Black soldier fly larvae demonstrate significant reduction of human pathogenic viruses in organic waste streams

ACS researchers show black soldier fly larvae can eat manure and sewage while reducing human-pathogenic viruses, offering a natural waste management tool.

By: AXL Media

Published: Mar 4, 2026, 9:24 AM EST

Source: The information in this article was sourced from American Chemical Society

Insects as a sustainable waste management solution

The management of organic waste, including spoiled food, sewage sludge, and livestock manure, remains a significant environmental challenge, typically resulting in landfill accumulation or incineration. A new study published in Environmental Science & Technology Letters by the American Chemical Society suggests a biological alternative using black soldier fly larvae. These insects are known for their ability to consume vast quantities of organic matter, but their role in viral mitigation has remained largely unexamined until now. Researchers conducted a systematic study to determine if these larvae could not only reduce the volume of waste but also neutralize the pathogenic risks associated with it.

Efficacy of viral breakdown across waste types

Led by Gang Luo and Zhijian Shi, the research team evaluated how black soldier fly larvae handled RNA viruses in three distinct waste streams. The larvae were divided into groups and fed either food waste, sewage sludge, or pig manure. After an eight-day period, the researchers observed significant weight gain across all groups, with those consuming food waste exhibiting the highest growth rates. The initial feedstocks contained a diverse array of RNA viruses capable of infecting bacteria, fungi, plants, and humans. The study aimed to track whether these viruses persisted within the larvae's bodies or in their frass—the nutrient-rich pellets excreted by the larvae.

Neutralization of human pathogenic noroviruses

The experiments revealed that larval digestion is highly effective at decreasing the abundance of most human-pathogenic viruses, such as noroviruses. In the group fed food waste, the larvae contained only low amounts of insect-specific viruses, which pose minimal risk to humans or the broader ecology. This finding supports the use of black soldier fly larvae as a safe method for processing urban food waste into usable biomass. However, the results were more complex for fecal-based organic matter, where the baseline viral diversity was significantly higher from the outset.