Apart from the Food Industries you can go for:

• IT jobs like BPO offered by the TCS, Wipro, Cognizant etc which are open to all the branches.
• You can go for the MBA course after your BTECH.
• You can apply to become lecturer/Teacher at the Polytechnic colleges.
• You can do some start up.
• You can go for the coaching centres which gives education to the Engineering entrances and you can be a faculty there if you are strong in your 10+2 concepts.

To know more about BTech in Food Technology, visit the link below:

https://www.careers360.com/courses/b-tech-in-food-technology

I hope this answer helps. All the very best for your future endeavors!