Power and water usage in haemodialysis facilities remains high, prompting a call for efficiency to be considered during procurement and in the operation of different systems .
As well, regular audits of resource usage in dialysis facilities should be conducted in order to encourage future improvements, the authors of a Victorian study say.
The study, published in Kidney International Reports [link here], reviewed power and water usage over two sequential two-week periods at the 15-chair Essendon Fields (EF) haemodialysis facility and the 12-chair Barwon Health North (BHN) facility.
The study, led by Dr Katherine Barraclough from the Royal Melbourne Hospital, found the average total power consumption at EF was 5.3 kWh per treatment comprising 3.1 kWh for the reverse osmosis (RO) plant and 2.2 kWh for the dialysis machines.
The estimated water consumption at the facility was 357 l per treatment. Of the 7.1 m3 of mains water coming into the RO plant per day, about 54% was discarded.
Meanwhile the BHN facility used about 10-12 kWh power per treatment comprising 7.2 kWh during automatic operation of the RO plant or 8.7 kWh during manual operation of the RO plant plus 3.1 kWh for the dialysis units.
Estimated per-treatment water consumption in manual and automatic modes were 754 l and 548 l, respectively. RO plant water usage was about 11.1 m3 in manual mode and 8.1 m3 in the automatic mode.
The study authors said there were lessons to be learned from the differences between the two facilities.
“We found substantial differences in per-treatment resource consumption between them as follows: average power usage was almost 2-fold higher and average water usage 1.5-fold higher at BHN than at EF, when the BHN RO plant was operating in the efficient automatic mode,” it said.
“When BNH’s RO plant was operating in manual mode, energy and water consumption were even higher.”