Bacterial community structure transformed after thermophilically composting human waste in Haiti
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth and Environmental Sciences Area. Ecology Dept.; DOE/OSTI
- Univ. of California, Davis, CA (United States). Agricultural & Environmental Chemistry Graduate Group
- Sustainable Organic Integrated Livelihoods, Port-au-Prince (Haiti)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth and Environmental Sciences Area. Ecology Dept.
Recycling human waste for beneficial use has been practiced for millennia. Aerobic (thermophilic) composting of sewage sludge has been shown to reduce populations of opportunistically pathogenic bacteria and to inactivate both Ascaris eggs and culturable Escherichia coli in raw waste, but there is still a question about the fate of most fecal bacteria when raw material is composted directly. This study undertook a comprehensive microbial community analysis of composting material at various stages collected over 6 months at two composting facilities in Haiti. The fecal microbiota signal was monitored using a high-density DNA microarray (PhyloChip). Thermophilic composting altered the bacterial community structure of the starting material. Typical fecal bacteria classified in the following groups were present in at least half the starting material samples, yet were reduced below detection in finished compost: Prevotella and Erysipelotrichaceae (100% reduction of initial presence), Ruminococcaceae (98–99%), Lachnospiraceae (83–94%, primarily unclassified taxa remained), Escherichia and Shigella (100%). Opportunistic pathogens were reduced below the level of detection in the final product with the exception of Clostridium tetani, which could have survived in a spore state or been reintroduced late in the outdoor maturation process. Conversely, thermotolerant or thermophilic Actinomycetes and Firmicutes (e.g., Thermobifida, Bacillus, Geobacillus) typically found in compost increased substantially during the thermophilic stage. This community DNA-based assessment of the fate of human fecal microbiota during thermophilic composting will help optimize this process as a sanitation solution in areas where infrastructure and resources are limited.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1627825
- Journal Information:
- PLoS ONE, Journal Name: PLoS ONE Journal Issue: 6 Vol. 12; ISSN 1932-6203
- Publisher:
- Public Library of ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Biological and thermochemical conversion of human solid waste to soil amendments
|
journal | April 2019 |
Advanced biofilm analysis in streams receiving organic deicer runoff
|
journal | January 2020 |
Effect of Composting Under Semipermeable Film on the Sewage Sludge Virome
|
journal | April 2019 |
Precision public health to inhibit the contagion of disease and move toward a future in which microbes spread health
|
journal | February 2019 |
Realizing the Circular Economy for Sanitation: Assessing Enabling Conditions and Barriers to the Commercialization of Human Excreta Derived Fertilizer in Haiti and Kenya
|
journal | June 2019 |
Similar Records
Effect of seeding during thermophilic composting of sewage sludge
Emergence of nosocomial associated opportunistic pathogens in the gut microbiome after antibiotic treatment
Structural basis for the regulation of β-glucuronidase expression by human gut Enterobacteriaceae
Journal Article
·
Thu Feb 28 23:00:00 EST 1985
· Appl. Environ. Microbiol.; (United States)
·
OSTI ID:6469607
Emergence of nosocomial associated opportunistic pathogens in the gut microbiome after antibiotic treatment
Journal Article
·
Sun Feb 14 19:00:00 EST 2021
· Antimicrobial Resistance & Infection Control
·
OSTI ID:1817036
Structural basis for the regulation of β-glucuronidase expression by human gut Enterobacteriaceae
Journal Article
·
Wed Dec 20 19:00:00 EST 2017
· Proceedings of the National Academy of Sciences of the United States of America
·
OSTI ID:1462565