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Processes
Special Issues
Recent Advances in Organic Waste and Wastewater Treatment Processes
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Recent Advances in Organic Waste and Wastewater Treatment Processes

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

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 1590

Special Issue Editors

Dr. Kaushik Venkiteshwaran

E-Mail Website
Guest Editor
Department of Civil, Coastal, and Environmental Engineering, University of South Alabama, Mobile, AL, USA
Interests: water and wastewater treatment; contaminant removal; bio-energy production
Dr. Abid Hussain

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, Carleton University, Ottawa, ON, Canada
Interests: bioenergy and recovery of value-added products; agri-waste; wastewater
Dr. Mohsen Karrabi

E-Mail Website
Guest Editor
Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
Interests: waste management and research; renewable and sustainable energy
Dr. Saba Seyedi

E-Mail Website
Guest Editor
Department of Civil, Environmental, and Architectural Engineering, University of Colorado, Boulder, CO, USA
Interests: anaerobic digestion; water treatment
Dr. Tonghui Xie

E-Mail Website
Guest Editor
Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering,Sichuan University, Chengdu, China
Interests: waste recycling

Special Issue Information

Dear Colleagues,

The ever-increasing anthropogenic impacts of excessive resource consumption and its subsequent waste and pollution generation call for extensive research and innovation in waste and wastewater treatment strategies. Organic solid waste such as food waste, agricultural residues, and wastewater biosolids make up a large portion of landfill waste in most nations, and the waste generated is only increasing with population growth. Existing wastewater treatment technologies are struggling to cope with increasing volumes in wastewater generation and stringent regulations around the removal of emerging contaminants, excess nutrients, heavy metals, and pathogens. In addition to treatment, emphasis is also placed on improving sustainability by viewing waste and wastewaters as valuable resources of biofuels, fertilizers, and raw materials for industrial applications. Thus, overcoming such an immense challenge requires a collective effort from researchers from across the globe who are investigating advanced chemical and biological treatment processes which can both meet treatment requirements and promote environmental sustainability through resource recovery. The objective of this Special Issue is to highlight the work carried out by researchers on emerging technologies and processes that promote advanced organic solid waste and wastewater treatment and resource recovery. Topics include but are not limited to:

  • Organic waste treatment, including food waste, agricultural residues, bioplastics, wastewater biosolids, and more;
  • Wastewater treatment with emphasis on BOD, emerging contaminants, pharmaceuticals, heavy metals, and pathogen removal;
  • Energy recovery via liquid biofuel or biogas production;
  • Production of byproducts such as bioplastics, fatty acids. and more;
  • Nutrient removal and recovery through physical, chemical, and biological processes;
  • Environmental biotechnology;
  • Novel adsorbents for contaminant removal.

Dr. Kaushik Venkiteshwaran
Dr. Abid Hussain
Dr. Mohsen Karrabi
Dr. Saba Seyedi
Dr. Tonghui Xie
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

  • biodegradation and bioremediation biosolids food waste
  • wastewater treatment
  • biological treatment
  • chemical treatment
  • nutrient recovery
  • energy recovery
  • biofuels
  • emerging contaminants

Published Papers (1 paper)

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Research

13 pages, 3383 KiB  
Article
Low-Temperature Vacuum Evaporation of Ammonia from Pig Slurry at Laboratory and Pilot-Plant Scale
by Míriam Cerrillo, Miguel Moreno, Laura Burgos, Roberto Estéfano, David Coll, Javier Soraluce, Naeria Navarro, Pedro Antonio Arnau and August Bonmatí
Processes 2023, 11(10), 2910; https://doi.org/10.3390/pr11102910 - 03 Oct 2023
Cited by 1 | Viewed by 1069
Abstract
Livestock manure has a high ammonium content that can limit its direct application on soil as a fertiliser in nitrate-vulnerable zones. Treatment technologies that are able to extract ammonium from livestock manure allow it to be concentrated in small volumes, making it cheaper [...] Read more.
Livestock manure has a high ammonium content that can limit its direct application on soil as a fertiliser in nitrate-vulnerable zones. Treatment technologies that are able to extract ammonium from livestock manure allow it to be concentrated in small volumes, making it cheaper and easier to transport and use as fertiliser in crop areas where there is a deficit of nitrogen. This study proposed using low-temperature vacuum evaporation to treat pig slurry in order to obtain marketable products that can be used as fertilisers and help close the nitrogen cycle. Two different configurations and scales were used. The first was a seven-litre laboratory-scale evaporator complemented with a condenser, a condensate trapper, an acid trap and a vacuum pump operated at −90 kPa vacuum pressure and at three different temperatures: 50.1 ± 0.2 °C, 46.0 ± 0.1 °C and 45.3 ± 1.3 °C. The second, Ammoneva, is an on-farm pilot-scale evaporator (6.4 m3), capable of working in four-hour batches of 1 t of liquid fraction of pig slurry with an operating temperature of 40–45 °C and −80 kPa vacuum pressure. The laboratory-scale evaporator, which features several novel improvements focused on increasing ammonia recovery, showed a higher nitrogen removal efficiency from the liquid fraction of pig slurry than the on-farm pilot plant, achieving 84% at 50.1 °C operation, and recovering most of it in ammonia solution (up to 77% of the initial nitrogen), with 7% of the ammonia not recovered. The Ammoneva pilot plant achieved a treated liquid fraction with 41% of initial nitrogen on average, recovering 15% in the ammonia solution in the acid trap; so, the NH3 gas absorption step needs to be further optimised. However, due to the simplicity of the Ammoneva pilot plant, which is easily placed inside a 20-foot container, and the complete automation of the process, it is suitable as an on-farm treatment for decentralised pig slurry management. The implementation of the novel design developed at laboratory-scale could help further increase recovery efficiencies at the pilot-plant scale. Full article
(This article belongs to the Special Issue Recent Advances in Organic Waste and Wastewater Treatment Processes)
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