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Biochemical wastewater from landfill leachate pretreated by microalgae achieving algae's self-reliant cultivation in full wastewater-recycling chain with desirable lipid productivity.

Bioresour Technol 2021 Jul 22;340:125640. Epub 2021 Jul 22.

School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China. Electronic address:

Heightened awareness of additional pretreatment for wastewater, has driven studies towards building a full wastewater-recycling chain wherein the wastewater pretreatment is performed by microalgae themselves. We applied biochemical wastewater from landfill leachate with added KHPO (BWLL + P) directly to microalgal cultivation. The results showed that the pretreatment provided by the 1st cultivation reduced suspended solids by nearly half, greatly boosting microalgal growth, which thus yielded 1. Read More

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Effect of cathodic culture on wastewater treatment and power generation in a photosynthetic sediment microbial fuel cell (SMFC): Canna indica v/s Chlorella vulgaris.

Bioresour Technol 2021 Jul 23;340:125645. Epub 2021 Jul 23.

Environmental Biotechnology Laboratory, Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur (IIT J), Jodhpur, 342037, Rajasthan, India. Electronic address:

The aim of this work was to compare the performance of the two types of photosynthetic microbial fuel cells (MFCs) fed with real wastewater- one having plant Canna indica (PMFC) and the other having alga Chlorella vulgaris (AMFC) at the cathode. The chemical oxygen demand (COD), phosphate, and nitrate removal stood at 57.16% 88. Read More

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Low-cost biochar adsorbents prepared from date and delonix regia seeds for heavy metal sorption.

Bioresour Technol 2021 Jul 19;339:125606. Epub 2021 Jul 19.

Biorefining and Advanced Materials Research Center, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK; Center for Safe and Improved Food, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK. Electronic address:

In this study, low-cost biochar as bio-adsorbents derived from locally accessible delonix regia seed and date seeds were explored for heavy metal environmental cleaning. These prepared biochars were characterized by proximate and elemental analyses, CHNS/O analysis, Fourier-transformed infrared spectroscopy and thermo-gravitational methods. Bio-sorbent's ability to adsorb arsenic ions in synthetic wastewater was studied and optimized at varying solution pH, adsorbent dose, and starting metal concentrations. Read More

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Autonomous magnetic microbots for environmental remediation developed by organic waste derived carbon dots.

J Environ Manage 2021 Jul 26;297:113322. Epub 2021 Jul 26.

Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, UP, India. Electronic address:

Biodegradable precursors for micro/nanobots development are key requirements for several sustainable applications. In this regard, we propose an innovative solution for water purification at minimum cost and efforts where organic waste is used for the treatment of organic pollutants. Herein, catalytic magnetic microbots were developed by functionalizing iron oxide nanoparticles with carbon dots (C-Dots), which were synthesized by using household waste such as potato peels as precursors. Read More

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Advancements in spontaneous microbial desalination technology for sustainable water purification and simultaneous power generation: A review.

J Environ Manage 2021 Jul 26;297:113374. Epub 2021 Jul 26.

Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India; Industrial Waste Utilization, Nano and Biomaterials, CSIR- Advanced Materials and Processes Research Institute (CSIR-AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India. Electronic address:

Population growth and rapid urbanization have put a lot of pressure on the already scarce freshwater around the globe. The availability of freshwater is not only limited but it is non-uniform also. Available desalination technologies help mitigate water shortage; however, these techniques are energy-intensive and unsustainable. Read More

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Separation of cathode particles and aluminum current foil in lithium-ion battery by high-voltage pulsed discharge Part II: Prospective life cycle assessment based on experimental data.

Waste Manag 2021 Jul 26;132:86-95. Epub 2021 Jul 26.

Department of Resources and Environmental Engineering, Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo Shinjuku-ku, Tokyo 169-8555, Japan; Department of Systems Innovation, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

This series of papers addresses the recycling of cathode particles and aluminum (Al) foil from positive electrode sheet (PE sheet) dismantled from spent lithium-ion batteries (LIBs) by applying a high-voltage pulsed discharge. As concluded in Part I of the series (Tokoro et al., 2021), cathode particles and Al foil were separated in water based on a single pulsed power application. Read More

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NaCl template-assisted synthesis of self-floating COFs foams for the efficient removal of sulfamerazine.

J Hazard Mater 2021 Jul 21;421:126702. Epub 2021 Jul 21.

Faculty of Materials Science and Chemistry, China University of Geosciences (Wuhan), No. 388, Lumo Road, Hongshan District, Wuhan 430074, PR China.

The preparation of hierarchical porous covalent organic frameworks (HP-COFs) is of great significance due to their inherent porosity and low density. However, it is still very challenging owing to the poor machinability of COFs. Herein, a simple and cost-efficient strategy for the synthesis of HP-COFs was proposed. Read More

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Removal of hexavalent chromium by biochar derived from Azadirachta indica leaves: Batch and column studies.

Chemosphere 2021 Jul 17;286(Pt 1):131598. Epub 2021 Jul 17.

Department of BioNano Technology, Gachon University, Seongnam, 13120, Republic of Korea. Electronic address:

This report details the preparation, characterization, and applications of an inexpensive adsorbent obtained from Azadirachta indica leaves (Neem biochar (NBC)) and used to remove Cr(VI) from the synthetic waste water. The obtained NBC was characterized by XRD, FTIR, FESEM, EDX and Zeta potential measurements. Adsorption experiments conducted at various pH levels confirmed that 58. Read More

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Fabrication of highly permeable and anti-fouling performance of Poly(ether ether sulfone) nanofiltration membranes modified with zinc oxide nanoparticles.

Chemosphere 2021 Jul 21;286(Pt 1):131616. Epub 2021 Jul 21.

Integrated Bioprocessing Laboratory, School of Bioengineering, SRM Institute of Science and Technology (SRM IST), Kattankulathur, Tamil Nadu, 603 203, India. Electronic address:

Membrane fouling is one of the challenging bottleneck problems in waste water treatment by membrane process. The present study constructed a nanofiltration membrane based on the zinc oxide nanoparticle (n-ZnO) integrated Poly(ether ether sulfone) (PEES) membranes. The developed membranes were characterized by X-ray diffraction (XRD), attenuated total reflectance - fourier transform infrared spectroscopy (AT-FTIR), atomic force microscopy (AFM) and scanning electron microscope (SEM) coupled with energy dispersive X-ray (EDX) analysis. Read More

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Regeneration and modelling of a phosphorous removal and recovery hybrid ion exchange resin after long term operation with municipal wastewater.

Chemosphere 2021 Jul 16;286(Pt 1):131581. Epub 2021 Jul 16.

Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Via Terracini 28, 40131, Bologna, Italy. Electronic address:

Adsorption represents one of the most promising process for phosphorous (P) removal and recovery from municipal wastewater, but questions about its long-term stability remain. The goals of this work were (i) to assess changes in morphology and adsorption performances of hybrid anion exchanger (HAIX) Layne after 2.5 years of operation in a 10 m d demonstration plant fed with secondary-treated municipal wastewater, (ii) to optimize the Layne regeneration procedure, and (iii) to evaluate the suitability of the ion exchange model to describe P adsorption on Layne. Read More

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Insight investigation of the on-site activated sludge reduction induced by metabolic uncoupler: Effects of 2,6-dichlorophenol on soluble microbial products, microbial activity, and environmental impact.

Chemosphere 2021 Jul 15;286(Pt 1):131575. Epub 2021 Jul 15.

State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China.

Metabolic uncoupling technology was one of the methods widely used to on-site control the production of excess sludge in wastewater treatment processes. However, the uncoupler effects on soluble microbial products (SMP), microbial activity, and environment impact have few been reported. This study showed that sludge yield was reduced by 33. Read More

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Progress and challenges of contaminate removal from wastewater using microalgae biomass.

Chemosphere 2021 Jul 22;286(Pt 1):131656. Epub 2021 Jul 22.

Centre for Green Technology, Faculty of Engineering and Information Technology, University of Technology Sydney, NSW, 2007, Australia. Electronic address:

The utilization of microalgae in treating wastewater has been an emerging topic focussed on finding an economically sustainable and environmentally friendly approach to treating wastewater. Over the last several years, different types of con microalgae and bacteria consortia have been experimented with to explore their potential in effectively treating wastewater from different sources. The basic features considered while determining efficiency is their capacity to remove nutrients including nitrogen (N) and phosphorus (P) and heavy metals like arsenic (As), lead (Pb), and copper (Cu). Read More

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Persistence and removal of trace organic compounds in centralized and decentralized wastewater treatment systems.

Chemosphere 2021 Jul 21;286(Pt 1):131621. Epub 2021 Jul 21.

School of Public Health, San Diego State University, San Diego, CA, 92182, USA.

The persistence of trace organic chemicals in treated effluent derived from both centralized wastewater treatment plants (WWTPs) and decentralized wastewater treatment systems (DEWATS) is of concern due to their potential impacts on human and ecosystem health. Here, we utilize non-targeted analysis (NTA) with comprehensive two-dimensional gas chromatography coupled with time of flight mass spectrometry (GC × GC/TOF-MS) to conduct an evaluation of the common persistent and removed compounds found in two centralized WWTPs in the USA and South Africa and one DEWATS in South Africa. Overall, removal efficiencies of chemicals were similar between the treatment plants when they were compared according to the number of chemical features detected in the influents and effluents of each treatment plant. Read More

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New emerging techniques for detection and degradation of hazardous materials in environments: Challenges and perspectives.

Chemosphere 2021 Jul 20;286(Pt 1):131589. Epub 2021 Jul 20.

Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran; Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey.

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Optimal selection of monitoring sites in cities for SARS-CoV-2 surveillance in sewage networks.

Environ Int 2021 Jul 12;157:106768. Epub 2021 Jul 12.

Catalan Institute for Water Research, Emili Grahit 101, 17003 Girona, Spain. Electronic address:

Selecting sampling points to monitor traces of SARS-CoV-2 in sewage at the intra-urban scale is no trivial task given the complexity of the networks and the multiple technical, economic and socio-environmental constraints involved. This paper proposes two algorithms for the automatic selection of sampling locations in sewage networks. The first algorithm, is for the optimal selection of a predefined number of sampling locations ensuring maximum coverage of inhabitants and minimum overlapping amongst selected sites (static approach). Read More

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Metagenomics of wastewater phageome identifies an extensively cored antibiotic resistome in a swine feedlot water treatment environment.

Ecotoxicol Environ Saf 2021 Jul 26;222:112552. Epub 2021 Jul 26.

College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China; Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, China; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Yangzhou 225009, China; International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou, Jiangsu 225009, China. Electronic address:

Huge number of antibiotic resistance genes (ARGs) have been widely detected in phage genomes from anthropogenic environment or animal farms, whereas little is known about the dynamic changes of phage contribution to resistance under a feedlot wastewater treatment facility (WTF) pressure. Here, a metagenomics method was used to characterize the sewage phageome and identifies the antibiotic resistome. The results showed that the phage families of Siphoviridae, Myoviridae, and Podoviridae were always the most dominant. Read More

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Patterns of pharmaceuticals use during the first wave of COVID-19 pandemic in Athens, Greece as revealed by wastewater-based epidemiology.

Sci Total Environ 2021 Jul 21;798:149014. Epub 2021 Jul 21.

Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece. Electronic address:

Since 2019, Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), impaired public health with considerable morbidity and mortality due to the lack of vaccines and effective treatment. The severe disease mainly harmed adults with predisposing medical comorbidities (such as heart disease, hypertension, chronic lung disease), while it can occur in healthy individuals that may be asymptomatic. Wastewater-based Epidemiology (WBE), a non-invasive, objective, chemical tool was used to monitor and estimate the changes in drug's consumption and prescription patterns under normal conditions (2019) and under COVID-19 pandemic conditions (2020). Read More

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Greenhouse gas budgets of severely polluted urban lakes in India.

Sci Total Environ 2021 Jul 12;798:149019. Epub 2021 Jul 12.

UK Centre for Ecology & Hydrology, Edinburgh, UK.

Inland waters are important sources of greenhouse gases and emissions from polluted subtropical systems may be contributing to the observed global increase in atmospheric methane concentrations. Here we detail a scoping study where dissolved concentrations of greenhouse gases methane (CH), carbon dioxide (CO) and nitrous oxide (NO) were measured in two contrasting urban lakes in Bangalore (Bengaluru), Karnataka, India, from June 2018 to February 2020. Bellandur Lake is a severely polluted system whilst Jakkur Lake has been subject to partial restoration via treatment of organic matter inputs. Read More

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Sources and Fate of the Anti-Androgenic Fluorescent Dye 4-Methyl-7-Diethylaminocoumarin in Small River Systems.

Environ Toxicol Chem 2021 Jul 29. Epub 2021 Jul 29.

UFZ - Helmholtz Centre for Environmental Research, 04318, Leipzig, Germany.

Recently, the potent antiandrogen 4-methyl-7-diethylaminocoumarin (C47), and its potential transformation products 4-methyl-7-ethylaminocoumarin (C47T1) and 4-methyl-7-aminocoumarin (C47T2) were identified as novel environmental contaminants. We assessed for the first time the sources, distribution and fate of these compounds in aquatic systems using the Holtemme river (Saxony-Anhalt, Germany), which is a hotspot for these contaminants. To this end, wastewater treatment plant influent and effluent samples, surface water samples over three years and the longitudinal profiles in water, sediment and gammarids were analyzed. Read More

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Biotechnological Aspects of Salt-Tolerant Xylanases: A Review.

J Agric Food Chem 2021 Jul 29. Epub 2021 Jul 29.

Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming, Yunnan 650500, People's Republic of China.

β-1,4-Xylan is the main component of hemicelluloses in land plant cell walls, whereas β-1,3-xylan is widely found in seaweed cell walls. Complete hydrolysis of xylan requires a series of synergistically acting xylanases. High-saline environments, such as saline-alkali lands and oceans, frequently occur in nature and are also involved in a broad range of various industrial processes. Read More

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A CuNi Alloy-Carbon Layer Core-Shell Catalyst for Highly Efficient Conversion of Aqueous Formaldehyde to Hydrogen at Room Temperature.

ACS Appl Mater Interfaces 2021 Jul 29. Epub 2021 Jul 29.

Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510643, China.

A copper (Cu) material is catalytically active for formaldehyde (HCHO) dehydrogenation to produce H, but the unsatisfactory efficiency and easy corrosion hinder its practical application. Alloying with other metals and coating a carbon layer outside are recognized as effective strategies to improve the catalytic activity and the long-term durability of nonprecious metal catalysts. Here, highly dispersed CuNi alloy-carbon layer core-shell nanoparticles ([email protected]) have been developed as a robust catalyst for efficient H generation from HCHO aqueous solution at room temperature. Read More

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Current and future perspectives for wastewater-based epidemiology as a monitoring tool for pharmaceutical use.

Sci Total Environ 2021 May 26;789:148047. Epub 2021 May 26.

Toxicological Centre, University of Antwerp, Belgium, Universiteitsplein 1, 2610 Antwerp, Belgium. Electronic address:

The medical and societal consequences of the misuse of pharmaceuticals clearly justify the need for comprehensive drug utilization research (DUR). Wastewater-based epidemiology (WBE) employs the analysis of human metabolic excretion products in wastewater to monitor consumption patterns of xenobiotics at the population level. Recently, WBE has demonstrated its potential to evaluate lifestyle factors such as illicit drug, alcohol and tobacco consumption at the population level, in near real-time and with high spatial and temporal resolution. Read More

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Water recovery and on-site reuse of laundry wastewater by a facile and cost-effective system: Combined biological and advanced oxidation process.

Sci Total Environ 2021 May 29;789:148068. Epub 2021 May 29.

Department of Environmental Health Engineering, Maragheh University of Medical Sciences, Maragheh, Iran. Electronic address:

Combined biological and physicochemical process was selected for treatment of laundry wastewater. The results show that after microbial adaptation, almost 91% of COD was removed at food to microorganism (F/M) ratio of 0.12 gBOD/gMLSS·d. Read More

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An investigation into the biological effects of indirect potable reuse water using zebrafish embryos.

Sci Total Environ 2021 May 24;789:147981. Epub 2021 May 24.

Brunel University London, Institute for Environment Health and Societies, UB8 3PH, UK. Electronic address:

Advanced treatment technologies are being assessed as a proactive measure to assist with the transformation of treated wastewater into a source of water for potable water production. We investigated the biological effects along an advanced water treatment pilot plant, using zebrafish embryos throughout early development. The study compared phenotypic observations with global transcriptome responses, enabling us to keep an open mind about the chemicals that might influence the biological activity. Read More

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Influence of cell lysis by Fenton oxidation on cryptic growth in sequencing batch reactor (SBR): Implication of reducing sludge source discharge.

Sci Total Environ 2021 May 26;789:148042. Epub 2021 May 26.

School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200000, China; National Engineering Research Center for Dyeing and Finishing of Textiles, Shanghai 201620, China. Electronic address:

The cell lysis-cryptic growth was implemented by Fenton oxidation in sequencing batch reactor. Optimizing sludge lysis condition could maximize the release of nutrients and sludge disintegration degree. After Fenton oxidation, the extracellular polymeric substance was obviously destroyed with the sludge average particle decreased from 64 μm to 36 μm. Read More

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Bisphenol A and its analogues in outdoor and indoor air: Properties, sources and global levels.

Sci Total Environ 2021 May 25;789:148013. Epub 2021 May 25.

Air Quality Processes Research Section, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada. Electronic address:

Bisphenol A (BPA) and its analogues are high-volume production organic synthetic compounds used in the synthesis of plastics. BPA has been categorized as an endocrine disrupting compound due to its ability to disrupt the hormonal makeup of living organisms. Air and dust are common sources of exposure of BPA for living organisms and most sources are anthropogenic and a result of thermal destruction of BPA containing materials, import and export of recyclable materials (especially e-waste) and fugitive emissions near BPA handling facilities. Read More

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An alternative approach for bioanalytical assay optimization for wastewater-based epidemiology of SARS-CoV-2.

Sci Total Environ 2021 May 26;789:148043. Epub 2021 May 26.

Laboratory for Microbiology, Parasitology and Hygiene, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.

Wastewater-based epidemiology of SARS-CoV-2 could play a role in monitoring the spread of the virus in the population and controlling possible outbreaks. However, sensitive sample preparation and detection methods are necessary to detect trace levels of SARS-CoV-2 RNA in influent wastewater (IWW). Unlike predecessors, method optimization of a SARS-CoV-2 RNA concentration and detection procedure was performed with IWW samples with high viral SARS-CoV-2 RNA loads. Read More

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Phosphorus recovery from wastewater by struvite in response to initial nutrients concentration and nitrogen/phosphorus molar ratio.

Sci Total Environ 2021 May 25;789:147970. Epub 2021 May 25.

Institute of HydroEcology, State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; Hubei Key Laboratory of Water System Science for Sponge City Construction, Wuhan University, Wuhan 430072, China.

Nutrients recovery from wastewater using struvite crystallization has received significant attention because the recovered nutrients can be used as a fertilizer in agriculture. However, the wastewater with different composition of nutrients might exert distinct struvite characteristics. The objective of this study is to explore the influence of nitrogen/phosphorus (N/P) molar ratio and initial nutrient concentrations on the phosphorus (P) recovery from wastewater and the crystallographic properties of struvite through batch experiments. Read More

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Detection of SARS-CoV-2 variants by genomic analysis of wastewater samples in Israel.

Sci Total Environ 2021 May 24;789:148002. Epub 2021 May 24.

Central Virology Laboratory, Ministry of Health, Chaim Sheba Medical Center, Ramat Gan, Israel. Electronic address:

Investigation of SARS-CoV-2 spread and identification of variants in sewers has been demonstrated to accurately detect prevalence of viral strains and is advantageous to clinical sampling in population catchment size. Herein, we utilized an established nationwide system of wastewater sampling and viral concentration approaches to perform large-scale surveillance of SARS-CoV-2 variants in nine different locations across Israel that were sampled from August 2020 to February 2021 and sequenced (n = 58). Viral sequences obtained from the wastewater samples had high coverages of the genome, and mutation analyses successfully identified the penetration of the B. Read More

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Initial-alkaline motivated fermentation of fine-sieving fractions and its effect on properties of cellulosic components.

Chemosphere 2021 Jul 2;284:131275. Epub 2021 Jul 2.

College of Civil Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China.

Exploration of value-added products from wastewater treatment plants (WWTPs) was promising for its sustainable development. This study simultaneously addressed the possibility of volatile fatty acids (VFAs) production boost and cellulosic components recovery from fine-sieving fractions (FSF) under initial alkaline conditions. The step utilization of FSF was relatively untapped in similar literatures. Read More

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