Dialysis treatment devices for removing urea
First Claim
Patent Images
1. A dialysis treatment device comprising:
- a first filter comprising a filtration membrane, the first filter having a retentate stream;
a urea removal unit comprising urease and in fluid communication with the first filter;
a second filter comprising an ion rejection membrane and in fluid communication with the retentate stream of the first filter and the urea removal unit; and
a flow restrictor positioned between the first filter and the second filter.
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Abstract
Dialysis treatment devices and methods for removing urea from dialysis waste streams are provided. In a general embodiment, the present disclosure provides a dialysis treatment device including: 1) a first filter having a filtration membrane, 2) a urea removal unit having urease and in fluid communication with the first filter, and 3) a second filter having an ion rejection membrane and in fluid communication with the first filter and the urea removal unit.
59 Citations
17 Claims
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1. A dialysis treatment device comprising:
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a first filter comprising a filtration membrane, the first filter having a retentate stream; a urea removal unit comprising urease and in fluid communication with the first filter; a second filter comprising an ion rejection membrane and in fluid communication with the retentate stream of the first filter and the urea removal unit; and a flow restrictor positioned between the first filter and the second filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A dialysis treatment device comprising:
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a first filter comprising a filtration membrane that separates a waste fluid stream into a retentate stream and a filtrate stream comprising urea; a urea removal unit comprising urease and in fluid communication with the first filter, the urea removal unit receiving the filtrate stream from the first filter and converting the urea from the filtrate stream into an ammonia stream; a second filter comprising an ion rejection membrane and in fluid communication with the first filter and the urea removal unit, the second filter receiving at least one of the retentate stream from the first filter or the ammonia stream from the urea removal unit; a flow restrictor positioned between the first filter and the second filter; and an ammonia sorbent in fluid communication with the second filter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification