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Water Research

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https://www.readbyqxmd.com/read/28550813/a-reliable-sewage-quality-abnormal-event-monitoring-system
#1
Tianling Li, Melissa Winnel, Hao Lin, Jared Panther, Chang Liu, Roger O'Halloran, Kewen Wang, Taicheng An, Po Keung Wong, Shanqing Zhang, Huijun Zhao
With closing water loop through purified recycled water, wastewater becomes a part of source water, requiring reliable wastewater quality monitoring system (WQMS) to manage wastewater source and mitigate potential health risks. However, the development of reliable WQMS is fatally constrained by severe contamination and biofouling of sensors due to the hostile analytical environment of wastewaters, especially raw sewages, that challenges the limit of existing sensing technologies. In this work, we report a technological solution to enable the development of WQMS for real-time abnormal event detection with high reliability and practicality...
May 20, 2017: Water Research
https://www.readbyqxmd.com/read/28549262/passive-sampling-of-wastewater-as-a-tool-for-the-long-term-monitoring-of-community-exposure-illicit-and-prescription-drug-trends-as-a-proof-of-concept
#2
J A Baz-Lomba, Christopher Harman, Malcolm Reid, Kevin V Thomas
A passive sampling device, the Polar Organic Chemical Integrative Sampler (POCIS), was calibrated in-situ over a 4-week period in Oslo (Norway) for 10 illicit drugs and pharmaceuticals with the goal of developing an approach for monitoring long-term wastewater drug loads. The calibrations were performed in triplicate using three different overlapping calibration sets under changing environmental conditions that allowed the uncertainty of the sampling rates to be evaluated. All 10 compounds exhibited linear uptake kinetics and provided sampling rates of between 0...
May 20, 2017: Water Research
https://www.readbyqxmd.com/read/28551509/bacteriophage-removal-efficiency-as-a-validation-and-operational-monitoring-tool-for-virus-reduction-in-wastewater-reclamation-review
#3
REVIEW
Mohan Amarasiri, Masaaki Kitajima, Thanh H Nguyen, Satoshi Okabe, Daisuke Sano
The multiple-barrier concept is widely employed in international and domestic guidelines for wastewater reclamation and reuse for microbiological risk management, in which a wastewater reclamation system is designed to achieve guideline values of the performance target of microbe reduction. Enteric viruses are one of the pathogens for which the target reduction values are stipulated in guidelines, but frequent monitoring to validate human virus removal efficacy is challenging in a daily operation due to the cumbersome procedures for virus quantification in wastewater...
May 19, 2017: Water Research
https://www.readbyqxmd.com/read/28550812/molecular-characterization-of-human-adenoviruses-in-urban-wastewaters-using-next-generation-and-sanger-sequencing
#4
M Iaconelli, B Valdazo-González, M Equestre, A R Ciccaglione, C Marcantonio, S Della Libera, G La Rosa
Human adenoviruses (HAdVs) are of major public health importance and are associated with a variety of clinical manifestations, including gastroenteritis, respiratory, ocular and urinary tract infections. To study the occurrence, prevalence and diversity of HAdV species and types circulating in Italy, we conducted a large-scale molecular-epidemiological investigation, a yearlong monitoring of 22 wastewater treatment plants, covering 10 Italian regions, representative of northern, central, and southern Italy...
May 19, 2017: Water Research
https://www.readbyqxmd.com/read/28550811/influence-of-solids-residence-time-and-carbon-storage-on-nitrogen-and-phosphorus-recovery-by-microalgae-across-diel-cycles
#5
D A Gardner-Dale, I M Bradley, J S Guest
Microalgal treatment systems could advance nutrient recovery from wastewater by achieving effluent nitrogen (N) and phosphorus (P) levels below the current limit of technology, but their successful implementation requires an understanding of how design decisions influence nutrient uptake over daily (i.e., diel) cycles. This work demonstrates the ability to influence microalgal N:P recovery ratio via solids residence time (SRT) while maintaining complete nutrient removal across day/night cycles through carbon storage and mobilization...
May 18, 2017: Water Research
https://www.readbyqxmd.com/read/28535433/a-highly-selective-surface-coating-for-enhanced-membrane-rejection-of-endocrine-disrupting-compounds-mechanistic-insights-and-implications
#6
Hao Guo, Yu Deng, Zhikan Yao, Zhe Yang, Jianqiang Wang, Chuner Lin, Tong Zhang, Baoku Zhu, Chuyang Y Tang
We designed a highly selective surface coating to achieve enhanced rejection of endocrine disrupting compounds (EDCs) by nanofiltration membranes. A commercial NF90 membrane was first coated with polydopamine (PDA) followed by in situ immobilization of silver nanoparticles (AgNPs). This PDA/AgNPs coating greatly improved EDC rejection at the expense of slight water permeability loss (4-10%). This improvement in rejection can be attributed to a combination of enhanced size exclusion and suppressed hydrophobic interaction...
May 18, 2017: Water Research
https://www.readbyqxmd.com/read/28544990/degradation-of-mecoprop-in-polluted-landfill-leachate-and-waste-water-in-a-moving-bed-biofilm-reactor
#7
Mònica Escolà Casas, Tue Kjærgaard Nielsen, Witold Kot, Lars Hestbjerg Hansen, Anders Johansen, Kai Bester
Mecoprop is a common pollutant in effluent-, storm- and groundwater as well as in leachates from derelict dumpsites. Thus, bioremediation approaches may be considered. We conducted batch experiments with moving bed biofilm (MBBR)-carriers to understand the degradation of mecoprop. As a model, the carriers were incubated in effluent from a conventional wastewater treatment plant which was spiked to 10, 50 and 100 μg L(-1) mecoprop. Co-metabolic processes as well as mineralization were studied. Initial mecoprop concentration and mecoprop degradation impacted the microbial communities...
May 17, 2017: Water Research
https://www.readbyqxmd.com/read/28527979/degradation-of-chloramphenicol-by-uv-chlorine-treatment-kinetics-mechanism-and-enhanced-formation-of-halonitromethanes
#8
Huiyu Dong, Zhimin Qiang, Jun Hu, Jiuhui Qu
Ultraviolet (UV)/chlorine process is considered as an emerging advanced oxidation process for the degradation of micropollutants. This study investigated the degradation of chloramphenicol (CAP) and formation of disinfection by-products (DBPs) during the UV/chlorine treatment. It was found that CAP degradation was enhanced by combined UV/chlorine treatment compared to that of UV and chlorination treatment alone. The pseudo-first-order rate constant of the UV/chlorine process at pH 7.0 reached 0.016 s(-1), which was 10...
May 17, 2017: Water Research
https://www.readbyqxmd.com/read/28527978/enhanced-antimony-v-removal-using-synergistic-effects-of-fe-hydrolytic-flocs-and-ultrafiltration-membrane-with-sludge-discharge-evaluation
#9
Baiwen Ma, Xing Wang, Ruiping Liu, Zenglu Qi, William A Jefferson, Huachun Lan, Huijuan Liu, Jiuhui Qu
The integration of adsorbents with ultrafiltration (UF) membranes is a promising method for alleviating membrane fouling and reducing land use. However, a number of problems have become apparent concerning the granular adsorbents used currently, such as high running cost, high chance of causing membrane surface damage, low in situ chemical cleaning efficiency, etc. Herein, to overcome these disadvantages, loose in situ hydrolyzed flocs were directly injected into the membrane tank, providing strong adsorption ability at low cost...
May 13, 2017: Water Research
https://www.readbyqxmd.com/read/28527390/on-filter-direct-amplification-of-legionella-pneumophila-for-rapid-assessment-of-its-abundance-and-viability
#10
Farag A Samhan, Tiffany M Stedtfeld, Hassan Waseem, Maggie R Williams, Robert D Stedtfeld, Syed A Hashsham
Guidelines and regulations to control Legionella pneumophila in cooling water systems of large buildings are evolving due to the increasing number of outbreaks. Rapid, on-site, simple, and sensitive quantification methods that are also able to assess viability may be extremely useful in monitoring and control. Culture-based methods for measuring L. pneumophila may take 4-10 days and qPCR-based methods are also slow, requiring at least a day from sample to result, albeit mainly due to the need for sample transport to a centralized laboratory...
May 13, 2017: Water Research
https://www.readbyqxmd.com/read/28521237/pilot-plant-demonstration-of-stable-and-efficient-high-rate-biological-nutrient-removal-with-low-dissolved-oxygen-conditions
#11
Natalie A Keene, Steve R Reusser, Matthew J Scarborough, Alan L Grooms, Matt Seib, Jorge Santo Domingo, Daniel R Noguera
Aeration in biological nutrient removal (BNR) processes accounts for nearly half of the total electricity costs at many wastewater treatment plants. Even though conventional BNR processes are usually operated to have aerated zones with high dissolved oxygen (DO) concentrations, recent research has shown that nitrification can be maintained using very low-DO concentrations (e.g., below 0.2 mg O2/L), and therefore, it may be possible to reduce energy use and costs in BNR facilities by decreasing aeration. However, the effect of reduced aeration on enhanced biological phosphorus removal (EBPR) is not understood...
May 13, 2017: Water Research
https://www.readbyqxmd.com/read/28527389/dynamics-of-dissolved-organic-matter-in-riverine-sediments-affected-by-weir-impoundments-production-benthic-flux-and-environmental-implications
#12
Meilian Chen, Sung-Han Kim, Heon-Jae Jung, Jung-Ho Hyun, Jung Hyun Choi, Hyo-Jin Lee, In-Ae Huh, Jin Hur
In order to understand the characteristics and dynamics of dissolved organic matter (DOM) in the sediment of rivers affected by impoundments, we examined the vertical profiles and the benthic fluxes of DOM in four different core sediments located at upstream sites of weirs in major rivers of South Korea. In three out of four sites, exponential accumulation of dissolved organic carbon (DOC) with depth was observed with the signature of seasonal variability. Except for the site displaying a below-detection limit of Fe(II), the general accumulation trends of DOC with depth was concurrent with the increases of Fe(II) and NH4(+) and the decrease of PO4(3-), signifying a close linkage of the DOM dynamics with anaerobic respiration via iron reduction, an important early diagenesis pathway...
May 12, 2017: Water Research
https://www.readbyqxmd.com/read/28525783/toolset-for-assessment-of-natural-recovery-from-legacy-contaminated-sediment-case-study-of-pallanza-bay-lake-maggiore-italy
#13
Diana Lin, Yeo-Myoung Cho, Amy Oen, Espen Eek, Jake P Tommerdahl, Richard G Luthy
The aim of this study was to develop a toolset that can be used by site managers to assess and monitor natural attenuation processes in sediments contaminated with legacy hydrophobic organic contaminants. The toolset is composed of sediment traps to measure quality and deposition rate of incoming sediment under different hydrodynamic conditions, sediment cores to show trends in sediment bed concentrations over time, and passive samplers attached to a porewater probe frame to assess the mobility of buried contaminants and possible contaminant flux from sediment...
May 12, 2017: Water Research
https://www.readbyqxmd.com/read/28525785/denitrifying-woodchip-bioreactor-and-phosphorus-filter-pairing-to-minimize-pollution-swapping
#14
Laura E Christianson, Christine Lepine, Philip L Sibrell, Chad Penn, Steven T Summerfelt
Pairing denitrifying woodchip bioreactors and phosphorus-sorbing filters provides a unique, engineered approach for dual nutrient removal from waters impaired with both nitrogen (N) and phosphorus (P). This column study aimed to test placement of two P-filter media (acid mine drainage treatment residuals and steel slag) relative to a denitrifying system to maximize N and P removal and minimize pollution swapping under varying flow conditions (i.e., woodchip column hydraulic retention times (HRTs) of 7.2, 18, and 51 h; P-filter HRTs of 7...
May 11, 2017: Water Research
https://www.readbyqxmd.com/read/28521238/transcriptomic-approach-for-assessment-of-the-impact-on-microalga-and-macrophyte-of-in-situ-exposure-in-river-sites-contaminated-by-chlor-alkali-plant-effluents
#15
Perrine Dranguet, Claudia Cosio, Séverine Le Faucheur, Rebecca Beauvais-Flück, Aline Freiburghaus, Isabelle A M Worms, Brice Petit, Natacha Civic, Mylène Docquier, Vera I Slaveykova
Water quality degradation is a worldwide problem, but risk evaluation of chronic pollution in-situ is still a challenge. The present study aimed to evaluate the potential of transcriptomic analyses in representative aquatic primary producers to assess the impact of environmental pollution in-situ: the microalga Chlamydomonas reinhardtii and the macrophyte Elodea nuttallii were exposed 2 h in the Babeni Reservoir of the Olt River impacted by chlor-alkali plant effluent release resulting in increased concentrations of Hg and NaCl in receiving water...
May 11, 2017: Water Research
https://www.readbyqxmd.com/read/28521239/seabed-gallery-intakes-investigation-of-the-water-pretreatment-effectiveness-of-the-active-layer-using-a-long-term-column-experiment
#16
Abdullah H A Dehwah, Thomas M Missimer
Seabed gallery intake systems used for seawater reverse osmosis facilities employ the same principle of water treatment as slow sand filtration in freshwater systems. An investigation concerning the effectiveness of the active layer (top layer) in improving raw water quality was conducted by using a long-term bench-scale columns experiment. Two different media types, silica and carbonate sand, were tested in 1 m columns to evaluate the effectiveness of media type in terms of algae, bacteria, Natural Organic Matter (NOM) and Transparent Exopolymer Particles (TEP) removal over a period of 620 days...
May 10, 2017: Water Research
https://www.readbyqxmd.com/read/28511041/biofilm-formation-and-granule-properties-in-anaerobic-digestion-at-high-salinity
#17
M C Gagliano, S B Ismail, A J M Stams, C M Plugge, H Temmink, J B Van Lier
For the anaerobic biological treatment of saline wastewater, Anaerobic Digestion (AD) is currently a possibility, even though elevated salt concentrations can be a major obstacle. Anaerobic consortia and especially methanogenic archaea are very sensitive to fluctuations in salinity. When working with Upflow Sludge Blanket Reactor (UASB) technology, in which the microorganisms are aggregated and retained in the system as a granular biofilm, high sodium concentration negatively affects aggregation and consequently process performances...
May 10, 2017: Water Research
https://www.readbyqxmd.com/read/28505530/photocatalytic-wastewater-purification-with-simultaneous-hydrogen-production-using-mos2-qd-decorated-hierarchical-assembly-of-znin2s4-on-reduced-graphene-oxide-photocatalyst
#18
Shuqu Zhang, Longlu Wang, Chengbin Liu, Jinming Luo, John Crittenden, Xia Liu, Tao Cai, Jili Yuan, Yong Pei, Yutang Liu
It is attractive to photocatalytically purify wastewater and simultaneously convert solar energy into clean hydrogen energy. However, it is still a challenge owing to the relatively low photocatalytic efficiency of photocatalysts. In this study, we synthesized a molybdenum disulfide (MoS2) quantum dot-decorated 3D nanoarchitecture (MoS2QDs) of indium zinc sulfide (ZnIn2S4) and reduced grapheme oxide (MoS2QDs@ZnIn2S4@RGO) photocatalyst using a simple solvothermal method. The RGO promotes the electron transfer, and the highly dispersed MoS2QDs provides numerous catalytic sites...
May 10, 2017: Water Research
https://www.readbyqxmd.com/read/28538189/evaluation-of-methods-to-sample-fecal-indicator-bacteria-in-foreshore-sand-and-pore-water-at-freshwater-beaches
#19
Laura J Vogel, Thomas A Edge, Denis M O'Carroll, Helena M Solo-Gabriele, Caitlin S E Kushnir, Clare E Robinson
Fecal indicator bacteria (FIB) are known to accumulate in foreshore beach sand and pore water (referred to as foreshore reservoir) where they act as a non-point source for contaminating adjacent surface waters. While guidelines exist for sampling surface waters at recreational beaches, there is no widely-accepted method to collect sand/sediment or pore water samples for FIB enumeration. The effect of different sampling strategies in quantifying the abundance of FIB in the foreshore reservoir is unclear. Sampling was conducted at six freshwater beaches with different sand types to evaluate sampling methods for characterizing the abundance of E...
May 9, 2017: Water Research
https://www.readbyqxmd.com/read/28527388/abiotic-transformation-of-hexabromocyclododecane-by-sulfidated-nanoscale-zerovalent-iron-kinetics-mechanism-and-influencing-factors
#20
Dan Li, Xifen Zhu, Yin Zhong, Weilin Huang, Ping'an Peng
Recent studies showed that sulfidated nanoscale zerovalent iron (S-nZVI) is a better reducing agent than nanoscale zerovalen iron (nZVI) alone for reductive dechlorination of several organic solvents such as trichloroethylene (TCE) due to the catalytic role of iron sulfide (FeS). We measured the rates of transformation of hexabromocyclododecane (HBCD) by S-nZVI and compared them to those by FeS, nZVI, and reduced sulfur species. The results showed that: i) HBCD (20 mg L(-1)) was almost completely transformed by S-nZVI (0...
May 9, 2017: Water Research
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