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Processes
Special Issues
Pollution Control and Recycling of Solid Wastes
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Pollution Control and Recycling of Solid Wastes

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 3094

Special Issue Editors

Dr. Lin He

E-Mail Website
Guest Editor
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
Interests: oil-water separation; oil-solid separation; adsorption-desorption of gas; organic wastes treatment; VOCs; soil remediation
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yulong Wu

E-Mail Website
Guest Editor
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Interests: conversion of biomass energy; heterogeneous catalysis; resource chemical engineering; utilization of solid waste
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Shaohai Fu

E-Mail Website1 Website2
Guest Editor
College of Textile Science and Engineering, Jiangnan University, Wuxi 214122, China
Interests: eco-textile dyeing technologies; solid waste disposal; resource utilization technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Solid wastes have been largely produced in industry and people’s daily life, including industrial organic solid wastes (i.e., distillation residues, oil sludges, plastics, etc.), industrial inorganic solid wastes (i.e., waste salts, construction waste solids, industrial sludges, waste metals, etc.), municipal solid waste, etc. These solid wastes not only lead to serious environmental pollution, but also cause the exhaustion of production materials. Intrinsically, these solid wastes are resources which could be recovered or recycled as new products. Knowing how to control and reduce the production of solid wastes has become one of the important social problems and urgent challenge for both industry and society. Many different methods have been proposed and developed to control and recycle these solid wastes, such as source emission reduction and end treatment. These advancements in pollutant treatment can help to develop recovery and harmless treatment technologies, as well as potential applications.

This Special Issue on “Pollution Control and Recycling of Solid Wastes” seeks high-quality studies which focus on the latest novel advances in recovery and harmless treatment technologies for solid waste, as well as control processes or routes for pollutants. Topics include, but are not limited to, the following:

  • Industrial solid waste analysis and treatments;
  • Functional materials and performance application for solid waste treatments;
  • Pollutant control methods and cases studies;
  • The treatment and application of municipal solid waste;
  • Solid waste recovery and harmless conversion;
  • Recovery process industrial integration, application, and modelling;
  • Process reengineering;
  • Novel processes for producing traditional materials;
  • Process digitization.

Dr. Lin He
Prof. Dr. Yulong Wu
Prof. Dr. Shaohai Fu
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. Processes is an international peer-reviewed open access monthly 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 2400 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

  • pollution control
  • organic and inorganic solid wastes
  • recycling of solid wastes
  • industrial waste salts
  • municipal solid waste
  • harmless treatment
  • process evaluation
  • source emission reduction
  • process reengineering
  • digital management

Benefits of Publishing in a Special Issue

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  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

17 pages, 4189 KiB  
Article
Modelling and Validating the Nonthermal Plasma Parameters for Producing Liquid Hydrocarbon from Solid Polyolefin Wastes
by Mohammad Jakir Hossain Khan, Zilvinas Kryzevicius, Audrius Senulis, Audrone Zukauskaite and Jochen Uebe
Processes 2024, 12(10), 2067; https://doi.org/10.3390/pr12102067 - 24 Sep 2024
Cited by 1 | Viewed by 998
Abstract
This study solved a set of equations to verify the dynamic optimal conditions of nonthermal plasma (NTP)-chemical conversion of solid polyolefin wastes into liquid petroleum hydrocarbons. Furthermore, a novel optimisation model was validated with non-linear experimental conditions to assess the quantitative relationship between [...] Read more.
This study solved a set of equations to verify the dynamic optimal conditions of nonthermal plasma (NTP)-chemical conversion of solid polyolefin wastes into liquid petroleum hydrocarbons. Furthermore, a novel optimisation model was validated with non-linear experimental conditions to assess the quantitative relationship between the process variables responsible for the degradation rate of wastes. The central composite design (CCD) experimental design was developed based on the Response Surface Model (RSM) technique. These techniques significantly improved the model predictions because of the more-detailed electrochemical description. Experiments were conducted in an in-house-designed and -developed NTP system with advanced data acquisition schemes. Both experimental and the numerical findings exhibited a good agreement, and the results indicated that the electrical factors of NTP could significantly affect the conversion yield (Yconv%) of solid polyolefin-derived wastes to liquid hydrocarbons. Additionally, the model investigation indicated that factors such as power discharge (x1), voltage intensity (x2), and reaction retention time (RTT) (x3) significantly influenced the conversion yield. After optimisation, a maximum conversion percentage (Yconv%) of ≈93% was achieved. The findings indicated that this recommended framework could be effectively employed for scaling the plasma synergistic pyrolysis technique for generating the maximal Yconv% of plastic wastes to yield an oil. Thereafter, the analysis of variance (ANOVA) technique was applied to examine the accuracy of the developed structure in order to upgrade this laboratory-scale processes to an industrial-scale process with >95% effectiveness. The calorific value of the produced oil was seen to be from 43,570.5 J/g to 46,025.5 J/g due to changes of the arrangements of the process factors, which specified that the liquid hydrocarbons showed similar characteristics like commercial diesel in this respect. Full article
(This article belongs to the Special Issue Pollution Control and Recycling of Solid Wastes)
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11 pages, 2337 KiB  
Article
Wet Oxidation of Pharmaceutical Sludge for the Treatment and Production of Value-Added Materials
by Kaiyu Fang, Xu Zeng, Guodong Yao, Siqing Xia, Jianfu Zhao, Yangyuan Zhou, Yuting Zhu, Xuejun Li and Chanjuan Qu
Processes 2023, 11(9), 2747; https://doi.org/10.3390/pr11092747 - 14 Sep 2023
Cited by 3 | Viewed by 1548
Abstract
The wet oxidation of pharmaceutical sludge for the treatment and production of value-added materials was investigated. The experiments were carried out in a stainless-steel autoclave reactor with chemical synthetic pharmaceutical sludge. The highest removal rate of total suspended solids (90.1%) and volatile suspended [...] Read more.
The wet oxidation of pharmaceutical sludge for the treatment and production of value-added materials was investigated. The experiments were carried out in a stainless-steel autoclave reactor with chemical synthetic pharmaceutical sludge. The highest removal rate of total suspended solids (90.1%) and volatile suspended solids (98.4%) was achieved at 260 °C for 60 min with an initial oxygen pressure of 0.8 MPa. Simultaneously, the total chemical oxygen demand removal rate (78.7%) and the soluble chemical oxygen demand removal rate (81.6%) were obtained. The volatile fatty acid concentration—including acetic acid, propanoic acid, isobutyric acid and isovaleric acid—increased to 4819 mg/L with pH 12.56, which indicated the possibility of improving the quality of wet oxidized sludge solution as a potential carbon source by adding reagents. Scanning electron microscopy images showed that the sludge became a loose porous structure after wet oxidation, which is beneficial for dewatering performance. Energy dispersive spectroscopy images illustrate that carbon elements in sludge migrate from solid to liquid phases during the wet oxidation process. These results provide meaningful data for the design of further works and demonstrate that wet oxidation is a promising method for the treatment of pharmaceutical sludge, and the produced volatile fatty acids, including acetic acid and propanoic acid, are potential carbon sources for the biological treatment of wastewater. Full article
(This article belongs to the Special Issue Pollution Control and Recycling of Solid Wastes)
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