Coffin and method for collecting human bones

A method of collecting bones using a coffin, comprising:

• supplying oxygen required for decomposition of a body in the coffin through one of the following:
• an air intake hole disposed on the coffin, a gap on the coffin, an opening covered by a breathable membrane disposed on the coffin, and a water electrolysis reaction in the coffin, and exhausting waste gases generated during the decomposition of the body through an exhaust air hole disposed on the coffin and an exhaust air pipe connected to the exhaust air hole;
• further comprises:
• reusing the coffin which is isolated from waste liquids generated during the decomposition of the body by a waterproof bag in a coffin body of the coffin.

A method of using a coffin to decompose a body into bones, comprising:

• supplying oxygen required for decomposition of the body in the coffin through one of the following:
• an air intake hole disposed on the coffin, a gap on the coffin, an opening covered by a breathable membrane disposed on the coffin, and a water electrolysis reaction in the coffin, and exhausting waste gases generated during the decomposition of the body through an exhaust air hole disposed on the coffin and an exhaust air pipe connected to the exhaust air hole;
• and
• further comprising:
• using sensors to detect concentrations of specific gases in the coffin, wherein the specific gases comprise oxygen, carbon dioxide, ammonia, and hydrogen sulfide.