Microbial transitions and degradation pathways driven by butyrate concentration in mesophilic and thermophilic anaerobic digestion under low hydrogen partial pressure.

Butyrate accumulation significantly affects the efficiency and stability of anaerobic digestion, while its specific impact on methane yield and butyrate degradation remains unclear. This study investigated how butyrate concentrations (2.0, 5.

Quest for Nitrous Oxide-reducing Bacteria Present in an Anammox Biofilm Fed with Nitrous Oxide.

NO-reducing bacteria have been examined and harnessed to develop technologies that reduce the emission of NO, a greenhouse gas produced by biological nitrogen removal. Recent investigations using omics and physiological activity approaches have revealed the ecophysiologies of these bacteria during nitrogen removal. Nevertheless, their involvement in‍ ‍anammox processes remain unclear.

Complete genome sequence of strain SH125, a non-denitrifying nitrous oxide-reducing bacterium isolated from anammox biomass.

Here, we report a genome sequence of strain SH125 isolated from an anammox reactor. This facultative anaerobic strain possesses the clade I-type nitrous oxide (NO) reductase gene, devoid of nitrite- and nitric oxide reductase genes. Deciphering the genome will help explore NO reducers instrumental in NO mitigation.

Complete genome sequence of D49 harboring genes for ectoine synthesis.

A complete genome sequence of D49 in the class was isolated from activated sludge treating landfill leachate. The genome encodes the functional genes for the biosynthesis of ectoine (), a compatible solute for cosmetics. Deciphering the genome helps pave the way for ectoine production by the isolate.

Microaerophilic Activated Sludge System for Ammonia Retention toward Recovery from High-Strength Nitrogenous Wastewater: Performance and Microbial Communities.

A transition to ammonia recovery from wastewater has started; however, a technology for sustainable nitrogen retention in the form of ammonia and organic carbon removal is still in development. This study validated a microaerophilic activated sludge (MAS) system to efficiently retain ammonia from high-strength nitrogenous wastewater. The MAS is based on conventional activated sludge (CAS) with aerobic and settling compartments.

Metagenomic Insights Into Functional and Taxonomic Compositions of an Activated Sludge Microbial Community Treating Leachate of a Completed Landfill: A Pathway-Based Analysis.

Upcycling wastes into valuable products by mixed microbial communities has recently received considerable attention. Sustainable production of high-value substances from one-carbon (C1) compounds, e.g.

Identification of a Metagenome-Assembled Genome of an Uncultured sp. Strain Acquired from an Activated Sludge System Used for Landfill Leachate Treatment.

Using metagenome sequencing, a nearly complete genome sequence was retrieved for the uncultured sp. strain A49, recovered from an activated sludge system used for landfill leachate treatment at a closed landfill site. The total size and encoded sequences are 3,407,434 bp and 3,280 genes, respectively.

Complete Genome Sequence of sp. Strain C49, a Methane-Oxidizing Bacterium Harboring Genes for Polyhydroxyalkanoate Synthesis.

We report a complete genome sequence of sp. strain C49, a methane-oxidizing bacterium (MOB) in the class , isolated from MOB-enriched biomass. The genome encodes the functional genes for methane oxidation () and polyhydroxyalkanoate (PHA) biosynthesis ().

Exploration and enrichment of methane-oxidizing bacteria derived from a rice paddy field emitting highly concentrated methane.

Methane-oxidizing bacteria (MOB) possess the metabolic potential to assimilate the highly potent greenhouse gas, CH, and can also synthesize valuable products. Depending on their distinct and fastidious metabolic pathways, MOB are mainly divided into Type I and Type II; the latter are known as producers of polyhydroxyalkanoate (PHA). Despite the metabolic potential of MOB to synthesize PHA, the ecophysiology of MOB, especially under high CH flux conditions, is yet to be understood.

An anatomical study of the three-dimensional structure of the nasal septum in patients with alveolar clefts and alveolar-palatal clefts.

Background: The present study was performed to quantitatively analyze the three-dimensional morphology of the nasal septa of patients with alveolar and alveolopalatal clefts.

Methods: Twenty-five unilateral complete cleft lip patients with alveolar clefts only (alveolar cleft group) and 35 unilateral complete cleft lip patients with alveolar and palatal clefts (alveolar and palatal cleft group) were included in the study. Although no patient in either group had undergone alveoloplasty, all patients had undergone palatoplasty.