After the visit to Dr. Ziggy SMTC lab in NTU, the design team improved on the previous P&ID. Here is the final P&ID design:
We had a meeting on 31st July with the other 9 members and Mr. Ting to research on soem patents and extract some of their ideas and industrial concepts. This will help us to familliarise with RO pilot plant designs, as well as to compare them with industrial standards and our vendors' designs.
Patent #1:
Some pointers of the patent:
-2 stage RO membrane
-high pressure and recovery
-prevent scale formation
-1st stage(low pressure)
-2nd stage(high pressure, hardness compound removed)
Patent #2:
Some pointers of the patent:
-Two stage seawater desalination system that includes first and second stage high performance
-NF membranes in series flow relationship
-First stage membrane being pumped with seawater pressurized sufficiently to produce a firs permeate and a first reject
-Second stage membrane being pumped with first permeate between 200-300 psi to produce potable water and second reject
Patent #3:
Some pointers of the patent:
-The supply of seawater at low pressure creates no/a little permeate flow through the RO
membranes
-The seawater flushes the feed side of the RO to the NF element where significant permeate flux
occurs
-NF permeate depleted in divalent ions and optionally depleted in monovalent ions
Before our examinations, we presented what we have done for the project (so far) to Professor Bill
when he visited us. After some dicussion with the professor and lecturers, we have encountered
new problems in out design and intend to improve on it before the final design is made by the
vendors.
