Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 302, Issue -, Pages 232-240Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2015.09.063
Keywords
Propanethiol; Biodegradation; Metabolite; Waste gas; Continuous treatment
Categories
Funding
- National High Technology Research and Development Program of China [2012AA063102]
- National Natural Science Foundation of China [51178430, 51308502]
- Program for Changjiang Scholars and Innovative Research Team in University
- Public Projects of Zhejiang Province [2014C33029]
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Pseudomonas putida S-1 was isolated from activated sludge. This novel strain was capable of degrading malodorous 1-propanethiol (PT). PT degradation commenced with no lag phase by cells pre-grown in nutrition-rich media, such as Luria-Bertani (LB), and PT-contained mineral medium at specific growth rates of 0.10-0.19 h(-1); this phenomenon indicated the operability of a large-scale cell culture. A possible PT degradation pathway was proposed on the basis of the detected metabolites, including dipropyl disulfide, 3-hexanone, 2-hexanone, 3-hexanol, 2-hexanol, S-0, SO42-, and CO2. P. putida S-1 could degrade mixed pollutants containing PT, diethyl disulfide, isopropyl alcohol, and acetaldehyde, and LB-pre-cultured cells underwent diauxic growth. Waste gas contaminated with 200-400 mg/m(3) PT was continuously treated by P. putida S-1 pre-cultured in LB medium in a completely stirred tank reactor. The removal efficiencies exceeded 88% when PT stream was mixed with 200 mg/m(3) isopropanol; by contrast, the removal efficiencies decreased to 60% as the empty bed residence time was shortened from 40 s to 20 s. (C) 2015 Elsevier B.V. All rights reserved.
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