Browsing by Author "Lin, Yueh-Hsien"

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Biofiltration of trimethylamine, dimethylamine, and methylamine by immobilized Paracoccus sp CP2 and Arthrobacter sp CP1
(2008-05-01)
Ho, Kuo-Ling
;
Chung, Ying-Chien
;
Lin, Yueh-Hsien
;
Tseng, Ching-Ping
;
生物科技學系
A biofilter using granular activated carbon with immobilized Paracoccus sp. CP2 was applied to the elimination of 10-250 ppm of trimethylamine (TMA), dimethylamine (DMA), and methylamine (MA). The results indicated that the system effectively treated MA (>93%), DMA (>90%), and TMA (>85%) under high loading conditions, and the maximum degradation rates were 1.4, 1.2, and 0.9 g-N kg(-1) GAC d(-1). Among the three different amines treated, TMA was the most difficult to degrade and resulted in ammonia accumulation. Further study on TMA removal showed that the optimal pH was near neutral (6.0-8.0). The supply of high glucose (>0.1%) inhibited TMA removal, maybe due to substrate competition. However, complete TMA degradation was achieved under the co-immobilization of Paracoccus sp. CP2 and Arthrobacter sp. CP1 (similar to 96%). Metabolite analysis results demonstrated that the metabolite NH(4)(+) concentrations decreased by a relatively small 27% while the metabolite NO(2)(-) apparently increased by heterotrophic nitrification of Arthrobacter sp. CP1 in the co-immobilization biofilter. (C) 2008 Elsevier Ltd. All rights reserved.
Large-scale modular biofiltration system for effective odor removal in a composting facility
(2013-09-19)
Lin, Yueh-Hsien
;
Chen, Yu-Pei
;
Ho, Kuo-Ling
;
Lee, Tsung-Yih
;
Tseng, Ching-Ping
Several different foul odors such as nitrogen-containing groups, sulfur-containing groups, and short-chain fatty-acids commonly emitted from composting facilities. In this study, an experimental laboratory-scale bioreactor was scaled up to build a large-scale modular biofiltration system that can process 34m(3)min(-1)waste gases. This modular reactor system was proven effective in eliminating odors, with a 97% removal efficiency for 96ppm ammonia, a 98% removal efficiency for 220ppm amines, and a 100% removal efficiency of other odorous substances. The results of operational parameters indicate that this modular biofiltration system offers long-term operational stability. Specifically, a low pressure drop (<45 mmH(2)O m(-1)) was observed, indicating that the packing carrier in bioreactor units does not require frequent replacement. Thus, this modular biofiltration system can be used in field applications to eliminate various odors with compact working volume.
Microbial populations analysis and field application of biofilter for the removal of volatile-sulfur compounds from swine wastewater treatment system
(2008-04-01)
Ho, Kuo-Ling
;
Chung, Ying-Chien
;
Lin, Yueh-Hsien
;
Tseng, Ching-Ping
;
生物科技學系
A biofilter packed with granular activated carbon (GAC) was applied to eliminate volatile-sulfur compounds (VSC) emitted from solid-liquid separation tank in swine wastewater treatment system. Hydrogen sulfide, methanethiol, dimethyl disulfide, and dimethyl sulfide were effectively reduced to 96-100% at gas residence times of 13-30 s. Elemental sulfur and sulfate are their primary oxidation metabolites. Regarding odor, an average of 86% reduction was achieved at short residence time (13 s). In addition, bioaerosol emissions could also be effectively reduced by 90% with the biofilter. Advantages of the system include low moisture demand, low pressure drop, and high biofilm stability. Further characterization of bacterial populations of the activated carbon samples using the fluorescent in situ hybridization (FISH) technique revealed that Pseudomonas sp. remained the predominant community (56-70%) after long-term evaluation of 415 days. (c) 2007 Published by Elsevier B.V.