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Title: Genome-Resolved Meta-Omics Ties Microbial Dynamics to Process Performance in Biotechnology for Thiocyanate Degradation

Journal Article · · Environmental Science and Technology
ORCiD logo [1];  [2]; ORCiD logo [3];  [1];  [1];  [1];  [4];  [5];  [2];  [1]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of Cape Town (South Africa)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  4. USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Remediation of industrial wastewater is important for preventing environmental contamination and enabling water reuse. Biological treatment for one industrial contaminant, thiocyanate (SCN–), relies upon microbial hydrolysis, but this process is sensitive to high loadings. To examine the activity and stability of a microbial community over increasing SCN– loadings, we established and operated a continuous-flow bioreactor fed increasing loadings of SCN–. A second reactor was fed ammonium sulfate to mimic breakdown products of SCN–. Biomass was sampled from both reactors for metagenomics and metaproteomics, yielding a set of genomes for 144 bacteria and one rotifer that constituted the abundant community in both reactors. We analyzed the metabolic potential and temporal dynamics of these organisms across the increasing loadings. In the SCN– reactor, Thiobacillus strains capable of SCN– degradation were highly abundant, whereas the ammonium sulfate reactor contained nitrifiers and heterotrophs capable of nitrate reduction. Key organisms in the SCN– reactor expressed proteins involved in SCN– degradation, sulfur oxidation, carbon fixation, and nitrogen removal. Lower performance at higher loadings was linked to changes in microbial community composition. This work provides an example of how meta-omics can increase our understanding of industrial wastewater treatment and inform iterative process design and development.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725
OSTI ID:
1379767
Alternate ID(s):
OSTI ID: 1427690
Journal Information:
Environmental Science and Technology, Vol. 51, Issue 5; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Molecular insights into the activity and mechanism of cyanide hydratase enzyme associated with cyanide biodegradation by Serratia marcescens journal May 2018
Accurate and complete genomes from metagenomes journal March 2020
Genome-reconstruction for eukaryotes from complex natural microbial communities journal March 2018
Thiocyanate Degradation by a Highly Enriched Culture of the Neutrophilic Halophile Thiohalobacter sp. Strain FOKN1 from Activated Sludge and Genomic Insights into Thiocyanate Metabolism journal January 2019
Biodegradation of thiocyanate in groundwater by a native aquifer microbial consortium posted_content January 2018