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Innovative Technologies in Water Treatment

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: closed (30 May 2026) | Viewed by 452

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Guest Editor
School of Sciences and Engineering, São Paulo State University (UNESP), Campus Tupã, São Paulo, SP, Brazil
Interests: wastewater treatment; advanced oxidative electrochemical; electrochemical processes; electroanalysis; water analysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The growing demand for effective and sustainable solutions for water and wastewater treatment represents one of the most significant current global challenges. Technological progress in this field is essential to ensure water security, protect aquatic ecosystems, and foster socio-economic development in harmony with environmental preservation.

This Special Issue aims to gather original contributions that highlight scientific and practical developments in this field, ranging from novel materials, processes, and monitoring methods to the application of digital tools, biotechnological approaches, and cost-effective solutions in water treatment.

We invite researchers, professionals, and graduate students to submit articles that expand the debate and offer innovative perspectives that address the challenges related to water quality and sustainable use. Experimental studies, comprehensive reviews, and case reports on pilot- or industrial-scale applications will be especially welcome.

We anticipate that this Special Issue will serve as a platform for scientific dialogue and the dissemination of innovative practices, contributing to the construction of a more sustainable future.

Prof. Dr. Juliane Cristina Forti
Guest Editor

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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly 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

  • water treatment
  • wastewater treatment
  • innovative technologies
  • water sustainability
  • advanced oxidation processes
  • bioremediation
  • environmental monitoring
  • water reuse
  • water resources management
  • environmental engineering

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Published Papers (1 paper)

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Research

23 pages, 1542 KB  
Article
Pilot-Scale Integration of Phosphorus Precipitation and Negative-Pressure Ammonia Stripping for Municipal Reject Water Treatment
by Przemysław Kowal, Sławomir Kasiński, Anna Remiszewska-Skwarek, Eliza Kulbat and Krzysztof Czerwionka
Appl. Sci. 2026, 16(16), 8265; https://doi.org/10.3390/app16168265 - 19 Aug 2026
Viewed by 196
Abstract
Recovering nitrogen from wastewater is vital for a circular economy, yet conventional air stripping is limited by aerodynamic backpressure and CO2-induced pH drops. This study evaluates a novel pilot-scale engineering approach for municipal reject water, integrating chemical phosphorus precipitation with a [...] Read more.
Recovering nitrogen from wastewater is vital for a circular economy, yet conventional air stripping is limited by aerodynamic backpressure and CO2-induced pH drops. This study evaluates a novel pilot-scale engineering approach for municipal reject water, integrating chemical phosphorus precipitation with a fundamentally redesigned ammonia stripping column. Upstream calcium hydroxide dosing achieved >99.9% phosphorus recovery and spontaneously alkalized the effluent (pH > 12.1), eliminating supplementary caustic addition. The downstream stripping column utilized negative-pressure (vacuum) operation and high-pressure liquid atomization to maximize mass transfer while preventing flooding and alkalinity neutralization. Comprehensive on-site testing established a clear mathematical relationship between aerodynamics and efficiency. Results demonstrate that high-efficiency recovery requires gas-to-liquid (G/L) ratios exceeding 70:1, a threshold uniquely unlocked by this negative-pressure design. Under optimal conditions, the continuous-flow system achieved 87.6% ammonia removal. A low-resistance acid scrubber captured ~100% of the volatilized ammonia (exhaust 0–1 ppm), producing a concentrated ammonium sulfate bio-fertilizer. This integrated technology provides a scalable, applied engineering blueprint for advancing sustainable Water Resource Recovery Facilities. Full article
(This article belongs to the Special Issue Innovative Technologies in Water Treatment)
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