Journal of Environmental Engineering: Recent submissions
Now showing items 901-920 of 6477
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Design and Evaluation of a Novel Light-Emitting Diode Photocatalytic Reactor for Water Treatment
(American Society of Civil Engineers, 2018)In this paper, an ultraviolet light emitting diode–based immobilized photocatalytic reactor was designed, fabricated, and tested for water treatment. The performance of the reactor was evaluated by testing phenoxy pesticides ... -
Effect of Flow Rate Increase on the Performance of a Pilot-Scale Biological Nutrient Removal Reactor
(American Society of Civil Engineers, 2018)Nutrient removal in two identical pilot-scale reactors is assessed at influent flow rates of 3, 45, and 6 L/min. The bacteria community structure of nitrifiers and denitrifiers and the protein:polysaccharide ratio (PN/PS) ... -
Treatment of Saline Wastewater Containing a High Concentration of Salt Using Marine Bacteria and Aerobic Granule Sludge
(American Society of Civil Engineers, 2018)This study develops an ecofriendly and inexpensive biological treatment for high-salinity wastewater. The marine bacteria Bacillus sp. KGN1 and Vibrio sp. KGP1 show removal efficiencies of 75.3 and 65.4% for chemical oxygen ... -
Biodegradation of Environmentally Hazardous Azo Dyes and Aromatic Amines Using Klebsiella pneumoniae
(American Society of Civil Engineers, 2018)A facultative bacterium was isolated from the sludge of a local dyeing industry for bioremediation of wastewater containing azo dyes. The identified Klebsiella pneumoniae by 16S ribosomal DNA (rDNA) sequence analysis was ... -
Comparison of Degradation Efficacy and Bacterial Diversity between the A/O and O1/A/O2 Processes for Coking Wastewater Treatment
(American Society of Civil Engineers, 2018)To evaluate two practical coking wastewater treatment systems, the removal efficacy of major pollutants was compared and bacterial profiles were analyzed using high-throughput sequencing. The A/O (anoxic/oxic) process ... -
Preparation and Application of Aluminum-Carbon Microelectrolysis Materials
(American Society of Civil Engineers, 2018)The production of dyes is a major source of industrial wastewater, so it is important to develop efficient ways of treating this water. In this paper, the authors describe the use of a continuous aluminum-carbon microelectrolysis ... -
Promising Enhancement in the Removal of Uranium Ions by Surface-Modified Activated Carbons: Kinetic and Equilibrium Studies
(American Society of Civil Engineers, 2018)Two activated carbons (ac) were prepared by achieving nitric acid oxidation (ox-ac) and iron chloride impregnation (Fe-ac) in order to remove uranium (VI) ions from aqueous solutions. The porosity of the adsorbents was ... -
Efficient Recycling of Copper from Waste-Printed Circuit Boards via Suspension Electrolysis Using Response Surface Methodology
(American Society of Civil Engineers, 2018)Recycling of waste printed circuit boards (WPCBs) is an important subject not only for the protection of the environment, but also for the recovery of valuable materials, especially copper. In this paper, an effective and ... -
Biopolymer Beads for Aqueous Phosphate Removal: Possible Applications in Eutrophic Lakes
(American Society of Civil Engineers, 2018)Novel iron (Fe) cross-linked alginate (FCA) beads were used for phosphate removal from synthetic water, lake water, and wastewater. Batch experiments were conducted with the beads (.118 g dry weight) using three ... -
Pneumatically Agitated High-Density Polyethylene Mesh–Based Bioreactor Developed for Wastewater Treatment
(American Society of Civil Engineers, 2018)The use of woven and nonwoven fibers and meshes in membrane bioreactors (MBRs) has enhanced the study of the development of dynamic membranes, which aid to a large extent in overcoming the traditional problem of fouling ... -
Recovery of Zn from Unsorted Spent Batteries Using Solvent Extraction and Electrodeposition
(American Society of Civil Engineers, 2018)This study focused on the selective recovery of zinc (Zn) from a leaching solution emerging from a sulfuric acid leaching process applied to unsorted spent batteries. Precipitation and solvent extraction were investigated. ... -
Synthesis of Nano-Fe0/PEI Composite and Its Reduction and Chelation Mechanisms for Cr(VI) from Aqueous Solution
(American Society of Civil Engineers, 2018)In this paper, a nano-Fe/polyethyleneimine (PEI) composite was synthesized via nano-Fe and PEI cross-linked by glutaraldehyde. The removal rate of Cr(VI) by nano-Fe/PEI composite was investigated and compared with that of ... -
Optimization of 4-Nitrophenol Degradation by an Isolated Bacterium Anthrobacter sp. and the Novel Biodegradation Pathways under Nutrition Deficient Conditions
(American Society of Civil Engineers, 2018)To systematically understand the effects of the culturing properties and biodegradation reactions on 4-nitrophenol (PNP)-degrading microorganisms, the bacterium YUP-3 was isolated from soil samples with no PNP-pollution ... -
Air Flow Modeling in a Prototype Sanitary Sewer System
(American Society of Civil Engineers, 2018)Modeling air movement in sewer systems is important because of its importance in addressing sewer odor issues and pipe corrosion. In this study, a steady-state model was developed for simulating the air pressure and movement ... -
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(American Society of Civil Engineers, 2018)This study investigates the effect of multiwalled carbon nanotubes (MWCNTs) on the performance of polyethersulfone membranes in cerium ion removal from aqueous solution. Neat polyethersulfone (PES) membrane and mixed-matrix ... -
Effects of Thermal Pretreatment and Trace Metal Supplementation on High-Rate Thermophilic Anaerobic Digestion of Municipal Sludge
(American Society of Civil Engineers, 2018)This study involves high-rate thermophilic anaerobic digestion of sewage sludge at 1 days hydraulic retention time by using thermal pretreatment (17°C and 1 h) of the waste-activated sludge portion in influent ... -
Analytical Model for Degradable Organic Contaminant Transport through a GMB/GCL/AL System
(American Society of Civil Engineers, 2018)An analytical model for degradable organic contaminant transport in a triple liner consisting of a geomembrane (GMB), a geosynthetic clay liner (GCL), and an attenuation layer (AL) was developed. Both advective transport ... -
Flat Sheet Membrane Sequencing Batch Bioreactor for the Removal of Coliforms and Heavy Metals from Stabilized Composting Leachate
(American Society of Civil Engineers, 2018)Treatment process selection for compost leachate is required to carry out a pilot study because of the variability and complexity of this liquid’s composition. The main objective of the present study is to evaluate the ... -
Arsenic(V) Removal Using Activated Alumina: Kinetics and Modeling by Response Surface
(American Society of Civil Engineers, 2018)Arsenic(V) removal using activated alumina (AA) was carried out in batch mode and was modeled using response surface method. The Doehlert design of experiment (DOE) was used to model the experimental data, and the Doehlert ... -
Effects of Drop Structures and Pump Station on Sewer Air Pressure and Hydrogen Sulfide: Field Investigation
(American Society of Civil Engineers, 2018)Understanding hydrogen sulfide (H2S) emission into sewer air space and the rate of ventilation to the atmosphere is important in preventing/mitigating odor and corrosion problems in sewer systems. This study presents the ...