Non-biodergradable industrial waste that can be utilized by cement industry is

Options

A. Fly ash
B. Slag
C. Gypsum
D. Both 1 and 2

Answer

To solve the question regarding the non-biodegradable industrial waste that can be utilized by the cement industry, we will analyze the options provided and determine which of them is applicable.

### Step-by-Step Solution:

1. **Understand the Types of Waste**:
- There are two main types of waste: biodegradable and non-biodegradable.
- Biodegradable waste can decompose naturally, while non-biodegradable waste does not break down easily.

2. **Identify Non-Biodegradable Waste**:
- Non-biodegradable waste is generated from various industries, including thermal power plants and iron and steel plants.
- Examples of non-biodegradable waste include fly ash (from thermal power plants), slag (from iron and steel plants), and gypsum (from fertilizer industries).

3. **Evaluate the Options**:
- The options given are:
- (A) Fly ash
- (B) Slag
- (C) Gypsum
- (D) Both 1 and 2 (which refers to fly ash and slag)
- We need to determine which of these can be utilized by the cement industry.

4. **Utilization in Cement Industry**:
- Fly ash and slag are both known to be used in the manufacturing of cement.
- Gypsum, on the other hand, is not primarily used in cement production but rather in the production of plaster and wallboard.

5. **Conclusion**:
- Since both fly ash and slag can be utilized by the cement industry, the correct answer is option (D) Both 1 and 2.

### Final Answer:
The non-biodegradable industrial waste that can be utilized by the cement industry is **Both 1 and 2 (Fly ash and Slag)**.

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