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Lignocellulosic biodegradation by microorganism is difficult as the complicated structure of lignocellulose and there are different views on the anaerobic degradation mechanism. In this paper, anaerobic degradation mechanism of lignocellulose is outlined. The research orientation has some preliminary discussions further more.
The concentration-time curve could be obtained through the biodegradation experiment of 1-chloronaphthalene and 2-chloronaphthalene at different concentration by Pseudomonas sp HY. And the influence of growth substance on the degradation was also investigated. The metabolite was detected by GC-MS(gas chromatography-mass spectrometer). The results show that after hydroxylation reactions, the chlorinated...
A new phenol-degrading bacterium with high biodegradation activity and high tolerance of phenol, strain B3, was isolated from the coking wastewater of Coking Plant of Shougang in Beijing. The physic-biochemical characteristics as well as 16SrDNA gene sequence analysis were applied to classify the bacteria and its characteristics of degrading phenol. The results showed that the strain B3 was identified...
Mutation breeding was carried out on Aspergillus nidulans. to obtain strains with high cellulase activity. One mutant strain, U6, with high cellulase activity was obtained through primary screening and secondary screening, which used Congo red medium to compare the hydrolyzed ring and liquid fermentation to compare the enzyme activity, respectively. The enzyme activity of the obtained mutant rose...
A strain of bacterium, Rhodopseudomonas palustris PSB-1D, which could degrade o-chlorophenol (2-CP), was isolated and screened from shallow sediment in downstream side of the sewage outfall of an insecticide factory. The strain PSB-1D could not utilize 2-CP as the sole carbon source and energy resource. However, it could degrade 2-CP in the presence of co metabolism substrates. Seven kinds of additional...
In order to improve the biodegradability of xanthate, the biodegradation process of butyl xanthate as the sole source of carbon and energy was compared to that with an external carbon source added. The experimental results showed that the degradation rate of xanthate was significantly increased in the co-metabolism process. The biodegradation rate of butyl xanthate was 65.2% after shaking culture...
A bacterial strain was obtained through the screening experiments of decomposition of phenol, which had high degradability for phenol and was named P-1. The gene sequence obtained from the DNA extraction and polymerase chain reaction (PCR) amplification was compared with NCBI Genbank of U.S.A., and the strain was preliminary identified to be Rhodococcus sp. The optimum growth conditions were pH 7...
The effect of nitrite loading rate, organic carbon category and loading rate was investigated on simultaneous removal of organic carbon, sulfide, nitrate and nitrite by the mixotrophic denitrification and desulfurization process. This simultaneous respiratory process could be explained in terms of the microbial diversity. The 50 mgC/(L·d) of glucose and 25 mgC/(L·d) of acetate sodium were suitable...
Bio-recognition devices have captured special attention because they combine biological specificity and selectivity with electronics to perform environmental and biomedical analysis. Lindane is a recalcitrant pesticide considered potential carcinogen that has caused serious pollution problems. The purpose of the present study is to evaluate Streptomyces sp. M7 ability to dechlorinate lindane in liquid...
Lots of dimethoate are applied annually in world with the remainder released to environment has brought terrible contamination. Microorganisms play an important role in the biodegradation of pesticide residues in nature. Two fungal strains with dimethoate degradation capability were isolated and named as F1 and F2 after gradual adaptation and enrichment from soil. The further tests were carried out...
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