The court of district and sessions judge Mahadev Katulkar found all the accused guilty under various sections of IPC, Special Public Prosecutor TC Pandya told PTI.
Three prime accused, namely Mannulal Gota, the teacher, Dinanath Nagesh, the hostel watchman and Babita Markam, the hostel superintendent, were sentenced to life imprisonment and a fine of Rs 500 was imposed on each of them, he said.
Among other accused, block education officer (BEO) SS Navarji and additional block education officer (ABEO) Jitendra Kumar Nayak were sentenced to five years in jail while Sagar Katlam, the teacher, Sukalu Netam, the sarpanch and Lachuram Salaam were handed down the jail term of three years, Pandya said.
The court also ordered the state government to pay compensation of Rs 1.05 crore; Rs 7 lakh to each of the 15 victims.
Six more victims were identified later.
The incident had sparked outrage across the state, prompting the government to conduct inspection of all residential schools and hostels.