Journal
CHEMOSPHERE
Volume 233, Issue -, Pages 110-119Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.05.205
Keywords
Tea residue; Reactive blue 19; Dye decolorization; Biological enhancement; Epigallocatechin gallate
Categories
Funding
- Fundamental Research Funds for the Central Universities of China [2232018G-11, 2232019D3-22]
- National Key Research and Development Program of China [2016YFC0400501]
- Graduate Student Innovation Fund of Donghua University of China [CUSF-DH-D-2019078]
- Anhui Provincial Natural Science Foundation of China [1808085QE176]
- scientific research program of Anhui Provincial Education Department of China [KJ2018A0444]
- Suzhou University Startup Foundation for Doctor of China [2016jb04]
- Chenguang Program - Shanghai Education Development Foundation [16CG40]
- Shanghai Municipal Education Commission of China [16CG40]
- Shanghai Leading Academic Discipline Project of China [B604]
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Conventional microbial treatments are challenged by new synthetic refractory dyes. In this work, tea residue was found serving as an effective activator to boost the decolorization performance of anthraquinone dye (reactive blue 19, RB19) by a new bacterial flora DDMY2. The unfermented West Lake Longjing tea residue showed the best enhancement performance. Seventeen main kinds of components in tea residue had been selected to take separate and orthogonal experiments on decolorization of RB19 by DDMY2. Results suggested epigallocatechin gallate (EGCG) in tea residue played important roles in boosting the treatment performance. Illumina MiSeq sequencing results confirmed that EGCG and tea residue pose similar impact on the change of DDMY2 community structure. Some functional bacterial genera unclassified_o_Pseudomonadales, Stenotrophomonas and Bordetella were enriched during the treatment of RB19 by EGCG and tea residue. These evidences suggested EGCG might be the key active component in tea residue that responsible for the enhancement effect on decolorization performance. These results revealed the activating mechanism of tea residue from the perspective of composition. (C) 2019 Elsevier Ltd. All rights reserved.
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