Pollution from animal excreta and organic waste from kitchen can be most profitably minimized by

Options

A. storing them in underground storage tanks
B. using them for producing biogas
C. vermiculture
D. using them directly as biofertilizers

Answer

To solve the question regarding how to most profitably minimize pollution from animal excreta and organic waste from the kitchen, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Nature of Waste**:
- Recognize that both animal excreta and organic kitchen waste are biodegradable materials. This means they can be broken down by natural processes.

**Hint**: Consider what types of waste are biodegradable and how they can be managed.

2. **Understand the Processes Involved**:
- Biodegradable waste can decompose through various methods, including aerobic and anaerobic processes. The anaerobic process occurs in the absence of oxygen and involves specific bacteria.

**Hint**: Think about the different methods of decomposition and which ones are most effective for reducing waste.

3. **Recognize the Byproducts of Decomposition**:
- During anaerobic fermentation, bacteria break down the organic matter, producing gases such as methane and nitrous oxide. These gases can be captured and used as energy sources.

**Hint**: What gases are produced during the breakdown of organic waste, and how can they be utilized?

4. **Evaluate the Options Provided**:
- Option A: Storing in underground tanks does not utilize the waste effectively.
- Option B: Using them for producing biogas utilizes the waste and generates energy.
- Option C: Vermiculture (using worms) is beneficial but may not be as profitable as biogas production.
- Option D: Using directly as biofertilizers is useful, but it does not address pollution as effectively as biogas production.

**Hint**: Compare the efficiency and profitability of each option in terms of waste management and energy production.

5. **Select the Best Option**:
- Based on the analysis, the most profitable method to minimize pollution from animal excreta and organic kitchen waste is through the production of biogas, as it not only reduces waste but also generates energy.

**Hint**: Which option provides both waste reduction and an energy source?

### Final Answer:
The correct answer is **Option B: using them for producing biogas**. This method effectively minimizes pollution from animal excreta and organic kitchen waste while providing a renewable energy source.