How is biotechnology department of Heritage Institution of Technology in terms of facilities quality management and placements compared to the other branches like CSE and ECE?

The faculty and the labs are excellent at Biotechnology Department. Placements are also good. You will find many students in this department who are really very serious and good in studies ie. better than many students of ECE and CSE. 

Most probably the all-department topper in our first semester was from the Biotech department. You may take it if you are interested in this subject. 

In Heritage, placement means getting placed in the IT sector doesn't matter of any branch. Other branches can't be compared with others, as every branch has its own requirements.