AI Article Synopsis
- Scientists studied tiny living things (microbes) in a special tank (bioreactor) that produces a material called polyhydroxyalkanoates (PHAs) from leftover food and sludge.
- They found that the microbes changed a lot depending on what food they were given, and they worked better in teams to produce PHAs.
- The researchers also discovered new types of microbes that can make PHAs from garbage, helping us understand more about how mixed-culture systems work to recycle waste.
Article Abstract
The microbial community of a sequencing batch reactor operated under feast and famine conditions for production of polyhydroxyalkanoates (PHAs) was characterized through high-throughput sequencing and metagenomic analysis. The fermented food waste and chemically-enhanced primary sludge was fed in this bioreactor. After acclimation, the PHA yield achieved as high as 0.60-0.69 g COD/g COD. The complete changes of microbial community structure were found during shifts of feedstock. A synthesis of SCL/MCL-PHAs pathway was established for PHA-producing bioreactor in this mixed-culture system. The structure-performance relationship of PHA-producing microbial community and feedstock composition was investigated. The results showed that microbial community tends to be decentralized and prefer team work for PHA synthesis to consume the multiple substrates and digest inevitable non-VFA contents in fermented liquor. This study also discovered unreported potential PHA producers (e.g., genera Tabrizicola, Nannocystis, Ga0077539, Ga0077559, JOSHI-001, SNC69-320 and UBA2334) subsisting on municipal organic wastes and expands the current knowledge about mixed-culture system that the PHA synthesis pathway is widely existed in activated sludge.
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| http://dx.doi.org/10.1016/j.watres.2023.120512 | DOI Listing |
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