Jaeyoung Park

Iowa State University, Ames, Iowa, United States

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Publications (14)17.09 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Hydrogen sulphide (H2S) adsorption capacities on recycled rubber media, tyre-derived rubber particle (TDRP), and other rubber material (ORM) have been evaluated. As part of the research, densities, moisture contents, and surface properties of TDRP and ORM have been determined. The research team findings show that TDRP and ORM are more particulate in nature and not highly porous-like activated carbon. The characteristics of surface area, pore size, and moisture content support chemisorption on the macrosurface rather than physical adsorption in micropores. For example, moisture content is essential for H2S adsorption on ORM, and an increase in moisture content results in an increase in adsorption capacity.
    Environmental Technology 09/2014; 35(17-20):2500-5. · 1.61 Impact Factor
  • Jin Hwan Oh, Jaeyoung Park, Timothy G Ellis
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    ABSTRACT: The performance and operational stability of a pilot-scale static granular bed reactor (SGBR) for the treatment of dairy processing wastewater were investigated under a wide range of organic and hydraulic loading rates and temperature conditions. The SGBR achieved average chemical oxygen demand (COD), biological oxygen demand (BOD), and total suspended solids (TSS)-removal efficiencies higher than 90 % even at high loading rates up to 7.3 kg COD/m(3)/day, with an hydraulic retention time (HRT) of 9 h, and at low temperatures of 11 °C. The average methane yield of 0.26 L CH4/g CODremoved was possibly affected by a high fraction of particulate COD and operation at low temperatures. The COD mass balance indicated that soluble COD was responsible for most of the methane production. The reactor showed the capacity of the methanogens to maintain their activity and withstand organic and hydraulic shock loads.
    Bioprocess and Biosystems Engineering 08/2014; · 1.87 Impact Factor
  • Jin Hwan Oh, Jaeyoung Park, Timothy G Ellis
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    ABSTRACT: Performance of the laboratory-scale recycled rubber particles (RRP) biofilter was compared to a conventional gravel system and a peat biofilter for treatment of septic tank effluent. During the study, the RRP biofilter provided similar or better performance than other systems in terms of organic removal and hydraulic capacity. After the start-up period, RRP biofilter achieved removal efficiencies for BOD5, total suspended solids (TSS), ammonia nitrogen of 96%, 93%, and 90%, respectively, over the range of hydraulic loading rates of 57-204 L/m2/d. On the other hand, the peat biofilter failed hydraulically and the gravel system showed high TSS concentrations in the effluent. RRP provided high surface area and sufficient time for biological treatment. In addition, RRP was observed to provide ammonia adsorption capacity. The results showed that RRP has the potential to be used as substitutes for natural aggregate such as gravel in septic system drainfields. The RRP biofilter can be used as alternative septic systems for the sites where an existing septic system has failed or site conditions, such as high groundwater table or small lot size, are not suitable for the installation of conventional septic systems.
    Environmental Technology 03/2014; 35(5-8):637-44. · 1.61 Impact Factor
  • Xi Jiang, Jaeyoung Park, Timothy Ellis
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    ABSTRACT: Many of municipal wastewater treatment plants (WWTPs) are operated by biological process with their excellent performances. However, the early warning system in the influent line is required to avoid the process malfunction because the biological wastewater treatment system has serious drawback to toxic chemicals in the influent. In order to develop a new type of biosensor using anaerobic granules in an online device for rapid detection of toxic inhibitory to the biological process, a porous pot reactor and an anaerobic granule biosensor (AGB) were demonstrated as an upset early warning device (UEWD) in this study. In the first group of toxic loading tests, the prepared cupric chloride solutions were separately injected into both the porous pot and AGB systems at six different concentrations, and phenol solutions were used at three different concentrations in the second group of tests. The results showed the chemical oxygen demand (COD) and ammonia nitrogen (ammonia-N) removal efficiency from porous pot reactor decreased dramatically in response to the addition of Cu2+ and phenol with the variation of the oxidation-reduction potential (ORP) in AGB. The response of AGB system was 6 to 20 h in advance of porous pot reactor performance response, which suggests that the AGB could potentially be used as an online UEWD.
    Water Air and Soil Pollution 01/2014; 225(2). · 1.75 Impact Factor
  • Ning Wang, Jaeyoung Park, Timothy G Ellis
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    ABSTRACT: A commercial rubber waste product, fine rubber particle media (FRPM), was found to adsorb hydrogen sulfide (H2S) at 0.12mg H2S/g FRPM of adsorption capacity. Since FRPM seems to be an attractive alternative to treat H2S owing to its economic advantages as well as its physicochemical characteristics, several analyses were conducted to investigate fundamental information, surface properties, and breakthrough characteristics of FRPM as adsorbent. The physical properties of FRPM including composition and surface chemistry were investigated to compare its performance with commonly available commercial H2S adsorbents such as activated carbon and assess the possible adsorption mechanism. The specific surface area of FRPM was less than 1% of activated carbon. FRPM does not have enough surface area supporting a pure physical adsorption of H2S because it is particulate in nature with limited porosity. The adsorption of FRPM to remove H2S was complex mechanism and involved a combination of zinc compounds and carbon black.
    Journal of hazardous materials 07/2013; 260C:921-928. · 4.33 Impact Factor
  • Jaeyoung Park, Jin Hwan Oh, Timothy G Ellis
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    ABSTRACT: An on-site pilot-scale static granular bed reactor (SGBR) system was evaluated for treating wastewater from a slaughterhouse in Iowa. The study evaluated SGBR reactor suitability for slaughterhose wastewater having high particulate COD concentration (7.9 ± 4.3 g COD/L) at 0.3-1.4 m(3)/m(2)/day of the surface loading rates. 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. The average effluent TSS, VSS, COD, soluble COD, and BOD(5) concentrations were 84, 71, 301,197, and 87 mg/L, respectively. An effective backwash procedure was performed once every 7-14 days 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 to 12.76 kg/m(3)/day.
    Bioprocess and Biosystems Engineering 08/2011; 35(3):459-68. · 1.87 Impact Factor
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    ABSTRACT: The biofilter system containing tire-derived rubber particle (TDRP) filter media was utilized to treat the odorous gas contaminant, hydrogen sulfide, in consideration of the economic advantage of reusing discarded tire materials and the high potential of TDRP media for biofilm attachment. The pilot-scale system having 0.38m3 of bed volume operated with synthetic hydrogen sulfide gas on continuous basis from a range of 0.34 to 1.15m3/min. This bioreactor system achieved over 94% removal efficiency at 20–90ppm of inlet H2S concentration while operating in 20–67s of empty bed retention time, indicating that overall effective operation was performed at mass loading rates of H2S ranging from 19.6 to 28.5g H2S/(m3 h). It was apparent by the effectiveness of the system’s performance that this system had the capability to effectively remove hydrogen sulfide with high efficiency over a range of concentrations. A maximum elimination capacity was not found for the biofilter during this study, which tested loading rates between 0 and 30g H2S/(m3 h). KeywordsTire-derived rubber particle (TDRP)–Biofilter–Hydrogen sulfide–Pilot-scale scrubber
    Water Air and Soil Pollution 01/2011; 215(1):145-153. · 1.75 Impact Factor
  • Jaeyoung Park, Timothy.G Ellis
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    ABSTRACT: The biofilter system containing TDRP filter media was utilized to treat the odorous gas contaminant, hydrogen sulfide in consideration of the economic advantage of reusing discarded tire materials and the high potential of TDRP media for biofilm attachment. The pilot scale system having 13.4 ft3 of bed volume operated with synthetic hydrogen sulfide gas on a continuous basis over a range of 12 to 40.6 CFM. This system achieved over 94% removal efficiency at 20-90 ppm of inlet H2S concentration while operating in 20-67 seconds of EBRTs, indicating that overall effective operation was performed at mass loading rates of H2S ranging from 19.6 to 28.5 g H2S/ m3 /hour. It was apparent by the effectiveness of the system's performance that this system had the capability to effectively remove hydrogen sulfide.
    Proceedings of the Water Environment Federation. 12/2008;
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    ABSTRACT: 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.
    Proceedings of the Water Environment Federation. 12/2008;
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    ABSTRACT: 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.
    Proceedings of the Water Environment Federation. 12/2008;
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    Jaeyoung Park, Timothy G. Ellis, Mike Lally
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    ABSTRACT: Currently, on average, one tire is discarded in the U.S. for every man woman and child every year. While the reuse market for used tires has increased over the years to approximately 75%, there are still an estimated 2-3 billion used tires stockpiled in the U.S. Finding economical and sustainable end uses for this tire material is an ongoing challenge to environmental engineers and others. In this study, three different uses of tire rubber were evaluated as biofilm attachment media in bioreactors for wastewater treatment: in an aerobic biofilter, in anoxic bioreactor, and in a hybrid anaerobic static granular bed reactor (SGBR). Size distribution, chemical composition, scanning electron microscopy, and whole effluent toxicity analyses were performed. These tests demonstrated that the tire rubber media was non-toxic and provided good surface area for biofilm attachment. The trickling filter system using chunk rubber (average diameter of approximately 3 cm) achieved 79.6-90.1% COD removal efficiency at organic loading rates ranging from 0.12 kg COD/m3·d to 0.34 kg COD/m3·d. In the hybrid SGBR, anaerobic granular sludge was augmented with fine rubber particles (average particle diameter of approximately 0.2 mm) and achieved greater than 90% COD removal at hydraulic retention times of 48 to 20 h resulting in organic loading increases from 0.44 to 2.7 kg/m3·d. The anoxic TDRP filter system achieved nitrate-nitrogen removal efficiencies greater than 97% at influent concentrations ranging from 52 to 94 mg NO3-N/L. This research demonstrated the utility of TDRP media in multiple biofiltration applications.
    Proceedings of the Water Environment Federation. 12/2005;
  • Eyyup Debik, Jaeyoung Park, Timothy G. Ellis
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    ABSTRACT: 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.
    Proceedings of the Water Environment Federation. 12/2004;
  • Ning Wang, Jaeyoung Park, Timothy G. Ellis
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    ABSTRACT: The adsorption capacity of fine rubber particle media (FRPM) derived from discarded vehicle tires and the consumer wasted rubber sources was evaluated for hydrogen sulfide treatment. H2S breakthrough tests were performed at various zinc contents, temperatures, and packing quantities. High zinc concentrations increased the adsorption capacity of FRPM significantly. H2S removal by FRPM was optimized at a packing quantity of 75 % of the column volume, and the adsorption capacity increased with reactor temperature within the range of 20–85 °C. The regeneration of ZnCl2 solution was reliable for increasing regeneration capacity of the FRPM-adsorbed H2S. FRPM seems to be an attractive alternative of H2S adsorbents in terms of cost effectiveness compared to traditional materials.
    Journal of Material Cycles and Waste Management · 0.57 Impact Factor
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    ABSTRACT: Static granular bed reactor (SGBR) and upflow anaerobic sludge blanket (UASB) reactor were demonstrated at mesophilic condition for the treatment of pulp and paper mill wastewater. The hydraulic retention times (HRTs) were varied from 4 to 24 h following 29-day start-up period. The overall chemical oxygen demand (COD) removal efficiency of the SGBR was higher than the UASB during this study. At 4 h HRT, the COD removal was greater than 70 % for the SGBR and 60 % for the UASB. Biomass yield and volatile fatty acids concentration of SGBR were slightly less than UASB at organic loading rates ranging from 1.2 to 5.1 kg/m3/day. The results indicated that the SGBR system can be considered a viable alternative system for anaerobic treatment for pulp and paper wastewater.
    Water Air and Soil Pollution 224(5). · 1.75 Impact Factor