scholarly journals Niobium Oxide Catalysts as Emerging Material for Textile Wastewater Reuse: Photocatalytic Decolorization of Azo Dyes

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1070 ◽  
Author(s):  
Alexsandro Jhones dos Santos ◽  
Luana Márcia Bezerra Batista ◽  
Carlos Alberto Martínez-Huitle ◽  
Ana Paula de Melo Alves ◽  
Sergi Garcia-Segura
Keyword(s):  
Water Reuse ◽  
Wastewater Reuse ◽  
Methyl Orange Solution ◽  
Textile Wastewater ◽  
Wastewater Remediation ◽  
Operational Conditions ◽  
Photocatalytic Decolorization ◽  
Potential Applicability ◽  
Activity Loss ◽  
Photocatalytic Material

Niobium-based metal oxides are emerging semiconductor materials with barely explored properties for photocatalytic wastewater remediation. Brazil possesses the greatest reserves of niobium worldwide, being a natural resource that is barely exploited. Environmental applications of solar active niobium photocatalysts can provide opportunities in the developing areas of Northeast Brazil, which receives over 22 MJ m2 of natural sunlight irradiation annually. The application of photocatalytic treatment could incentivize water reuse practices in small and mid-sized textile businesses in the region. This work reports the facile synthesis of Nb2O5 catalysts and explores their performance for the treatment of colored azo dye effluents. The high photoactivity of this alternative photocatalyst makes it possible to quickly obtain complete decolorization, in less than 40 min of treatment. The optimal operational conditions are defined as 1.0 g L−1 Nb2O5 loading in slurry, 0.2 M of H2O2, pH 5.0 to treat up to 15 mg L−1 of methyl orange solution. To evaluate reutilization without photocatalytic activity loss, the Nb2O5 was recovered after the experience and reused, showing the same decolorization rate after several cycles. Therefore, Nb2O5 appears to be a promising photocatalytic material with potential applicability in wastewater treatment due to its innocuous character and high stability.

scholarly journals Nano-based adsorbent and photocatalyst use for pharmaceutical contaminant removal during indirect potable water reuse

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Sofia K. Fanourakis ◽  
Janire Peña-Bahamonde ◽  
Pasan C. Bandara ◽  
Debora F. Rodrigues
Keyword(s):  
Water Treatment ◽  
Optical Fibers ◽  
Water Reuse ◽  
Emerging Contaminants ◽  
Potable Water ◽  
Material Research ◽  
Treatment Techniques ◽  
Pharmaceutical Removal ◽  
Potential Applicability ◽  
Photocatalytic Material

AbstractIncreasing human activity, including commercial and noncommercial use of pharmaceuticals, personal care products, and agricultural products, has introduced new contaminants that can be challenging to remove with currently available technologies. Pharmaceuticals, in particular, can be especially challenging to remove from the water supply and can pose great harm to people and local ecosystems. Their highly stable nature makes their degradation with conventional water treatment techniques difficult, and studies have shown that even advanced treatment of water is unable to remove some compounds. As such, decontamination of water from pharmaceuticals requires the development of advanced technologies capable of being used in indirect and direct potable water reuse. In this review, we discuss pharmaceutical removal in indirect potable water treatment and how recent advancements in adsorption and photocatalysis technologies can be used for the decontamination of pharmaceutical-based emerging contaminants. For instance, new materials that incorporate graphene-based nanomaterials have been developed and shown to have increased adsorptive capabilities toward pharmaceuticals when compared with unmodified graphene. In addition, adsorbents have been incorporated in membrane technologies, and photocatalysts have been combined with magnetic material and coated on optical fibers improving their usability in water treatment. Advancements in photocatalytic material research have enabled the development of highly effective materials capable of degradation of a variety of pharmaceutical compounds and the development of visible-light photocatalysts. To understand how adsorbents and photocatalysts can be utilized in water treatment, we address the benefits and limitations associated with these technologies and their potential applicability in indirect potable water reuse plants.

scholarly journals Recovery of Biologically Treated Textile Wastewater by Ozonation and Subsequent Bipolar Membrane Electrodialysis Process

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 900
Author(s):  
Burak Yuzer ◽  
Huseyin Selcuk
Keyword(s):  
Textile Industry ◽  
Wastewater Reuse ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Quality Parameters ◽  
Bipolar Membrane ◽  
Acid Base ◽  
Operational Conditions ◽  
Bipolar Membrane Electrodialysis ◽  
Pre Treatment

The Bipolar Membrane Electrodialysis process (BPMED) can produce valuable chemicals such as acid (HCl, H2SO4, etc.) and base (NaOH) from saline and brackish waters under the influence of an electrical field. In this study, BPMED was used to recover wastewater and salt in biologically treated textile wastewater (BTTWW). BPMED process, with and without pre-treatment (softening and ozonation), was evaluated under different operational conditions. Water quality parameters (color, remaining total organic carbon, hardness, etc.) in the acid, base and filtrated effluents of the BPMED process were evaluated for acid, base, and wastewater reuse purposes. Ozone oxidation decreased 90% of color and 37% of chemical oxygen demand (COD) in BTTWW. As a result, dye fouling on the anion exchange membrane of the BPMED process was reduced. Subsequently, over 90% desalination efficiency was achieved in a shorter period. Generated acid, base, and effluent wastewater of the BPMED process were found to be reusable in wet textile processes. Results indicated that pre-ozonation and subsequent BPMED membrane systems might be a promising solution in converging to a zero discharge approach in the textile industry.

Textile Wastewater Reuse: Ozonation of Membrane Concentrated Secondary Effluent

1999 ◽  
Vol 40 (4-5) ◽  
pp. 99-105 ◽  
Author(s):  
A. Lopez ◽  
G. Ricco ◽  
R. Ciannarella ◽  
A. Rozzi ◽  
A. C. Di Pinto ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Acute Toxicity ◽  
Wastewater Treatment Plant ◽  
Textile Industry ◽  
Nonionic Surfactants ◽  
Wastewater Reuse ◽  
Treatment Plant ◽  
Textile Wastewater ◽  
Secondary Effluent ◽  
Complete Disappearance

Among the activities appointed by the EC research-project “Integrated water recycling and emission abatement in the textile industry” (Contract: ENV4-CT95-0064), the effectiveness of ozone for improving the biotreatability of recalcitrant effluents as well as for removing from them toxic and/or inhibitory pollutants has been evaluated at lab-scale. Real membrane concentrates (pH=7.9; TOC=190 ppm; CDO=595 ppm; BOD5=0 ppm; Conductivity=5,000 μS/cm; Microtox-EC20=34%) produced at Bulgarograsso (Italy) Wastewater Treatment Plant by nanofiltering biologically treated secondary textile effluents, have been treated with ozonated air (O3conc.=12 ppm) over 120 min. The results have indicated that during ozonation, BOD5 increases from 0 to 75 ppm, whereas COD and TOC both decrease by about 50% and 30 % respectively. As for potentially toxic and/or inhibitory pollutants such as dyes, nonionic surfactants and halogenated organics, all measured as sum parameters, removals higher than 90% were achieved as confirmed by the complete disappearance of acute toxicity in the treated streams. The only ozonation byproducts searched for and found were aldehydes whose total amount continuously increased in the first hour from 1.2 up to 11.8 ppm. Among them, formaldehyde, acetaldehyde, glyoxal, propionaldehyde, and butyraldehyde were identified by HPLC.

Wastewater Reuse for River Recovery in Semi-Arid Israel

1999 ◽  
Vol 40 (4-5) ◽  
pp. 43-50 ◽  
Author(s):  
Marcelo Juanico ◽  
Eran Friedler
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Water Reuse ◽  
Water Quality Management ◽  
Wastewater Reuse ◽  
Water Source ◽  
Treated Wastewater ◽  
Reclaimed Wastewater ◽  
Pollution Impacts ◽  
Semi Arid

Most of the water has been captured in the rivers of Israel and they have turned into dry river-beds which deliver only sporadic winter floods. In a semi-arid country where literally every drop of water is used, reclaimed wastewater is the most feasible water source for river recovery. Two topics are addressed in this paper: water quality management in rivers where most of the flowing water is treated wastewater, and the allocations of reclaimed wastewater required for the recovery of rivers and streams. Water quality management must consider that the main source of water to the river has a pollution loading which reduces its capability to absorb other pollution impacts. The allocation of treated wastewater for the revival of rivers may not affect negatively the water balance of the region; it may eventually improve it. An upstream bruto allocation of 122 MCM/year of wastewater for the recovery of 14 rivers in Israel may favor downstream reuse of this wastewater, resulting in a small neto allocation and in an increase of the water resources available to the country. The discharge of effluents upstream to revive the river followed by their re-capture downstream for irrigation, implies a further stage in the intensification of water reuse.

scholarly journals Wastewater Treatment and Water Reuse in Spain. Current Situation and Perspectives

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1551 ◽  
Author(s):  
Antonio Jodar-Abellan ◽  
María Inmaculada López-Ortiz ◽  
Joaquín Melgarejo-Moreno
Keyword(s):  
Water Quality ◽  
European Union ◽  
Wastewater Treatment ◽  
Water Reuse ◽  
Wastewater Reuse ◽  
The European Union ◽  
Water Planning ◽  
Structural Problem ◽  
The World ◽  
Access To Water

The issues of wastewater treatment and the reuse of water are of great importance, especially in areas where the shortage of conventional resources is a structural problem, as it is in the case of Spain. Wastewater reuse is a valid mechanism to avoid problems derived from droughts and water scarcity. It allows access to water resources in areas with water restrictions and to prevent futures scenarios, due to it being expected that water consumption will double by 2050 over the world. Thus, the likelihood that this unconventional, strategic resource would become scarce is unquestionable, particularly in cases where water planning and exploitation systems prioritize the preservation, protection, and improvement of water quality, as well as the sustainable and efficient use of natural resources. This paper shows how wastewater treatment and reuse are linked, as the reuse of wastewater is associated with a previous regeneration, and both of them are essential tools for maximizing environmental outcomes, as called for in the European Union Directives.

Integration of Fenton's reaction based processes and cation exchange processes in textile wastewater treatment as a strategy for water reuse

2020 ◽  
Vol 272 ◽  
pp. 111082
Author(s):  
Laís G.M. Silva ◽  
Francisca C. Moreira ◽  
Maria Alice P. Cechinel ◽  
Luciana P. Mazur ◽  
Antônio A. Ulson de Souza ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Cation Exchange ◽  
Water Reuse ◽  
Textile Wastewater ◽  
Fenton’S Reaction ◽  
Exchange Processes ◽  
Textile Wastewater Treatment

Economic considerations and decision support tool for wastewater reuse scheme planning

2007 ◽  
Vol 56 (5) ◽  
pp. 175-182 ◽  
Author(s):  
R. Hochstrat ◽  
D. Joksimovic ◽  
T. Wintgens ◽  
T. Melin ◽  
D. Savic
Keyword(s):  
Water Reuse ◽  
Net Present Value ◽  
Wastewater Reuse ◽  
Reclaimed Water ◽  
Decision Support Tool ◽  
Critical Issue ◽  
Economic Feasibility ◽  
Support Tool ◽  
The Cost ◽  
Economic Considerations

The reuse of upgraded wastewater for beneficial uses is increasingly adopted and accepted as a tool in water management. However, funding of schemes is still a critical issue. The focus of this paper is on economic considerations of water reuse planning. A survey of pricing mechanisms for reclaimed water revealed that most schemes are subsidised to a great extent. In order to minimise these state contributions to the implementation and operation of reuse projects, their planning should identify a least cost design option. This also has to take into account the established pricing structure for conventional water resources and the possibility of gaining revenues from reclaimed water pricing. The paper presents a case study which takes into account these aspects. It evaluates different scheme designs with regard to their Net Present Value (NPV). It could be demonstrated that for the same charging level, quite different amounts of reclaimed water can be delivered while still producing an overall positive NPV. Moreover, the economic feasibility and competitiveness of a reuse scheme is highly determined by the cost structure of the conventional water market.

The role of membrane technology in sustainable decentralized wastewater systems

2005 ◽  
Vol 51 (10) ◽  
pp. 317-325 ◽  
Author(s):  
A.G. Fane ◽  
S.A. Fane
Keyword(s):  
Water Management ◽  
Wastewater Treatment ◽  
Water Reuse ◽  
Wastewater Reuse ◽  
Membrane Technology ◽  
Urban Water ◽  
Urban Water Management ◽  
Decentralized Wastewater Treatment ◽  
Sustainable Urban Water Management

Decentralized wastewater treatment has the potential to provide sanitation that meets criteria for sustainable urban water management in a manner that is less resource intensive and more cost effective than centralized approaches. It can facilitate water reuse and nutrient recovery and can potentially reduce the ecological risks of wastewater system failure and the community health risk in a wastewater reuse scheme. This paper examines the potential role of membrane technology in sustainable decentralized sanitation. It is argued that the combination of membrane technology within decentralized systems can satisfy many of the criteria for sustainable urban water management. In particular, the role of membranes as a dependable barrier in the wastewater treatment process can increase system reliability as well as lowering the latent risks due to wastewater reuse. The modular nature of membranes will allow plant size to range from single dwellings, through clusters to suburb size. It is concluded that realization of the potential for membrane-based technologies in decentralized wastewater treatment will require some progress both technically and institutionally. The areas where advances are necessary are outlined.

Textile wastewater treatment and reuse by solar catalysis: results from a pilot plant in Tunisia

2004 ◽  
Vol 49 (4) ◽  
pp. 331-337 ◽  
Author(s):  
L. Bousselmi ◽  
S.-U. Geissen ◽  
H. Schroeder
Keyword(s):  
Wastewater Treatment ◽  
Pilot Plant ◽  
Degradation Kinetics ◽  
Wastewater Reuse ◽  
Textile Wastewater ◽  
Dichloroacetic Acid ◽  
Bench Scale ◽  
Economic Application ◽  
Textile Wastewater Treatment ◽  
Textile Factory

Based on results from bench-scale flow-film-reactors (FFR) and aerated cascade photoreactors, a solar catalytic pilot plant has been built at the site of a textile factory. This plant has an illuminated surface area of 50 m2 and is designed for the treatment of 1 m3 h-1 of wastewater. The preliminary results are presented and compared with a bench-scale FFR using textile wastewater and dichloroacetic acid. Equivalent degradation kinetics were obtained and it was demonstrated that the solar catalytic technology is able to remove recalcitrant compounds and color. However, on-site optimization is still necessary for wastewater reuse and for an economic application.

scholarly journals Membrane-Based Processes Used in Municipal Wastewater Treatment for Water Reuse: State-Of-The-Art and Performance Analysis

Membranes ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 131 ◽  
Author(s):  
Jiaqi Yang ◽  
Mathias Monnot ◽  
Lionel Ercolei ◽  
Philippe Moulin
Keyword(s):  
Water Reuse ◽  
Public Perception ◽  
Municipal Wastewater ◽  
Wastewater Reuse ◽  
Pilot Scale ◽  
Economic Feasibility ◽  
Municipal Wastewater Treatment ◽  
Removal Capacity ◽  
Treatment Processes ◽  
Alternative Water

Wastewater reuse as a sustainable, reliable and energy recovery concept is a promising approach to alleviate worldwide water scarcity. However, the water reuse market needs to be developed with long-term efforts because only less than 4% of the total wastewater worldwide has been treated for water reuse at present. In addition, the reclaimed water should fulfill the criteria of health safety, appearance, environmental acceptance and economic feasibility based on their local water reuse guidelines. Moreover, municipal wastewater as an alternative water resource for non-potable or potable reuse, has been widely treated by various membrane-based treatment processes for reuse applications. By collecting lab-scale and pilot-scale reuse cases as much as possible, this review aims to provide a comprehensive summary of the membrane-based treatment processes, mainly focused on the hydraulic filtration performance, contaminants removal capacity, reuse purpose, fouling resistance potential, resource recovery and energy consumption. The advances and limitations of different membrane-based processes alone or coupled with other possible processes such as disinfection processes and advanced oxidation processes, are also highlighted. Challenges still facing membrane-based technologies for water reuse applications, including institutional barriers, financial allocation and public perception, are stated as areas in need of further research and development.

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