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Water
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Wastewater Treatment and Resource Recovery under the Circumstance of Carbon...
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Wastewater Treatment and Resource Recovery under the Circumstance of Carbon Neutrality

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 3954

Special Issue Editors

Prof. Dr. Shihai Deng

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Guest Editor
Department of Earth and Environmental Sciences, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 712000, China
Interests: water and wastewater treatment; AOPs; biological processes; membrane processes; resource recovery for circular economy and carbon neutrality; metallic catalysts and materials; micro-electrolysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yaqian Zhao

E-Mail Website
Guest Editor
1. UCD School of Civil Engineering, University College Dublin, Belfield, Dublin, Ireland
2. Institute of Water Resources & Hydro-electric Engineering, Xi'an University of Technology, Xi’an 710048, China
Interests: unconventional water and wastewater treatment technology; new constructed wetland technology; microbial fuel cell; ecological engineering; ecological restoration of surface water (rivers, lakes, bays, etc.); waterworks sludge regulation; dehydration and beneficial reuse
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Carbon neutrality is presently a hot topic for wastewater treatment plants around the world. Under this circumstance, the goal of wastewater treatment systems has extended from purifying the received water and protecting human health to improving sustainability. This includes the innovations in technologies and strategies for reducing consumption and improving resource recovery in wastewater treatment. Concerning the reduction in resource consumption, it includes the improvement of treatment capabilities with more effective use of energy and/or chemicals. Regarding resource recovery, it involves the reuse of treated effluents, energy recovery through the generation of electricity, H2 or CH4 from organic contaminants, nutrient recovery (e.g., nitrogen and phosphorus) through the production of fertilizers and/or biosolids, energy harvesting through combined heat and power systems, etc. 

This Special Issue titled “Wastewater Treatment and Resource Recovery under the Circumstance of Carbon Neutrality” of the journal Water welcomes original research articles, reviews and perspectives on the innovations in technologies and strategies for reducing consumption and improving resource recovery in wastewater treatment towards carbon neutrality. 

Prof. Dr. Shihai Deng
Prof. Dr. Yaqian Zhao
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. Water 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 2600 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

  • wastewater treatment
  • carbon emission reduction
  • nutrient recovery
  • energy generation
  • water reuse
  • energy consumption reduction
  • chemical dosage reduction
  • biological processes
  • ecological processes
  • advanced oxidation

Published Papers (2 papers)

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Research

13 pages, 3904 KiB  
Article
Physicochemical Properties and Phosphorus Adsorption Capacity of Ceramsite Made from Alum Sludge
by Li Shi, Xiaohong Zhao, Yongxiang Cao, Hongjuan Ma and Xuejun Sun
Water 2023, 15(13), 2427; https://0-doi-org.brum.beds.ac.uk/10.3390/w15132427 - 30 Jun 2023
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Abstract
Alum sludge is an inevitable by-product from the water purification process, which had been applied as substrates in some constructed wetlands with good performance, especially for phosphorus (P) adsorption. The raw alum sludge is similar to a clay lump with an irregular shape, [...] Read more.
Alum sludge is an inevitable by-product from the water purification process, which had been applied as substrates in some constructed wetlands with good performance, especially for phosphorus (P) adsorption. The raw alum sludge is similar to a clay lump with an irregular shape, and there is a concern of it leaching into water. For better reuse, herein, some sludge was fired to produce alum sludge ceramsite (ASC) with a uniform spherical shape via a four-step process of kneading the sludge ball, air drying, preheating at 400 °C for 10 min, and firing at 600 °C for 5 min. Meanwhile, an air-dried alum sludge ball (adASB) was manufactured for comparison. The physicochemical properties and P adsorption ability of ceramsite were investigated subsequently. Through XRD and FT-IR tests, there was no obvious difference between ASC and adASB on the phase structure, but there was a certain amount of Al-OH group loss on the surface of ASC. The structure of ASC was still amorphous, similar to adASB, while ASC possessed more micropore structure and a bigger specific surface area than adASB. Adsorption experiments showed the P adsorption behaviors of ASC and adASB were much similar, and their adsorption kinetics were in accordance with the two-step adsorption kinetics rate equation and pseudo-second-order kinetics equation. The maximum adsorption capacities of ASC and adASB fitted by the Langmuir model were 1.66 mg/g and 1.89 mg/g, respectively. It should be pointed out that, compared with other adsorbents, the ASC produced in this study still had a greater ability to adsorb P. Therefore, ASC should have a great application potential for P removal in wastewater treatment in China. Full article
(This article belongs to the Special Issue Wastewater Treatment and Resource Recovery under the Circumstance of Carbon Neutrality)
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23 pages, 8961 KiB  
Article
Using SWAT Model to Assess the Impacts of Land Use and Climate Changes on Flood in the Upper Weihe River, China
by Yinge Liu, Yuxia Xu, Yaqian Zhao and Yan Long
Water 2022, 14(13), 2098; https://0-doi-org.brum.beds.ac.uk/10.3390/w14132098 - 30 Jun 2022
Cited by 21 | Viewed by 3881
Abstract
Flood disasters have occurred frequently in recent years, but there is no consensus on the mechanism and influencing factors. Taking the upper reaches of Weihe River Basin as a case in Western China, a soil and water assessment tool (SWAT) model was established [...] Read more.
Flood disasters have occurred frequently in recent years, but there is no consensus on the mechanism and influencing factors. Taking the upper reaches of Weihe River Basin as a case in Western China, a soil and water assessment tool (SWAT) model was established to quantitatively simulate the impact of land use and climate change on runoff changes, while 4 extreme land-use scenarios and 24 temperature and precipitation scenarios assumptions were proposed to simulate the response of runoff to land use and climate changes. The SWAT simulation results showed that the sensitivity parameters affecting the model simulation were the CANMX, CN2, SOL_K, CH_N2, and SOL_AWC. The correlation index R2 and the efficiency coefficient ENS of the upper Weihe River were both in the range of 0.75–0.78, the relative error PS between the simulated results and the measured runoff was below 10%, suggesting the good applicability of the SWAT model in this study area. Using the improved SWAT model to simulate the peak runoff (flood) simulation value is generally smaller than the measured value, and the absolute value of the error is less than 6%. The expansion of wasteland increased the runoff by over 90% on average, the expansion of cultivated land increased the runoff by 8% on average, and the expansion of woodland and grassland increased the surface runoff by 6% on average. When the precipitation decreased by 25% and the temperature increased by 22%, the smallest runoff was obtained in the simulation. Accordingly, when the precipitation increased by 25% and the temperature decreased by 22%, the maximum annual runoff was obtained. By decomposing the contribution rate of human activities and climate change to runoff, it showed that the contribution rate of human activities to the reduction of runoff was greater than that of climate change. This study can provide scientific reference for the simulation and prediction of future floods. Full article
(This article belongs to the Special Issue Wastewater Treatment and Resource Recovery under the Circumstance of Carbon Neutrality)
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