Water treatment system

This invention describes a system for cleaning raw water, such as river or lake water, to make it suitable for drinking or industrial use. It operates by passing water through a special filter membrane to remove impurities. When the filter gets dirty, the system automatically cleans it by flushing filtered water backward through the membrane, treating the dirty backwash water, and returning it to the raw water tank. The system specifically incorporates ultraviolet light reactors that use a particular wavelength of UV light (253.7 nm) to kill germs, with the lamps protected by quartz tubes.