Biosolids: It’s What’s For Dinner & Mitigation Strategies

Have you come across the latest societal and health concern known as "biosolids"? It's likely that you haven't, primarily because it receives little attention in the media. According to the corporate definition, biosolids are described as nutrient-rich organic materials derived from the treatment of household sewage at wastewater facilities. They are often used to enhance soil and as fertilizers, providing essential nutrients and organic matter for plants. Furthermore, biosolids can be added to compost and are included in some commercial fertilizers.

However, one must question how materials largely composed of "recycled" sewage from various sources—including commercial, industrial, and residential waste, which can contain everything from slaughterhouse byproducts to toxic chemicals—can be deemed safe. It is crucial to note that industrial effluents should not be part of the biosolid mix, while residential waste may be more acceptable, as it typically lacks the hazardous chemicals that industries often discharge in massive quantities.

Critics of the biosolid industry raise valid concerns that chemicals from these materials can leach into the soil and groundwater, where they are taken up by plants and animals. This bioaccumulation can pose serious risks to humans, livestock, and wildlife as these toxins move up the food chain.

While biosolids are marketed as fertilizers, they can carry potential health hazards due to the presence of pathogens and contaminants. These risks include the possibility of food crops becoming contaminated, drinking water being tainted, and inhalation of harmful pollutants. Moreover, some biosolids may contain elevated levels of toxic metals or chemicals, necessitating careful monitoring and management.