The bio-toilet was introduced under a state government scheme to eradicate open defecation. Kappalur was chosen as the first village to have the facility, an official release said.
Rural Development Agency Director Rohini Ramdoss said the facility, designed by the Defence Research and Development Organisation, would have six toilets, three for men and three for women.
Bacteria is used to convert human waste into vapour and gas, which can be easily disposed. There would be no foul smell and the septic tank would last much longer, she said.
She said one panchayat in every district would have a bio-toilet, which would cost around Rs 4.5 lakh.
The director said integrated sanitary complexes were set up at village level throughout the state. Besides 1.71 lakh individual toilets had been planned, she added.