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Waste
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New Trends in Liquid and Solid Effluent Treatment
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New Trends in Liquid and Solid Effluent Treatment

A special issue of Waste (ISSN 2813-0391).

Deadline for manuscript submissions: 30 April 2024 | Viewed by 11801

Special Issue Editors

Prof. Dr. Gassan Hodaifa

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Guest Editor
Molecular Biology and Biochemical Engineering Department, Chemical Engineering Area, Universidad Pablo de Olavide, ES-14013 Seville, Spain
Interests: advanced oxidation processes; kinetic growth; biomass growth, industrial and urban wastewater, contaminant removal; wastewater treatment; clean technologies; sustainability and regeneration of wastewater; circular economy
Special Issues, Collections and Topics in MDPI journals
Dr. Mha Albqmi

E-Mail Website
Guest Editor
Chemistry Department, College of Science and Art, Olive Research Center, Jouf University, Alqurayyat P.O.Box 756, Saudi Arabia
Interests: environmental chemistry; water purification; olive oil mill wastewater; photocatalytic degradation; heavy metal remediation; adsorption; chemical extraction
Special Issues, Collections and Topics in MDPI journals
Dr. Zacharias Frontistis

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of Western Macedonia, GR-50132 Kozani, Greece
Interests: advanced oxidation processes; electrochemistry; photocatalysis; persulfate; sonochemistry; wastewater treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

In the last twenty years, the effects of climate change have started to manifest themselves clearly due to the increase in emissions and concentrations of greenhouse gases into and in the atmosphere. In fact, in the last century, we were talking about waste, and now in the current century, we are clearly talking about the need and urgency to transform waste into by-products that can be transformed into new marketable or high-added-value products, particularly energy products that can respond to today's energy needs. This Special Issue aims to emphasize the critical role of solid or liquid waste in achieving a green circular economy that can meet the needs of today's society, starting from the technologies currently installed and how we can modify or improve them to respond to a more circular economy to include new trends in the treatment and use of waste. In this sense, we would like to invite the scientific community to participate in this Special Issue in order to visualise current capacities to tackle climate change and achieve a circular economy. This Special Issue will accept all contributions related to the treatment and utilization of waste, the generation of new products from waste, green chemistry, new operations and technologies for waste separation, processes and bioprocesses based on waste as a raw material, the manufacturing, valorization, and design of new materials from waste, life cycle analysis, etc.

Prof. Dr. Gassan Hodaifa
Dr. Mha Albqmi
Dr. Zacharias Frontistis
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Waste is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • domestic/urban wastewater
  • industrial wastewater
  • solid residue
  • waste separation technologies
  • waste transformation process
  • waste management
  • waste reduction
  • composting
  • chemical oxidation
  • biochemical reactions
  • microorganisms
  • valorization
  • reutilization
  • biofuels
  • energy generation
  • new products
  • waste legislation

Published Papers (2 papers)

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Research

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9 pages, 1172 KiB  
Article
Wine Lees as Alternative Substrate for Microalgae Cultivation: New Opportunity in Winery Waste Biorefinery Application
by Paolina Scarponi, Marco Bravi and Cristina Cavinato
Waste 2023, 1(3), 631-639; https://0-doi-org.brum.beds.ac.uk/10.3390/waste1030037 - 11 Jul 2023
Viewed by 1032
Abstract
The winery sector represents one of the most important agricultural industries in Mediterranean country. Wine production processes generate a large amount of wastes and wastewaters that must be treated before their release in the environment. Among these wastes, wine lees, defined as the [...] Read more.
The winery sector represents one of the most important agricultural industries in Mediterranean country. Wine production processes generate a large amount of wastes and wastewaters that must be treated before their release in the environment. Among these wastes, wine lees, defined as the viscous material that settles on the bottom of fermenters, represent about 13% of the total wine production. The wine lees do not have applications within a circular economy approach, due to their low value; ethanol and tartaric acid are the only compounds recovered, while the rest is usually not valorized. The aim of this study is to explore the possible cultivation of microalgae on a liquid fraction of wine lees in a batch test at different substrate/inoculum dilutions. The results highlighted that Chlorella vulgaris can grow on wine lees at 1:10 and 1:5 dilutions, but a spontaneous yeast-microalgae consortium is observed (biomass production of 2 g l−1). A high lipid and protein storage was detected in the yeast-microalgae consortium (34.56 ± 13.70% and 39.73 ± 4.49%, respectively), associated with a high sCOD and polyphenols removal (99.95 ± 0.01% and 92.31 ± 0.02%, respectively), encouraging biological wine lees treatment. Full article
(This article belongs to the Special Issue New Trends in Liquid and Solid Effluent Treatment)
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Review

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31 pages, 4945 KiB  
Review
Adsorption of Heavy Metals: Mechanisms, Kinetics, and Applications of Various Adsorbents in Wastewater Remediation—A Review
by Zarifeh Raji, Ahasanul Karim, Antoine Karam and Seddik Khalloufi
Waste 2023, 1(3), 775-805; https://0-doi-org.brum.beds.ac.uk/10.3390/waste1030046 - 06 Sep 2023
Cited by 21 | Viewed by 10248
Abstract
Heavy metal contamination in wastewater is a significant concern for human health and the environment, prompting increased efforts to develop efficient and sustainable removal methods. Despite significant efforts in the last few decades, further research initiatives remain vital to comprehensively address the long-term [...] Read more.
Heavy metal contamination in wastewater is a significant concern for human health and the environment, prompting increased efforts to develop efficient and sustainable removal methods. Despite significant efforts in the last few decades, further research initiatives remain vital to comprehensively address the long-term performance and practical scalability of various adsorption methods and adsorbents for heavy metal remediation. This article aims to provide an overview of the mechanisms, kinetics, and applications of diverse adsorbents in remediating heavy metal-contaminated effluents. Physical and chemical processes, including ion exchange, complexation, electrostatic attraction, and surface precipitation, play essential roles in heavy metal adsorption. The kinetics of adsorption, influenced by factors such as contact time, temperature, and concentration, directly impact the rate and effectiveness of metal removal. This review presents an exhaustive analysis of the various adsorbents, categorized as activated carbon, biological adsorbents, agricultural waste-based materials, and nanomaterials, which possess distinct advantages and disadvantages that are linked to their surface area, porosity, surface chemistry, and metal ion concentration. To overcome challenges posed by heavy metal contamination, additional research is necessary to optimize adsorbent performance, explore novel materials, and devise cost-effective and sustainable solutions. This comprehensive overview of adsorption mechanisms, kinetics, and diverse adsorbents lays the foundation for further research and innovation in designing optimized adsorption systems and discovering new materials for sustainable heavy metal remediation in wastewater. Full article
(This article belongs to the Special Issue New Trends in Liquid and Solid Effluent Treatment)
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