Besides dung ,the weed that can be used in biogas production is

Options

A. Hydrilla
B. Solanum nigrum
C. Eichhornia crassipes
D. Parthenium hysterophorus

Answer

### Step-by-Step Solution:

1. **Understanding Biogas**: Begin by defining biogas. Biogas is a type of biofuel produced from the anaerobic decomposition of organic materials, such as food scraps and animal waste (dung).

2. **Components of Biogas**: Identify the primary gases released during this process. The main components of biogas are methane and carbon dioxide, which are produced when organic matter decomposes in an environment devoid of oxygen.

3. **Identifying Alternative Organic Materials**: The question asks for a weed that can be used in biogas production besides dung.

4. **Researching Suitable Weeds**: One of the notable weeds that can be utilized for biogas production is the water hyacinth.

5. **Scientific Name**: The scientific name of water hyacinth is *Eichhornia crassipes*.

6. **Reasons for Using Water Hyacinth**: Explain why water hyacinth is suitable for biogas production. It contains a high amount of cellulose, nitrogen, and other essential nutrients, which make it an excellent substrate for fermentation and biogas production.

7. **Conclusion**: Therefore, the weed that can be used in biogas production besides dung is water hyacinth (*Eichhornia crassipes*).