Sewage sludge does not contain

Options

A. Nitrogen
B. Phosphorus
C. Potassium
D. All of these

Answer

To solve the question "Sewage sludge does not contain," we will analyze the components typically found in sewage sludge and identify which one is absent.

### Step-by-Step Solution:

1. **Understanding Sewage Sludge**:
- Sewage sludge is a semi-solid by-product generated during the treatment of sewage and wastewater from industrial and municipal sources. It contains various organic and inorganic materials.

2. **Identifying Common Components**:
- Sewage sludge typically contains essential nutrients such as nitrogen and phosphorus, which are often found in fertilizers and pesticides. These nutrients are present because they are part of the waste that enters sewage systems.

3. **Analyzing the Options**:
- The options given are:
- A) Nitrogen
- B) Phosphorus
- C) Potassium
- From our understanding, nitrogen and phosphorus are commonly found in sewage sludge.

4. **Determining the Absent Component**:
- Potassium is less commonly associated with sewage sludge compared to nitrogen and phosphorus. Therefore, it is reasonable to conclude that sewage sludge does not contain potassium.

5. **Final Answer**:
- Based on the analysis, the correct answer is **C) Potassium**.