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https://www.readbyqxmd.com/read/28231666/-an-outbreak-of-paratyphoid-fever-in-a-county-of-yunnan-province-2010-2011
#1
S K Wang, Z G Wang, X H Zhang, B Yang, Q Wu, B Kan, Y H Zhou, R S Yang, M Y Yan
Objective: To identify the source and to comment on control program regarding an outbreak of paratyphoid A fever in a county, through field studies. Methods: Descriptive epidemiological methods were adopted to describe the epidemiological characteristics of the outbreak, which occurred in Yuanjiang county, Yunan province between 2010-2011, China. Case-control study with environmental investigation was performed to identify related risk factors and pathogens while isolation and susceptibility on the suspected pathogens were conducted...
February 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28231068/recent-advances-on-iron-oxide-magnetic-nanoparticles-as-sorbents-of-organic-pollutants-in-water-and-wastewater-treatment
#2
Angela M Gutierrez, Thomas D Dziubla, J Zach Hilt
The constant growth in population worldwide over the past decades continues to put forward the need to provide access to safe, clean water to meet human needs. There is a need for cost-effective technologies for water and wastewater treatment that can meet the global demands and the rigorous water quality standards and at the same maximizing pollutant efficiency removal. Current remediation technologies have failed in keeping up with these factors without becoming cost-prohibitive. Most recently, nanotechnology has been sought as the best alternative to increase access to water supplies by remediating those already contaminated and offering ways to access unconventional sources...
February 23, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28230914/decorating-waste-cloth-via-industrial-wastewater-for-tube-type-flexible-and-wearable-sodium-ion-batteries
#3
Yun-Hai Zhu, Shuang Yuan, Di Bao, Yan-Bin Yin, Hai-Xia Zhong, Xin-Bo Zhang, Jun-Min Yan, Qing Jiang
To turn waste into treasure, a facile and cost-effective strategy is developed to revive electroless nickel plating wastewater and cotton-textile waste toward a novel electrode substrate. Based on the substrate, a binder-free PB@GO@NTC electrode is obtained, which exhibits superior electrochemical performance. Moreover, for the first time, a novel tube-type flexible and wearable sodium-ion battery is successfully fabricated.
February 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28230079/organic-pollution-of-rivers-combined-threats-of-urbanization-livestock-farming-and-global-climate-change
#4
Yingrong Wen, Gerrit Schoups, Nick van de Giesen
Organic pollution of rivers by wastewater discharge from human activities negatively impacts people and ecosystems. Without treatment, pollution control relies on a combination of natural degradation and dilution by natural runoff to reduce downstream effects. We quantify here for the first time the global sanitation crisis through its impact on organic river pollution from the threats of (1) increasing wastewater discharge due to urbanization and intensification of livestock farming, and (2) reductions in river dilution capacity due to climate change and water extractions...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229558/microbial-diversity-of-a-full-scale-uasb-reactor-applied-to-poultry-slaughterhouse-wastewater-treatment-integration-of-16s-rrna-gene-amplicon-and-shotgun-metagenomic-sequencing
#5
Tiago Palladino Delforno, Gileno Vieira Lacerda Júnior, Melline F Noronha, Isabel K Sakamoto, Maria Bernadete A Varesche, Valéria M Oliveira
The 16S rRNA gene amplicon and whole-genome shotgun metagenomic (WGSM) sequencing approaches were used to investigate wide-spectrum profiles of microbial composition and metabolic diversity from a full-scale UASB reactor applied to poultry slaughterhouse wastewater treatment. The data were generated by using MiSeq 2 × 250 bp and HiSeq 2 × 150 bp Illumina sequencing platforms for 16S amplicon and WGSM sequencing, respectively. Each approach revealed a distinct microbial community profile, with Pseudomonas and Psychrobacter as predominant genus for the WGSM dataset and Clostridium and Methanosaeta for the 16S rRNA gene amplicon dataset...
February 23, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28229381/adsorption-of-ammonium-in-aqueous-solutions-by-pine-sawdust-and-wheat-straw-biochars
#6
Hye In Yang, Kangyi Lou, Anushka Upamali Rajapaksha, Yong Sik Ok, Anthony O Anyia, Scott X Chang
Ammonium (NH4(+)) is a common form of reactive nitrogen in wastewater, and its discharge to water bodies can lead to eutrophication. This study was conducted to understand NH4(+) adsorption mechanisms of pine sawdust and wheat straw biochars in aqueous solutions and the factors affecting NH4(+) removal. Biochars were produced by pyrolysing pine sawdust at 300 °C (PS300) and 550 °C (PS550) and wheat straw at 550 °C (WS550). Pseudo-second-order and Redlich-Peterson models best fitted the adsorption data...
February 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28229332/the-role-of-riboflavin-in-decolourisation-of-congo-red-and-bioelectricity-production-using-shewanella-oneidensis-mr1-under-mfc-and-non-mfc-conditions
#7
Ola M Gomaa, Segun Fapetu, Godfrey Kyazze, Tajalli Keshavarz
Dissimilatory metal reducing bacteria can exchange electrons extracellularly and hold great promise for their use in simultaneous wastewater treatment and electricity production. This study investigated the role of riboflavin, an electron carrier, in the decolourisation of Congo red in microbial fuel cells (MFCs) using Shewanella oneidensis MR-1 as a model organism. The contribution of the membrane-bound protein MtrC to the decolourisation process was also investigated. Within the range of riboflavin concentrations tested, 20 µM was found to be the best with >95% of the dye (initial concentration 200 mg/L) decolourised in MFCs within 50 h compared to 90% in the case where no riboflavin was added...
March 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28229216/enhanced-biotransformation-of-triclocarban-by-ochrobactrum-sp-tcc-1-under-anoxic-nitrate-respiration-conditions
#8
Hui Yun, Bin Liang, Deyong Kong, Zhiling Li, Guoshu Qi, Aijie Wang
Antimicrobial triclocarban (3,4,4'-trichlorocarbanilide, TCC) is frequently detected in soils and sediments for the widely reclaim of sewage sludge or biosolid in recent decades. This resulted from a weak removal of TCC during wastewater treatment, and most of it adsorbed onto sewage sludge. As the toxicity and persistence of TCC in the environment, the elimination of TCC from the source of output is of great importance, particularly in anoxic process. In this study, the biotransformation of TCC by a newly isolated TCC-degrading strain Ochrobactrum sp...
February 22, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28229155/sulfate-radical-oxidation-of-aromatic-contaminants-a-detailed-assessment-of-density-functional-theory-and-high-level-quantum-chemical-methods
#9
Sangavi Pari, Inger A Wang, Haizhou Liu, Bryan M Wong
Advanced oxidation processes that utilize highly oxidative radicals are widely used in water reuse treatment. In recent years, the application of sulfate radical (SO4˙(-)) as a promising oxidant for water treatment has gained increasing attention. To understand the efficiency of SO4˙(-) in the degradation of organic contaminants in wastewater effluent, it is important to be able to predict the reaction kinetics of various SO4˙(-)-driven oxidation reactions. In this study, we utilize density functional theory (DFT) and high-level wavefunction-based methods (including computationally-intensive coupled cluster methods), to explore the activation energies of SO4˙(-)-driven oxidation reactions on a series of benzene-derived contaminants...
February 23, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28228239/spatial-distribution-and-removal-performance-of-pharmaceuticals-in-municipal-wastewater-treatment-plants-in-china
#10
Hou-Qi Liu, James C W Lam, Wen-Wei Li, Han-Qing Yu, Paul K S Lam
Municipal wastewater treatment plants (WWTPs) are an important source of pharmaceuticals released into the environment. Understanding how various pharmaceuticals are distributed and handled in WWTPs is a prerequisite to optimize their abatement. Here we investigated the spatial distribution and removal efficiencies pharmaceuticals in China's WWTPs. A total of 35 pharmaceuticals in wastewater samples from 12 WWTPs at different cities of China were analyzed. Among these detected pharmaceuticals, caffeine showed the highest concentration (up to 1775...
February 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28228236/inhibition-of-an-enriched-culture-of-ammonia-oxidizing-bacteria-by-two-different-nanoparticles-silver-and-magnetite
#11
Camila Michels, Simone Perazzoli, Hugo M Soares
Metal and metal oxide nanoparticles are getting attention over the past years. They can be used to several purposes, especially in commercial and medical applications. Undoubtedly, this lead to higher production and, consequently, increasing the risks of exposition, once they can be released into environment without a proper control. However, their impact over the bacteria present in wastewater treatment plants (WWTP), manly over nitrifying bacteria, which are the most susceptible to toxic compounds, are still not very well established...
February 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28226277/distribution-of-trace-metals-cu-pb-ni-zn-between-particulate-colloidal-and-truly-dissolved-fractions-in-wastewater-treatment
#12
Andrew J Hargreaves, Peter Vale, Jonathan Whelan, Carlos Constantino, Gabriela Dotro, Pablo Campo, Elise Cartmell
The distribution of Cu, Pb, Ni and Zn between particulate, colloidal and truly dissolved size fractions in wastewater from a trickling filter treatment plant was investigated. Samples of influent, primary effluent, humus effluent, final effluent and sludge holding tank returns were collected and separated into particulate (i.e. > 0.45 μm), colloidal (i.e. 1 kDa to 0.45 μm), and truly dissolved (i.e. < 1 kDa) fractions using membrane filters. In the influent, substantial proportions of Cu (60%), Pb (67%), and Zn (32%) were present in the particulate fraction which was removed in conjunction with suspended particles at the works in subsequent treatment stages...
February 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28226260/temporal-performance-assessment-of-wastewater-treatment-plants-by-using-multivariate-statistical-analysis
#13
Milad Ebrahimi, Erin L Gerber, Thomas D Rockaway
For most water treatment plants, a significant number of performance data variables are attained on a time series basis. Due to the interconnectedness of the variables, it is often difficult to assess over-arching trends and quantify operational performance. The objective of this study was to establish simple and reliable predictive models to correlate target variables with specific measured parameters. This study presents a multivariate analysis of the physicochemical parameters of municipal wastewater. Fifteen quality and quantity parameters were analyzed using data recorded from 2010 to 2016...
February 19, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28226246/improvement-of-virus-removal-by-pilot-scale-coagulation-ultrafiltration-process-for-wastewater-reclamation-effect-of-optimization-of-ph-in-secondary-effluent
#14
S Lee, M Ihara, N Yamashita, H Tanaka
Reclaimed water (i.e., reused advanced-treated wastewater) offers an alternative water resource. To reduce the health risks associated with its use, efficient virus removal such as with advanced wastewater treatment processes is important. Virus removal by coagulation followed by ultrafiltration (UF) for the treatment of drinking water has been well examined. But its efficacy in wastewater reclamation purpose using secondary treated effluent (SE) from wastewater treatment plant (WWTP) as feed water is unclear...
February 9, 2017: Water Research
https://www.readbyqxmd.com/read/28224339/wastewater-treatment-and-public-health-in-nunavut-a-microbial-risk-assessment-framework-for-the-canadian-arctic
#15
Kiley Daley, Rob Jamieson, Daniel Rainham, Lisbeth Truelstrup Hansen
Wastewater management in Canadian Arctic communities is influenced by several geographical factors including climate, remoteness, population size, and local food-harvesting practices. Most communities use trucked collection services and basic treatment systems, which are capable of only low-level pathogen removal. These systems are typically reliant solely on natural environmental processes for treatment and make use of existing lagoons, wetlands, and bays. They are operated in a manner such that partially treated wastewater still containing potentially hazardous microorganisms is released into the terrestrial and aquatic environment at random times...
February 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28224336/influence-of-silver-nanoparticles-and-liberated-silver-ions-on-nitrifying-sludge-ammonia-oxidation-inhibitory-kinetics-and-mechanism
#16
Nguyen Thanh Giao, Tawan Limpiyakorn, Pattaraporn Kunapongkiti, Pumis Thuptimdang, Sumana Siripattanakul-Ratpukdi
Silver nanoparticles (AgNPs) are widely used in commercial products because of their excellent antimicrobial activity. Entrance of AgNPs and its released Ag ions (Ag(+)) into wastewater treatment plants could harm ammonia oxidation (AO) process resulting in environmental problems. This study investigated inhibitory kinetics and mechanism of AO from nitrifying sludge influenced by AgNPs and Ag(+). The findings demonstrated that AgNPs and Ag(+) adversely influenced on AO. Silver ions were more toxic to AO than AgNPs, which was indicated by the lower inhibitory constant (K i ) of 0...
February 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28223460/mechanism-of-h2s-oxidation-by-the-dissimilatory-perchlorate-reducing-microorganism-azospira-suillum-ps
#17
Misha G Mehta-Kolte, Dana Loutey, Ouwei Wang, Matthew D Youngblut, Christopher G Hubbard, Kelly M Wetmore, Mark E Conrad, John D Coates
The genetic and biochemical basis of perchlorate-dependent H2S oxidation (PSOX) was investigated in the dissimilatory perchlorate-reducing microorganism (DPRM) Azospira suillum PS (PS). Previously, it was shown that all known DPRMs innately oxidize H2S, producing elemental sulfur (S(o)). Although the process involving PSOX is thermodynamically favorable (ΔG°' = -206 kJ ⋅ mol(-1) H2S), the underlying biochemical and genetic mechanisms are currently unknown. Interestingly, H2S is preferentially utilized over physiological electron donors such as lactate or acetate although no growth benefit is obtained from the metabolism...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28223080/novel-process-combining-anaerobic-aerobic-digestion-and-ion-exchange-resin-for-full-recycling-of-cassava-stillage-in-ethanol-fermentation
#18
Xinchao Yang, Ke Wang, Huijun Wang, Jianhua Zhang, Zhonggui Mao
A novel cleaner ethanol production process has been developed. Thin stillage is treated initially by anaerobic digestion followed by aerobic digestion and then further treated by chloride anion exchange resin. This allows the fully-digested and resin-treated stillage to be completely recycled for use as process water in the next ethanol fermentation batch, which eliminates wastewater discharges and minimizes consumption of fresh water. The method was evaluated at the laboratory scale. Process parameters were very similar to those found using tap water...
February 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28222952/esters-production-via-carboxylates-from-anaerobic-paper-mill-wastewater-treatment
#19
Carlos I Cabrera-Rodríguez, Mónica Moreno-González, Florence A de Weerd, Vidhvath Viswanathan, Luuk A M van der Wielen, Adrie J J Straathof
This paper describes a new option for integrated recovery and esterification of carboxylates produced by anaerobic digestion at a pH above the pKa. The carboxylates (acetate, propionate, butyrate, valerate and lactate) are recovered using a strong anion exchange resin in the bicarbonate form, and the resin is regenerated using a CO2-expanded alcohol technique, which allows for low chemicals consumption and direct esterification. Paper mill wastewater was used to study the effect of pH and the presence of other inorganic anions and cations on the adsorption and desorption with CO2-expanded methanol...
February 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28222926/carbon-dioxide-emissions-from-a-septic-tank-soakaway-in-a-northern-maritime-climate
#20
Celia Somlai-Haase, Jan Knappe, Laurence Gill
Here, we present the first attempt to quantify long-term and diurnal variations of CO2 fluxes from a soakaway of an on-site wastewater treatment system serving a single house located in a northern maritime climate (Ireland). An automated soil gas flux chamber system was deployed semi-continuously over a period of 17months, recording hourly flux measurements from the soakaway (Fsoak) and a control site (Fcontrol). Soil gas fluxes expressed seasonal and diurnal variations: Fsoak and Fcontrol ranged from 0.43 to 100...
February 17, 2017: Science of the Total Environment
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