Patent attributes
A water treatment process whereby heat is used and recaptured to pasteurize water and or sewage effluent. Contaminated waters are partially treatable utilizing bacterial and chemical processes; however some bacteria (e.g. Cryptosporidium and Giardia) are resistant to chemicals. The present process raises the temperature of the water to a desired pasteurization temperature and for a corresponding required length of time to destroy pathogens and viruses. A heat exchanger is employed to use the waste heat from the pasteurization tank to pre-heat the fluid entering the tank. After the initial heating of the tank, the pre-heating reduces the required heat to maintain the temperature of the tank. Make-up heat increases the temperature within a small temperature range. The make-up heat may be waste heat from a separate process.
