Conference Proceedings and Presentations

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  • Publication
    Industrial wastewater treatment with the static granular bed reactor versus the UASB
    (Water Environment Federation, 2005) Evans, Eric Anthony ; Ellis, Timothy ; Civil, Construction and Environmental Engineering
    Performance of the static granular bed reactor (SGBR) was compared to the upflow anaerobic sludge blanket (UASB) reactor. A statistically designed study was performed to establish significance of differences between the two reactors operating at three different hydraulic retention times (HRTs); 8, 16, and 24 hours. The reactors treated a synthetic wastewater composed of sucrose and non-fat dry milk (NFDM). In the experiment-wise analysis, chemical oxygen demand (COD) removal was significantly higher for the SGBR. Specifically, the SGBR outperformed the UASB at an HRT of eight hours with a COD removal of 90.7% versus 77.5%. Specific COD removal was higher for the UASB ranging from 0.19 to 0.94 gCOD/(gVS·d) versus 0.11 to 0.34 gCOD/(gVS·d) for the SGBR.
  • Publication
    Anaerobic municipal wastewater treatment with the static granular bed reactor
    (Water Environment Federation, 2005) Evans, Eric Anthony ; Ellis, Timothy ; Civil, Construction and Environmental Engineering
    Anaerobic treatment of municipal wastewater was successfully performed with the Static Granular Bed Reactor (SGBR). Five-day, carbonaceous biochemical oxygen demand (CBOD5) and total suspended solids were reduced to less than 30 mg/L in the effluent at HRTs of 24 hours and above and at an HRT of eight hours. Suspended solids accumulated within the reactor on top of the granule bed, and were easily wasted from a valved port. Due to the limiting rate of hydrolysis, biodegradable suspended solids were not fully metabolized, and methane recovery of chemical oxygen demand (COD) removed by the reactor was incomplete.
  • Publication
    Leachate treatment using the static granular bed reactor
    (Water Environment Federation, 2005) Debik, Eyyup ; Park, Jaeyoung ; Ellis, Timothy ; Civil, Construction and Environmental Engineering
    Leachate treatment and disposal is the one of the biggest issues during solid waste management facilities. Leachate has very high strength regarding to pH, chemical oxygen demand, ammonia, color, odor and heavy metals. Anaerobic treatment is a preferred option to treat leachate due to its feasibility with high organic strength. In this study, a new anaerobic treatment system called the Static Granular Bed Reactor (SGBR), which was developed by Ellis and Mach at Iowa State University in the Department of Civil, Construction and Environmental Engineering (U.S. Patent #: 6,709,591), was tested for treating leachate characterizing high strengthened wastewater. COD removal efficiency of the SGBR was above 90% with organic loading rates as high as 15 kgCOD/m3·day. Gas production potential was around 0.36 L gas (STP)/CODr while methane potential was 0.26 L CH4 (STP)/CODr. From the study results, it was apparent that the SGBR could be effectively used as an alternative anaerobic treatment process for leachate.
  • Publication
    Static Granular Bed Reactor (SGBR) Treatment of Industrial Wastewater
    (Water Environment Federation, 2009) Park, Jaeyoung ; Oh, Jin Hwan ; Lally, Michael F. ; Hobson, Keith L. ; Ellis, Timothy ; Civil, Construction and Environmental Engineering
    The on-site pilot-scale Static Granular Bed Reactor (SGBR) was used to treat the dairy processing wastewater at the Tulare Industrial Wastewater Treatment Plant (IWTP). A pilot unit with approximately 1500 gallons of active volume was operated for 7 months on a continuous basis with a range of 12 to 48 hour HRT conditions at ambient temperature. Throughout the study, COD and BOD5 removal was consistently over 90% under a broad range of organic loading conditions ranging from 0.63 to 9.72 kg/m3/d. TSS removal was also greater than 80% on average. In terms of organic removal, the SGBR system was robust over the range of temperatures experienced (10 to 29°C). Periodic backwashing consistently provided maintenance of a constant solids inventory and prevented an increase in head loss in the reactor. Based on these results, the SGBR appears to be an excellent alternative for the required pretreatment system from the Tulare IWTP. Several benefits for IWTP could be provided by a full scale application of SGBR due to its simple design and operational advantages over conventional high rate anaerobic systems.
  • Publication
    On-site Pilot Demonstration of the Static Granular Bed Reactor (SGBR) for Treating Slaughterhouse Wastewater
    (Water Environment Federation, 2009) Park, Jaeyoung ; Lally, Michael F. ; Oh, Jin Hwan ; Ellis, Timothy ; Civil, Construction and Environmental Engineering
    An on-site pilot-scale SGBR system was evaluated for treating wastewater from a slaughterhouse in Iowa. The study evaluated wastewater suitability for treatment with the SGBR and compared the SGBR to other high-rate anaerobic systems. High organic removal efficiency (over 95% of TSS and VSS removal) was obtained due to the consistent treatability of SGBR system during operation at HRTs of 48, 36, 30, 24, and 20 h. An effective backwash procedure was performed to waste a portion of the accumulated solids in the system. This procedure limited the increase in hydraulic head loss and maintained the system stability. COD removal efficiencies greater than 95% were achieved at organic loading rates ranging from 0.77 kg/m3/d to 12.76 kg/m3/d. This performance was consistently better than other high-rate anaerobic systems treating slaughterhouse wastewater.