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Articles 1 - 15 of 15
Full-Text Articles in Water Resource Management
Dynamics Of Breakpoint Chlorination, Irvine Wei, J. Carrell Morris
Dynamics Of Breakpoint Chlorination, Irvine Wei, J. Carrell Morris
Irvine W. Wei
No abstract provided.
Advanced Chemical Oxidation And Toxicity Reduction Of 2,4,6-Trichlorophenol By Using Fenton's Reagent: Part Ii, Dechlorination Kinetics, Somnath Basu, Venkat Sreenivasan, Irvine W. Wei
Advanced Chemical Oxidation And Toxicity Reduction Of 2,4,6-Trichlorophenol By Using Fenton's Reagent: Part Ii, Dechlorination Kinetics, Somnath Basu, Venkat Sreenivasan, Irvine W. Wei
Irvine W. Wei
Laboratory investigation has shown that Fenton's Reagent is a very effective oxidant for 2,4,6-Trichlorophenol (TCP). The authors reported the first phase of this research, consisting of five different reactions of Fenton's Reagent on TCP, at the 1995 AIChE Summer National Meeting in Boston as Part I of this paper. The results demonstrated total removal of TCP, with almost complete release of aromatic ring bound chlorine atoms into chloride ions, significant reduction of TOC, and very importantly, significant toxicity reduction compared to the original substrate. These results suggested that Fenton's Reaction can be considered as a candidate process for treatment of …
Advanced Chemical Oxidation And Toxicity Reduction Of 2,4,6-Trichlorophenol By Using Fenton's Reagent: Part Iv, Reaction Mechanism And Kinetics, Somnath Basu, Irvine W. Wei
Advanced Chemical Oxidation And Toxicity Reduction Of 2,4,6-Trichlorophenol By Using Fenton's Reagent: Part Iv, Reaction Mechanism And Kinetics, Somnath Basu, Irvine W. Wei
Irvine W. Wei
No abstract provided.
Evaluation Of Chlorine Emission Potential At The New Deer Island Wastewater Treatment Plant, Somnath Basu, Kenneth Shilinsky, Irvine Wei
Evaluation Of Chlorine Emission Potential At The New Deer Island Wastewater Treatment Plant, Somnath Basu, Kenneth Shilinsky, Irvine Wei
Irvine W. Wei
The Massachusetts Water Resources Authority (MWRA) is currently constructing a 1,200 million gallon per day secondary wastewater treatment facility on Deer Island, in Boston Harbor. Chlorine, in the form of sodium hypochlorite solution, is purchased and barged to Deer Island for use in both effluent disinfection and odor scrubbing. The Process Engineering Department of Deer Island, as part of its on-going cost effectiveness program, is currently evaluating on-site generation of sodium hypochlorite. The technical analysis includes a thorough examination of the chemistry of production and storage, including potential losses to atmosphere. This paper presents an overview of that examination, defines …
Removal Of Arsenic From Groundwater At The Baird & Mcguire Superfund Site, Christopher D. Zevitas, Irvine W. Wei
Removal Of Arsenic From Groundwater At The Baird & Mcguire Superfund Site, Christopher D. Zevitas, Irvine W. Wei
Irvine W. Wei
No abstract provided.
Uv Disinfection Of Treated Wastewater Effluent: Influence Of Color, Reactivation And Regrowth Of Coliform Bacteria, Somnath Basu, Jack Page, Irvine Wei
Uv Disinfection Of Treated Wastewater Effluent: Influence Of Color, Reactivation And Regrowth Of Coliform Bacteria, Somnath Basu, Jack Page, Irvine Wei
Irvine W. Wei
Disinfection is a very important unit process to deactivate coliform bacteria in treated wastewater. However, regrowth potential of coliform bacteria raises human health and safety concerns associated with reuse of treated wastewater in various applications. Both post chlorination and post UV disinfection regrowth have been reported in the literature. In view of increasing use of recycled wastewater for reuse, it is necessary to address this phenomenon from both technical and regulatory standpoints. A case study of fecal coliform regrowth in a full scale operating plant is reported here. This is expected to aid in further understanding of the phenomenon and …
A Conceptual Continuous Process For The Treatment And Toxicity Reduction Of Wastewater Contaminated With 2,4,6-Trichlorophenol: Extended Abstract, Somnath Basu, Irvine W. Wei
A Conceptual Continuous Process For The Treatment And Toxicity Reduction Of Wastewater Contaminated With 2,4,6-Trichlorophenol: Extended Abstract, Somnath Basu, Irvine W. Wei
Irvine W. Wei
Fenton's Reagent is an aqueous solution of ferrous ions and hydrogen peroxide. Through laboratory experiments Fenton's Reagent has been shown to be an excellent treatment agent for the removal of organic contaminants dissolved in water. It carries out oxidative degradation of various organic substrates using the principle of advanced chemical oxidation. This is an excellent alternate route for the removal of hazardous and toxic chemicals, which are recalcitrant to biological treatment. The authors of this paper conducted an extensive laboratory investigation to study the degradation of 2,4,6- Trichlorophenol (TCP) using Fenton's Reagent, reported elsewhere. The results indicated an optimum H₂O₂:TCP …
Computer Simulation Of Lime-Soda Water Softening Process, J. C. Y. Chen, I. W. Wei
Computer Simulation Of Lime-Soda Water Softening Process, J. C. Y. Chen, I. W. Wei
Irvine W. Wei
No abstract provided.
Upflow Anaerobic Filter With Dual Media: A Novel Concept, K. Jain, I. Wei, A. Panchal, N. Varandani
Upflow Anaerobic Filter With Dual Media: A Novel Concept, K. Jain, I. Wei, A. Panchal, N. Varandani
Irvine W. Wei
To overcome two of the main problems intrinsic to upflow anaerobic filters using single media--clogging and biomass washout--a new strategy consisting of two different media is studied. The study is to evaluate the performance of Dual Media Upflow Anaerobic Filter (DM UAF), a novel wastewater treatment unit using synthetic waste as well as primary treated effluent of Common Effluent Treatment Plant (CETP), Vatva, India, operated by The Green Environment Services Co-Operative Society Ltd. and also to compare the performance of DM UAF with Single media UAF on a laboratory scale. Biokinetics of DM UAF was also determined. A 14.45 L …
Advanced Chemical Oxidation And Toxicity Reduction Of 2,4,6-Trichlorophenol By Using Fenton's Reagent: Part I, Kuang-Wei (Stone) Chen, Somnath Basu, Irvine W. Wei
Advanced Chemical Oxidation And Toxicity Reduction Of 2,4,6-Trichlorophenol By Using Fenton's Reagent: Part I, Kuang-Wei (Stone) Chen, Somnath Basu, Irvine W. Wei
Irvine W. Wei
The objective of this study is to exmnine the removal of a priority chlorinated aromatic pollutant, 2,4,6-Trichlorophenol (TCP), in aqueous solution by using Fenton's Reagent (a mixture of hydrogen peroxide and ferrous iron catalyst). Chlorinated phenols are priority pollutants, regulated by stringent discharge litnits. The presence of chlorine increases the toxicity of these phenolic compounds and decreases their biodegradability. Therefore, the processes of oxidation and dechlorination of chlorinated phenols by using Fenton's Reagent were employed in this study. Experiments were conducted in one-liter stirred batch reactors at 20°C. Three parallel reactors were used for reactions between 0.25 mM 2,4,6-TCP and …
An Assessment Of The Water Distribution System In The City Of Medford, Massachusetts, Yogesh Jitoo, Irvine Wei, Thomas R. Morgan, Donald Ouellette
An Assessment Of The Water Distribution System In The City Of Medford, Massachusetts, Yogesh Jitoo, Irvine Wei, Thomas R. Morgan, Donald Ouellette
Irvine W. Wei
The objective of this paper is to present the analysis of the water distribution system for the City of Medford, Massachusetts to identify areas of pressure deficiency. H₂OMAP Water Suite, modeling software, was used to assess the system, and using the calibrated hydraulic model of the water distribution system, the current available fire flows were compared to the required fire flows as determined by the Insurance Services Office (ISO) in 2002. Further, the influence of improvements made by the City to the distribution system from 2002 through 2004 to meet the required fire flows was evaluated. The model was also …
Chemistry Of Lime-Soda Softening Of Cooling Water, Li-Shiang Liang, David J. Goldstein, Irvine W. Wei
Chemistry Of Lime-Soda Softening Of Cooling Water, Li-Shiang Liang, David J. Goldstein, Irvine W. Wei
Irvine W. Wei
No abstract provided.
Pilot Study Of Greater Boston Drinking Water Quality Changes - Impacts Of Ozonation And Distribution System, Irvine W. Wei, Xin (Cindy) Huang, Windsor Sung
Pilot Study Of Greater Boston Drinking Water Quality Changes - Impacts Of Ozonation And Distribution System, Irvine W. Wei, Xin (Cindy) Huang, Windsor Sung
Irvine W. Wei
The Massachusetts Water Resources Authority (MWRA) provides drinking water to 2.2 million people in Greater Boston. To ensure good water quality without filtration, the MWRA is about to replace chlorination with ozonation as the primary disinfection at the new Walnut Hill Water Treatment Plant, scheduled to be on-line in 2005. The objective of this study was to understand the influence of ozonation on monochloramine decay and pH change in the MWRA system. The influence of the distribution system, which consists of old cast-iron pipes, on the ozonated water was also investigated. A pilot plant, including a simulated distribution system with …
Cyclic Heating To Inhibit Bacterial Growth In Activated Carbon Point-Of-Use Treatment Devices, Irwin Silverstein, Irvine W. Wei
Cyclic Heating To Inhibit Bacterial Growth In Activated Carbon Point-Of-Use Treatment Devices, Irwin Silverstein, Irvine W. Wei
Irvine W. Wei
The effectiveness of using heat treatment on a cyclic basis as a means of inhibiting bacterial growth in activated carbon point-of-use treatment devices was examined. Heat treated and non-heat treated devices were compared in a controlled experiment with respect to parameters such as standard plate count, total organic carbon, total residual chlorine and head loss. The results of the study indicated that cyclic heat treatment can inhibit bacterial growth on the surface of granular activated carbon without compromising total organic carbon and total residual chlorine removal efficiencies or accelerating head loss. Microbiological testing verified that the control device had become …
Advanced Chemical Oxidation Of 2,4,6-Trichlorophenol By Using Fenton's Reagent - Dechlorination And Toxicity Reduction, Kuang-Wei (Stone) Chen, Irvine W. Wei
Advanced Chemical Oxidation Of 2,4,6-Trichlorophenol By Using Fenton's Reagent - Dechlorination And Toxicity Reduction, Kuang-Wei (Stone) Chen, Irvine W. Wei
Irvine W. Wei
Chlorinated phenols are priority pollutants, regulated by stringent discharge limits. The presence of chlorine increases the toxicity of these phenolic compounds and decreases their biodegradability. This study is to examine the removal of a priority chlorinated aromatic pollutant, 2,4,6-trichlorophenol (TCP), in aqueous solution by using Fenton's Reagent (a mixture of hydrogen peroxide and fenous iron catalyst), in terms of dechlorination and toxicity reduction. Test results indicate that the higher the molar ratio of H₂O₂ to TCP, the faster the release of chloride from TCP. However, the chloride released in all runs eventually approach the same level of theoretical chloride concentration, …