of circumventing those problems is essential for the development of more effective wastewater treatments. In this review article, a brief presentation will be made of the history of electrofloculation followed by a brief discussion of conventional electrodes and the mechanisms that govern the processes of removing contaminants by the electrocoagulation process. Subsequently, the non-conventional electrodes reported in the literature up to the present moment will be presented, as well as their potential, applications and performance when applied in water treatment. Finally, will be discussed the coupling of the electroflotation with other water treatment techniques towards achieving a better-quality reuse water.

Non-Conventional Technologies for the Manufacturing Systems Use in Biological Wastewater Treatment Process

2015 ◽  
Vol 809-810 ◽  
pp. 1573-1578
Author(s):  
Casen Panaitescu ◽  
Monica Emanuela Stoica ◽  
Ciner Fehiman
Keyword(s):  
Wastewater Treatment ◽  
Oxygen Transfer ◽  
Manufacturing Systems ◽  
Wastewater Treatment Plants ◽  
Design Parameters ◽  
Biological Wastewater Treatment ◽  
Wastewater Treatment Process ◽  
Aeration System ◽  
Treatment Technologies ◽  
And Performance

Manufacture of wastewater treatment technologies is an important issue due to the complexity of design parameters and performance. Biological wastewater treatment is a process in which the intensity of oxygen transfer into water is an issue that has been extensively studied but yet insufficiently resolved. The present paper aims to describe an aeration system developed by the author in the laboratory by means of non-conventional technologies, and subsequently implemented in refinery wastewater treatment plants. The aeration system takes the form of modules, which are equipped with a new type of membrane. The analysis of the system performance revealed that oxygen transfer was 62%, specific adsorption of oxygen was 37 % and the specific oxygen transfer was 7%/m. The advantages of this new system are as follows: compared to existing technologies there is a higher rate of oxygen transfer into water; longer life; there are no dead zones in the basin as a result of their location; possibility of operating on separate sections.

Potential Applications of Nanomaterials in Wastewater Treatment

2019 ◽  
pp. 51-61 ◽  
Author(s):  
Hamidreza Sadegh ◽  
Gomaa A. M. Ali
Keyword(s):  
Wastewater Treatment ◽  
Conventional Treatment ◽  
Efficient Treatment ◽  
Treatment Techniques ◽  
Wide Range ◽  
The World ◽  
Potential Applications ◽  
Treatment Technologies ◽  
Quality Water ◽  
The Subject

High-quality water is one of the most important challenges around the world. Conventional techniques of wastewater treatment need to be developed. Therefore, finding sustainable, environmentally friendly, and efficient treatment techniques is required. In this regard, due to the extraordinary potential of nanotechnology resulted from nanoscale size characteristics, recently nanomaterials have been the subject of novel research and development worldwide. In this chapter, the authors review recent development of the direct applications of nanomaterial as an adsorbent in adsorption systems for integrating nanoparticles into conventional treatment technologies for wastewater treatment, especially a wide range of candidate nanomaterials and its properties. In addition, advantages and limitations as compared to existing processes are discussed.

A novel combined electrochemical-magnetic method for water treatment

2012 ◽  
Vol 65 (11) ◽  
pp. 2079-2083 ◽  
Author(s):  
Jorge G. Ibanez ◽  
Jorge Luis Vazquez-Olavarrieta ◽  
Lydia Hernandez-Rivera ◽  
Martin Adolfo Garcia-Sanchez ◽  
Elizabeth Garcia-Pintor
Keyword(s):  
Magnetic Field ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Process ◽  
Pollutant Removal ◽  
Magnetic Method ◽  
Spectroscopic Methods ◽  
Proof Of Concept ◽  
Wastewater Treatment Process ◽  
Metallic Species

Electrocoagulation (EC) is a wastewater treatment process in which aqueous pollutants can be removed by adsorption, entrapment, precipitation or coalescence during a coagulation step produced by electrochemically generated metallic species. When using Fe as the sacrificial electrode, Fe2+ and Fe3+ ions are formed. As Fe3+ species are paramagnetic, this property can in principle be used to facilitate their removal through the application of a magnetic field. In the present work we present a proof-of-concept for a combined electrochemical-magnetic method for pollutant removal. For this approach, the amounts of Fe2+ and Fe3+ produced in an EC cell at various voltages were measured by spectroscopic methods to confirm that Fe3+ species predominate (up to 84%). The effectiveness of the presence of a magnetic field in the precipitation of coagulants from a suspension was confirmed by monitoring the turbidity change versus time with and without exposure to a magnetic field, up to a 30% improvement.

scholarly journals Application of European Approaches to Determination of Technological Indicators of the Best Available Techniques in the Field of Wastewater Treatment

2021 ◽  
pp. 105-116
Author(s):  
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Professional Community ◽  
General Information ◽  
Main Element ◽  
Expert Assessment ◽  
Best Available Techniques ◽  
Treatment Techniques ◽  
The Government

The year 2014 was a turning point in the transition of the main sectors of the Russian economy to a new track of environmental regulation and the introduction of obligations for first category’ s objects of negative environmental impact to receive a unified complex document containing mandatory requirements in the field of environmental protection. The main element in the application for a comprehensive environmental permit is the results of calculations of technological standards based on technological indicators of the best available techniques.The determination of technological indicators of the best available techniques takes place in the process of developing and updating information and technical reference documents (BREFs) on the best available techniques. There is currently no unified methodology for determining the technological indicators of the best available techniques. In the process of determining them in Russia, an expert assessment, a reference to the opinion of the industry professional community, or a compromise between control and supervisory authorities, departmental executive authorities and enterprises prevails. Methods. The authors have obtained a set of data through questionnaires from wastewater treatment plants of various output and water treatment techniques used. We have a developed a unified questionnaire that enables to get general information on the plants under study, as well as detailed information on pollutants’ discharge and the use wastewater treatment techniques. Results. In this article, the technological indicators of the best available technologies in the field of wastewater treatment using centralized wastewater disposal systems of settlements or urban districts were determined based on the proposed European approaches. The results obtained showed that the resulting total range generally corresponds to the values of technological indicators of the best available techniques established by the Government of the Russian Federation for water treatment enterprises. Thus, it is possible to judge the applicability (taking into account the expert assessment) of this approach for determining the technological indicators of the best available techniques in other information and technical reference documents (BREFs).

scholarly journals Wet flue gas desulfurization wastewater treatment with reclaimed water treatment plant sludge: a case study

2018 ◽  
Vol 78 (11) ◽  
pp. 2392-2403 ◽  
Author(s):  
Hong Chen ◽  
Yiyu Wang ◽  
Yanxiao Wei ◽  
Liang Peng ◽  
Bo Jiang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Flue Gas ◽  
Thermal Power ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Flue Gas Desulfurization ◽  
Hunan Province ◽  
Wastewater Treatment Process ◽  
Water Treatment Plant Sludge

Abstract To upgrade a wet flue gas desulfurization (FGD) wastewater treatment process in a typical thermal power plant (TPP) in Hunan province, China, a new concept for reusing polyaluminum chloride (PAC)-based water treatment plant sludge (WTPS) as a coagulant is proposed. Results show that, for an optimal WTPS dosage of 1,000 mg/L, the corresponding removal capacities for suspended solids (SS) and chemical oxygen demand (COD) from the practical FGD wastewater were 58.3% and 40.3%, respectively. Through an advanced treatment with a dosage of 50 mg/L of PAC, pH of 9, and stirring of 150 r/min for 60 s and 50 r/min for 15 min, the total removal efficiencies of SS, COD, and total cadmium (Cd) from the FGD wastewater were 93.7%, 88.8%, and 84.6%, respectively. Therefore, a new modification process (that involves mixing with WTPS – slag cleaner – neutralization – coagulation – sedimentation) was proposed. The proposed process is economically superior, and the average cost for the FGD wastewater treatment was only 1.08 USD/t. This could provide a cost-effective alternative process for upgrading FGD wastewater treatment facilities of TPPs.

scholarly journals Efektifitas Instalasi Pengolahan Air Limbah Rumah Sakit “X” Kabupaten Banjar

2016 ◽  
Vol 13 (1) ◽  
pp. 306
Author(s):  
Arifin Arifin ◽  
Istiqamah Istiqamah ◽  
Sulaiman Hamzani
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Liquid Waste ◽  
Processing System ◽  
Inorganic Materials ◽  
Wastewater Treatment Process ◽  
Measurement Results ◽  
The Media

Abstract: Effectivity of waste water treatment installations in Hospital’s X Banjar Regency.Hospital’s X has a wastewater treatment Installations which began operating from the year 2008 – until now. The system uses the wastewater treatment Installations processing system for aerobic and anaerobic biological in a wastewater treatment process using media hive of bees to do the filtering. In the media there is a biofilm that attached to the media hive of bees to help the process of decomposition of organic and inorganic materials. This research aims to know the performance of waste water treatment installations in Hospital’s X  Banjar Regency. This type of research is descriptive, i.e. describe the performance measurement quality by doing the wastewater treatment Installations for parameters pH, temperature, BOD, COD, TSS, and free Ammonia (NH3-N) and compared with Regulation of South Kalimantan Governor number 04 in 2007 about the raw quality of liquid waste for the activities of the hospital. The research design used observation, interviews and measurements. Method of sampling used composite sampling. The results showed that the performance of the the wastewater treatment Installations at Hospital’s X still hasn't been fullest measurement results from the laboratory, the value of the measurement of BOD, COD, TSS and Ammonia free still not qualify. This is due to the existence of problems on aerobic processing, bak bak bak pengendap end, chlorination and a monitoring that is the abundance of mud that settles in the base of the tub because it never done drain the mud. Efforts to improve the performance of the the wastewater treatment Installations i.e. preferably done drain sludge routinely on the bak-bak processing every 6 months, installing blower manual in aerobic processing and adds additional equalization tubs. Keywords: Effectivity of the wastewater treatment Installations, waste water, hospital

Nanofiber: Applications and Implementation in Advance Water Treatment Techniques

2013 ◽  
Vol 376 ◽  
pp. 97-100
Author(s):  
Muhammad Omer Aijaz ◽  
Shan Faiz ◽  
Ubair Abdus Samad ◽  
Fahad S. Al Mubaddel ◽  
Mohammad Luqman ◽  
...  
Keyword(s):  
Water Treatment ◽  
Water Scarcity ◽  
Polymer Synthesis ◽  
High Potential ◽  
Treatment Techniques ◽  
Recent Developments ◽  
Potential Applications ◽  
Nanofiber Membranes

The development in the field of nanofibers since last decade has reshaped the sense of polymer synthesis. Its high potential has rendered significant contributions in various advance applications. This featured article presents the nanofiber and its potential applications in various scientific and commercial fields. Moreover, the recent developments in the synthesis of nanofiber membranes for ultra and nano filtration of water are tabulated. Keeping the water scarcity problem in mind, many novel membranes (along with raw polymer and solvents) are discussed which are under research or being implemented for ultra and nanofiltration.

Potential Applications of Nanomaterials in Wastewater Treatment

2021 ◽  
pp. 1230-1240
Author(s):  
Hamidreza Sadegh ◽  
Gomaa A. M. Ali
Keyword(s):  
Wastewater Treatment ◽  
Conventional Treatment ◽  
Efficient Treatment ◽  
Treatment Techniques ◽  
Wide Range ◽  
The World ◽  
Potential Applications ◽  
Treatment Technologies ◽  
Quality Water ◽  
The Subject

High-quality water is one of the most important challenges around the world. Conventional techniques of wastewater treatment need to be developed. Therefore, finding sustainable, environmentally friendly, and efficient treatment techniques is required. In this regard, due to the extraordinary potential of nanotechnology resulted from nanoscale size characteristics, recently nanomaterials have been the subject of novel research and development worldwide. In this chapter, the authors review recent development of the direct applications of nanomaterial as an adsorbent in adsorption systems for integrating nanoparticles into conventional treatment technologies for wastewater treatment, especially a wide range of candidate nanomaterials and its properties. In addition, advantages and limitations as compared to existing processes are discussed.

scholarly journals Textile Wastewater Treatment by Electrocoagulation Process using Aluminum Electrodes

2014 ◽  
Vol 2 (1) ◽  
pp. 16-29 ◽  
Author(s):  
Edris Bazrafshan ◽  
Amir Hossein Mahvi ◽  
Mohammad ali Zazouli ◽  
◽  
◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Textile Wastewater ◽  
Electrocoagulation Process ◽  
Aluminum Electrodes ◽  
Textile Wastewater Treatment

Sea Urchins and Circuses: The Modernist Natural Histories of Jean Painlevé and Alexander Calder

2018 ◽  
Vol 13 (2) ◽  
pp. 187-211
Author(s):  
Patricia E. Chu
Keyword(s):  
New Media ◽  
Sea Urchins ◽  
Life Sciences ◽  
Three Dimensional ◽  
Machine Age ◽  
Avant Garde ◽  
History Of ◽  
And Performance ◽  
The One ◽  
Natural Historian

The Paris avant-garde milieu from which both Cirque Calder/Calder's Circus and Painlevé’s early films emerged was a cultural intersection of art and the twentieth-century life sciences. In turning to the style of current scientific journals, the Paris surrealists can be understood as engaging the (life) sciences not simply as a provider of normative categories of materiality to be dismissed, but as a companion in apprehending the “reality” of a world beneath the surface just as real as the one visible to the naked eye. I will focus in this essay on two modernist practices in new media in the context of the history of the life sciences: Jean Painlevé’s (1902–1989) science films and Alexander Calder's (1898–1976) work in three-dimensional moving art and performance—the Circus. In analyzing Painlevé’s work, I discuss it as exemplary of a moment when life sciences and avant-garde technical methods and philosophies created each other rather than being classified as separate categories of epistemological work. In moving from Painlevé’s films to Alexander Calder's Circus, Painlevé’s cinematography remains at the forefront; I use his film of one of Calder's performances of the Circus, a collaboration the men had taken two decades to complete. Painlevé’s depiction allows us to see the elements of Calder's work that mark it as akin to Painlevé’s own interest in a modern experimental organicism as central to the so-called machine-age. Calder's work can be understood as similarly developing an avant-garde practice along the line between the bestiary of the natural historian and the bestiary of the modern life scientist.

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