Journal of Environmental Engineering and Science

Articles from Vol. 6, No. 1, January

An Evaluation of Autothermal Thermophilic Aerobic Digestion (ATAD) of Municipal Sludge in Ireland
Abstract: Autothermal thermophilic aerobic digestion (ATAD) is an exothermic process where sludge is subjected to temperatures greater than 55 [degrees]C and a hydraulic retention time of 6-15 days. Organic solids are degraded and the heat released...
Decontamination a L'echelle Pilote De Sols Pollues En Metaux Toxiques Par Des Procedes Miniers et Lixiviation Chimique
Resume: Des essais preindustriels ont permis de demontrer la faisabilite de la decontamination des sols par une filiere de traitement comprenant du tamisage, du tri gravimetrique par spirale et par hydrocyclone, suivi d'une dissolution chimique. Trente...
Determination of First Order Rate Constants for Wetlands Treating Livestock Wastewater in Cold Climates
Abstract: Four years of performance data from a free-water surface constructed wetland receiving dairy wastewater in Nova Scotia was used to compute first order reaction rate constants (K.) for several parameters including BO[D.sub.5], TP, TKN, N[H.sub.4.sup.+]-N,...
Laboratory Study on Potential Mechanisms for Treatment of Woodwaste Leachate in Surface Flow Constructed Wetlands
Abstract: Laboratory tests were conducted on volatilization, adsorption on silt loam, and on the biological treatability of woodwaste leachate. No significant volatilization was found despite the high concentration of volatile fatty acids. Tannin and...
Occurrence of N-Nitrosamines in Alberta Public Drinking-Water Distribution Systems
Abstract: Since the 1974 discovery of trihalomethanes as disinfection by-products (DBPs) in drinking water, the regulatory and public health focus has been primarily directed at halogenated compounds, even though it is well established that chlorination...
Optimization of Municipal Wastewater Biological Nutrient Removal Using ASM2d
Abstract: Activated sludge model No. 2d (ASM2d) was calibrated then used to determine optimal recycle rates and basin retention times, with respect to final N, soluble P (sP) or N plus sP concentrations for Modified Bardenpho (MB), Modified University...
Selection of Water Treatment Processes Using Bayesian Decision Network Analyses
Abstract: Decisions on selection between alternative water treatment sequences require numerous considerations, including treatment effectiveness and costs of the individual technologies, water quality guidelines, and the characteristics of the influent...
Simple Physical Treatment for the Reuse of Wastewater from Textile Industry in the Middle East
Abstract: In this work, different treatment methods for wastewater from textile washing operations in the Palestinian territories were studied. The goal of the treatment process was to enable the textile industry to reuse the wastewater in textile...
Testing and Application of a Two-Dimensional Hydrothermal Model for a Water Supply Reservoir: Implications of Sedimentation
Abstract: Validation of a two-dimensional hydrothermal stratification model for 14 years for Schoharie Reservoir, N.Y, an impoundment that experiences substantial drawdown, is documented. The model is demonstrated to perform well in simulating the...
Treatment Kinetics of Aircraft Deicing Fluid in an Anaerobic Baffled Reactor
Abstract: A four compartment anaerobic baffled reactor (ABR) operated with and without recycle treated aircraft deicing wastewater. Without recycle a minimum hydraulic retention time (HRT) of 27 h (organic loading rate, OLR, of 6.2 g x [L.sup.-1] x...
Trends in Drought Patterns of Turkey
Abstract: Trends in annual and seasonal drought patterns in Turkey were investigated on the basis of regionally averaged surface humidity index (SHI) series. For this purpose, two nonparametric approaches, Mann-Kendall test and Sen's T test, were used....
Ultraviolet Germicidal Irradiation Inactivation of Airborne Fungal Spores and Bacteria in Upper-Room Air and HVAC In-Duct Configurations
Abstract: The efficacy of ultraviolet germicidal irradiation (UVGI) for inactivating airborne fungal spores and bacterial vegetative cells was evaluated under three configurations--intrinsic, upper-room air, and in-duct. Correspondingly, experiments...