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Agronomy
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Advances in Agricultural Wastewater Pretreatment Technologies: Challenges and Prospects
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Advances in Agricultural Wastewater Pretreatment Technologies: Challenges and Prospects

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Agricultural Biosystem and Biological Engineering".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 6265

Special Issue Editor

Dr. Yoong Kit Leong

E-Mail Website
Guest Editor
Department of Chemical and Materials Engineering, College of Engineering, Tunghai University, Taichung, Taiwan
Interests: circular economy; biofuel; algal biotechnology; waste valorization; life-cycle assessment; zero carbon emission technology; biorefinery
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The explosive human population growth and surge in demand for food have caused significant increases in the generation of agro-industrial wastewater. The scarcity of freshwater resources and pollution prevention issues have led to tremendous developments in both conventional and advanced wastewater treatment technologies. Embracing the concept of the “circular economy”, wastewater can be valorized to yield value-added products. This SI aims to provide a platform for researchers to disseminate some of the recent advances in the area of agricultural wastewater treatment. We are especially interested in the high-quality contributory research papers and state-of-the-art critical reviews in the following areas:

  • New developments in conventional treatment technologies (anaerobic digestion, constructed wetlands, etc.);
  • Emerging and advanced treatment technologies (pretreatment technologies, innovative adsorbent/biochar synthesis, bioreactor design, bioprocess engineering, and process modelling);
  • Sustainable wastewater valorization for the production of biochemicals, bioenergy and bioproducts;
  • Roles of microbes and enzymes in wastewater biorefinery;
  • Lifecycle and techno-economic analyses for wastewater treatment.

Dr. Yoong Kit Leong
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 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. Agronomy 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 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
  • circular economy
  • nutrient recycling
  • bioremediation
  • valorization
  • activated carbon
  • pollutant removal
  • adsorption
  • coagulation and flocculation
  • anaerobic digestion

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Published Papers (3 papers)

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Research

14 pages, 1383 KiB  
Article
Nutrient Content of Vineyard Leaves after Prolonged Treated Wastewater Irrigation
by Pilar Mañas Ramírez and Jorge De las Heras Ibáñez
Agronomy 2023, 13(3), 620; https://doi.org/10.3390/agronomy13030620 - 22 Feb 2023
Cited by 5 | Viewed by 1250
Abstract
Water is essential for agricultural productivity and is a vital component of food security. In areas with limited water supplies, new water resources must be identified. Given these challenges, we attempted to determine whether the use of treated wastewater for vineyard irrigation is [...] Read more.
Water is essential for agricultural productivity and is a vital component of food security. In areas with limited water supplies, new water resources must be identified. Given these challenges, we attempted to determine whether the use of treated wastewater for vineyard irrigation is compatible with sensible agricultural methods within the context of a circular economy, where resource sustainability is a key tenet of foodtech. The main purpose of this study was to determine whether using treated wastewater for vineyard irrigation influences foliar nutrient content identifying differences according to irrigation water. A field experiment was designed to compare vineyards that had been irrigated with treated wastewater for years to those that had been irrigated with conventional well water. For characterization, water and soil were analyzed. Furthermore, the macro and micronutrient contents of vine leaves, as well as chlorophyll (SPAD units) measured directly in the field, were tracked over several seasons to determine the relationship between them. We found no nutritional imbalances in the crop at the end of the study, although there were improvements in the concentrations of some nutrients (Mg, Mn and Zn). It was also noticed that plots irrigated with treated wastewater run the risk of increasing soil saline concentrations. Full article
(This article belongs to the Special Issue Advances in Agricultural Wastewater Pretreatment Technologies: Challenges and Prospects)
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14 pages, 3580 KiB  
Article
Removal of Two Triazole Fungicides from Agricultural Wastewater in Pilot-Scale Horizontal Subsurface Flow Constructed Wetlands
by Paraskevas Parlakidis, Ioanna Gounari, Aristidis Georgiou, George Adamidis, Zisis Vryzas and Georgios D. Gikas
Agronomy 2023, 13(1), 265; https://doi.org/10.3390/agronomy13010265 - 16 Jan 2023
Cited by 8 | Viewed by 2542
Abstract
Myclobutanil is a systemic fungicide belonging to the triazole group, which is frequently detected in environmental samples. Triticonazole, also a triazole fungicide, controls soil and seed-borne diseases and it is mainly used as a seed-coating pesticide. Both myclobutanil and triticonazole are considered as [...] Read more.
Myclobutanil is a systemic fungicide belonging to the triazole group, which is frequently detected in environmental samples. Triticonazole, also a triazole fungicide, controls soil and seed-borne diseases and it is mainly used as a seed-coating pesticide. Both myclobutanil and triticonazole are considered as persistent pollutants in the environment, raising concerns about their environmental fate and ecotoxicity potential. The purpose of the present study was to investigate the efficiency of four pilot-scale horizontal subsurface flow (HSF) constructed wetlands (CWs) to remediate myclobutanil and triticonazole from artificially polluted water. Daily loading of the four CWs took place from March 2022 to July 2022 with contaminated water fortified with myclobutanil and triticonazole. Three of the CWs, encoded WMG-R, WMG-C, and WMG-U, with medium gravel (MG) as porous media and the fourth, with code name WFG-R, fine gravel (FG). Common reed (R, Phragmites australis) was planted in the WMG-R and WFG-R units, and cattail (C, Typha latifolia) in the WMG-C unit. The WMG-U unit with no plant was used as a control unit. The results showed that the removal rate follows the pattern: WFG-R (88.4%) > WMG-R > (83.4%) > WMG-C (59.3%) > WMG-U (36.6%) and WFG-R (88.5%) > WMG-C (71.0%) > WMG-R > (70.9%) > WMG-U (49.2%) for myclobutanil and triticonazole, respectively. The most significant factors influencing the fungicides’ dissipation were the porous media content and the plant species. Full article
(This article belongs to the Special Issue Advances in Agricultural Wastewater Pretreatment Technologies: Challenges and Prospects)
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14 pages, 2437 KiB  
Article
Modeling the Ability of a Maize–Olive Agroforestry System in Nitrogen and Herbicide Pollution Reduction Using RZWQM2 and Comparison with Field Measurements
by George Pavlidis and Vassilios A. Tsihrintzis
Agronomy 2022, 12(10), 2579; https://doi.org/10.3390/agronomy12102579 - 20 Oct 2022
Viewed by 1782
Abstract
Agricultural pollution models are a valuable tool for researchers and managers to predict and assess the potential contamination from the use of fertilizers and pesticides in the field. RZWQM2 is a comprehensive software package developed by the US EPA to predict environmental pollution [...] Read more.
Agricultural pollution models are a valuable tool for researchers and managers to predict and assess the potential contamination from the use of fertilizers and pesticides in the field. RZWQM2 is a comprehensive software package developed by the US EPA to predict environmental pollution after agrochemical application. The aim of the present study was to predict, using RZWQM2, the nitrogen and pesticides contents in soil of a monocrop and a tree-crop agroforestry system, and evaluate the effect of trees in reducing pollutants. Soil, weather, and agrochemical parameters for each setup were used as inputs in the model. Soil samples were collected at various depths and distances from the olive trees and were analyzed in the laboratory for nitrogen and pesticide contents. From the analysis of the results, it can be concluded that the model could identify the positive impact of the tree-crop agroforestry system in pollution reduction. Comparing the estimates with the relevant field data, the model presented some overestimation of the pesticide levels, particularly for the high-adsorptive and persistent pendimethalin herbicide, and slightly underestimated the concentrations of nitrates in the soil profile, while ammonium concentrations were well described. Overall, the model can be considered a useful and powerful tool for assessing the positive impacts of agroforestry systems in reducing soil pollution. Full article
(This article belongs to the Special Issue Advances in Agricultural Wastewater Pretreatment Technologies: Challenges and Prospects)
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