Sustainable Technologies for Wastewater Treatment and Resource Recovery

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Toxicity Reduction and Environmental Remediation".

Deadline for manuscript submissions: 20 July 2025 | Viewed by 935

Special Issue Editors


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Guest Editor
Centre for Water Research, Advanced Institute of National Sciences, Beijing Normal University, Zhuhai, China
Interests: resource recovery; biofouling; biofilm; membrane technology; machine learning

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Guest Editor
School of Environmental and municipal engineering, Qingdao University of Technology, Qingdao 400233, China
Interests: persistent organic pollutants; biotoxicity; wastewater treatment; carbon neutral
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Guest Editor
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
Interests: wastewater treatment; membrane technology; MABR
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the face of emerging contaminants, sustainable wastewater treatment and resource recovery have become vital components in building environmental resilience and moving towards a circular economy. By transforming wastewater into a valuable resource stream and capturing bioenergy, nutrients, minerals, and metals, these technologies remove contaminants, reduce waste, conserve finite materials, and lessen ecological impacts. Among them, membrane-based processes are especially important, enabling contaminant removal, precise separation, concentration, and the subsequent reuse of valuable components. Implementing sustainable wastewater management strategies not only optimizes resource utilization but also safeguards long-term environmental health and economic prosperity.

This Special Issue, "Sustainable Technologies for Wastewater Treatment and Resource Recovery", focuses on addressing the challenges posed by emerging contaminants and highlights innovative research, methodologies, and solutions. We welcome high-quality original research articles, short communications, and reviews on topics including, but not limited to, the following:

  • Bioenergy production from wastewater;
  • Nutrient and metal recovery from wastewater;
  • Membrane technologies for resource separation and contaminant removal;
  • Advanced processes for resource extraction and contaminant mitigation;
  • Nutrient recovery from wasted activated sludge;
  • Sustainable application for wasted activated sludge.

Your contributions will help enrich our understanding, drive sustainable initiatives, and shape the future of wastewater treatment and resource recovery. We look forward to your submissions.

Dr. Boyan Xu
Prof. Dr. Xueqing Shi
Dr. Han Zhang
Guest Editors

Manuscript Submission Information

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Keywords

  • bioenergy
  • nutrient recovery
  • membrane technology
  • resource extraction
  • circular economy
  • contaminant removal
  • wasted activated sludge conversion

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Published Papers (1 paper)

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Research

14 pages, 2506 KiB  
Article
Bio-Refinery of Organics into Value-Added Biopolymers: Exploring the Effects of Hydraulic Retention Time and Organic Loading Rate on Biopolymer Harvesting from a Biofilm-Based Process
by Qingna Shang, Lin Li, Yi Zhang, Xueqing Shi, Harsha Ratnaweera, Dong-Hoon Kim and Haifeng Zhang
Toxics 2025, 13(3), 183; https://doi.org/10.3390/toxics13030183 - 28 Feb 2025
Viewed by 749
Abstract
This study aimed to examine the impacts of hydraulic retention time (HRT) and organic loading rate (OLR) on the alginate-like exopolymers’ (ALEs) recovery potential from a biofilm-based process. A lab-scale moving bed biofilm reactor (MBBR) was operated under different HRT (12.0, 6.0, and [...] Read more.
This study aimed to examine the impacts of hydraulic retention time (HRT) and organic loading rate (OLR) on the alginate-like exopolymers’ (ALEs) recovery potential from a biofilm-based process. A lab-scale moving bed biofilm reactor (MBBR) was operated under different HRT (12.0, 6.0, and 2.0 h) and OLR (1.0, 2.0, and 6.0 kg COD/m3/d) conditions. The results demonstrated that the reduction in HRT and increase in OLR had remarkable effects on enhancing ALE production and improving its properties, which resulted in the ALE yield increasing from 177.8 to 221.5 mg/g VSS, with the protein content rising from 399.3 to 494.3 mg/g ALE and the enhanced alginate purity by 39.8%, corresponding to the TOC concentration increasing from 108.3 to 157.0 mg/g ALE. Meanwhile, to illustrate different ALE recovery potentials, microbial community compositions of the MBBR at various operational conditions were also assessed. The results showed that a higher relative abundance of EPS producers (29.86%) was observed in the MBBR with an HRT of 2.0 h than that of 12.0 h and 6.0 h, revealing its higher ALE recovery potential. This study yields crucial results in terms of resource recovery for wastewater reclamation by providing an effective approach to directionally cultivating ALEs. Full article
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