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Full-Text Articles in Physical Sciences and Mathematics
Wastewater Treatment And Management At Oil Shale Plants, R. E. Hicks, R. F. Probstein, I. Wei, D. S. Farrier, J. Lotwala, T. E. Phillips
Wastewater Treatment And Management At Oil Shale Plants, R. E. Hicks, R. F. Probstein, I. Wei, D. S. Farrier, J. Lotwala, T. E. Phillips
Irvine W. Wei
Laboratory tests have shown that the major wastewater streams produced during oil shale retorting can in principle be treated to a quality suitable for reuse within the plant. The wastewater stream condensed from the retort gases, here called the gas condensate, contains primarily dissolved gases (NH3, CO2 and some H2S) and organics as contaminants. In batch stripping tests it was found that the organics, which may be present at concentrations of up to 5,000 mg/l measured as COD, are volatile and can be stripped along with the ammonia down to about 500 mg/l COD. Retort waters, or wastewater streams that …
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 …
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 …
Water Management In Oil Shale Production, R. Edwin Hicks, Ronald F. Probstein, Irvine Wei
Water Management In Oil Shale Production, R. Edwin Hicks, Ronald F. Probstein, Irvine Wei
Irvine W. Wei
Material balance calculations for several proposed oil shale processes have been made and show that water requirements vary from 2 to 5 times the product oil rate. Wastewater is produced at from one-third to 1.5 times the product oil rate and may be treated and used to offset the source water requirement. Water management schemes are used to show the degree of treatment required for each type of wastewater. Conceptual designs of treatment trains, based on laboratory investigations of reverse osmosis, resin adsorption, biological oxidation and steam stripping processes on actual wastewaters, show that water management costs range from 60¢ …