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Grace M. Nisola Eulsaeng Cho Jennica D. Orata Mark C.F.R. Redillas Danvir Mark C. Farnazo Enkhdul Tuuguu Wook Jin Chung 《Process Biochemistry》2009,44(2):161-167
A combined ammonia gas absorption and nitrification was conducted in a single bioscrubber. The reactor was consisted of a bubble column (gas absorption) and a packed bed (nitrification) which contained poly-urethane foams with immobilized nitrifying activated sludge. The entering gas and scrubbing liquid were contacted countercurrently. The bubble column elimination capacity (EC) was 26.74 g NH3/m3 h at >99% ammonia gas removal and effluent gas concentration lower than 2 ppmv. Without ammonium supplement, EC can reach 35.66 g NH3/m3 h which is equivalently the highest tolerable ammonia loading rate of 700 g N/m3 day (1650 mg N/L) at the packed bed. At this level, 593 g N/m3-day ammonia removal rate was achieved via nitrification, dominated by ammonia oxidation. Partial recycling (R/Q = 0.5) of scrubbing solution reduced the secondary wastewater volume by producing 233% more concentrated nitrified products. Hydraulic retention time (HRT) of 24 h was found optimal for both processes (gas absorption and nitrification). 相似文献
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Hydrogen sulfide degradation characteristics of Bordetella sp. Sulf-8 in a biotrickling filter 总被引:1,自引:0,他引:1
Grace M. Nisola Enkhdul Tuuguu Danvir Mark D. Farnazo Mideok Han Younghee Kim Eulsaeng Cho Wook-Jin Chung 《Bioprocess and biosystems engineering》2010,33(9):1131-1138
The applicability of Bordetella sp. Sulf-8 to degrade Hydrogen Sulfide (H2S) gas in a biotrickling system was investigated. The isolate is a heterotrophic gram-negative, catalase- and oxidase-positive,
rod-shaped bacterium which can metabolize thiosulfate or sulfide into sulfate. The mesophilic Bordetella sp. Sulf-8 can grow within a wide pH range using yeast as carbon source, with or without the presence of sulfur. In batch
experiments, kinetic constants such as maximum specific growth rate (μ
max = 0.12 1/h), saturation constant (K
S = 0.017 g/L), and specific sulfur removal rate (88 mg S/g cells h) were obtained. In biotrickling experiments removal efficiencies
were satisfactory, but the system performance was observed to be more influenced by empty bed residence time than by H2S feed gas concentration. Critical and maximum elimination capacities were 78.0 and 94.5 g H2S/m3 day, respectively. Macrokinetic analysis of the biotrickling system revealed maximum H2S removal rate V
max = 15.97 g S/kg media-day and half saturation constant K
S′ = 12.45 ppmv. 相似文献
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