Browse Illinois Water Resources Center - Wastewater by Title

  • Wenzel, Harry G., Jr.; Voorhees, Michael L. (University of Illinois at Urbana-Champaign. Water Resources Center, 1981-08)
    This report describes an evaluation of the assumption commonly employed in drainage design that the return period of the rainfall used to design a system is the same as the peak flow produced by that rainfall. Specifically, ...

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  • Semmens, Michael J. (University of Illinois at Urbana-Champaign. Water Resources Center, 1976-08)
    Ammonium nitrogen may be readily removed from wastewaters by means of an ammonium selective ion exchanger, clinoptilolite. The major cost in this process is the cost of regenerating the exchanger in order that it may be ...

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  • Yen, Ben Chie; Cheng,Shiu-Tuang; Jun, Ryong-Iio; Voorhees, Michael L.; Wenzel, Harry G., Jr.; Mays, Larry W. (University of Illinois at Urbana-Champaign. Water Resources Center, 1984-05)
    ILSD models are sewer system models for least-cost optimal design of the entire system. ILSD-1 designs for a specified layout the size and slope of the sewers with or without detention storages with user supplied rainfall ...

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  • Sevuk, A. Suha; Yen, Ben Chie; Peterson, Gordon E. (University of Illinois at Urbana-Champaign. Water Resources Center, 1973-10)
    The Illinois Storm Sewer System Simulation Model is a mathematical model for sewer design and flow prediction utilizing the Saint Venant equations to route unsteady flows through tree-type sewer networks. An overlapping ...

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  • Geselbracht, James J.; Brill Jr., E. Downey; Pfeffer, John T. (University of Illinois at Urbana-Champaign. Water Resources Center, 1986-04)
    The use of a rule-based modeling technique for the formal consideration of poorly modeled issues in a water quality management problem is illustrated in the context of wastewater treatment plant design. Sludge bulking is ...

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  • Holley, E.R.; Klintworth, K.K. (University of Illinois at Urbana-Champaign. Water Resources Center, 1966-09)
    Some numerical methods are briefly described for determining vertical diffusion coefficients as a function of vertical coordinate in a turbulence vessel where there are no net velocities. It is planned to use this turbulence ...

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  • Brill Jr., E. Downey; Nakamura, Masahisa (University of Illinois at Urbana-Champaign. Water Resources Center, 1977-10)
    The Japanese government is undertaking a major program to provide additional sewage collection and treatment because of the severe water pollution that has resulted from rapid urbanization and industrialization. The program ...

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  • Rittmann, Bruce E.; Brunner, Craig W. (University of Illinois at Urbana-Champaign. Water Resources Center, 1982-10)
    When wastewater is discharged to small streams, the effluent quality normally obtained from a sewage treatment plant is often not good enough to prevent serious water-quality deterioration. Hence, enhanced removal of organic ...

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  • Nakamura, Masahisa; Brill Jr., E. Downey (University of Illinois at Urbana-Champaign. Water Resources Center, 1977-11)
    A mathematical method presented here deals with regionalization of wastewater systems, a complex public sector planning problem. The method proposed focuses on generating alternative physical plans efficiently and ...

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  • Tang, Chi-Chung; Brill Jr., E. Downey; Pfeffer, John T. (University of Illinois at Urbana-Champaign. Water Resources Center, 1984-11)
    A mathematical framework is developed for use in the design of a secondary wastewater treatment system. Mathematical models predicting the performance of various unit processes are used to construct a comprehensive system ...

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  • Yen, Ben Chie (University of Illinois at Urbana-Champaign. Water Resources Center, 1973-08)
    Increasing public concern on urban storm water quantity and quality problems demands a thorough review of the methodologies for flow prediction and design of urban storm drainage systems and development of improved ...

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  • Wang, Yi-Tin; Suidan, Makram T.; Rittmann, Bruce E. (University of Illinois at Urbana-Champaign. Water Resources Center, 1983-10)
    A completely mixed, expanded-bed, anaerobic granular activated carbon filter was operated on synthetic wastewaters in which acetate was the only organic carbon source. Steady-state performance was achieved for two influent ...

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  • Uber, James Gregory; Brill Jr., E. Downey; Pfeffer, John T. (University of Illinois at Urbana-Champaign. Water Resources Center, 1985-06)
    A method for sensitivity analysis in nonlinear programming is described and then illustrated using a least-cost model of a secondary wastewater treatment system. A sensitivity equation approach is used to calculate normalized ...

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  • Hinomoto, Hirohide (University of Illinois at Urbana-Champaign. Water Resources Center, 1971)

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  • Rossman, Lewis A.; Liebman, Jon C. (University of Illinois at Urbana-Champaign. Water Resources Center, 1974-07)
    A mathematical decision model is developed which determines how a group of waste dischargers should regionalize their treatment facilities and the amount of treatment each facility should provide so that the cost of achieving ...

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  • Brigham, Allison R. (University of Illinois at Urbana-Champaign. Water Resources Center, 1972-09)
    Physical, chemical, and biological parameters were monitored at five stations in the Asa Creek-Kaskaskia River system, Moultrie County, Illinois, from 12 September 1969 through 7 September 1970 to characterize these streams ...

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  • Kothandaraman, Veerasamy (University of Illinois at Urbana-Champaign. Water Resources Center, 1968-05)
    This work attempts to predict dissolved oxygen deficits in a stream with known initial conditions by taking into account the variations in deoxygenation and reaeration coefficients. A hypothetical stream situation is used ...

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  • Holley, E.R. (University of Illinois at Urbana-Champaign. Water Resources Center, 1969-07)
    Heat was used as a tracer to determine diffusion rates immediately below the free surface both in the "film" region and in the remainder of the water in a mixing vessel. The results tend to indicate that a diffusion model ...

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  • Yen, Ben Chie; Pansic, Nicholas (University of Illinois at Urbana-Champaign. Water Resources Center, 1980-03)
    Surcharge of a sewer is the situation in which the sewer entrance and exit are submerged and the pipe is flowing full and under pressure. In this report the hydraulics of the surcharged flow as well as the open-channel ...

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  • Pfeffer, John T.; Chang, Yueh (University of Illinois at Urbana-Champaign. Water Resources Center, 1977-07)
    A continuing operational problem encountered in the activated sludge system is sludge bulking. While there are several causative agents for this bulking, the filamentous bacterium Sphaerotilus is one of the more common. ...

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