Development of methods for detecting viruses in solid waste landfill leachates.

Area of Science:

• Environmental Microbiology
• Virology
• Waste Management

Background:

• Municipal solid waste landfill leachates can contain enteric viruses.
• Detecting and concentrating these viruses is crucial for public health risk assessment.
• Existing methods face challenges due to leachate composition.

Purpose of the Study:

• To develop and validate a method for detecting and concentrating enteric viruses in landfill leachates.
• To overcome challenges posed by leachate particulates and interfering substances.
• To enable efficient monitoring of viral contamination in solid waste disposal sites.

Main Methods:

• Leachate treatment with sodium (tetra)ethylenediaminetetraacetate to overcome particulate adsorption.
• Clarification by filtration at pH 8.0.
• Anion-exchange resin treatment to remove interfering substances.
• Virus concentration using epoxy-fiber glass adsorbent at pH 3.5 with AlCl(3) addition.
• Elution of concentrated viruses.

Main Results:

• The developed method successfully detects and concentrates enteric viruses, including poliovirus.
• Sodium (tetra)ethylenediaminetetraacetate treatment and anion-exchange resin effectively removed interfering substances.
• An average poliovirus recovery efficiency of 37% was achieved after 100-fold concentration.
• The method demonstrated effectiveness across various leachate types.

Conclusions:

• A robust method for detecting and concentrating enteric viruses in landfill leachates has been established.
• This method addresses key challenges, improving virus recovery and detection.
• The findings support enhanced environmental monitoring of solid waste disposal sites for viral pathogens.