Comparative Overview of Different Physical-Chemical Treatments Applied for Real Textile Effluents

2014 ◽  
Vol 1036 ◽  
pp. 58-64 ◽  
Author(s):  
Carmen Zaharia ◽  
Victor Amarandei ◽  
Augustin Muresan
Keyword(s):  
Textile Wastewater ◽  
Operating Regime ◽  
Present Condition ◽  
Environmental Attitude ◽  
Textile Effluents ◽  
Surface Water Resources ◽  
Physical Chemical ◽  
Treated Effluent ◽  
Temperature Operating ◽  
Materials Used

The paper presents different physical-chemical treatment applications for textile effluents (i.e. one-single or mixed treatment stages as coagulation-flocculation, homogenous advanced oxidation with hydrogen peroxide as Fenton-like processes, sorption applied for different textile wastewaters followed by sedimentation and/or filtration). The efficiencies of textile wastewater treatments in terms of effluent quality, treatment degree, and optimal operating parameters (i.e. pH, concentration of chemical reagents and materials used, temperature, operating regime, and time) are discussed, together with some restrictions and recommendations. These data concerning different effluent treatments are useful to the environmental management staff but also to all employees that adopted an environmental attitude (EA) in all them behaviour. The concern of solving inside environmental problems (mainly focused on quality of final effluent discharge in aquatic receptor and/or treated effluent recycling), and acting into an ethical, legal and viable manner is necessary and obligatory in the present condition of fresh water deficit, pollution increasing of natural surface water resources, and its variety and/or complexity.

scholarly journals HOGLA LEAF AS A POTENTIAL BIO-ADSORBENT FOR THE TREATMENT OF REACTIVE DYES IN TEXTILE EFFLUENTS

2020 ◽  
Vol 4 (12) ◽  
pp. 1-7
Author(s):  
Abdul Khalque ◽  
Shaikh Ahammed ◽  
Saquib Khan ◽  
Rabiul Awual ◽  
K.Ayaz Rabbani ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Contact Time ◽  
Reactive Dyes ◽  
Textile Wastewater ◽  
Complete Removal ◽  
Reactive Dye ◽  
Textile Effluents ◽  
Typha Angustata ◽  
Colored Wastewater ◽  
Wastewater Samples

A new bio-adsorbent to remove reactive dyes from textile effluent was investigated in the present study. The adsorbent was the leaves of locally available hogla plant (Typha angustata). Initially, sunfix yellow, a reactive dye widely used in textile effluents, was used to check the removal efficiency in terms of contact time, pH of dye solution and adsorbent dosage. Complete removal (100%) of dye was achieved at adsorbent/dye ratio of 2300:1 at pH 10 with 180 minutes contact time. The adsorbent was then applied to deep colored, raw textile wastewater samples and it was found that 2.3 g of adsorbent was able to convert 100 mL of deep colored wastewater to transparent water at pH 10. Additionally, treatment by the adsorbent resulted in significant decreases in pH, BOD, COD, TS, TDS and TSS of wastewater, while improving the DO level.

Impact of Lagoon Effluent on an Inland Stream – A 10 Year Perspective

1989 ◽  
Vol 21 (2) ◽  
pp. 289-292 ◽  
Author(s):  
G. P. Skerry ◽  
J. G. Parker
Keyword(s):  
Water Quality ◽  
Water Body ◽  
Inland Waterways ◽  
Inland River ◽  
Biological Water ◽  
Physical Chemical ◽  
Treated Effluent ◽  
Receiving Stream ◽  
The Impact ◽  
Biological Water Quality

The discharge of lagoon treated effluent to inland waterways has long been of contention in relation to the impact of residual algal cells and nutrients in the receiving water body, especially a water body used extensively for recreation. This paper examines the pre lagoon and post lagoon discharge effects on water quality in a major inland river over a ten year monitoring period. The impact of a lagoon discharge flow of up to 20 ML/day during summer conditions is assessed in relation to effect on receiving stream physical, chemical and biological water quality indicators and implications for management are assessed and evaluated.

Analysis of the physico-chemical efficiency of the bioceramic silers application in endodontic practice

2021 ◽  
Vol 1 (12) ◽  
pp. 55-58
Author(s):  
Z. S. Khabadze ◽  
Yu. A. Generalova ◽  
Ya. A. Negorelova ◽  
F. R. Ismailov ◽  
E. S. Shilyaeva
Keyword(s):  
Systematic Review ◽  
Clinical Practice ◽  
Antimicrobial Action ◽  
Alkaline Ph ◽  
Review Of The Literature ◽  
Physical Chemical ◽  
Satisfactory Performance ◽  
Physico Chemical ◽  
Chemical Efficiency ◽  
Materials Used

The purpose of this systematic review of the literature is to detail the main physical, chemical, biological, operational, and other significant properties of bioceramic materials used in endodontic practice ю Фccording to the studied literature, we can say that bioceramic endodontic materials have satisfactory performance properties, are characterized by antimicrobial action and alkaline pH, have optimal biocompatibility and bioactivity, which indicates the feasibility of their use in the clinical practice of a dentist-endodontist.

Development of an Improved Compact Package Plant for Small Community Wastewater Treatment

1993 ◽  
Vol 28 (10) ◽  
pp. 283-288
Author(s):  
A. Hulsman ◽  
C. D. Swartz
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
South African ◽  
Wastewater Treatment Plants ◽  
Operating Regime ◽  
Small Community ◽  
Trial Period ◽  
Effluent Quality ◽  
Treated Effluent ◽  
Compact Design

The challenges facing the design and operation of small community wastewater treatment plants are discussed. The package plant concept is considered and the consequent development of a compact intermittently aerated activated sludge package plant is outlined. A four month trial period, comprising the first part of the evaluation, is described. Results from this trial show that the plant can serve communities of up to 300 p.e. and that treated effluent quality conforms to the General South African Standards. The compact design and unique operating regime offer reduced capital and running costs respectively.

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

2016 ◽  
Vol 32 (1) ◽  
pp. 1-47 ◽  
Author(s):  
Archina Buthiyappan ◽  
Abdul Raman Abdul Aziz ◽  
Wan Mohd Ashri Wan Daud
Keyword(s):  
Large Scale ◽  
Heterogeneous Catalysts ◽  
Advanced Oxidation Process ◽  
Advanced Oxidation ◽  
Textile Wastewater ◽  
Reactor Design ◽  
Toxicity Assessment ◽  
Industrial Applications ◽  
Textile Effluents ◽  
Wide Range

AbstractIn the past few years, there have been many researches on the use of different types of homogenous catalyst for the degradation of textile wastewater in conventional advanced oxidation processes (AOPs). However, homogenous AOPs suffer from few limitations, including large consumption of chemicals, acidic pH, high cost of hydrogen peroxide, generation of iron sludge, and necessity of post-treatment. Therefore, recently, there have been more researches that focus on improving the performance of conventional AOPs using heterogeneous catalysts such as titanium dioxide, nanomaterials, metal oxides, zeolite, hematite, goethite, magnetite, and activated carbon (AC). Besides, different supports such as AC that have been incorporated with transition metals and clays have been proven to have excellent catalytic activity in AOPs. This paper presents a comprehensive review of advances and prospects of catalytic AOPs for the decontamination of a wide range of synthetic and real textile wastewater. This review provides an up-to-date critical review of the information on the degradation of various textile dyes by a wide range of heterogeneous catalysts and adsorbents. The future challenges of AOPs, including chemical consumption, toxicity assessment, reactor design, and limitation of catalysts, are discussed in this paper. In addition, this paper also discusses the presence of ions, generation of by-products, and industrial applications of AOPs. Special emphasis is given to recent studies and large-scale combination of AOPs for wastewater treatment. This review paper concludes that more studies are needed for the kinetics, reactor design, and modeling of hybrid AOPs and the production of their corresponding intermediate products and secondary pollutants. A better economic model should also be developed to predict the cost of AOPs, as the treatment cost varies with dyes and textile effluents.

scholarly journals REMOVAL OF HEAVY METALS USING BACTERIAL BIO-FLOCCULANTS OF BACILLUS SP. AND PSEUDOMONAS SP.

2015 ◽  
Vol 23 (4) ◽  
pp. 288-294 ◽  
Author(s):  
Ahmed M. AZZAM ◽  
Ahmed TAWFIK
Keyword(s):  
Heavy Metals ◽  
Removal Efficiency ◽  
Industrial Wastewater ◽  
Textile Wastewater ◽  
Pseudomonas Sp ◽  
Bacillus Sp ◽  
Initial Concentration ◽  
Treated Effluent ◽  
Removal Of Heavy Metals ◽  
Residual Values

Bio-flocculants produced by Bacillus sp. and Pseudomonas sp. were evaluated as flocculating agents for the removal of Cu (II), Pb (II) and Cd (II) from chemical and textile wastewater industries. Both bio-flocculants were very effective for removal of heavy metals at a dosage not exceeding 0.1 mg/ml. However, the removal efficiency of heavy metals was dependant on initial concentration and type of bio-flocculants. 84.0% of Cu2+ and 99.5% of Pb2+ were removed from industrial wastewater using Bacillus sp. Bio-flocculant resulting residual values of 28.5 and 1.13μg/l respectively in the treated effluent. Lower removal efficiencies of 70.4% for Cu2+ and 97.8% for Pb2+ occurred using Pseudomonas sp. bioflocculant. Nevertheless, Pseudomonas sp. bio-flocculant achieved a substantially higher removal efficiency of Cd2+ (93.5%) as compared to 72.9% using Bacillus sp. Based on these results bio-flocculants are considered as a viable alternative for the treatment of industrial wastewater containing heavy metals.

scholarly journals Review of Different Materials that can be CAD/CAM Processed Description, chemical composition, indications in dentistry areas

2019 ◽  
Vol 70 (11) ◽  
pp. 4029-4034
Keyword(s):  
Glass Ceramics ◽  
Chemical Properties ◽  
Restorative Dentistry ◽  
Materials Properties ◽  
Physical Chemical ◽  
Cad Cam ◽  
Technology Cad ◽  
Materials Used ◽  
Cam Systems ◽  
The Ideal

The objective of this paper is to inform on the indications, appearance and advantages offered by each category of materials used in CAD / CAM technique for different prosthetic restorations.Modern techniques in restorative dentistry include CAD/CAM systems and materials that can be CAD/CAM processed. It is very important to know the physical-chemical properties and the indications of these materials to translate the patient’s wishes to reality providing the ideal restoration. There are a variety of CAD/CAM materials to choose from, all designed to provide efficient restoration design and production. We can choose from available materiales including glass ceramics, nano ceramics, zirconia, hybrid ceramics, BioHPP, in blocks or disks form. Keywords: CAD/CAM technology, CAD/CAM materials, properties, indications

scholarly journals Les caractéristiques architecturales et constructives de la muraille médievale à la période Hammadite à Bejaia (Algérie)

X ◽  
2020 ◽  
Author(s):  
Naima Abderrahim Mahindad
Keyword(s):  
Sixteenth Century ◽  
Eleventh Century ◽  
Construction Materials ◽  
City Wall ◽  
Physical Chemical ◽  
Comprehensive Knowledge ◽  
Petrographic Analyses ◽  
Materials Used ◽  
The City

The architectural and constructive characteristics of the medieval wall of Bejaia city during the Hammadite periodBejaia, is a coastal city of Central-East Algerian which has seen succeeding on its lands several civilizations: Byzantine, Roman, Hammadite, Spanish and Ottoman It reached its peak from the beginning of the eleventh century, when the Hammadite ruler, An-Nasir made it the capital. The city maintained this important status until the sixteenth century, when it was considered the jewel of the Maghreb. At that time, the city was fortified with a large surrounding wall, which spanned more than 5000 m. This city wall was flanked with bastions and towers, and rose in tiers from the sea-side to Mount Gouraya. Its layout was perfectly designed and blended with the city’s topography It consisted of three walls: one to the east and another to the west, which were connected by a third wall, which ran along the seaside. Today, two gates are preserved from the city of Bejaia’s rich defensive heritage: Bab El Bahr, which opens onto the sea, and Bab El Fouka, which opens onto the plains, as well as some parts of the walls, dotted around different parts of the city. This heritage is threatened and its preservation, restoration and enhancement require a comprehensive knowledge of the architectural and constructive styles, which characterize it, and of the materials used in its construction. This contribution aims to identify the architectural and constructive features of this defense system, developed by the Hammadites, as well as a characterization of the construction materials used, such mortar, through physical, chemical and petrographic analyses.

scholarly journals Review of Different Materials that can be CAD/CAM Processed Description, chemical composition, indications in dentistry areas

2019 ◽  
Vol 70 (11) ◽  
pp. 4029-4034
Author(s):  
Daniela Popa ◽  
Mariana Constantiniuc ◽  
Kamel Earar ◽  
Veronica Mercut ◽  
Monica Scrieciu ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Glass Ceramics ◽  
Chemical Properties ◽  
Restorative Dentistry ◽  
Physical Chemical ◽  
Cad Cam ◽  
Materials Used ◽  
Cam Systems ◽  
The Ideal ◽  
Design And Production

The objective of this paper is to inform on the indications, appearance and advantages offered by each category of materials used in CAD / CAM technique for different prosthetic restorations.Modern techniques in restorative dentistry include CAD/CAM systems and materials that can be CAD/CAM processed. It is very important to know the physical-chemical properties and the indications of these materials to translate the patient�s wishes to reality providing the ideal restoration. There are a variety of CAD/CAM materials to choose from, all designed to provide efficient restoration design and production. We can choose from available materiales including glass ceramics, nano ceramics, zirconia, hybrid ceramics, BioHPP, in blocks or disks form.

scholarly journals Portrayal of Textile Based Pollutants and its Impact on Soil, Plants and Fisheries

2021 ◽  
Vol 20 (3) ◽  
Author(s):  
M. Riza ◽  
M. N. Ehsan ◽  
S. Hoque
Keyword(s):  
Textile Industry ◽  
Global Economy ◽  
Negative Impact ◽  
Aquatic Organisms ◽  
Textile Wastewater ◽  
Biochemical Properties ◽  
Textile Processing ◽  
Textile Effluents ◽  
Positive Effects ◽  
The Impact

The textile industry occupies a significant hold on the global economy. This substantial industry often generates a large volume of effluents exceeding the permissible limit of discharge in the different regions of the world. Therefore, textile effluents act as pollutants altering the natural composition of various components of the environment. This paper discusses the impact of textile-based pollutants on agriculture including plants, soil, water and fisheries. The observed result is significant because textile effluents exert a widespread negative impact on the respective respondents, though plants show few positive effects. Prior treatment of textile wastewater is necessary before applying it to the soil, as there is a possibility of affecting the plant ecosystem via soil media. Plants are benefitted in terms of germination and growth, due to irrigation by textile effluents with proper dilution. The physical and biochemical properties of water streams along with aquatic organisms are impacted by these specific discharges, leading to even severe deterioration of particular living creatures. Pollutants released from various steps of textile processing have adverse effects on the environment, disturbing the food chain, ecosystem, and overall ecological balance.

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