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ABSTRACT: A selection of actinomyces that could degrade imazethapyr was conducted to provide actinomyces source for bioremediation of soil contaminated by imazethapyr. A strain of actinomyces was isolated from the samples of soil where imazethapyr had been applied for a long-term by use of bottle enriched culture and named S181. The strain had strong ability to degrade imazethapyr and could grow using mazethapyr as the sole nitrogen. The strain was related and shared characteristics to genus Streptomyces omiyaensis according to the physiological and biochemical properties as well as 16S rRNA sequence analysis. The influencing factors (temperature, pH, concentration and inoculum) were studied with fungus growth mass and degradation ratio as indexes. The results showed that the optimal degradation ratio occurred at the condition of inoculation ratio of 3%, 200 mg x L(-1) imazethapyr, at 30 degrees C and pH 7.0. Under these conditions, 84% imazethapyr had been degraded by S181 in medium Gao 1 without nitrogen after 5 days.
Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.] 05/2011; 32(5):1518-23.
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ABSTRACT: Inoculating microbes (Meishang compound microbes, MS; Zhongjia fermentation microbes, ZJ) on municipal solid wastes composting which adopted industrialized technology was studied. The dynamic changes of low molecule weight organic acid and high molecule weight humic substance were discussed. The results show that inoculating microbes on municipal solid wastes composting could increase the content of organic acid at initial stage of composting, and decrease that at final stage. But humic substance and humic acid decline at the initial stage, then increase at the final stage of composting. The dynamic changes of organic acid and humification index indicate that inoculating microbes on municipal solid wastes can obviously increase the maturity of composting, and order as follow: MS+ ZJ>ZJ > MS>CK.
Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.] 03/2006; 27(2):376-80.
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ABSTRACT: Dissolved organic matter(DOM) of municipal solid waste (MSW) consists of minerals, water, ash and humic substances, and is known to enhance plant growth. In this study, inoculating microbes (ZJ, MS) were used in municipal solid wastes composting, and composting implemented a industrialized technology. During composting, dissolved organic matter was extracted from the compost and purified. The spectral characteristics of dissolved organic matter was determined by fluorescence emission, excitation, and synchronous spectroscopy. Fluorescence emission, excitation, and synchronous spectra characterized by different relative fluorescent intensities and peaks over time. Fluorescence spectra were similar to that of fulvic acid in sewage sludge, indicating the presence of dissolved organic matter with aromatic structures and a high degree of molecular polymerization. Compared with the controls with no microbial inoculation, the microbe-inoculated treatments exhibited the increase of aromatic polycondensation, in the following order: MS + ZJ > ZJ > MS > CK.
Journal of Environmental Sciences 01/2005; 17(6):953-6. · 1.66 Impact Factor
