There are many colleges which provide B.Tech in Biotechnology but below I am providing the best ones, please go through -
Top Institutes:

1.Indian Institute of Technology, Roorkee
2.Indian Institute of Technology, Delhi
3.Indian Institutes of Technology, Guwahati
4.School of Life Sciences, University of Hyderabad, Hyderabad
5.School of Biotechnology, Jawaharlal Nehru University (JNU), New Delhi
6.Rajiv Gandhi Centre for Biotechnology, Trivandrum, Kerala
7.School of Chemical and Biotechnology, Sastra University, Thanjavur
8.Department of Biotechnology, SRM University, Tamil Nadu
9.GGS Indraprastha University, Delhi
10.Department of Biotechnology, SRM University, Tamil Nadu
11.Jaypee Institute of Information Technology, Noida
12.Amity Institute of Biotechnology, Noida
13.Oxford College of Science, Bangalore

Good Luck!!!