Brewery and sugar factory waster alters the quality of a water body by increasing

Options

A. temperauture
B. turbidity
C. pH
D. COD and BOD

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks how the waste from breweries and sugar factories affects the quality of water bodies.

2. **Identifying Key Terms**: The key terms in the question are "Brewery and sugar factory waste," "quality of water body," "increasing," and the specific indicators of water quality: COD (Chemical Oxygen Demand) and BOD (Biological Oxygen Demand).

3. **Defining COD and BOD**:
- **COD (Chemical Oxygen Demand)**: This is a measure of the total quantity of oxygen required to oxidize all organic material in water. Higher COD values indicate a higher level of pollutants in the water.
- **BOD (Biological Oxygen Demand)**: This measures the amount of oxygen consumed by microorganisms while decomposing organic matter in water. Higher BOD values indicate more organic pollution, which can lead to lower oxygen levels in the water.

4. **Impact of Brewery and Sugar Factory Waste**:
- The waste from these industries typically contains high levels of organic materials and other chemicals.
- When this waste is discharged into water bodies, it leads to an increase in both COD and BOD values.
- Increased COD indicates that there are more chemicals that need to be oxidized, while increased BOD indicates that there is more organic matter that needs to be decomposed by bacteria.

5. **Consequences of Increased COD and BOD**:
- High COD and BOD values indicate contamination of the water.
- This contamination can lead to depletion of oxygen in the water, harming aquatic life and making the water unsafe for domestic use.

6. **Conclusion**: The waste from breweries and sugar factories alters the quality of water bodies by increasing the COD and BOD values, indicating higher levels of contamination.

### Final Answer
The waste from breweries and sugar factories alters the quality of a water body by increasing the Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD) values.

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