biosolids: meaning, definition, pronunciation and examples
C1Technical/Environmental Science
Quick answer
What does “biosolids” mean?
A nutrient-rich organic material resulting from the treatment of sewage sludge, primarily used as a soil conditioner or fertilizer.
Audio
Pronunciation
Definition
Meaning and Definition
A nutrient-rich organic material resulting from the treatment of sewage sludge, primarily used as a soil conditioner or fertilizer.
Treated and processed sewage sludge that meets regulatory standards for land application, often used in agriculture, landscaping, or land reclamation projects. The term was coined to promote a more positive perception than 'sewage sludge'.
Dialectal Variation
British vs American Usage
Differences
Usage is nearly identical in technical contexts. The term is standard in environmental engineering and regulatory language in both regions. 'Sewage sludge' remains the more common lay term in both UK and US.
Connotations
In both varieties, the term carries a technical, sanitized connotation aimed at distancing the product from its origin. It may be viewed critically by some environmental groups as 'greenwashing'.
Frequency
Low frequency in general discourse but standard in professional environmental science, agriculture, and public works departments.
Grammar
How to Use “biosolids” in a Sentence
The council [VERB: applies/disposes of] biosolids to [NOUN: farmland/landfill].Biosolids [VERB: provide/contain] [NOUN: nutrients/organic matter].Vocabulary
Collocations
Examples
Examples of “biosolids” in a Sentence
adjective
British English
- biosolids application
- biosolids-derived compost
American English
- biosolids management
- biosolids-based fertilizer
Usage
Meaning in Context
Business
The wastewater treatment plant markets its biosolids to local farms as a cost-effective soil amendment.
Academic
The long-term study monitored heavy metal accumulation in soils following repeated biosolids application.
Everyday
The city's newsletter explained that the 'biosolids' from our toilets end up being composted and used in forestry.
Technical
The thermophilic anaerobic digestion process renders the biosolids compliant with EPA Class B pathogen reduction standards.
Vocabulary
Synonyms of “biosolids”
Strong
Neutral
Weak
Vocabulary
Antonyms of “biosolids”
Watch out
Common Mistakes When Using “biosolids”
- Using 'biosolids' to refer to untreated sewage sludge (incorrect).
- Spelling as 'bio-solids' (hyphenated form is less common).
- Using as a singular noun ('a biosolid') – it is almost always plural.
FAQ
Frequently Asked Questions
When treated and applied according to strict regulatory standards, biosolids are considered safe for their intended use. However, debates exist about potential long-term effects of trace contaminants like pharmaceuticals and heavy metals.
Compost is typically made from yard and food waste. Biosolids are specifically derived from treated human sewage sludge. Both are soil amendments, but their sources and regulatory frameworks differ significantly.
It is a specific term for the treated, stabilized solid product derived from sewage sludge. It is a euphemism, but one with a technical definition distinguishing it from raw waste.
It is not recommended for home gardens. Commercial biosolids products intended for public sale (e.g., certain bagged composts) may contain treated biosolids and will be labeled accordingly. Direct application of municipal biosolids is for agricultural-scale operations.
A nutrient-rich organic material resulting from the treatment of sewage sludge, primarily used as a soil conditioner or fertilizer.
Biosolids is usually technical/environmental science in register.
Biosolids: in British English it is pronounced /ˈbaɪəʊˌsɒlɪdz/, and in American English it is pronounced /ˈbaɪoʊˌsɑːlɪdz/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “From waste to resource”
- “Closing the nutrient loop”
Learning
Memory Aids
Mnemonic
Think: BIO (life, organic) + SOLIDS (not liquid) = the solid organic product from treated sewage, used to give life to soil.
Conceptual Metaphor
WASTE IS A RESOURCE; THE CIRCULAR ECONOMY
Practice
Quiz
What is the primary purpose of producing biosolids?