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Water Science and Technology: a Journal of the International Association on Water Pollution Research

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https://www.readbyqxmd.com/read/28617292/corrigendum-water-science-and-technology-75-4-987-997-evaluation-of-the-relative-roles-of-a-vegetative-filter-strip-and-a-biofiltration-swale-in-a-treatment-train-for-road-runoff-kelsey-flanagan-philippe-branchu-david-ramier-and-marie-christine-gromaire-doi
#1
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No abstract text is available yet for this article.
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617291/optimizing-external-carbon-source-addition-in-domestics-wastewater-treatment-based-on-online-sensoring-data-and-a-numerical-model
#2
Qibin Wang, Qiuwen Chen, Jing Chen
The removal of total nitrogen in wastewater treatment plants (WWTPs) is often unsatisfactory for a variety of reasons. One possible measure to improve nitrogen removal is the addition of external carbon. However, the amount of carbon addition is directly related to WWTP operation costs, highlighting the importance of accurately determining the amount of external carbon required. The objective of this study was to obtain a low nitrate concentration in the anoxic zone of WWTPs efficiently and economically by optimizing the external carbon source dosage...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617290/micro-zooplankton-grazing-as-a-means-of-fecal-bacteria-removal-in-stormwater-bmps
#3
Jade M Burtchett, Michael A Mallin, Lawrence B Cahoon
A priority for environmental managers is control of stormwater runoff pollution, especially fecal microbial pollution. This research was designed to determine if fecal bacterial grazing by micro-zooplankton is a significant control on fecal bacteria in aquatic best management practices (BMPs); if grazing differs between a wet detention pond and a constructed wetland; and if environmental factors enhance grazing. Both 3-day grazing tests and 24-h dilution assays were used to determine grazing differences between the two types of BMP...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617289/study-on-method-and-mechanism-of-deep-well-circulation-for-the-growth-control-of-microcystis-in-aquaculture-pond
#4
Haibing Cong, Feng Sun, Jun Wu, Yue Zhou, Qi Yan, Ao Ren, Hu Xu
In order to control the growth of Microcystis in aquaculture ponds and reduce its adverse effect on water quality and aquaculture, a production-scale experiment of deep well circulation treatment was carried out in an aquaculture pond with water surface area of 63,000 m(2) and water depth of 1.6-2.0 m. Compared with the control pond, the experiment pond had better water quality as indicated by 64.2% reduction in chlorophyll a, and 81.1% reduction in algal cells. The chemical oxygen demand, total nitrogen, and total phosphorus concentration were reduced by 55...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617288/fate-of-selected-pharmaceutically-active-compounds-in-the-integrated-fixed-film-activated-sludge-process
#5
K J Murray, W J Parker, L M Bragg, M R Servos
The potential for integrated fixed film activated sludge (IFAS) processes to achieve enhanced transformation of pharmaceuticals relative to conventional activated sludge (CAS) processes was assessed. Previous studies have focused on direct comparisons of parallel reactors with and without fixed film carriers and little information is available on the impacts of how varying operating parameters impact the differences in observed pharmaceutical compound (PC) transformation capabilities between CAS reactors and those equipped with both an activated sludge (AS) and fixed film carriers...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617287/controlling-the-cod-removal-of-an-a-stage-pilot-study-with-instrumentation-and-automatic-process-control
#6
Mark W Miller, Matt Elliott, Jon DeArmond, Maureen Kinyua, Bernhard Wett, Sudhir Murthy, Charles B Bott
The pursuit of fully autotrophic nitrogen removal via the anaerobic ammonium oxidation (anammox) pathway has led to an increased interest in carbon removal technologies, particularly the A-stage of the adsorption/bio-oxidation (A/B) process. The high-rate operation of the A-stage and lack of automatic process control often results in wide variations of chemical oxygen demand (COD) removal that can ultimately impact nitrogen removal in the downstream B-stage process. This study evaluated the use dissolved oxygen (DO) and mixed liquor suspended solids (MLSS) based automatic control strategies through the use of in situ on-line sensors in the A-stage of an A/B pilot study...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617286/improving-the-microbiological-quality-of-the-ruhr-river-near-essen-comparing-costs-and-effects-for-the-reduction-of-escherichia-coli-and-intestinal-enterococci
#7
Katharina Tondera, Kassandra Klaer, Silke Roder, Ira Brueckner, Johannes Pinnekamp
After rain events in densely populated areas, combined sewer overflows (CSOs) can have severe health-related effects upon surface water quality, as well as diffuse overland runoff and wastewater treatment plants (WWTPs). All of these sources emit pathogens and fecal indicator bacteria into the surface water, which the EU Bathing Water Directive addresses by giving threshold values for the indicators Escherichia coli and intestinal enterococci. This study presents a comparison between 21 scenarios of costs for processes that reduce the load of Escherichia coli and intestinal enterococci into the Ruhr River during and shortly after rain events...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617285/assessment-of-the-technological-reliability-of-a-hybrid-constructed-wetland-for-wastewater-treatment-in-a-mountain-eco-tourist-farm-in-poland
#8
Andrzej Jucherski, Maria Nastawny, Andrzej Walczowski, Krzysztof Jóźwiakowski, Magdalena Gajewska
The aim of the present study was to assess the technological reliability of a domestic hybrid wastewater treatment installation consisting of a classic three-chambered (volume 6 m(3)) septic tank, a vertical flow trickling bed filled with granules of a calcinated clay material (KERAMZYT), a special wetland bed constructed on a slope, and a permeable pond used as a receiver. The test treatment plant was located at a mountain eco-tourist farm on the periphery of the spa municipality of Krynica-Zdrój, Poland...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617284/dynamic-changes-of-bacterial-community-in-activated-sludge-with-pressurized-aeration-in-a-sequencing-batch-reactor
#9
Yong Zhang, Wei-Li Jiang, Yang Qin, Guo-Xiang Wang, Rui-Xiao Xu, Biao Xie
This study aimed to investigate the organic removal efficiency and microbial population dynamics in activated sludge with pressurized aeration. The activated sludge was fed with synthetic wastewater composed of simple carbon source to avoid the effect of complex components on microbial communities. The pressurized acclimation process was conducted in a bench-scale sequencing batch reactor (SBR) under 0.3 MPa gage pressure. Another SBR was running in atmospheric environment as a control reactor, with the same operation parameters except for the pressure...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617283/biosorption-of-six-basic-and-acidic-dyes-on-brown-alga-sargassum-ilicifolium-optimization-kinetic-and-isotherm-studies
#10
Reza Tabaraki, Negar Sadeghinejad
Biosorption of Methyl Blue (MB), Fuchsin Acid (FA), Rhodamine B (RB), Methylene Blue (MEB), Bromocresol purple (BC) and Methyl Orange (MO) onto Sargassum ilicifolium was studied in a batch system. Effect of dye structure on biosorption by Sargassum ilicifolium was studied to define the correlation between chemical structure and biosorption capacity. Different dye groups such as triarylmethane (MB, FA and BC), monoazo (MO), thiazine (MEB) and xanthene (RB) were studied. At optimum experimental conditions for each dye, biosorption capacity was determined and compared...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617282/hg-removal-and-the-effects-of-coexisting-metals-in-forward-osmosis-and-membrane-distillation
#11
Chia-Yu Wu, Shiao-Shing Chen, Dai-Zhou Zhang, Jun Kobayashi
In this study, we investigate the rejection of Hg, Cd, and Pb and the effect of coexisting metals on Hg removal through forward osmosis (FO) and membrane distillation (MD) in order to establish a more effective water treatment process. The results of our laboratory experiment indicate that more than 97% of the rejection for each metal is achieved through the FO system, and this rejection is the highest among previous studies using membrane filtrations. Moreover, we examine the matrix effect of the coexisting Cd and Pb on the rejection of Hg in the FO system...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617281/comparison-of-culture-based-vital-stain-and-pma-qpcr-methods-for-the-quantitative-detection-of-viable-hookworm-ova
#12
P Gyawali, J P S Sidhu, W Ahmed, P Jagals, S Toze
Accurate quantitative measurement of viable hookworm ova from environmental samples is the key to controlling hookworm re-infections in the endemic regions. In this study, the accuracy of three quantitative detection methods [culture-based, vital stain and propidium monoazide-quantitative polymerase chain reaction (PMA-qPCR)] was evaluated by enumerating 1,000 ± 50 Ancylostoma caninum ova in the laboratory. The culture-based method was able to quantify an average of 397 ± 59 viable hookworm ova. Similarly, vital stain and PMA-qPCR methods quantified 644 ± 87 and 587 ± 91 viable ova, respectively...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617280/two-different-purification-systems-at-istanbul-tuzla-and-adana-kozan-their-characterizations
#13
Abdullah Yinanç
In most developed countries, wastewater treatment plants are presently utilizing efficient purification technology meeting the sufficiency requirements of quality and quantity. However, in developing countries, the number of wastewater treatment plants is limited. As a result, the establishment of a connection between the wastewater collection system and wastewater purification plants is increasingly becoming a top priority for researchers. The aim of this article is to analyze wastewater collection and purification systems and establish the links between these two processes...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617279/rotating-belt-sieves-for-primary-treatment-chemically-enhanced-primary-treatment-and-secondary-solids-separation
#14
B Rusten, S S Rathnaweera, E Rismyhr, A K Sahu, J Ntiako
Fine mesh rotating belt sieves (RBS) offer a very compact solution for removal of particles from wastewater. This paper shows examples from pilot-scale testing of primary treatment, chemically enhanced primary treatment (CEPT) and secondary solids separation of biofilm solids from moving bed biofilm reactors (MBBRs). Primary treatment using a 350 microns belt showed more than 40% removal of total suspended solids (TSS) and 30% removal of chemical oxygen demand (COD) at sieve rates as high as 160 m³/m²-h. Maximum sieve rate tested was 288 m³/m²-h and maximum particle load was 80 kg TSS/m²-h...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617278/performance-assessment-of-a-vertical-flow-constructed-wetland-treating-unsettled-combined-sewer-overflow
#15
T G Pálfy, M Gerodolle, R Gourdon, D Meyer, S Troesch, P Molle
The performance of a vertical flow constructed wetland for combined sewer overflow treatment (CSO CW) has been evaluated. The full-scale site has been monitored for 3 years for major pollutants and for two load events for a range of micropollutants (metals, metalloids and polycyclic aromatic hydrocarbons (PAHs)). Performance were predominantly high (97% for total suspended solids (TSS), 80% for chemical oxygen demand (COD), 72% for NH4-N), even if several loads were extremely voluminous, pushing the filter to its limits...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617277/promotion-of-partial-nitritation-anammox-process-by-improving-granule-proportion
#16
Jun Cheng, Liang Zhang, Yandong Yang, Shujun Zhang, Xiaoyu Han, Yongzhen Peng
For enhancing the partial nitritation-anammox (PN/A) process, the effects of granule fraction on system performance were investigated in this study. Two sequencing batch reactors (SBRs) were inoculated with PN/A biomass with a floc mass fraction of 53%. In SBR1, when the nitrogen removal rate (NRR) was stable, flocculent sludge was gradually discharged from the reactor using a screen, and the granule fraction was therefore increased. However, nitrogen removal was not improved and finally deteriorated due to the loss of nitritation activity...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617276/removal-of-potentially-toxic-elements-from-aqueous-solutions-and-industrial-wastewater-using-activated-carbon
#17
Muhammad Sajjad, Sardar Khan, Shams Ali Baig, Saduf Munir, Alia Naz, Sheikh Saeed Ahmad, Anwarzeb Khan
Water contamination with potentially toxic elements (PTEs) has become one of the key issues in recent years that threatens human health and ecological systems. The present study is aimed at removing PTEs like cadmium (Cd), chromium (Cr), copper (Cu) and lead (Pb) from aqueous solutions and industrial wastewater using activated carbon (AC) as an adsorbent through different batch and column experiments. Results demonstrated that the removal of PTEs from aqueous solutions was highly pH dependent, except for Cr, and the maximum removal (>78%) was recorded at pH 6...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617275/cost-comparison-of-full-scale-water-reclamation-technologies-with-an-emphasis-on-membrane-bioreactors
#18
Raquel Iglesias, Pedro Simón, Lucas Moragas, Augusto Arce, Ignasi Rodriguez-Roda
The paper assesses the costs of full-scale membrane bioreactors (MBRs). Capital expenditures (CAPEX) and operating expenses (OPEX) of Spanish MBR facilities have been verified and compared to activated sludge plants (CAS) using water reclamation treatment (both conventional and advanced). Spanish MBR facilities require a production of 0.6 to 1.2 kWh per m(3), while extended aeration (EA) and advanced reclamation treatment require 1.2 kWh per m(3). The energy represents around 40% of the OPEX in MBRs. In terms of CAPEX, the implementation costs of a CAS facility followed by conventional water reclamation treatment (physical-chemical + sand filtration + disinfection) ranged from 730 to 850 €...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617274/supporting-constructed-wetlands-in-p-removal-efficiency-from-surface-water
#19
Agnieszka Bus, Agnieszka Karczmarczyk
The research investigated the implementation of suspended reactive filters to support the phosphorus (P) removal efficiency of constructed wetlands (CWs). The reactive material (RM) used in this study was autoclaved aerated concrete (AAC). The laboratory experiment consists of four plastic boxes filled with the volume of 10 L of artificial P solution with three variants of RM mass to volume ratio: 1:1 (g:L), 5:1 (g:L), 10:1 (g:L), and the blind probe 0:1 (g:L) as a reference. AAC of different weights (10, 50 and 100 g) was wrapped in a filter bag, put into boxes, and suspended...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28617273/model-based-methodology-for-the-design-of-optimal-control-strategies-in-mbr-plants
#20
Juan Odriozola, Sergio Beltrán, Montse Dalmau, Luis Sancho, Joaquim Comas, Ignasi Rodríguez-Roda, Eduardo Ayesa
This paper proposes a model-based methodology that allows synthesising the most appropriate strategies for optimising the operation of wastewater treatment plants (WWTPs). The methodology is applied with the aim of maximising the nitrogen removal in membrane bioreactors (MBRs). The proposed procedure is based on a systematic approach composed of four steps. First, a sensitivity analysis of the input variables is carried out in order to obtain a first assessment of the potential for operational improvements...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
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