Journal of Environmental Engineering: Recent submissions
Now showing items 1061-1080 of 6477
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Microbial Communities on the Submerged Membranes in Full-Scale Membrane Bioreactors Treating Municipal Wastewater
(American Society of Civil Engineers, 2018)This study used 16S rRNA gene-based terminal-restriction fragment length polymorphism (T-RFLP) analysis to investigate full-scale membrane bioreactors (MBRs), which mainly treat domestic wastewater, with specific examination ... -
Climate Change: Implications for Ecotoxicological Environmental Impact Assessment
(American Society of Civil Engineers, 2017)As a consequence of increasing atmospheric CO2 and its subsequent sequestration, the oceans are undergoing changes that have not been seen for millennia, including temperature increases, ocean acidification, and localized ... -
Dissemination of Extended-Spectrum Beta-Lactamase–Producing Enterobacteriaceae in an Urban Wastewater Treatment Plant and Their Emission to a River
(American Society of Civil Engineers, 2018)Several studies have reported that wastewater treatment plants may facilitate the occurrence of resistant bacteria in effluents, creating a growing concern about their impact on animal and human health. For this study, 254 ... -
Preparation and Evaluation of Monetite as a High-Capacity Adsorbent for Fluoride Removal from Drinking Water
(American Society of Civil Engineers, 2018)In an effort to further understand the fourfold higher fluoride removal capacity of chemically activated cow bone (CAB) previously reported compared to bone char, fundamental properties of CAB were evaluated in this study. ... -
Competitive Sorption of Metallic Species under Different pH in a Residual Clayey Soil
(American Society of Civil Engineers, 2017)Soil contamination by toxic metals is a major environmental issue, mainly due to inadequate methods of waste disposal and accidental spills. Studies on fate and transport of contaminants help prevent the spread of pollutants ... -
Forward Osmosis: Mass Transmission Coefficient–Based Models for Evaluation of Concentration Polarization under Different Conditions
(American Society of Civil Engineers, 2018)In the past, forward osmosis (FO) models were developed to evaluate the effects of concentration polarization (CP), including external CP (ECP) and internal CP (ICP), on FO performance. However, these models are not clear ... -
Effect of Artificial Circulation on the Removal Kinetics of Cyanobacteria in a Hypereutrophic Shallow Lake
(American Society of Civil Engineers, 2017)This study consisted of two parts. First, pre-aeration tests were conducted to assess the space-time variability of water quality in a shallow lake. Chlorophyll-a concentration and cyanobacteria cell density varied from ... -
Assessing Alternative Media for Ballasted Flocculation
(American Society of Civil Engineers, 2017)Most current commercial applications of ballasted flocculation use silica sand to increase floc size and density. Other ballast media with different specific gravity may offer advantages such as increased applicable ... -
Monitoring Methods and Designs for Evaluating Bioretention Performance
(American Society of Civil Engineers, 2017)Roadside bioretention systems, also known as green streets are becoming increasingly popular, and have widespread potential to reduce pollutant loads coming from road runoff. However, the installation of these systems is ... -
Mill Scale–Derived Magnetite Particles: Effective Adsorbent for the Removal of Phosphate in Aqueous Solutions
(American Society of Civil Engineers, 2017)Mill scale, an iron waste, was used to synthesize magnetite particles for the adsorption of phosphate from an aqueous solution. Several techniques were used to characterize the adsorbents. Mill scale–derived magnetite ... -
Early Warning Indicators and Microbial Mechanisms for Process Failure due to Organic Overloading in Food Waste Digesters
(American Society of Civil Engineers, 2017)This paper aimed to evaluate the process stability and microbial community structure during anaerobic digestion of food waste. Organic loading rate (OLR) disturbances were introduced into a mesophilic anaerobic digester ... -
Optimal Reverse Osmosis Network Configuration for the Rejection of Dimethylphenol from Wastewater
(American Society of Civil Engineers, 2018)Reverse osmosis (RO) has long been recognized as an efficient separation method for treating and removing harmful pollutants such as dimethylphenol in wastewater treatment. This paper studies the effects of a RO network ... -
Optimization of the Acid Stage of a Two-Stage Anaerobic Digestion Process to Treat Urban Wastewater Sludge
(American Society of Civil Engineers, 2017)The efficiency of a two-stage mesophilic anaerobic sludge digestion process was studied in comparison with a conventional process to treat urban sludge in relation to the hydraulic retention time (HRT) of the acid stage. ... -
Application of Microwave Oxidation Process for Sewage Sludge Treatment in a Continuous-Flow System
(American Society of Civil Engineers, 2017)A pilot-scale continuous-flow 915-MHz microwave enhanced advanced oxidation (MW/H2O2-AOP) treatment system was specifically designed and used for the treatment of sewage sludge. The focus of this study was to examine the ... -
Design Charts for Contaminant Transport through Slurry Trench Cutoff Walls
(American Society of Civil Engineers, 2017)Slurry trench cutoff walls with low-permeability backfill material, such as soil-bentonite and slag-cement-bentonite, are used widely for containment of subsurface pollution. In the design of slurry walls the potential ... -
Aggregation and Fouling Impacts in Determining Organic and Clay Removal by Electropositive Filtration
(American Society of Civil Engineers, 2017)Electropositive filtration (EPF) uses a macroporous filter media with a strong positive charge to achieve high separation factors for substances many times smaller than its nominal pore size; however, the variables that ... -
Wastewater Effect on the Deposition of Cohesive Sediment
(American Society of Civil Engineers, 2018)In this study, the characteristics of sediment deposition with three levels of wastewater, different shear stress, and initial sediment concentration were investigated in an annular flume. Sediment used for experiments was ... -
Characterization and Land Application of Hydrodemolition and Diamond Grinding Slurries
(American Society of Civil Engineers, 2017)Hydrodemolition and grinding of highway surfaces create large volumes of a water and concrete slurry that must be safely disposed of or reused. This project evaluated the effect of applying the slurry as a liming agent to ... -
Using MACBETH Multicriteria Technique for GIS-Based Landfill Suitability Analysis
(American Society of Civil Engineers, 2016)Regarding the inability to fulfill regional landfill demands, the inefficiency of municipal solid waste management systems due to shortages of suitable and efficient infrastructures remains a crucial social issue. In ... -
Optimization of Nitrate Removal Efficiency and Energy Consumption Using a Batch Monopolar Electrocoagulation: Prediction by RSM Method
(American Society of Civil Engineers, 2017)The response surface method (RSM) was used to find out the best conditions for the nitrate removal by electrocoagulation (EC) process with aluminum electrodes. The independent variables were initial nitrate concentration, ...