Document Detail


Biotreatment of hydrogen sulfide- and ammonia-containing waste gases by fluidized bed bioreactor.
MedLine Citation:
PMID:  11256495     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Gas mixtures of H2S and NH3 are the focus of this study of research concerning gases generated from animal husbandry and treatments of anaerobic wastewater lagoons. A heterotrophic microflora (a mixture of Pseudomonas putida for H2S and Arthrobacter oxydans for NH3) was immobilized with Ca-alginate and packed into a fluidized bed reactor to simultaneously decompose H2S and NH3. This bioreactor was continuously supplied with H2S and NH3 separately or together at various ratios. The removal efficiency, removal rate, and metabolic product of the bioreactor were studied. The results showed that the efficiency remained above 95% when the inlet H2S concentration was below 30 ppm at 36 L/hr. Furthermore, the apparent maximum removal and the apparent half-saturation constant were 7.0 x 10(-8) g-S/cell/day and 76.2 ppm, respectively, in this study. The element sulfur as a main product prevented acidification of the biofilter, which maintained the stability of the operation. As for NH3, the greater than 90% removal rate was achieved as long as the inlet concentration was controlled below 100 ppm at a flow rate of 27 L/hr. In the NH3 inlet, the apparent maximum removal and the apparent half-saturation constant were 1.88 x 10(-6) g-N/cell/day and 30.5 ppm, respectively. Kinetic analysis showed that 60 ppm of NH3 significantly suppressed the H2S removal by Pseudomonas putida, but H2S in the range of 5-60 ppm did not affect NH3 removal by Arthrobacter oxydans. Results from bioaerosol analysis in the bioreactor suggest that the co-immobilized cell technique applied for gas removal creates less environmental impact.
Authors:
Y C Chung; C Huang; C H Liu; H Bai
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the Air & Waste Management Association (1995)     Volume:  51     ISSN:  1096-2247     ISO Abbreviation:  J Air Waste Manag Assoc     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-03-20     Completed Date:  2001-04-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9503111     Medline TA:  J Air Waste Manag Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  163-72     Citation Subset:  IM    
Affiliation:
Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan, Republic of China.
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MeSH Terms
Descriptor/Qualifier:
Ammonia / metabolism*
Animal Husbandry
Arthrobacter / physiology*
Bioreactors*
Environmental Pollution / prevention & control
Gases
Hydrogen Sulfide / metabolism*
Pseudomonas putida / physiology*
Volatilization
Waste Disposal, Fluid
Chemical
Reg. No./Substance:
0/Gases; 7664-41-7/Ammonia; 7783-06-4/Hydrogen Sulfide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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