Sewage does not contain \ \ \ \ \ \ . - UP NHM CHO 7 Sept 2022(shift-1st)

UP NHM CHO 7 Sept 2022(shift-1st)

Community Health Nursing

Easy

Appeared in: UP NHM CHO 7 Sept 2022(shift-1st)

Explanation

Solid waste from industries is, by definition, solid material and is managed separately from liquid waste streams.
Sewage is defined as wastewater from a community, which is primarily liquid, containing dissolved and suspended solids.
Industrial solid waste includes materials like scrap metal, plastics, and other non-liquid byproducts that are not transported through sewer systems.
Waste management systems have distinct pathways for liquid waste (sewerage) and solid waste (garbage collection, landfills).

Option A: Human excreta (feces and urine) is a primary and defining component of sewage, often referred to as blackwater.
Option B: Wastewater from bathrooms (from showers, sinks, and tubs) is a major type of domestic sewage, known as greywater or sullage.
Option C: Wastewater from domestic kitchens is another form of greywater/sullage and a standard component of municipal sewage.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Composition of Sewage and Waste Classification as background academic context rather than a clinical decision trigger.
Understanding the composition of sewage is crucial for public health nurses to assess risks of waterborne diseases like cholera, typhoid, and hepatitis A, which are transmitted through fecal contamination of water.
Proper sewage management is a cornerstone of community sanitation and disease prevention. Improper disposal can lead to contamination of soil, water supplies, and food.
What if? If industrial liquid waste (effluent) containing heavy metals enters the sewage system, it requires specialized tertiary treatment at the plant to prevent environmental toxicity and harm to human health. This is different from managing solid industrial waste.

How to Approach the Question

First, identify the key term in the question: 'sewage'.
Next, note the negative framing: 'does not contain'. This means you are looking for the option that is an exception.
Recall or deduce the fundamental definition of sewage. It is primarily liquid waste or 'wastewater'.
Evaluate each option against this definition. Human excreta, bathroom water, and kitchen water are all sources of wastewater.
The option 'Solid waste from industries' is explicitly 'solid', not 'wastewater'. This makes it the correct exception and the right answer.

Concept Tested & Keywords

Concept Tested: Composition of Sewage and Waste Classification
Stem keywords: Sewage, contain
Lead-in keywords: does not
Negative lead-in flag: Question is negatively framed (asks what is NOT included)

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