Guangdong Stark Water References
Oil well water injection filtration, process circulating water filtration
Oil well water injection filtration, process circulating water filtration
Background: The client reported that the RO pre-filter cartridges in their wastewater reuse facility required replacement up to 20 times in two weeks. The pressure differential had reached 0.15 MPa within 12 hours of operation, leading to system inefficiency and increased operational workload.
Troubleshooting: On-site engineers examined the situation and found that the pre-filter cartridges appeared yellowish. While the UF outlet water showed turbidity below 0.3 NTU, the inlet to the RO pre-filter measured a high turbidity of 2.5 NTU. This indicated contamination post-ultrafiltration.
Root Cause: Further investigation revealed that the chemical dosing system had not been adjusted to match the recent drop in suspended solids and water flow rate. As a result, unhydrolyzed aluminum compounds passed through the UF membrane and triggered secondary flocculation between the UF tank and RO unit.
Solution: A series of jar tests were conducted to optimize flocculant dosing. The chemical feed was recalibrated accordingly, and the pressure drop and filter replacement issues were fully resolved.
Result: The client's system returned to stable operation, and the pre-filter cartridges operated within normal pressure ranges. The case underlines the importance of continuous monitoring, proper chemical control, and operator training in maintaining high system performance.
