Treating desalter water effluent for wash water reuse in a GOSP using a ceramic nanofiltration membrane
Systems and methods include a Gas and Oil Separation Plant (GOSP)-embedded treatment system for recycling desalter wash water. The system includes: 1) an inlet system providing an inlet stream of desalter water effluent received from at least one desalter of a source; 2) a filtering system in the GOSP including a nanofiltration (NF) membrane configured to filter the desalter water effluent to attain filtered desalter water effluent within a pre-determined wash water threshold for wash water reuse, including: partially desalinating the desalter water effluent to attain a Total Dissolved Solids (TDS) of the desalter water effluent within a pre-determined TDS threshold; and 3) a pump system configured to pump the desalter water effluent through the NF membrane and pump the filtered desalter water effluent to a supply line of the desalter.
1. A method of a Gas-Oil Separation Plant (GOSP)-embedded treatment system for recycling desalter wash water, comprising:
receiving, by an inlet system at the GOSP, an inlet stream of desalter water effluent received from at least one desalter of a source;
filtering, in response to receiving the an inlet stream of desalter water and using a filtering system in the GOSP including a nanofiltration (NF) membrane, the desalter water effluent to attain filtered desalter water effluent within a pre-determined wash water threshold for wash water reuse, including:
partially desalinating the desalter water effluent to attain a Total Dissolved Solids (TDS) of the desalter water effluent within a pre-determined TDS threshold; and
pumping, using a pump system of the GOSP: 1) the desalter water effluent through the NF membrane; and 2) the filtered desalter water effluent to a supply line of the desalter.
2. The method of claim 1 , wherein the pre-determined wash water threshold is a 50% reduction of fresh water consumption by the GOSP.
3. The method of claim 1 , wherein the NF membrane is operating at temperatures above 40 degrees Celsius (° C.).
4. The method of claim 1 , wherein the NF membrane provides a Molecular Weight Cut-Off (MWCO) of up to 15,000 Dalton.
5. The method of claim 1 , wherein the NF membrane has a MWCO in a range from 100 Dalton to 300 Dalton.
6. The method of claim 1 , wherein the filtering system includes a dead-end configuration of the NF membrane in which the NF membrane is cleaned after a period of use.
7. The method of claim 1 , wherein the filtering system includes a cross-flow membrane configuration of the NF membrane.
8. The method of claim 1 , wherein the pre-determined TDS threshold is lower than 8,000 parts per million (ppm).
9. The method of claim 1 , wherein the NF membrane is a ceramic NF membrane.
10. The method of claim 1 , wherein the inlet system includes at least one pump, and wherein the source is the GOSP.