Recently added articles from Water Environment Research:
Peristaltic Pump Autosamplers for Solids Measurement in Stormwater Runoff
Feb 01, 2009; ... ABSTRACT: Regulatory agencies approve automatic samplers containing peristaltic pumps as a sample collection method for stormwater characterization and for treatment-device evaluation. Autosampler performance, as discussed in the limited available literature, can vary across the entire ...
Altered Carbon Flow by Polyphosphate-Accumulating Organisms During Enhanced Biological Phosphorus Removal
Feb 01, 2009; ... ABSTRACT: The effect of carbon source availability during enhanced biological phosphorus removal (EBPR) was evaluated. To assess the EBPR activity of polyphosphate-accumulating organisms (PAOs), PAO-enriched sludge from a laboratory-scale sequencing batch reactor and activated sludge ...
Predicting Influent Estradiol and Estrone Concentrations for Wastewater Treatment Facilities
Feb 01, 2009; ... ABSTRACT: An externally validated model was developed to predict influent concentrations of natural estrogens at municipal wastewater plants. The model kinetic constant for the first-order biotransformation of estradiol into estrone, k^sub E2^, was calculated as 0.030 hour^sup -1^ ...
Effective Removal of Cryptosporidium by a Novel Bioflocculant
Feb 01, 2009; ... ABSTRACT: Extracellular biopolymer produced from Klebsiella terrigena was found to have excellent flocculating ability over a wide range of colloid particles (0.5 to 25µ). The biopolymer was thermostable, with an optimum temperature for flocculation of 30°C. Analysis with Fourier ...
Arsenite Oxidation by Immobilized Cells of Alcaligenes faecalis Strain O1201 in a Fluidized-Bed Reactor
Feb 01, 2009; ... ABSTRACT: Arsenic(III) oxidation was evaluated in a continuous-flow fluidized-bed reactor (FBR) with Alcaligenes faecalis strain O1201 immobilized in gel beads. The FBR was operated under 300 mg/L citrate and a range of influent As(III) concentrations (75 to 3000 mg/L) at short hydraulic ...
Thank You to Reviewers
Jan 01, 2009; ... Council of Science Editors (CSE) in its "White Paper on Promoting Integrity in Scientific Journal Publications", published at http://www.councUscienceecUtors.org/editorial_rx^ describes peer review as "the principal mechanism by which the quality of research is judged". This white paper goes on ...
The Role of Bulking Agent in Pile Methane and Carbon Dioxide Concentration during Wastewater Sludge Windrow Composting
Jan 01, 2009; ... ABSTRACT: Wastewater sludge and wood chips were used as feedstock for the construction of two piles, Pile I ("PI") and Pile II ("PII"), at a ratio of 1:1 and 1:2 v/v, respectively. Each pile was originally 1.3-m high, 2.0-m wide, and approximately 9.0-m long. A mechanical turner was used ...
Improved Bioconversion of Volatile Fatty Acids from Waste Activated Sludge by Pretreatment
Jan 01, 2009; ... ABSTRACT: Batch tests were conducted to analyze the influence of various pretreatment methods including thermo-alkaline, thermo-acid, ultrasonic-alkaline, and ultrasonic-acid on the bioconversion of volatile fatty acids (VFAs) from waste activated sludge. Experimental results showed that ...
Partitioning and Fate of Particle-Associated E. coli in River Waters
Jan 01, 2009; ... ABSTRACT: Attachment of fecal bacteria to suspended matter in the water column has important implications for its fate in rivers. We examined the part of Escherichia coli (E. coli) associated with suspended matter in natural river water samples, using a combination of 5-µm filtration and ...
Kinetics of Carbaryl Degradation by Anodic Fenton Treatment in a Humic-Acid-Amended Artificial Soil Slurry
Jan 01, 2009; ... ABSTRACT: A Fenton-based indirect electrochemical method, anodic Fenton treatment (AFT), developed for destroying and detoxifying pesticides in the aqueous environment, was evaluated for the degradation of a widely used pesticide, carbaryl, in an artificial soil slurry. More than 90% of ...
Temporal and Spatial Variations of Copper, Cadmium, Lead, and Zinc in Ten Mile Creek in South Florida, USA
Jan 01, 2009; ... ABSTRACT: Lead (Pb), zinc (Zn), copper (Cu), and cadmium (Cd) often seriously deteriorate water quality. Spatial and temporal fluctuations of the metal concentrations in the Ten Mile Creek (Florida) (TMC) were monitored on a weekly basis at 7 sampling sites, from June 2005 to September ...
Dynamic Modeling of Sludge Compaction and Consolidation Processes in Wastewater Secondary Settling Tanks
Jan 01, 2009; ... ABSTRACT: The double exponential settling model is the widely accepted model for wastewater secondary settling tanks. However, this model does not estimate accurately solids concentrations in the settler underflow stream, mainly because sludge compression and consolidation processes are ...
Modeling Ozone Mass Transfer in Reclaimed Wastewater
Jan 01, 2009; ... ABSTRACT: Ozone mass transfer in reclaimed water was evaluated at pilot scale to determine mass-transfer characteristics and reaction kinetics and to assess the use of oxygen as a surrogate to measure this process. Tests were conducted in a 40-L/min pilot plant over a 3-year period ....
Bulk Organic Matter and Nitrogen Removal from Reclaimed Water During Groundwater Recharge by Enhanced Direct Injection Well
Jan 01, 2009; ... ABSTRACT: Water shortages lead to increasing attention to artificial groundwater recharge by reclaimed water. A new kind of approach, enhanced direct injection-well recharge (EnDir) consisting of short- and long-term soil treatment, is considered to be suitable for large cities in China ....
Visible-Light-Sensitized Dechlorination of Perchloroethylene
Jan 01, 2009; ... ABSTRACT: An aqueous reaction mixture containing perchloroethylene (PCE), a photosensitizer, and an electron donor was irradiated by visible lamps to facilitate a sunlight-sensitized dechlorination reaction. Various types of lamps, electron donors, and photosensitizers were examined, to ...
Occurrence of Ciprofloxacin-, Trimethoprim-Sulfamethoxazole-, and Vancomycin-Resistant Bacteria in a Municipal Wastewater Treatment Plant
Jan 01, 2009; ... ABSTRACT: The occurrence of antibiotic-resistant bacteria was evaluated in aqueous samples obtained from a municipal wastewater treatment plant. Samples collected from the influent, clarifier effluent, and disinfected effluent were assayed for fecal coliforms, E. coli, and enterococci ...
Kinetics of p-Nitrophenol Adsorption by Layered Double Oxides During Its Hydration
Jan 01, 2009; ... ABSTRACT: Kinetics of p-nitrophenol (PNP) adsorption onto layered double oxides (LDO) during its hydration into layered double hydroxides (LDH) was studied. Results indicate that the adsorption of PNP onto LDO is a spontaneous endothermic process. The adsorption isotherms correlate well ...
2008 Literature Review
Nov 01, 2008; ... For those of you who have not caught up on your September reading, this journal was honored to feature its 2008 literature review, thereby continuing a tradition that was begun in 1933. That first review, "Research in Sewage Chemistry and Sewage Treatment. A Critical Review of the Literature of ...
Simultaneous Treatment of Graywater and Waste Gas in a Biological Trickling Filter
Nov 01, 2008; ... ABSTRACT: Biological processors are typically used in liquid- and gasphase remediation as separately staged systems. This research presents a novel application of a biotrickling filter operated for simultaneous treatment of contaminants present in graywater and waste gas (ammonia and ...
Solid-Phase Extraction and Preconcentration of Copper in Mineral Waters with 4-(2-Pyridyl-Azo) Resorcinol-Loaded Amberlite XAD-7 and Flame Atomic Absorption Spectrometry
Nov 01, 2008; ... ABSTRACT: A simple, sensitive, accurate, and selective method for determination of ultratrace levels of copper is modified. The method is based on preconcentration of copper on the 4-(2-pyridyl-azo) resorcinol-loaded amberlite XAD-7 (non-ionic copoly[styrene-acrylic compound]) at pH 5.0 ...