Patent ID: 8679348
Filing Date: 2014-03-25
Classification: A61M,C02F

Abstract:
1. A method of providing a treatment fluid, comprising: providing a water purification plant with a replaceable component having first and second filter stages, each stage being sufficient to purify the water to the same target level of purity and thereby the stages being redundant; providing a breakthrough water quality sensor between the first and second stages; receiving a command to produce a batch of purified water; determining whether the replaceable component is expired responsive to a data carrier affixed to the replaceable component; responsively to a result of the determining, pumping unpurified water through the first stage and then through the second stage into a batch container if the replaceable component is determined to be unexpired and preventing pumping if the replaceable component is expired; conditioned on detecting a breakthrough of contamination responsively to the water quality sensor, continuing the pumping to flow a predetermined amount of water into the batch container while the second stage provides the target level of purity and thereafter preventing the pump from flowing water through the replaceable component until the replaceable component is replaced; and after replacing the replaceable component, repeating the determining and pumping using a new replaceable component, wherein the first filter stage has a substantially larger capacity than the second stage.