Which component from the wastewater list does not include living organisms?

FOG, which stands for fats, oils, and grease, is a component of wastewater that does not include living organisms. It is a collective term for the greasy substances that accumulate in wastewater systems, primarily from food preparation, processing, and certain industrial activities. Unlike pathogens, which are living microorganisms that can cause disease, and bacteria, which are also living organisms essential to many biological treatment processes, FOG consists of non-living organic substances. Water, while it can contain living organisms in treated or untreated forms, is primarily a solvent and foundational component of the wastewater itself, but does not include living organisms when considered as a pure substance.