| Title | Preliminary Investigation of the Formation Mechanism of Amorphous Silica Scale in Cold Reinjection Systems at Berlin Geothermal Field, El Salvador |
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| Authors | Claudia MIRANDA, , Kotaro YONEZU, Saefudin JUHRI, Takushi YOKOYAMA |
| Year | 2025 |
| Conference | LATAM Geothermal Congress |
| Keywords | Polymerization, Silica scale, Geothermal, Reinjection, Berlin, Citric acid |
| Abstract | This study investigates the preliminar formation mechanism of silica scale in part of the Cold Reinjection System (CRS) at the Berlin Geothermal Field (BGF), which has a total installed capacity of 109.2 MW. BGF is currently operated using 17 production and 25 reinjection wells. At the TR-4 platform, two-phase fluid from production well TR-4B and TR-4C at ~180°C respectively are separated by two Cyclone separator (CS train A and CS train B) Separated steam is used for power generation, while the separated brine is routed to hot reinjection and/or binary system. Some steam is released through silencers, condenses, and flows into weir boxes where silica supersaturation and polymerization occur. One weir box from (WTrainB, 89.2°C) is treated with 50% citric acid.After injection, Citric acid 50% concentration range is 35 to 55ppm in 90ml-120ml/min in range of discharge approximated of 18-22 L/min, while another weir box (WTrainA, 60.3°C) remains untreated. These brines are mixed with the o |