The Dry Composting Toilet An efficient, dignified, and healthy system for everyone The dry composting toilet (DCT) is a system for the treatment of human excrement capable of destroying the microbes that make us sick without wasting or contaminating water. The DCT is an efficient, simple and worthy technology, despite the fact that most people underestimate it or aren't familiar with it. 1-Nov-2003 | Lourdes Castillo Castillo