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Publikasjoner

NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.

2026

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Sammendrag

Microalgae exhibit unique advantages in ARG removal, yet their growth and efficacy are often constrained by complex organic matter and microorganisms in wastewater. To address this issue, this study employed chemical pretreatment to synergistically enhance microalgal treatment and, for the first time, developed a novel coupled process to tackle ARGs in livestock wastewater. The results indicate that low-chlorine (1 mg/L) pretreatment combined with the indigenous filamentous alga (S2) significantly removed pollutants (TN: 81.50%, COD: 70.71%) and reduced the total abundance of ARGs by 81.73%. The core mechanism lies in low-chlorine pretreatment shaping a mutually beneficial algae-bacteria system, which achieves efficient ARG control by altering the host bacterial. The study formalized the operating condition with a multi-objective desirability index combining nutrient removal, ARG reduction, and algal growth, which identified 1 mg/L as the overall optimum. The combined treatment process at a low chlorine dosage demonstrated both high efficiency and feasibility, providing an innovative strategy for livestock wastewater treatment.

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Sammendrag

The spread of antibiotic resistance genes (ARGs) in livestock and poultry wastewater poses a serious threat to the ecological environment and public health. This study compared the effects of biochar (BC), ferrous sulfate (FS), ferrous sulfate-modified biochar (FC), a physical mixture of ferrous sulfate and biochar (F_C), and sulfuric acid (HS) on ARG dynamics and nitrogen metabolism during the 60-day storage and fermentation of pig manure slurry. The results showed that single treatments (BC or FS) had limited ARG-removal efficiency. Compared with the control, the F_C treatment maintained higher total nitrogen (TN) levels (up to 2.42 mg/g in F_C3) while contributing to ARG reduction; however, its ARG-removal performance was not consistently superior to that of all other treatments. Although HS inhibited some ARGs, strong acidification altered the microbial community structure and may have disrupted ecological stability. Metagenomic analysis revealed that multidrug, peptide, and glycopeptide ARGs were dominant (approximately 80%) and were significantly positively correlated with key nitrogen-metabolism genes (e.g., nxrAB and nasAB, p < 0.01), suggesting a link between nitrogen cycling and ARG dissemination. Overall, the physical mixing of biochar and ferrous sulfate shows potential as a practical strategy for jointly regulating ARG dynamics and nitrogen transformation during pig manure slurry storage and fermentation, but further optimisation and validation are needed before field-scale application.